1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>DVB Frontend properties</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="LINUX MEDIA INFRASTRUCTURE API"><link rel="up" href="dvb_frontend.html" title="Chapter 9. DVB Frontend API"><link rel="prev" href="dvb-fe-read-status.html" title="Querying frontend status and statistics"><link rel="next" href="frontend_fcalls.html" title="Frontend Function Calls"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">DVB Frontend properties</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="dvb-fe-read-status.html">Prev</a> </td><th width="60%" align="center">Chapter 9. DVB Frontend API</th><td width="20%" align="right"> <a accesskey="n" href="frontend_fcalls.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="frontend-properties"></a>DVB Frontend properties</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#dtv-stats">struct <span class="structname">dtv_stats</span></a></span></dt><dt><span class="section"><a href="frontend-properties.html#dtv-fe-stats">struct <span class="structname">dtv_fe_stats</span></a></span></dt><dt><span class="section"><a href="frontend-properties.html#dtv-property">struct <span class="structname">dtv_property</span></a></span></dt><dt><span class="section"><a href="frontend-properties.html#dtv-properties">struct <span class="structname">dtv_properties</span></a></span></dt><dt><span class="section"><a href="frontend-properties.html#id-1.5.5.11.14">Property types</a></span></dt><dt><span class="section"><a href="frontend-properties.html#fe_property_parameters">Digital TV property parameters</a></span></dt><dt><span class="section"><a href="frontend-properties.html#frontend-stat-properties">Frontend statistics indicators</a></span></dt><dt><span class="section"><a href="frontend-properties.html#frontend-property-terrestrial-systems">Properties used on terrestrial delivery systems</a></span></dt><dt><span class="section"><a href="frontend-properties.html#frontend-property-cable-systems">Properties used on cable delivery systems</a></span></dt><dt><span class="section"><a href="frontend-properties.html#frontend-property-satellite-systems">Properties used on satellite delivery systems</a></span></dt></dl></div><p>Tuning into a Digital TV physical channel and starting decoding it 2 requires changing a set of parameters, in order to control the 3 tuner, the demodulator, the Linear Low-noise Amplifier (LNA) and to set the 4 antenna subsystem via Satellite Equipment Control (SEC), on satellite 5 systems. The actual parameters are specific to each particular digital 6 TV standards, and may change as the digital TV specs evolves.</p><p>In the past, the strategy used was to have a union with the parameters 7 needed to tune for DVB-S, DVB-C, DVB-T and ATSC delivery systems grouped 8 there. The problem is that, as the second generation standards appeared, 9 those structs were not big enough to contain the additional parameters. 10 Also, the union didn't have any space left to be expanded without breaking 11 userspace. So, the decision was to deprecate the legacy union/struct based 12 approach, in favor of a properties set approach.</p><p>NOTE: on Linux DVB API version 3, setting a frontend were done via 13 <a class="link" href="frontend_legacy_dvbv3_api.html#dvb-frontend-parameters" title="frontend parameters">struct <code class="constant">dvb_frontend_parameters</code></a>. 14 This got replaced on version 5 (also called "S2API", as this API were 15 added originally_enabled to provide support for DVB-S2), because the old 16 API has a very limited support to new standards and new hardware. This 17 section describes the new and recommended way to set the frontend, with 18 suppports all digital TV delivery systems.</p><p>Example: with the properties based approach, in order to set the tuner 19 to a DVB-C channel at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol 20 rate of 5.217 Mbauds, those properties should be sent to 21 <a class="link" href="FE_GET_PROPERTY.html" title="ioctl FE_SET_PROPERTY, FE_GET_PROPERTY"><code class="constant">FE_SET_PROPERTY</code></a> ioctl:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a> = SYS_DVBC_ANNEX_A</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a> = 651000000</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a> = QAM_256</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a> = INVERSION_AUTO</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-SYMBOL-RATE" title="DTV_SYMBOL_RATE"><code class="constant">DTV_SYMBOL_RATE</code></a> = 5217000</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-INNER-FEC" title="DTV_INNER_FEC"><code class="constant">DTV_INNER_FEC</code></a> = FEC_3_4</p></li><li class="listitem"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li></ul></div><p>The code that would do the above is:</p><pre class="programlisting"> 22#include <stdio.h> 23#include <fcntl.h> 24#include <sys/ioctl.h> 25#include <linux/dvb/frontend.h> 26 27static struct dtv_property props[] = { 28 { .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A }, 29 { .cmd = DTV_FREQUENCY, .u.data = 651000000 }, 30 { .cmd = DTV_MODULATION, .u.data = QAM_256 }, 31 { .cmd = DTV_INVERSION, .u.data = INVERSION_AUTO }, 32 { .cmd = DTV_SYMBOL_RATE, .u.data = 5217000 }, 33 { .cmd = DTV_INNER_FEC, .u.data = FEC_3_4 }, 34 { .cmd = DTV_TUNE } 35}; 36 37static struct dtv_properties dtv_prop = { 38 .num = 6, .props = props 39}; 40 41int main(void) 42{ 43 int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR); 44 45 if (!fd) { 46 perror ("open"); 47 return -1; 48 } 49 if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) { 50 perror("ioctl"); 51 return -1; 52 } 53 printf("Frontend set\n"); 54 return 0; 55} 56</pre><p>NOTE: While it is possible to directly call the Kernel code like the 57 above example, it is strongly recommended to use 58 <a class="ulink" href="http://linuxtv.org/docs/libdvbv5/index.html" target="_top">libdvbv5</a>, 59 as it provides abstraction to work with the supported digital TV standards 60 and provides methods for usual operations like program scanning and to 61 read/write channel descriptor files.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="dtv-stats"></a>struct <span class="structname">dtv_stats</span></h3></div></div></div><pre class="programlisting"> 62struct dtv_stats { 63 __u8 scale; /* enum fecap_scale_params type */ 64 union { 65 __u64 uvalue; /* for counters and relative scales */ 66 __s64 svalue; /* for 1/1000 dB measures */ 67 }; 68} __packed; 69</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="dtv-fe-stats"></a>struct <span class="structname">dtv_fe_stats</span></h3></div></div></div><pre class="programlisting"> 70#define MAX_DTV_STATS 4 71 72struct dtv_fe_stats { 73 __u8 len; 74 struct <a class="link" href="frontend-properties.html#dtv-stats" title="struct dtv_stats">dtv_stats</a> stat[MAX_DTV_STATS]; 75} __packed; 76</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="dtv-property"></a>struct <span class="structname">dtv_property</span></h3></div></div></div><pre class="programlisting"> 77/* Reserved fields should be set to 0 */ 78 79struct dtv_property { 80 __u32 cmd; 81 __u32 reserved[3]; 82 union { 83 __u32 data; 84 struct <a class="link" href="frontend-properties.html#dtv-fe-stats" title="struct dtv_fe_stats">dtv_fe_stats</a> st; 85 struct { 86 __u8 data[32]; 87 __u32 len; 88 __u32 reserved1[3]; 89 void *reserved2; 90 } buffer; 91 } u; 92 int result; 93} __attribute__ ((packed)); 94 95/* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */ 96#define DTV_IOCTL_MAX_MSGS 64 97</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="dtv-properties"></a>struct <span class="structname">dtv_properties</span></h3></div></div></div><pre class="programlisting"> 98struct dtv_properties { 99 __u32 num; 100 struct <a class="link" href="frontend-properties.html#dtv-property" title="struct dtv_property">dtv_property</a> *props; 101}; 102</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="id-1.5.5.11.14"></a>Property types</h3></div></div></div><p> 103On <a class="link" href="FE_GET_PROPERTY.html" title="ioctl FE_SET_PROPERTY, FE_GET_PROPERTY">FE_GET_PROPERTY and FE_SET_PROPERTY</a>, 104the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to 105get/set up to 64 properties. The actual meaning of each property is described on the next sections. 106</p><p>The available frontend property types are shown on the next section.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="fe_property_parameters"></a>Digital TV property parameters</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#DTV-UNDEFINED"><code class="constant">DTV_UNDEFINED</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-TUNE"><code class="constant">DTV_TUNE</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-CLEAR"><code class="constant">DTV_CLEAR</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-MODULATION"><code class="constant">DTV_MODULATION</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-BANDWIDTH-HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-INVERSION"><code class="constant">DTV_INVERSION</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-DISEQC-MASTER"><code class="constant">DTV_DISEQC_MASTER</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-SYMBOL-RATE"><code class="constant">DTV_SYMBOL_RATE</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-INNER-FEC"><code class="constant">DTV_INNER_FEC</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-VOLTAGE"><code class="constant">DTV_VOLTAGE</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-TONE"><code class="constant">DTV_TONE</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-PILOT"><code class="constant">DTV_PILOT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ROLLOFF"><code class="constant">DTV_ROLLOFF</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-DISEQC-SLAVE-REPLY"><code class="constant">DTV_DISEQC_SLAVE_REPLY</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-FE-CAPABILITY-COUNT"><code class="constant">DTV_FE_CAPABILITY_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-FE-CAPABILITY"><code class="constant">DTV_FE_CAPABILITY</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-DELIVERY-SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ISDBT-PARTIAL-RECEPTION"><code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ISDBT-SOUND-BROADCASTING"><code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ISDBT-SB-SUBCHANNEL-ID"><code