1<section id="FE_GET_SET_PROPERTY"> 2<title><constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></title> 3<para>This section describes the DVB version 5 extension of the DVB-API, also 4called "S2API", as this API were added to provide support for DVB-S2. It was 5designed to be able to replace the old frontend API. Yet, the DISEQC and 6the capability ioctls weren't implemented yet via the new way.</para> 7<para>The typical usage for the <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant> 8API is to replace the ioctl's were the <link linkend="dvb-frontend-parameters"> 9struct <constant>dvb_frontend_parameters</constant></link> were used.</para> 10<section id="dtv-stats"> 11<title>DTV stats type</title> 12<programlisting> 13struct dtv_stats { 14 __u8 scale; /* enum fecap_scale_params type */ 15 union { 16 __u64 uvalue; /* for counters and relative scales */ 17 __s64 svalue; /* for 1/1000 dB measures */ 18 }; 19} __packed; 20</programlisting> 21</section> 22<section id="dtv-fe-stats"> 23<title>DTV stats type</title> 24<programlisting> 25#define MAX_DTV_STATS 4 26 27struct dtv_fe_stats { 28 __u8 len; 29 struct dtv_stats stat[MAX_DTV_STATS]; 30} __packed; 31</programlisting> 32</section> 33 34<section id="dtv-property"> 35<title>DTV property type</title> 36<programlisting> 37/* Reserved fields should be set to 0 */ 38 39struct dtv_property { 40 __u32 cmd; 41 __u32 reserved[3]; 42 union { 43 __u32 data; 44 struct dtv_fe_stats st; 45 struct { 46 __u8 data[32]; 47 __u32 len; 48 __u32 reserved1[3]; 49 void *reserved2; 50 } buffer; 51 } u; 52 int result; 53} __attribute__ ((packed)); 54 55/* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */ 56#define DTV_IOCTL_MAX_MSGS 64 57</programlisting> 58</section> 59<section id="dtv-properties"> 60<title>DTV properties type</title> 61<programlisting> 62struct dtv_properties { 63 __u32 num; 64 struct dtv_property *props; 65}; 66</programlisting> 67</section> 68 69<section id="FE_GET_PROPERTY"> 70<title>FE_GET_PROPERTY</title> 71<para>DESCRIPTION 72</para> 73<informaltable><tgroup cols="1"><tbody><row><entry 74 align="char"> 75<para>This ioctl call returns one or more frontend properties. This call only 76 requires read-only access to the device.</para> 77</entry> 78 </row></tbody></tgroup></informaltable> 79<para>SYNOPSIS 80</para> 81<informaltable><tgroup cols="1"><tbody><row><entry 82 align="char"> 83<para>int ioctl(int fd, int request = <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>, 84 dtv_properties ⋆props);</para> 85</entry> 86 </row></tbody></tgroup></informaltable> 87<para>PARAMETERS 88</para> 89<informaltable><tgroup cols="2"><tbody><row><entry align="char"> 90<para>int fd</para> 91</entry><entry 92 align="char"> 93<para>File descriptor returned by a previous call to open().</para> 94</entry> 95 </row><row><entry 96 align="char"> 97<para>int num</para> 98</entry><entry 99 align="char"> 100<para>Equals <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link> for this command.</para> 101</entry> 102 </row><row><entry 103 align="char"> 104<para>struct dtv_property *props</para> 105</entry><entry 106 align="char"> 107<para>Points to the location where the front-end property commands are stored.</para> 108</entry> 109 </row></tbody></tgroup></informaltable> 110&return-value-dvb; 111<informaltable><tgroup cols="2"><tbody><row> 112 <entry align="char"><para>EOPNOTSUPP</para></entry> 113 <entry align="char"><para>Property type not supported.</para></entry> 114 </row></tbody></tgroup></informaltable> 115</section> 116 117<section id="FE_SET_PROPERTY"> 118<title>FE_SET_PROPERTY</title> 119<para>DESCRIPTION 120</para> 121<informaltable><tgroup cols="1"><tbody><row><entry 122 align="char"> 123<para>This ioctl call sets one or more frontend properties. This call 124 requires read/write access to the device.