class="constant">DTV_ISDBT_SB_SUBCHANNEL_ID</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ISDBT-SB-SEGMENT-IDX"><code class="constant">DTV_ISDBT_SB_SEGMENT_IDX</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ISDBT-SB-SEGMENT-COUNT"><code class="constant">DTV_ISDBT_SB_SEGMENT_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#isdb-hierq-layers"><code class="constant">DTV-ISDBT-LAYER*</code> parameters</a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-API-VERSION"><code class="constant">DTV_API_VERSION</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-CODE-RATE-HP"><code class="constant">DTV_CODE_RATE_HP</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-CODE-RATE-LP"><code class="constant">DTV_CODE_RATE_LP</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-GUARD-INTERVAL"><code class="constant">DTV_GUARD_INTERVAL</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-TRANSMISSION-MODE"><code class="constant">DTV_TRANSMISSION_MODE</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-HIERARCHY"><code class="constant">DTV_HIERARCHY</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STREAM-ID"><code class="constant">DTV_STREAM_ID</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-DVBT2-PLP-ID-LEGACY"><code class="constant">DTV_DVBT2_PLP_ID_LEGACY</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-ENUM-DELSYS"><code class="constant">DTV_ENUM_DELSYS</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-INTERLEAVING"><code class="constant">DTV_INTERLEAVING</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-LNA"><code class="constant">DTV_LNA</code></a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-UNDEFINED"></a><code class="constant">DTV_UNDEFINED</code></h4></div></div></div><p>Used internally. A GET/SET operation for it won't change or return anything.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-TUNE"></a><code class="constant">DTV_TUNE</code></h4></div></div></div><p>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <code class="constant">FE_SET_FRONTEND</code> ioctl.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-CLEAR"></a><code class="constant">DTV_CLEAR</code></h4></div></div></div><p>Reset a cache of data specific to the frontend here. This does not effect hardware.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-FREQUENCY"></a><code class="constant">DTV_FREQUENCY</code></h4></div></div></div><p>Central frequency of the channel.</p><p>Notes:</p><p>1)For satellite delivery systems, it is measured in kHz. 107 For the other ones, it is measured in Hz.</p><p>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz. 108 E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of 109 the channel which is 6MHz.</p><p>3)As in ISDB-Tsb the channel consists of only one or three segments the 110 frequency step is 429kHz, 3*429 respectively. As for ISDB-T the 111 central frequency of the channel is expected.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-MODULATION"></a><code class="constant">DTV_MODULATION</code></h4></div></div></div><p>Specifies the frontend modulation type for delivery systems that supports 112 more than one modulation type. The modulation can be one of the types 113 defined by enum <a class="link" href="frontend-properties.html#fe-modulation" title="Table 9.1. enum fe_modulation">fe_modulation</a>.</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-modulation-t"></a>Modulation property</h5></div></div></div><p>Most of the digital TV standards currently offers more than one possible 114 modulation (sometimes called as "constellation" on some standards). This 115 enum contains the values used by the Kernel. Please note that not all 116 modulations are supported by a given standard.</p><div class="table"><a name="fe-modulation"></a><p class="title"><b>Table 9.1. enum fe_modulation</b></p><div class="table-contents"><table summary="enum fe_modulation" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="QPSK"></a><code class="constant">QPSK</code></td><td valign="top">QPSK modulation</td></tr><tr><td valign="top"><a name="QAM-16"></a><code class="constant">QAM_16</code></td><td valign="top">16-QAM modulation</td></tr><tr><td valign="top"><a name="QAM-32"></a><code class="constant">QAM_32</code></td><td valign="top">32-QAM modulation</td></tr><tr><td valign="top"><a name="QAM-64"></a><code class="constant">QAM_64</code></td><td valign="top">64-QAM modulation</td></tr><tr><td valign="top"><a name="QAM-128"></a><code class="constant">QAM_128</code></td><td valign="top">128-QAM modulation</td></tr><tr><td valign="top"><a name="QAM-256"></a><code class="constant">QAM_256</code></td><td valign="top">256-QAM modulation</td></tr><tr><td valign="top"><a name="QAM-AUTO"></a><code class="constant">QAM_AUTO</code></td><td valign="top">Autodetect QAM modulation</td></tr><tr><td valign="top"><a name="VSB-8"></a><code class="constant">VSB_8</code></td><td valign="top">8-VSB modulation</td></tr><tr><td valign="top"><a name="VSB-16"></a><code class="constant">VSB_16</code></td><td valign="top">16-VSB modulation</td></tr><tr><td valign="top"><a name="PSK-8"></a><code class="constant">PSK_8</code></td><td valign="top">8-PSK modulation</td></tr><tr><td valign="top"><a name="APSK-16"></a><code class="constant">APSK_16</code></td><td valign="top">16-APSK modulation</td></tr><tr><td valign="top"><a name="APSK-32"></a><code class="constant">APSK_32</code></td><td valign="top">32-APSK modulation</td></tr><tr><td valign="top"><a name="DQPSK"></a><code class="constant">DQPSK</code></td><td valign="top">DQPSK modulation</td></tr><tr><td valign="top"><a name="QAM-4-NR"></a><code class="constant">QAM_4_NR</code></td><td valign="top">4-QAM-NR modulation</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-BANDWIDTH-HZ"></a><code class="constant">DTV_BANDWIDTH_HZ</code></h4></div></div></div><p>Bandwidth for the channel, in HZ.</p><p>Possible values: 117 <code class="constant">1712000</code>, 118 <code class="constant">5000000</code>, 119 <code class="constant">6000000</code>, 120 <code class="constant">7000000</code>, 121 <code class="constant">8000000</code>, 122 <code class="constant">10000000</code>. 123 </p><p>Notes:</p><p>1) For ISDB-T it should be always 6000000Hz (6MHz)</p><p>2) For ISDB-Tsb it can vary depending on the number of connected segments</p><p>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth 124 for DVB-C depends on the symbol rate</p><p>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from 125 other parameters (DTV_ISDBT_SB_SEGMENT_IDX, 126 DTV_ISDBT_SB_SEGMENT_COUNT).</p><p>5) DVB-T supports 6, 7 and 8MHz.</p><p>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-INVERSION"></a><code class="constant">DTV_INVERSION</code></h4></div></div></div><p>Specifies if the frontend should do spectral inversion or not.</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-spectral-inversion-t"></a>enum fe_modulation: Frontend spectral inversion</h5></div></div></div><p>This parameter indicates if spectral inversion should be presumed or not. 127 In the automatic setting (<code class="constant">INVERSION_AUTO</code>) the hardware 128 will try to figure out the correct setting by itself. If the hardware 129 doesn't support, the DVB core will try to lock at the carrier first with 130 inversion off. If it fails, it will try to enable inversion. 131</p><div class="table"><a name="fe-spectral-inversion"></a><p class="title"><b>Table 9.2. enum fe_modulation</b></p><div class="table-contents"><table summary="enum fe_modulation" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="INVERSION-OFF"></a><code class="constant">INVERSION_OFF</code></td><td valign="top">Don't do spectral band inversion.</td></tr><tr><td valign="top"><a name="INVERSION-ON"></a><code class="constant">INVERSION_ON</code></td><td valign="top">Do spectral band inversion.</td></tr><tr><td valign="top"><a name="INVERSION-AUTO"></a><code class="constant">INVERSION_AUTO</code></td><td valign="top">Autodetect spectral band inversion.</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-DISEQC-MASTER"></a><code class="constant">DTV_DISEQC_MASTER</code></h4></div></div></div><p>Currently not implemented.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-SYMBOL-RATE"></a><code class="constant">DTV_SYMBOL_RATE</code></h4></div></div></div><p>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-INNER-FEC"></a><code class="constant">DTV_INNER_FEC</code></h4></div></div></div><p>Used cable/satellite transmissions. The acceptable values are: 132 </p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-code-rate-t"></a>enum fe_code_rate: type of the Forward Error Correction.</h5></div></div></div><div class="table"><a name="fe-code-rate"></a><p class="title"><b>Table 9.3. enum fe_code_rate</b></p><div class="table-contents"><table summary="enum fe_code_rate" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="FEC-NONE"></a><code class="constant">FEC_NONE</code></td><td valign="top">No Forward Error Correction Code</td></tr><tr><td valign="top"><a name="FEC-AUTO"></a><code class="constant">FEC_AUTO</code></td><td valign="top">Autodetect Error Correction Code</td></tr><tr><td valign="top"><a name="FEC-1-2"></a><code class="constant">FEC_1_2</code></td><td valign="top">Forward Error Correction Code 1/2</td></tr><tr><td valign="top"><a name="FEC-2-3"></a><code class="constant">FEC_2_3</code></td><td valign="top">Forward Error Correction Code 2/3</td></tr><tr><td valign="top"><a name="FEC-3-4"></a><code class="constant">FEC_3_4</code></td><td valign="top">Forward Error Correction Code 3/4</td></tr><tr><td valign="top"><a name="FEC-4-5"></a><code class="constant">FEC_4_5</code></td><td valign="top">Forward Error Correction Code 4/5</td></tr><tr><td valign="top"><a name="FEC-5-6"></a><code class="constant">FEC_5_6</code></td><td valign="top">Forward Error Correction Code 5/6</td></tr><tr><td valign="top"><a name="FEC-6-7"></a><code class="constant">FEC_6_7</code></td><td valign="top">Forward Error Correction Code 6/7</td></tr><tr><td valign="top"><a name="FEC-7-8"></a><code class="constant">FEC_7_8</code></td><td valign="top">Forward Error Correction Code 7/8</td></tr><tr><td valign="top"><a name="FEC-8-9"></a><code class="constant">FEC_8_9</code></td><td valign="top">Forward Error Correction Code 8/9</td></tr><tr><td valign="top"><a name="FEC-9-10"></a><code class="constant">FEC_9_10</code></td><td valign="top">Forward Error Correction Code 9/10</td></tr><tr><td valign="top"><a name="FEC-2-5"></a><code class="constant">FEC_2_5</code></td><td valign="top">Forward Error Correction Code 2/5</td></tr><tr><td valign="top"><a name="FEC-3-5"></a><code class="constant">FEC_3_5</code></td><td valign="top">Forward Error Correction Code 3/5</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-VOLTAGE"></a><code class="constant">DTV_VOLTAGE</code></h4></div></div></div><p>The voltage is usually used with non-DiSEqC capable LNBs to switch 133 the polarzation (horizontal/vertical). When using DiSEqC epuipment this 134 voltage has to be switched consistently to the DiSEqC commands as 135 described in the DiSEqC spec.</p><div class="table"><a name="fe-sec-voltage"></a><p class="title"><b>Table 9.4. enum fe_sec_voltage</b></p><div class="table-contents"><table summary="enum fe_sec_voltage" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td align="char" valign="top"><a name="SEC-VOLTAGE-13"></a><code class="constant">SEC_VOLTAGE_13</code></td><td align="char" valign="top">Set DC voltage level to 13V</td></tr><tr><td align="char" valign="top"><a name="SEC-VOLTAGE-18"></a><code class="constant">SEC_VOLTAGE_18</code></td><td align="char" valign="top">Set DC voltage level to 18V</td></tr><tr><td align="char" valign="top"><a name="SEC-VOLTAGE-OFF"></a><code class="constant">SEC_VOLTAGE_OFF</code></td><td align="char" valign="top">Don't send any voltage to the antenna</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-TONE"></a><code class="constant">DTV_TONE</code></h4></div></div></div><p>Currently not used.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-PILOT"></a><code class="constant">DTV_PILOT</code></h4></div></div></div><p>Sets DVB-S2 pilot</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-pilot-t"></a>fe_pilot type</h5></div></div></div><div class="table"><a name="fe-pilot"></a><p class="title"><b>Table 9.5. enum fe_pilot</b></p><div class="table-contents"><table summary="enum fe_pilot" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td align="char" valign="top"><a name="PILOT-ON"></a><code class="constant">PILOT_ON</code></td><td align="char" valign="top">Pilot tones enabled</td></tr><tr><td align="char" valign="top"><a name="PILOT-OFF"></a><code class="constant">PILOT_OFF</code></td><td align="char" valign="top">Pilot tones disabled</td></tr><tr><td align="char" valign="top"><a name="PILOT-AUTO"></a><code class="constant">PILOT_AUTO</code></td><td align="char" valign="top">Autodetect pilot tones</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ROLLOFF"></a><code class="constant">DTV_ROLLOFF</code></h4></div></div></div><p>Sets DVB-S2 rolloff</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-rolloff-t"></a>fe_rolloff type</h5></div></div></div><div class="table"><a name="fe-rolloff"></a><p class="title"><b>Table 9.6. enum fe_rolloff</b></p><div class="table-contents"><table summary="enum fe_rolloff" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td align="char" valign="top"><a name="ROLLOFF-35"></a><code class="constant">ROLLOFF_35</code></td><td align="char" valign="top">Roloff factor: α=35%</td></tr><tr><td align="char" valign="top"><a name="ROLLOFF-20"></a><code class="constant">ROLLOFF_20</code></td><td align="char" valign="top">Roloff factor: α=20%</td></tr><tr><td align="char" valign="top"><a name="ROLLOFF-25"></a><code class="constant">ROLLOFF_25</code></td><td align="char" valign="top">Roloff factor: α=25%</td></tr><tr><td align="char" valign="top"><a name="ROLLOFF-AUTO"></a><code class="constant">ROLLOFF_AUTO</code></td><td align="char" valign="top">Auto-detect the roloff factor.</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-DISEQC-SLAVE-REPLY"></a><code class="constant">DTV_DISEQC_SLAVE_REPLY</code></h4></div></div></div><p>Currently not implemented.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-FE-CAPABILITY-COUNT"></a><code class="constant">DTV_FE_CAPABILITY_COUNT</code></h4></div></div></div><p>Currently not implemented.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-FE-CAPABILITY"></a><code class="constant">DTV_FE_CAPABILITY</code></h4></div></div></div><p>Currently not implemented.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-DELIVERY-SYSTEM"></a><code class="constant">DTV_DELIVERY_SYSTEM</code></h4></div></div></div><p>Specifies the type of Delivery system</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-delivery-system-t"></a>fe_delivery_system type</h5></div></div></div><p>Possible values: </p><div class="table"><a name="fe-delivery-system"></a><p class="title"><b>Table 9.7. enum fe_delivery_system</b></p><div class="table-contents"><table summary="enum fe_delivery_system" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="SYS-UNDEFINED"></a><code class="constant">SYS_UNDEFINED</code></td><td valign="top">Undefined standard. Generally, indicates an error</td></tr><tr><td valign="top"><a name="SYS-DVBC-ANNEX-A"></a><code class="constant">SYS_DVBC_ANNEX_A</code></td><td valign="top">Cable TV: DVB-C following ITU-T J.83 Annex A spec</td></tr><tr><td valign="top"><a name="SYS-DVBC-ANNEX-B"></a><code class="constant">SYS_DVBC_ANNEX_B</code></td><td valign="top">Cable TV: DVB-C following ITU-T J.83 Annex B spec (ClearQAM)</td></tr><tr><td valign="top"><a name="SYS-DVBC-ANNEX-C"></a><code class="constant">SYS_DVBC_ANNEX_C</code></td><td valign="top">Cable TV: DVB-C following ITU-T J.83 Annex C spec</td></tr><tr><td valign="top"><a name="SYS-ISDBC"></a><code class="constant">SYS_ISDBC</code></td><td valign="top">Cable TV: ISDB-C (no drivers yet)</td></tr><tr><td valign="top"><a name="SYS-DVBT"></a><code class="constant">SYS_DVBT</code></td><td valign="top">Terrestral TV: DVB-T</td></tr><tr><td valign="top"><a name="SYS-DVBT2"></a><code class="constant">SYS_DVBT2</code></td><td valign="top">Terrestral TV: DVB-T2</td></tr><tr><td valign="top"><a name="SYS-ISDBT"></a><code class="constant">SYS_ISDBT</code></td><td valign="top">Terrestral TV: ISDB-T</td></tr><tr><td valign="top"><a name="SYS-ATSC"></a><code class="constant">SYS_ATSC</code></td><td valign="top">Terrestral TV: ATSC</td></tr><tr><td valign="top"><a name="SYS-ATSCMH"></a><code class="constant">SYS_ATSCMH</code></td><td valign="top">Terrestral TV (mobile): ATSC-M/H</td></tr><tr><td valign="top"><a name="SYS-DTMB"></a><code class="constant">SYS_DTMB</code></td><td valign="top">Terrestrial TV: DTMB</td></tr><tr><td valign="top"><a name="SYS-DVBS"></a><code class="constant">SYS_DVBS</code></td><td valign="top">Satellite TV: DVB-S</td></tr><tr><td valign="top"><a name="SYS-DVBS2"></a><code class="constant">SYS_DVBS2</code></td><td valign="top">Satellite TV: DVB-S2</td></tr><tr><td valign="top"><a name="SYS-TURBO"></a><code class="constant">SYS_TURBO</code></td><td valign="top">Satellite TV: DVB-S Turbo</td></tr><tr><td valign="top"><a name="SYS-ISDBS"></a><code class="constant">SYS_ISDBS</code></td><td valign="top">Satellite TV: ISDB-S</td></tr><tr><td valign="top"><a name="SYS-DAB"></a><code class="constant">SYS_DAB</code></td><td valign="top">Digital audio: DAB (not fully supported)</td></tr><tr><td valign="top"><a name="SYS-DSS"></a><code class="constant">SYS_DSS</code></td><td valign="top">Satellite TV:"DSS (not fully supported)</td></tr><tr><td valign="top"><a name="SYS-CMMB"></a><code class="constant">SYS_CMMB</code></td><td valign="top">Terrestral TV (mobile):CMMB (not fully supported)</td></tr><tr><td valign="top"><a name="SYS-DVBH"></a><code class="constant">SYS_DVBH</code></td><td valign="top">Terrestral TV (mobile): DVB-H (standard deprecated)</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ISDBT-PARTIAL-RECEPTION"></a><code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code></h4></div></div></div><p>If <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> is '0' this bit-field represents whether 136 the channel is in partial reception mode or not.</p><p>If '1' <code class="constant">DTV_ISDBT_LAYERA_*</code> values are assigned to the center segment and 137 <code class="constant">DTV_ISDBT_LAYERA_SEGMENT_COUNT</code> has to be '1'.</p><p>If in addition <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> is '1' 138 <code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code> represents whether this ISDB-Tsb channel 139 is consisting of one segment and layer or three segments and two layers.</p><p>Possible values: 0, 1, -1 (AUTO)</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ISDBT-SOUND-BROADCASTING"></a><code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code></h4></div></div></div><p>This field represents whether the other DTV_ISDBT_*-parameters are 140 referring to an ISDB-T and an ISDB-Tsb channel. (See also 141 <code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code>).</p><p>Possible values: 0, 1, -1 (AUTO)</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ISDBT-SB-SUBCHANNEL-ID"></a><code class="constant">DTV_ISDBT_SB_SUBCHANNEL_ID</code></h4></div></div></div><p>This field only applies if <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> is '1'.</p><p>(Note of the author: This might not be the correct description of the 142 <code class="constant">SUBCHANNEL-ID</code> in all details, but it is my understanding of the technical 143 background needed to program a device)</p><p>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a 144 set of connected ISDB-Tsb channels. In this set of channels every 145 channel can be received independently. The number of connected 146 ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum 147 bandwidth available.</p><p>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The 148 broadcaster has several possibilities to put those channels in the 149 air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8 150 segments from position 1-8 to 5-13 or anything in between.</p><p>The underlying layer of segments are subchannels: each segment is 151 consisting of several subchannels with a predefined IDs. A sub-channel 152 is used to help the demodulator to synchronize on the channel.</p><p>An ISDB-T channel is always centered over all sub-channels. As for 153 the example above, in ISDB-Tsb it is no longer as simple as that.</p><p><code class="constant">The DTV_ISDBT_SB_SUBCHANNEL_ID</code> parameter is used to give the 154 sub-channel ID of the segment to be demodulated.