</para> 125</entry> 126 </row></tbody></tgroup></informaltable> 127<para>SYNOPSIS 128</para> 129<informaltable><tgroup cols="1"><tbody><row><entry 130 align="char"> 131<para>int ioctl(int fd, int request = <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>, 132 dtv_properties ⋆props);</para> 133</entry> 134 </row></tbody></tgroup></informaltable> 135<para>PARAMETERS 136</para> 137<informaltable><tgroup cols="2"><tbody><row><entry align="char"> 138<para>int fd</para> 139</entry><entry 140 align="char"> 141<para>File descriptor returned by a previous call to open().</para> 142</entry> 143 </row><row><entry 144 align="char"> 145<para>int num</para> 146</entry><entry 147 align="char"> 148<para>Equals <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link> for this command.</para> 149</entry> 150 </row><row><entry 151 align="char"> 152<para>struct dtv_property *props</para> 153</entry><entry 154 align="char"> 155<para>Points to the location where the front-end property commands are stored.</para> 156</entry> 157 </row></tbody></tgroup></informaltable> 158&return-value-dvb; 159<informaltable><tgroup cols="2"><tbody><row> 160 <entry align="char"><para>EOPNOTSUPP</para></entry> 161 <entry align="char"><para>Property type not supported.</para></entry> 162 </row></tbody></tgroup></informaltable> 163</section> 164 165<section> 166 <title>Property types</title> 167<para> 168On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>/<link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>, 169the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to 170get/set up to 64 properties. The actual meaning of each property is described on the next sections. 171</para> 172 173<para>The available frontend property types are shown on the next section.</para> 174</section> 175 176<section id="fe_property_parameters"> 177 <title>Digital TV property parameters</title> 178 <section id="DTV-UNDEFINED"> 179 <title><constant>DTV_UNDEFINED</constant></title> 180 <para>Used internally. A GET/SET operation for it won't change or return anything.</para> 181 </section> 182 <section id="DTV-TUNE"> 183 <title><constant>DTV_TUNE</constant></title> 184 <para>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <constant>FE_SET_FRONTEND</constant> ioctl.</para> 185 </section> 186 <section id="DTV-CLEAR"> 187 <title><constant>DTV_CLEAR</constant></title> 188 <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para> 189 </section> 190 <section id="DTV-FREQUENCY"> 191 <title><constant>DTV_FREQUENCY</constant></title> 192 193 <para>Central frequency of the channel.</para> 194 195 <para>Notes:</para> 196 <para>1)For satellital delivery systems, it is measured in kHz. 197 For the other ones, it is measured in Hz.</para> 198 <para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz. 199 E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of 200 the channel which is 6MHz.</para> 201 202 <para>3)As in ISDB-Tsb the channel consists of only one or three segments the 203 frequency step is 429kHz, 3*429 respectively. As for ISDB-T the 204 central frequency of the channel is expected.</para> 205 </section> 206 <section id="DTV-MODULATION"> 207 <title><constant>DTV_MODULATION</constant></title> 208<para>Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para> 209<programlisting> 210 typedef enum fe_modulation { 211 QPSK, 212 QAM_16, 213 QAM_32, 214 QAM_64, 215 QAM_128, 216 QAM_256, 217 QAM_AUTO, 218 VSB_8, 219 VSB_16, 220 PSK_8, 221 APSK_16, 222 APSK_32, 223 DQPSK, 224 QAM_4_NR, 225 } fe_modulation_t; 226</programlisting> 227 </section> 228 <section id="DTV-BANDWIDTH-HZ"> 229 <title><constant>DTV_BANDWIDTH_HZ</constant></title> 230 231 <para>Bandwidth for the channel, in HZ.</para> 232 233 <para>Possible values: 234 <constant>1712000</constant>, 235 <constant>5000000</constant>, 236 <constant>6000000</constant>, 237 <constant>7000000</constant>, 238 <constant>8000000</constant>, 239 <constant>10000000</constant>. 240 </para> 241 242 <para>Notes:</para> 243 244 <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para> 245 <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para> 246 <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth 247 for DVB-C depends on the symbol rate</para> 248 <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from 249 other parameters (DTV_ISDBT_SB_SEGMENT_IDX, 250 DTV_ISDBT_SB_SEGMENT_COUNT).