</p><p>Possible values: 0 .. 41, -1 (AUTO)</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ISDBT-SB-SEGMENT-IDX"></a><code class="constant">DTV_ISDBT_SB_SEGMENT_IDX</code></h4></div></div></div><p>This field only applies if <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> is '1'.</p><p><code class="constant">DTV_ISDBT_SB_SEGMENT_IDX</code> gives the index of the segment to be 155 demodulated for an ISDB-Tsb channel where several of them are 156 transmitted in the connected manner.</p><p>Possible values: 0 .. <code class="constant">DTV_ISDBT_SB_SEGMENT_COUNT</code> - 1</p><p>Note: This value cannot be determined by an automatic channel search.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ISDBT-SB-SEGMENT-COUNT"></a><code class="constant">DTV_ISDBT_SB_SEGMENT_COUNT</code></h4></div></div></div><p>This field only applies if <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> is '1'.</p><p><code class="constant">DTV_ISDBT_SB_SEGMENT_COUNT</code> gives the total count of connected ISDB-Tsb 157 channels.</p><p>Possible values: 1 .. 13</p><p>Note: This value cannot be determined by an automatic channel search.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="isdb-hierq-layers"></a><code class="constant">DTV-ISDBT-LAYER*</code> parameters</h4></div></div></div><p>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in 158 ISDB-T hierarchical layers can be decoded simultaneously. For that 159 reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</p><p>ISDB-T has 3 hierarchical layers which each can use a part of the 160 available segments. The total number of segments over all layers has 161 to 13 in ISDB-T.</p><p>There are 3 parameter sets, for Layers A, B and C.</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ISDBT-LAYER-ENABLED"></a><code class="constant">DTV_ISDBT_LAYER_ENABLED</code></h5></div></div></div><p>Hierarchical reception in ISDB-T is achieved by enabling or disabling 162 layers in the decoding process. Setting all bits of 163 <code class="constant">DTV_ISDBT_LAYER_ENABLED</code> to '1' forces all layers (if applicable) to be 164 demodulated. This is the default.</p><p>If the channel is in the partial reception mode 165 (<code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code> = 1) the central segment can be decoded 166 independently of the other 12 segments. In that mode layer A has to 167 have a <code class="constant">SEGMENT_COUNT</code> of 1.</p><p>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb 168 according to <code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code>. <code class="constant">SEGMENT_COUNT</code> must be filled 169 accordingly.</p><p>Possible values: 0x1, 0x2, 0x4 (|-able)</p><p><code class="constant">DTV_ISDBT_LAYER_ENABLED[0:0]</code> - layer A</p><p><code class="constant">DTV_ISDBT_LAYER_ENABLED[1:1]</code> - layer B</p><p><code class="constant">DTV_ISDBT_LAYER_ENABLED[2:2]</code> - layer C</p><p><code class="constant">DTV_ISDBT_LAYER_ENABLED[31:3]</code> unused</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ISDBT-LAYER-FEC"></a><code class="constant">DTV_ISDBT_LAYER*_FEC</code></h5></div></div></div><p>Possible values: <code class="constant">FEC_AUTO</code>, <code class="constant">FEC_1_2</code>, <code class="constant">FEC_2_3</code>, <code class="constant">FEC_3_4</code>, <code class="constant">FEC_5_6</code>, <code class="constant">FEC_7_8</code></p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ISDBT-LAYER-MODULATION"></a><code class="constant">DTV_ISDBT_LAYER*_MODULATION</code></h5></div></div></div><p>Possible values: <code class="constant">QAM_AUTO</code>, QP<code class="constant">SK, QAM_16</code>, <code class="constant">QAM_64</code>, <code class="constant">DQPSK</code></p><p>Note: If layer C is <code class="constant">DQPSK</code> layer B has to be <code class="constant">DQPSK</code>. If layer B is <code class="constant">DQPSK</code> 170 and <code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code>=0 layer has to be <code class="constant">DQPSK</code>.</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ISDBT-LAYER-SEGMENT-COUNT"></a><code class="constant">DTV_ISDBT_LAYER*_SEGMENT_COUNT</code></h5></div></div></div><p>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</p><p>Note: Truth table for <code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code> and 171 <code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code> and <code class="constant">LAYER</code>*_SEGMENT_COUNT</p><div class="informaltable"><a name="isdbt-layer_seg-cnt-table"></a><table border="1"><colgroup><col><col><col><col><col><col></colgroup><tbody><tr><td>PR</td><td>SB</td><td>Layer A width</td><td>Layer B width</td><td>Layer C width</td><td>total width</td></tr><tr><td>0</td><td>0</td><td>1 .. 13</td><td>1 .. 13</td><td>1 .. 13</td><td>13</td></tr><tr><td>1</td><td>0</td><td>1</td><td>1 .. 13</td><td>1 .. 13</td><td>13</td></tr><tr><td>0</td><td>1</td><td>1</td><td>0</td><td>0</td><td>1</td></tr><tr><td>1</td><td>1</td><td>1</td><td>2</td><td>0</td><td>13</td></tr></tbody></table></div></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ISDBT-LAYER-TIME-INTERLEAVING"></a><code class="constant">DTV_ISDBT_LAYER*_TIME_INTERLEAVING</code></h5></div></div></div><p>Valid values: 0, 1, 2, 4, -1 (AUTO)</p><p>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</p><p>Note: The real time interleaving length depends on the mode (fft-size). The values 172 here are referring to what can be found in the TMCC-structure, as shown in the table below.</p><div class="informaltable"><a name="isdbt-layer-interleaving-table"></a><table border="1"><colgroup><col><col><col><col></colgroup><tbody><tr><td align="center">DTV_ISDBT_LAYER*_TIME_INTERLEAVING</td><td align="center">Mode 1 (2K FFT)</td><td align="center">Mode 2 (4K FFT)</td><td align="center">Mode 3 (8K FFT)</td></tr><tr><td align="center">0</td><td align="center">0</td><td align="center">0</td><td align="center">0</td></tr><tr><td align="center">1</td><td align="center">4</td><td align="center">2</td><td align="center">1</td></tr><tr><td align="center">2</td><td align="center">8</td><td align="center">4</td><td align="center">2</td></tr><tr><td align="center">4</td><td align="center">16</td><td align="center">8</td><td align="center">4</td></tr></tbody></table></div></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-FIC-VER"></a><code class="constant">DTV_ATSCMH_FIC_VER</code></h5></div></div></div><p>Version number of the FIC (Fast Information Channel) signaling data.</p><p>FIC is used for relaying information to allow rapid service acquisition by the receiver.</p><p>Possible values: 0, 1, 2, 3, ..., 30, 31</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-PARADE-ID"></a><code class="constant">DTV_ATSCMH_PARADE_ID</code></h5></div></div></div><p>Parade identification number</p><p>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</p><p>Possible values: 0, 1, 2, 3, ..., 126, 127</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-NOG"></a><code class="constant">DTV_ATSCMH_NOG</code></h5></div></div></div><p>Number of MH groups per MH subframe for a designated parade.</p><p>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-TNOG"></a><code class="constant">DTV_ATSCMH_TNOG</code></h5></div></div></div><p>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</p><p>Possible values: 0, 1, 2, 3, ..., 30, 31</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SGN"></a><code class="constant">DTV_ATSCMH_SGN</code></h5></div></div></div><p>Start group number.</p><p>Possible values: 0, 1, 2, 3, ..., 14, 15</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-PRC"></a><code class="constant">DTV_ATSCMH_PRC</code></h5></div></div></div><p>Parade repetition cycle.</p><p>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-RS-FRAME-MODE"></a><code class="constant">DTV_ATSCMH_RS_FRAME_MODE</code></h5></div></div></div><p>Reed Solomon (RS) frame mode.</p><p>Possible values are:</p><div class="table"><a name="atscmh-rs-frame-mode"></a><p class="title"><b>Table 9.8. enum atscmh_rs_frame_mode</b></p><div class="table-contents"><table summary="enum atscmh_rs_frame_mode" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="ATSCMH-RSFRAME-PRI-ONLY"></a><code class="constant">ATSCMH_RSFRAME_PRI_ONLY</code></td><td valign="top">Single Frame: There is only a primary RS Frame for all 173 Group Regions.</td></tr><tr><td valign="top"><a name="ATSCMH-RSFRAME-PRI-SEC"></a><code class="constant">ATSCMH_RSFRAME_PRI_SEC</code></td><td valign="top">Dual Frame: There are two separate RS Frames: Primary RS 174 Frame for Group Region A and B and Secondary RS Frame for Group 175 Region C and D.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-RS-FRAME-ENSEMBLE"></a><code class="constant">DTV_ATSCMH_RS_FRAME_ENSEMBLE</code></h5></div></div></div><p>Reed Solomon(RS) frame ensemble.</p><p>Possible values are:</p><div class="table"><a name="atscmh-rs-frame-ensemble"></a><p class="title"><b>Table 9.9. enum atscmh_rs_frame_ensemble</b></p><div class="table-contents"><table summary="enum atscmh_rs_frame_ensemble" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="ATSCMH-RSFRAME-ENS-PRI"></a><code class="constant">ATSCMH_RSFRAME_ENS_PRI</code></td><td valign="top">Primary Ensemble.</td></tr><tr><td valign="top"><a name="ATSCMH-RSFRAME-ENS-SEC"></a><code class="constant">AATSCMH_RSFRAME_PRI_SEC</code></td><td valign="top">Secondary Ensemble.</td></tr><tr><td valign="top"><a name="ATSCMH-RSFRAME-RES"></a><code class="constant">AATSCMH_RSFRAME_RES</code></td><td valign="top">Reserved. Shouldn't be used.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-RS-CODE-MODE-PRI"></a><code class="constant">DTV_ATSCMH_RS_CODE_MODE_PRI</code></h5></div></div></div><p>Reed Solomon (RS) code mode (primary).</p><p>Possible values are:</p><div class="table"><a name="atscmh-rs-code-mode"></a><p class="title"><b>Table 9.10. enum atscmh_rs_code_mode</b></p><div class="table-contents"><table summary="enum atscmh_rs_code_mode" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="ATSCMH-RSCODE-211-187"></a><code class="constant">ATSCMH_RSCODE_211_187</code></td><td valign="top">Reed Solomon code (211,187).</td></tr><tr><td valign="top"><a name="ATSCMH-RSCODE-223-187"></a><code class="constant">ATSCMH_RSCODE_223_187</code></td><td valign="top">Reed Solomon code (223,187).</td></tr><tr><td valign="top"><a name="ATSCMH-RSCODE-235-187"></a><code class="constant">ATSCMH_RSCODE_235_187</code></td><td valign="top">Reed Solomon code (235,187).</td></tr><tr><td valign="top"><a name="ATSCMH-RSCODE-RES"></a><code class="constant">ATSCMH_RSCODE_RES</code></td><td valign="top">Reserved. Shouldn't be used.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-RS-CODE-MODE-SEC"></a><code class="constant">DTV_ATSCMH_RS_CODE_MODE_SEC</code></h5></div></div></div><p>Reed Solomon (RS) code mode (secondary).</p><p>Possible values are the same as documented on 176 enum <a class="link" href="frontend-properties.html#atscmh-rs-code-mode" title="Table 9.10. enum atscmh_rs_code_mode">atscmh_rs_code_mode</a>:</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SCCC-BLOCK-MODE"></a><code class="constant">DTV_ATSCMH_SCCC_BLOCK_MODE</code></h5></div></div></div><p>Series Concatenated Convolutional Code Block Mode.</p><p>Possible values are:</p><div class="table"><a name="atscmh-sccc-block-mode"></a><p class="title"><b>Table 9.11. enum atscmh_scc_block_mode</b></p><div class="table-contents"><table summary="enum atscmh_scc_block_mode" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="ATSCMH-SCCC-BLK-SEP"></a><code class="constant">ATSCMH_SCCC_BLK_SEP</code></td><td valign="top">Separate SCCC: the SCCC outer code mode shall be set independently 177 for each Group Region (A, B, C, D)</td></tr><tr><td valign="top"><a name="ATSCMH-SCCC-BLK-COMB"></a><code class="constant">ATSCMH_SCCC_BLK_COMB</code></td><td valign="top">Combined SCCC: all four Regions shall have the same SCCC outer 178 code mode.</td></tr><tr><td valign="top"><a name="ATSCMH-SCCC-BLK-RES"></a><code class="constant">ATSCMH_SCCC_BLK_RES</code></td><td valign="top">Reserved. Shouldn't be used.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SCCC-CODE-MODE-A"></a><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_A</code></h5></div></div></div><p>Series Concatenated Convolutional Code Rate.</p><p>Possible values are:</p><div class="table"><a name="atscmh-sccc-code-mode"></a><p class="title"><b>Table 9.12. enum atscmh_sccc_code_mode</b></p><div class="table-contents"><table summary="enum atscmh_sccc_code_mode" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="ATSCMH-SCCC-CODE-HLF"></a><code class="constant">ATSCMH_SCCC_CODE_HLF</code></td><td valign="top">The outer code rate of a SCCC Block is 1/2 rate.</td></tr><tr><td valign="top"><a name="ATSCMH-SCCC-CODE-QTR"></a><code class="constant">ATSCMH_SCCC_CODE_QTR</code></td><td valign="top">The outer code rate of a SCCC Block is 1/4 rate.</td></tr><tr><td valign="top"><a name="ATSCMH-SCCC-CODE-RES"></a><code class="constant">ATSCMH_SCCC_CODE_RES</code></td><td valign="top">to be documented.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SCCC-CODE-MODE-B"></a><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_B</code></h5></div></div></div><p>Series Concatenated Convolutional Code Rate.</p><p>Possible values are the same as documented on 179 enum <a class="link" href="frontend-properties.html#atscmh-sccc-code-mode" title="Table 9.12. enum atscmh_sccc_code_mode">atscmh_sccc_code_mode</a>.</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SCCC-CODE-MODE-C"></a><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_C</code></h5></div></div></div><p>Series Concatenated Convolutional Code Rate.</p><p>Possible values are the same as documented on 180 enum <a class="link" href="frontend-properties.html#atscmh-sccc-code-mode" title="Table 9.12. enum atscmh_sccc_code_mode">atscmh_sccc_code_mode</a>.</p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="DTV-ATSCMH-SCCC-CODE-MODE-D"></a><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_D</code></h5></div></div></div><p>Series Concatenated Convolutional Code Rate.</p><p>Possible values are the same as documented on 181 enum <a class="link" href="frontend-properties.html#atscmh-sccc-code-mode" title="Table 9.12. enum atscmh_sccc_code_mode">atscmh_sccc_code_mode</a>.</p></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-API-VERSION"></a><code class="constant">DTV_API_VERSION</code></h4></div></div></div><p>Returns the major/minor version of the DVB API</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-CODE-RATE-HP"></a><code class="constant">DTV_CODE_RATE_HP</code></h4></div></div></div><p>Used on terrestrial transmissions. The acceptable values are 182 the ones described at <a class="link" href="frontend-properties.html#fe-transmit-mode-t" title="enum fe_transmit_mode: Number of carriers per channel">fe_transmit_mode_t</a>. 183 </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-CODE-RATE-LP"></a><code class="constant">DTV_CODE_RATE_LP</code></h4></div></div></div><p>Used on terrestrial transmissions. The acceptable values are 184 the ones described at <a class="link" href="frontend-properties.html#fe-transmit-mode-t" title="enum fe_transmit_mode: Number of carriers per channel">fe_transmit_mode_t</a>. 185 </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-GUARD-INTERVAL"></a><code class="constant">DTV_GUARD_INTERVAL</code></h4></div></div></div><p>Possible values are:</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-guard-interval-t"></a>Modulation guard interval</h5></div></div></div><div class="table"><a name="fe-guard-interval"></a><p class="title"><b>Table 9.13. enum fe_guard_interval</b></p><div class="table-contents"><table summary="enum fe_guard_interval" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="GUARD-INTERVAL-AUTO"></a><code class="constant">GUARD_INTERVAL_AUTO</code></td><td valign="top">Autodetect the guard interval</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-1-128"></a><code class="constant">GUARD_INTERVAL_1_128</code></td><td valign="top">Guard interval 1/128</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-1-32"></a><code class="constant">GUARD_INTERVAL_1_32</code></td><td valign="top">Guard interval 1/32</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-1-16"></a><code class="constant">GUARD_INTERVAL_1_16</code></td><td valign="top">Guard interval 1/16</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-1-8"></a><code class="constant">GUARD_INTERVAL_1_8</code></td><td valign="top">Guard interval 1/8</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-1-4"></a><code class="constant">GUARD_INTERVAL_1_4</code></td><td valign="top">Guard interval 1/4</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-19-128"></a><code class="constant">GUARD_INTERVAL_19_128</code></td><td valign="top">Guard interval 19/128</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-19-256"></a><code class="constant">GUARD_INTERVAL_19_256</code></td><td valign="top">Guard interval 19/256</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-PN420"></a><code class="constant">GUARD_INTERVAL_PN420</code></td><td valign="top">PN length 420 (1/4)</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-PN595"></a><code class="constant">GUARD_INTERVAL_PN595</code></td><td valign="top">PN length 595 (1/6)</td></tr><tr><td valign="top"><a name="GUARD-INTERVAL-PN945"></a><code class="constant">GUARD_INTERVAL_PN945</code></td><td valign="top">PN length 945 (1/9)</td></tr></tbody></table></div></div><br class="table-break"><p>Notes:</p><p>1) If <code class="constant">DTV_GUARD_INTERVAL</code> is set the <code class="constant">GUARD_INTERVAL_AUTO</code> the hardware will 186 try to find the correct guard interval (if capable) and will use TMCC to fill 187 in the missing parameters.</p><p>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</p><p>3) DTMB specifies PN420, PN595 and PN945.</p></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-TRANSMISSION-MODE"></a><code class="constant">DTV_TRANSMISSION_MODE</code></h4></div></div></div><p>Specifies the number of carriers used by the standard. 188 This is used only on OFTM-based standards, e. g. 189 DVB-T/T2, ISDB-T, DTMB</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-transmit-mode-t"></a>enum fe_transmit_mode: Number of carriers per channel</h5></div></div></div><div class="table"><a name="fe-transmit-mode"></a><p class="title"><b>Table 9.14. enum fe_transmit_mode</b></p><div class="table-contents"><table summary="enum fe_transmit_mode" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="TRANSMISSION-MODE-AUTO"></a><code class="constant">TRANSMISSION_MODE_AUTO</code></td><td valign="top">Autodetect transmission mode. The hardware will try to find 190 the correct FFT-size (if capable) to fill in the missing 191 parameters.</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-1K"></a><code class="constant">TRANSMISSION_MODE_1K</code></td><td valign="top">Transmission mode 1K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-2K"></a><code class="constant">TRANSMISSION_MODE_2K</code></td><td valign="top">Transmission mode 2K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-8K"></a><code class="constant">TRANSMISSION_MODE_8K</code></td><td valign="top">Transmission mode 8K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-4K"></a><code class="constant">TRANSMISSION_MODE_4K</code></td><td valign="top">Transmission mode 4K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-16K"></a><code class="constant">TRANSMISSION_MODE_16K</code></td><td valign="top">Transmission mode 16K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-32K"></a><code class="constant">TRANSMISSION_MODE_32K</code></td><td valign="top">Transmission mode 32K</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-C1"></a><code class="constant">TRANSMISSION_MODE_C1</code></td><td valign="top">Single Carrier (C=1) transmission mode (DTMB)</td></tr><tr><td valign="top"><a name="TRANSMISSION-MODE-C3780"></a><code class="constant">TRANSMISSION_MODE_C3780</code></td><td valign="top">Multi Carrier (C=3780) transmission mode (DTMB)</td></tr></tbody></table></div></div><br class="table-break"><p>Notes:</p><p>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called 192 'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</p><p>2) If <code class="constant">DTV_TRANSMISSION_MODE</code> is set the <code class="constant">TRANSMISSION_MODE_AUTO</code> the 193 hardware will try to find the correct FFT-size (if capable) and will 194 use TMCC to fill in the missing parameters.</p><p>3) DVB-T specifies 2K and 8K as valid sizes.</p><p>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</p><p>5) DTMB specifies C1 and C3780.</p></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-HIERARCHY"></a><code class="constant">DTV_HIERARCHY</code></h4></div></div></div><p>Frontend hierarchy</p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a name="fe-hierarchy-t"></a>Frontend hierarchy</h5></div></div></div><div class="table"><a name="fe-hierarchy"></a><p class="title"><b>Table 9.15. enum fe_hierarchy</b></p><div class="table-contents"><table summary="enum fe_hierarchy" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="HIERARCHY-NONE"></a><code class="constant">HIERARCHY_NONE</code></td><td valign="top">No hierarchy</td></tr><tr><td valign="top"><a name="HIERARCHY-AUTO"></a><code class="constant">HIERARCHY_AUTO</code></td><td valign="top">Autodetect hierarchy (if supported)</td></tr><tr><td valign="top"><a name="HIERARCHY-1"></a><code class="constant">HIERARCHY_1</code></td><td valign="top">Hierarchy 1</td></tr><tr><td valign="top"><a name="HIERARCHY-2"></a><code class="constant">HIERARCHY_2</code></td><td valign="top">Hierarchy 2</td></tr><tr><td valign="top"><a name="HIERARCHY-4"></a><code class="constant">HIERARCHY_4</code></td><td valign="top">Hierarchy 4</td></tr></tbody></table></div></div><br class="table-break"></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STREAM-ID"></a><code class="constant">DTV_STREAM_ID</code></h4></div></div></div><p>DVB-S2, DVB-T2 and ISDB-S support the transmission of several 195 streams on a single transport stream. 196 This property enables the DVB driver to handle substream filtering, 197 when supported by the hardware. 198 By default, substream filtering is disabled. 199 </p><p> 200 For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. 201 </p><p> 202 For ISDB, the valid substream id range is from 1 to 65535. 203 </p><p> 204 To disable it, you should use the special macro NO_STREAM_ID_FILTER. 205 </p><p> 206 Note: any value outside the id range also disables filtering. 207 </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-DVBT2-PLP-ID-LEGACY"></a><code class="constant">DTV_DVBT2_PLP_ID_LEGACY</code></h4></div></div></div><p>Obsolete, replaced with DTV_STREAM_ID.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-ENUM-DELSYS"></a><code class="constant">DTV_ENUM_DELSYS</code></h4></div></div></div><p>A Multi standard frontend needs to advertise the delivery systems provided. 208 Applications need to enumerate the provided delivery systems, before using 209 any other operation with the frontend. Prior to it's introduction, 210 FE_GET_INFO was used to determine a frontend type. A frontend which 211 provides more than a single delivery system, FE_GET_INFO doesn't help much. 212 Applications which intends to use a multistandard frontend must enumerate 213 the delivery systems associated with it, rather than trying to use 214 FE_GET_INFO. In the case of a legacy frontend, the result is just the same 215 as with FE_GET_INFO, but in a more structured format </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-INTERLEAVING"></a><code class="constant">DTV_INTERLEAVING</code></h4></div></div></div><p>Time interleaving to be used. Currently, used only on DTMB.</p><div class="table"><a name="fe-interleaving"></a><p class="title"><b>Table 9.16. enum fe_interleaving</b></p><div class="table-contents"><table summary="enum fe_interleaving" width="100%" border="0"><colgroup><col class="c1"><col class="c2"></colgroup><thead><tr><th>ID</th><th>Description</th></tr></thead><tbody valign="top"><tr><td valign="top"><a name="INTERLEAVING-NONE"></a><code class="constant">INTERLEAVING_NONE</code></td><td valign="top">No interleaving.</td></tr><tr><td valign="top"><a name="INTERLEAVING-AUTO"></a><code class="constant">INTERLEAVING_AUTO</code></td><td valign="top">Auto-detect interleaving.</td></tr><tr><td valign="top"><a name="INTERLEAVING-240"></a><code class="constant">INTERLEAVING_240</code></td><td valign="top">Interleaving of 240 symbols.</td></tr><tr><td valign="top"><a name="INTERLEAVING-720"></a><code class="constant">INTERLEAVING_720</code></td><td valign="top">Interleaving of 720 symbols.</td></tr></tbody></table></div></div><br class="table-break"></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-LNA"></a><code class="constant">DTV_LNA</code></h4></div></div></div><p>Low-noise amplifier.</p><p>Hardware might offer controllable LNA which can be set manually 216 using that parameter. Usually LNA could be found only from 217 terrestrial devices if at all.</p><p>Possible values: 0, 1, LNA_AUTO</p><p>0, LNA off</p><p>1, LNA on</p><p>use the special macro LNA_AUTO to set LNA auto</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="frontend-stat-properties"></a>Frontend statistics indicators</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-SIGNAL-STRENGTH"><code class="constant">DTV_STAT_SIGNAL_STRENGTH</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-CNR"><code class="constant">DTV_STAT_CNR</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-PRE-ERROR-BIT-COUNT"><code class="constant">DTV_STAT_PRE_ERROR_BIT_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-PRE-TOTAL-BIT-COUNT"><code class="constant">DTV_STAT_PRE_TOTAL_BIT_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-POST-ERROR-BIT-COUNT"><code class="constant">DTV_STAT_POST_ERROR_BIT_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-POST-TOTAL-BIT-COUNT"><code class="constant">DTV_STAT_POST_TOTAL_BIT_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-ERROR-BLOCK-COUNT"><code class="constant">DTV_STAT_ERROR_BLOCK_COUNT</code></a></span></dt><dt><span class="section"><a href="frontend-properties.html#DTV-STAT-TOTAL-BLOCK-COUNT"><code class="constant">DTV-STAT_TOTAL_BLOCK_COUNT</code></a></span></dt></dl></div><p>The values are returned via <code class="constant">dtv_property.stat</code>. 218 If the property is supported, <code class="constant">dtv_property.stat.len</code> is bigger than zero.</p><p>For most delivery systems, <code class="constant">dtv_property.stat.len</code> 219 will be 1 if the stats is supported, and the properties will 220 return a single value for each parameter.</p><p>It should be noted, however, that new OFDM delivery systems 221 like ISDB can use different modulation types for each group of 222 carriers. On such standards, up to 3 groups of statistics can be 223 provided, and <code class="constant">dtv_property.stat.len</code> is updated 224 to reflect the "global" metrics, plus one metric per each carrier 225 group (called "layer" on ISDB).</p><p>So, in order to be consistent with other delivery systems, the first 226 value at <a class="link" href="frontend-properties.html#dtv-stats" title="struct dtv_stats"><code class="constant">dtv_property.stat.dtv_stats</code></a> 227 array refers to the global metric. The other elements of the array 228 represent each layer, starting from layer A(index 1), 229 layer B (index 2) and so on.</p><p>The number of filled elements are stored at <code class="constant">dtv_property.stat.len</code>.</p><p>Each element of the <code class="constant">dtv_property.stat.dtv_stats</code> array consists on two elements:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><code class="constant">svalue</code> or <code class="constant">uvalue</code>, where 230 <code class="constant">svalue</code> is for signed values of the measure (dB measures) 231 and <code class="constant">uvalue</code> is for unsigned values (counters, relative scale)</p></li><li class="listitem" style="list-style-type: circle"><p><code class="constant">scale</code> - Scale for the value. It can be:</p><div class="itemizedlist"><a name="fecap-scale-params"></a><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><a name="FE-SCALE-NOT-AVAILABLE"></a><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</p></li><li class="listitem" style="list-style-type: disc"><p><a name="FE-SCALE-DECIBEL"></a><code class="constant">FE_SCALE_DECIBEL</code> - parameter is a signed value, measured in 1/1000 dB</p></li><li class="listitem" style="list-style-type: disc"><p><a name="FE-SCALE-RELATIVE"></a><code class="constant">FE_SCALE_RELATIVE</code> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</p></li><li class="listitem" style="list-style-type: disc"><p><a name="FE-SCALE-COUNTER"></a><code class="constant">FE_SCALE_COUNTER</code> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</p></li></ul></div></li></ul></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-SIGNAL-STRENGTH"></a><code class="constant">DTV_STAT_SIGNAL_STRENGTH</code></h4></div></div></div><p>Indicates the signal strength level at the analog part of the tuner or of the demod.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_DECIBEL</code> - signal strength is in 0.001 dBm units, power measured in miliwatts. This value is generally negative.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_RELATIVE</code> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-CNR"></a><code class="constant">DTV_STAT_CNR</code></h4></div></div></div><p>Indicates the Signal to Noise ratio for the main carrier.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_DECIBEL</code> - Signal/Noise ratio is in 0.001 dB units.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_RELATIVE</code> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-PRE-ERROR-BIT-COUNT"></a><code class="constant">DTV_STAT_PRE_ERROR_BIT_COUNT</code></h4></div></div></div><p>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</p><p>This measure is taken during the same interval as <code class="constant">DTV_STAT_PRE_TOTAL_BIT_COUNT</code>.</p><p>In order to get the BER (Bit Error Rate) measurement, it should be divided by 232 <a class="link" href="frontend-properties.html#DTV-STAT-PRE-TOTAL-BIT-COUNT" title="DTV_STAT_PRE_TOTAL_BIT_COUNT"><code class="constant">DTV_STAT_PRE_TOTAL_BIT_COUNT</code></a>.</p><p>This measurement is monotonically increased, as the frontend gets more bit count measurements. 233 The frontend may reset it when a channel/transponder is tuned.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of error bits counted before the inner coding.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-PRE-TOTAL-BIT-COUNT"></a><code class="constant">DTV_STAT_PRE_TOTAL_BIT_COUNT</code></h4></div></div></div><p>Measures the amount of bits received before the inner code block, during the same period as 234 <a class="link" href="frontend-properties.html#DTV-STAT-PRE-ERROR-BIT-COUNT" title="DTV_STAT_PRE_ERROR_BIT_COUNT"><code class="constant">DTV_STAT_PRE_ERROR_BIT_COUNT</code></a> measurement was taken.</p><p>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, 235 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</p><p>This measurement is monotonically increased, as the frontend gets more bit count measurements. 236 The frontend may reset it when a channel/transponder is tuned.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of bits counted while measuring 237 <a class="link" href="frontend-properties.html#DTV-STAT-PRE-ERROR-BIT-COUNT" title="DTV_STAT_PRE_ERROR_BIT_COUNT"><code class="constant">DTV_STAT_PRE_ERROR_BIT_COUNT</code></a>.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-POST-ERROR-BIT-COUNT"></a><code class="constant">DTV_STAT_POST_ERROR_BIT_COUNT</code></h4></div></div></div><p>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</p><p>This measure is taken during the same interval as <code class="constant">DTV_STAT_POST_TOTAL_BIT_COUNT</code>.</p><p>In order to get the BER (Bit Error Rate) measurement, it should be divided by 238 <a class="link" href="frontend-properties.html#DTV-STAT-POST-TOTAL-BIT-COUNT" title="DTV_STAT_POST_TOTAL_BIT_COUNT"><code class="constant">DTV_STAT_POST_TOTAL_BIT_COUNT</code></a>.</p><p>This measurement is monotonically increased, as the frontend gets more bit count measurements. 239 The frontend may reset it when a channel/transponder is tuned.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of error bits counted after the inner coding.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-POST-TOTAL-BIT-COUNT"></a><code class="constant">DTV_STAT_POST_TOTAL_BIT_COUNT</code></h4></div></div></div><p>Measures the amount of bits received after the inner coding, during the same period as 240 <a class="link" href="frontend-properties.html#DTV-STAT-POST-ERROR-BIT-COUNT" title="DTV_STAT_POST_ERROR_BIT_COUNT"><code class="constant">DTV_STAT_POST_ERROR_BIT_COUNT</code></a> measurement was taken.</p><p>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, 241 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</p><p>This measurement is monotonically increased, as the frontend gets more bit count measurements. 242 The frontend may reset it when a channel/transponder is tuned.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of bits counted while measuring 243 <a class="link" href="frontend-properties.html#DTV-STAT-POST-ERROR-BIT-COUNT" title="DTV_STAT_POST_ERROR_BIT_COUNT"><code class="constant">DTV_STAT_POST_ERROR_BIT_COUNT</code></a>.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-ERROR-BLOCK-COUNT"></a><code class="constant">DTV_STAT_ERROR_BLOCK_COUNT</code></h4></div></div></div><p>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</p><p>This measurement is monotonically increased, as the frontend gets more bit count measurements. 244 The frontend may reset it when a channel/transponder is tuned.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of error blocks counted after the outer coding.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="DTV-STAT-TOTAL-BLOCK-COUNT"></a><code class="constant">DTV-STAT_TOTAL_BLOCK_COUNT</code></h4></div></div></div><p>Measures the total number of blocks received during the same period as 245 <a class="link" href="frontend-properties.html#DTV-STAT-ERROR-BLOCK-COUNT" title="DTV_STAT_ERROR_BLOCK_COUNT"><code class="constant">DTV_STAT_ERROR_BLOCK_COUNT</code></a> measurement was taken.</p><p>It can be used to calculate the PER indicator, by dividing 246 <a class="link" href="frontend-properties.html#DTV-STAT-ERROR-BLOCK-COUNT" title="DTV_STAT_ERROR_BLOCK_COUNT"><code class="constant">DTV_STAT_ERROR_BLOCK_COUNT</code></a> 247 by <a class="link" href="frontend-properties.html#DTV-STAT-TOTAL-BLOCK-COUNT" title="DTV-STAT_TOTAL_BLOCK_COUNT"><code class="constant">DTV-STAT-TOTAL-BLOCK-COUNT</code></a>.</p><p>Possible scales for this metric are:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: bullet; "><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_NOT_AVAILABLE</code> - it failed to measure it, or the measurement was not complete yet.</p></li><li class="listitem" style="list-style-type: disc"><p><code class="constant">FE_SCALE_COUNTER</code> - Number of blocks counted while measuring 248 <a class="link" href="frontend-properties.html#DTV-STAT-ERROR-BLOCK-COUNT" title="DTV_STAT_ERROR_BLOCK_COUNT"><code class="constant">DTV_STAT_ERROR_BLOCK_COUNT</code></a>.</p></li></ul></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="frontend-property-terrestrial-systems"></a>Properties used on terrestrial delivery systems</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#dvbt-params">DVB-T delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#dvbt2-params">DVB-T2 delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#isdbt">ISDB-T delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#atsc-params">ATSC delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#atscmh-params">ATSC-MH delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#dtmb-params">DTMB delivery system</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbt-params"></a>DVB-T delivery system</h4></div></div></div><p>The following parameters are valid for DVB-T:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CODE-RATE-HP" title="DTV_CODE_RATE_HP"><code class="constant">DTV_CODE_RATE_HP</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CODE-RATE-LP" title="DTV_CODE_RATE_LP"><code class="constant">DTV_CODE_RATE_LP</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-GUARD-INTERVAL" title="DTV_GUARD_INTERVAL"><code class="constant">DTV_GUARD_INTERVAL</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TRANSMISSION-MODE" title="DTV_TRANSMISSION_MODE"><code class="constant">DTV_TRANSMISSION_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-HIERARCHY" title="DTV_HIERARCHY"><code class="constant">DTV_HIERARCHY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-LNA" title="DTV_LNA"><code class="constant">DTV_LNA</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbt2-params"></a>DVB-T2 delivery system</h4></div></div></div><p>DVB-T2 support is currently in the early stages 249 of development, so expect that this section maygrow and become 250 more detailed with time.</p><p>The following parameters are valid for DVB-T2:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CODE-RATE-HP" title="DTV_CODE_RATE_HP"><code class="constant">DTV_CODE_RATE_HP</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CODE-RATE-LP" title="DTV_CODE_RATE_LP"><code class="constant">DTV_CODE_RATE_LP</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-GUARD-INTERVAL" title="DTV_GUARD_INTERVAL"><code class="constant">DTV_GUARD_INTERVAL</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TRANSMISSION-MODE" title="DTV_TRANSMISSION_MODE"><code class="constant">DTV_TRANSMISSION_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-HIERARCHY" title="DTV_HIERARCHY"><code class="constant">DTV_HIERARCHY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-STREAM-ID" title="DTV_STREAM_ID"><code class="constant">DTV_STREAM_ID</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-LNA" title="DTV_LNA"><code class="constant">DTV_LNA</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="isdbt"></a>ISDB-T delivery system</h4></div></div></div><p>This ISDB-T/ISDB-Tsb API extension should reflect all information 251 needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible 252 that some very sophisticated devices won't need certain parameters to 253 tune.</p><p>The information given here should help application writers to know how 254 to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</p><p>The details given here about ISDB-T and ISDB-Tsb are just enough to 255 basically show the dependencies between the needed parameter values, 256 but surely some information is left out. For more detailed information 257 see the following documents:</p><p>ARIB STD-B31 - "Transmission System for Digital Terrestrial 258 Television Broadcasting" and</p><p>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial 259 Television Broadcasting".</p><p>In order to understand the ISDB specific parameters, 260 one has to have some knowledge the channel structure in 261 ISDB-T and ISDB-Tsb. I.e. it has to be known to 262 the reader that an ISDB-T channel consists of 13 segments, 263 that it can have up to 3 layer sharing those segments, 264 and things like that.</p><p>The following parameters are valid for ISDB-T:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-GUARD-INTERVAL" title="DTV_GUARD_INTERVAL"><code class="constant">DTV_GUARD_INTERVAL</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TRANSMISSION-MODE" title="DTV_TRANSMISSION_MODE"><code class="constant">DTV_TRANSMISSION_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-ENABLED" title="DTV_ISDBT_LAYER_ENABLED"><code class="constant">DTV_ISDBT_LAYER_ENABLED</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-PARTIAL-RECEPTION" title="DTV_ISDBT_PARTIAL_RECEPTION"><code class="constant">DTV_ISDBT_PARTIAL_RECEPTION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-SOUND-BROADCASTING" title="DTV_ISDBT_SOUND_BROADCASTING"><code class="constant">DTV_ISDBT_SOUND_BROADCASTING</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-SB-SUBCHANNEL-ID" title="DTV_ISDBT_SB_SUBCHANNEL_ID"><code class="constant">DTV_ISDBT_SB_SUBCHANNEL_ID</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-SB-SEGMENT-IDX" title="DTV_ISDBT_SB_SEGMENT_IDX"><code class="constant">DTV_ISDBT_SB_SEGMENT_IDX</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-SB-SEGMENT-COUNT" title="DTV_ISDBT_SB_SEGMENT_COUNT"><code class="constant">DTV_ISDBT_SB_SEGMENT_COUNT</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-FEC" title="DTV_ISDBT_LAYER*_FEC"><code class="constant">DTV_ISDBT_LAYERA_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-MODULATION" title="DTV_ISDBT_LAYER*_MODULATION"><code class="constant">DTV_ISDBT_LAYERA_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-SEGMENT-COUNT" title="DTV_ISDBT_LAYER*_SEGMENT_COUNT"><code class="constant">DTV_ISDBT_LAYERA_SEGMENT_COUNT</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-TIME-INTERLEAVING" title="DTV_ISDBT_LAYER*_TIME_INTERLEAVING"><code class="constant">DTV_ISDBT_LAYERA_TIME_INTERLEAVING</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-FEC" title="DTV_ISDBT_LAYER*_FEC"><code class="constant">DTV_ISDBT_LAYERB_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-MODULATION" title="DTV_ISDBT_LAYER*_MODULATION"><code class="constant">DTV_ISDBT_LAYERB_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-SEGMENT-COUNT" title="DTV_ISDBT_LAYER*_SEGMENT_COUNT"><code class="constant">DTV_ISDBT_LAYERB_SEGMENT_COUNT</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-TIME-INTERLEAVING" title="DTV_ISDBT_LAYER*_TIME_INTERLEAVING"><code class="constant">DTV_ISDBT_LAYERB_TIME_INTERLEAVING</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-FEC" title="DTV_ISDBT_LAYER*_FEC"><code class="constant">DTV_ISDBT_LAYERC_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-MODULATION" title="DTV_ISDBT_LAYER*_MODULATION"><code class="constant">DTV_ISDBT_LAYERC_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-SEGMENT-COUNT" title="DTV_ISDBT_LAYER*_SEGMENT_COUNT"><code class="constant">DTV_ISDBT_LAYERC_SEGMENT_COUNT</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ISDBT-LAYER-TIME-INTERLEAVING" title="DTV_ISDBT_LAYER*_TIME_INTERLEAVING"><code class="constant">DTV_ISDBT_LAYERC_TIME_INTERLEAVING</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="atsc-params"></a>ATSC delivery system</h4></div></div></div><p>The following parameters are valid for ATSC:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="atscmh-params"></a>ATSC-MH delivery system</h4></div></div></div><p>The following parameters are valid for ATSC-MH:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-FIC-VER" title="DTV_ATSCMH_FIC_VER"><code class="constant">DTV_ATSCMH_FIC_VER</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-PARADE-ID" title="DTV_ATSCMH_PARADE_ID"><code class="constant">DTV_ATSCMH_PARADE_ID</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-NOG" title="DTV_ATSCMH_NOG"><code class="constant">DTV_ATSCMH_NOG</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-TNOG" title="DTV_ATSCMH_TNOG"><code class="constant">DTV_ATSCMH_TNOG</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SGN" title="DTV_ATSCMH_SGN"><code class="constant">DTV_ATSCMH_SGN</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-PRC" title="DTV_ATSCMH_PRC"><code class="constant">DTV_ATSCMH_PRC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-RS-FRAME-MODE" title="DTV_ATSCMH_RS_FRAME_MODE"><code class="constant">DTV_ATSCMH_RS_FRAME_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-RS-FRAME-ENSEMBLE" title="DTV_ATSCMH_RS_FRAME_ENSEMBLE"><code class="constant">DTV_ATSCMH_RS_FRAME_ENSEMBLE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-RS-CODE-MODE-PRI" title="DTV_ATSCMH_RS_CODE_MODE_PRI"><code class="constant">DTV_ATSCMH_RS_CODE_MODE_PRI</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-RS-CODE-MODE-SEC" title="DTV_ATSCMH_RS_CODE_MODE_SEC"><code class="constant">DTV_ATSCMH_RS_CODE_MODE_SEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SCCC-BLOCK-MODE" title="DTV_ATSCMH_SCCC_BLOCK_MODE"><code class="constant">DTV_ATSCMH_SCCC_BLOCK_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SCCC-CODE-MODE-A" title="DTV_ATSCMH_SCCC_CODE_MODE_A"><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_A</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SCCC-CODE-MODE-B" title="DTV_ATSCMH_SCCC_CODE_MODE_B"><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_B</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SCCC-CODE-MODE-C" title="DTV_ATSCMH_SCCC_CODE_MODE_C"><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_C</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ATSCMH-SCCC-CODE-MODE-D" title="DTV_ATSCMH_SCCC_CODE_MODE_D"><code class="constant">DTV_ATSCMH_SCCC_CODE_MODE_D</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dtmb-params"></a>DTMB delivery system</h4></div></div></div><p>The following parameters are valid for DTMB:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-BANDWIDTH-HZ" title="DTV_BANDWIDTH_HZ"><code class="constant">DTV_BANDWIDTH_HZ</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INNER-FEC" title="DTV_INNER_FEC"><code class="constant">DTV_INNER_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-GUARD-INTERVAL" title="DTV_GUARD_INTERVAL"><code class="constant">DTV_GUARD_INTERVAL</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TRANSMISSION-MODE" title="DTV_TRANSMISSION_MODE"><code class="constant">DTV_TRANSMISSION_MODE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INTERLEAVING" title="DTV_INTERLEAVING"><code class="constant">DTV_INTERLEAVING</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-LNA" title="DTV_LNA"><code class="constant">DTV_LNA</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="frontend-property-cable-systems"></a>Properties used on cable delivery systems</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#dvbc-params">DVB-C delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#dvbc-annex-b-params">DVB-C Annex B delivery system</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbc-params"></a>DVB-C delivery system</h4></div></div></div><p>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</p><p>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</p><p>The following parameters are valid for DVB-C Annex A/C:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-SYMBOL-RATE" title="DTV_SYMBOL_RATE"><code class="constant">DTV_SYMBOL_RATE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INNER-FEC" title="DTV_INNER_FEC"><code class="constant">DTV_INNER_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-LNA" title="DTV_LNA"><code class="constant">DTV_LNA</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbc-annex-b-params"></a>DVB-C Annex B delivery system</h4></div></div></div><p>The DVB-C Annex-B is only used on a few Countries like the United States.</p><p>The following parameters are valid for DVB-C Annex B:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-LNA" title="DTV_LNA"><code class="constant">DTV_LNA</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="frontend-property-satellite-systems"></a>Properties used on satellite delivery systems</h3></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="frontend-properties.html#dvbs-params">DVB-S delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#dvbs2-params">DVB-S2 delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#turbo-params">Turbo code delivery system</a></span></dt><dt><span class="section"><a href="frontend-properties.html#isdbs-params">ISDB-S delivery system</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbs-params"></a>DVB-S delivery system</h4></div></div></div><p>The following parameters are valid for DVB-S:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-SYMBOL-RATE" title="DTV_SYMBOL_RATE"><code class="constant">DTV_SYMBOL_RATE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INNER-FEC" title="DTV_INNER_FEC"><code class="constant">DTV_INNER_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-VOLTAGE" title="DTV_VOLTAGE"><code class="constant">DTV_VOLTAGE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TONE" title="DTV_TONE"><code class="constant">DTV_TONE</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p><p>Future implementations might add those two missing parameters:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DISEQC-MASTER" title="DTV_DISEQC_MASTER"><code class="constant">DTV_DISEQC_MASTER</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DISEQC-SLAVE-REPLY" title="DTV_DISEQC_SLAVE_REPLY"><code class="constant">DTV_DISEQC_SLAVE_REPLY</code></a></p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="dvbs2-params"></a>DVB-S2 delivery system</h4></div></div></div><p>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-PILOT" title="DTV_PILOT"><code class="constant">DTV_PILOT</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-ROLLOFF" title="DTV_ROLLOFF"><code class="constant">DTV_ROLLOFF</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-STREAM-ID" title="DTV_STREAM_ID"><code class="constant">DTV_STREAM_ID</code></a></p></li></ul></div><p>In addition, the <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">DTV QoS statistics</a> are also valid.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="turbo-params"></a>Turbo code delivery system</h4></div></div></div><p>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-MODULATION" title="DTV_MODULATION"><code class="constant">DTV_MODULATION</code></a></p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="isdbs-params"></a>ISDB-S delivery system</h4></div></div></div><p>The following parameters are valid for ISDB-S:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: opencircle; "><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-API-VERSION" title="DTV_API_VERSION"><code class="constant">DTV_API_VERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-DELIVERY-SYSTEM" title="DTV_DELIVERY_SYSTEM"><code class="constant">DTV_DELIVERY_SYSTEM</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-TUNE" title="DTV_TUNE"><code class="constant">DTV_TUNE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-CLEAR" title="DTV_CLEAR"><code class="constant">DTV_CLEAR</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-FREQUENCY" title="DTV_FREQUENCY"><code class="constant">DTV_FREQUENCY</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INVERSION" title="DTV_INVERSION"><code class="constant">DTV_INVERSION</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-SYMBOL-RATE" title="DTV_SYMBOL_RATE"><code class="constant">DTV_SYMBOL_RATE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-INNER-FEC" title="DTV_INNER_FEC"><code class="constant">DTV_INNER_FEC</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-VOLTAGE" title="DTV_VOLTAGE"><code class="constant">DTV_VOLTAGE</code></a></p></li><li class="listitem" style="list-style-type: circle"><p><a class="link" href="frontend-properties.html#DTV-STREAM-ID" title="DTV_STREAM_ID"><code class="constant">DTV_STREAM_ID</code></a></p></li></ul></div></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="dvb-fe-read-status.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="dvb_frontend.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="frontend_fcalls.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Querying frontend status and statistics </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Frontend Function Calls</td></tr></table></div></body></html> 265