</para> 251 <para>5) DVB-T supports 6, 7 and 8MHz.</para> 252 <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para> 253 </section> 254 <section id="DTV-INVERSION"> 255 <title><constant>DTV_INVERSION</constant></title> 256 <para>The Inversion field can take one of these values: 257 </para> 258 <programlisting> 259 typedef enum fe_spectral_inversion { 260 INVERSION_OFF, 261 INVERSION_ON, 262 INVERSION_AUTO 263 } fe_spectral_inversion_t; 264 </programlisting> 265 <para>It indicates if spectral inversion should be presumed or not. In the automatic setting 266 (<constant>INVERSION_AUTO</constant>) the hardware will try to figure out the correct setting by 267 itself. 268 </para> 269 </section> 270 <section id="DTV-DISEQC-MASTER"> 271 <title><constant>DTV_DISEQC_MASTER</constant></title> 272 <para>Currently not implemented.</para> 273 </section> 274 <section id="DTV-SYMBOL-RATE"> 275 <title><constant>DTV_SYMBOL_RATE</constant></title> 276 <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para> 277 </section> 278 <section id="DTV-INNER-FEC"> 279 <title><constant>DTV_INNER_FEC</constant></title> 280 <para>Used cable/satellite transmissions. The acceptable values are: 281 </para> 282 <programlisting> 283typedef enum fe_code_rate { 284 FEC_NONE = 0, 285 FEC_1_2, 286 FEC_2_3, 287 FEC_3_4, 288 FEC_4_5, 289 FEC_5_6, 290 FEC_6_7, 291 FEC_7_8, 292 FEC_8_9, 293 FEC_AUTO, 294 FEC_3_5, 295 FEC_9_10, 296 FEC_2_5, 297} fe_code_rate_t; 298 </programlisting> 299 <para>which correspond to error correction rates of 1/2, 2/3, etc., 300 no error correction or auto detection.</para> 301 </section> 302 <section id="DTV-VOLTAGE"> 303 <title><constant>DTV_VOLTAGE</constant></title> 304 <para>The voltage is usually used with non-DiSEqC capable LNBs to switch 305 the polarzation (horizontal/vertical). When using DiSEqC epuipment this 306 voltage has to be switched consistently to the DiSEqC commands as 307 described in the DiSEqC spec.</para> 308 <programlisting> 309 typedef enum fe_sec_voltage { 310 SEC_VOLTAGE_13, 311 SEC_VOLTAGE_18 312 } fe_sec_voltage_t; 313 </programlisting> 314 </section> 315 <section id="DTV-TONE"> 316 <title><constant>DTV_TONE</constant></title> 317 <para>Currently not used.</para> 318 </section> 319 <section id="DTV-PILOT"> 320 <title><constant>DTV_PILOT</constant></title> 321 <para>Sets DVB-S2 pilot</para> 322 <section id="fe-pilot-t"> 323 <title>fe_pilot type</title> 324 <programlisting> 325typedef enum fe_pilot { 326 PILOT_ON, 327 PILOT_OFF, 328 PILOT_AUTO, 329} fe_pilot_t; 330 </programlisting> 331 </section> 332 </section> 333 <section id="DTV-ROLLOFF"> 334 <title><constant>DTV_ROLLOFF</constant></title> 335 <para>Sets DVB-S2 rolloff</para> 336 337 <section id="fe-rolloff-t"> 338 <title>fe_rolloff type</title> 339 <programlisting> 340typedef enum fe_rolloff { 341 ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */ 342 ROLLOFF_20, 343 ROLLOFF_25, 344 ROLLOFF_AUTO, 345} fe_rolloff_t; 346 </programlisting> 347 </section> 348 </section> 349 <section id="DTV-DISEQC-SLAVE-REPLY"> 350 <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title> 351 <para>Currently not implemented.</para> 352 </section> 353 <section id="DTV-FE-CAPABILITY-COUNT"> 354 <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title> 355 <para>Currently not implemented.</para> 356 </section> 357 <section id="DTV-FE-CAPABILITY"> 358 <title><constant>DTV_FE_CAPABILITY</constant></title> 359 <para>Currently not implemented.</para> 360 </section> 361 <section id="DTV-DELIVERY-SYSTEM"> 362 <title><constant>DTV_DELIVERY_SYSTEM</constant></title> 363 <para>Specifies the type of Delivery system</para> 364 <section id="fe-delivery-system-t"> 365 <title>fe_delivery_system type</title> 366 <para>Possible values: </para> 367<programlisting> 368 369typedef enum fe_delivery_system { 370 SYS_UNDEFINED, 371 SYS_DVBC_ANNEX_A, 372 SYS_DVBC_ANNEX_B, 373 SYS_DVBT, 374 SYS_DSS, 375 SYS_DVBS, 376 SYS_DVBS2, 377 SYS_DVBH, 378 SYS_ISDBT, 379 SYS_ISDBS, 380 SYS_ISDBC, 381 SYS_ATSC, 382 SYS_ATSCMH, 383 SYS_DTMB, 384 SYS_CMMB, 385 SYS_DAB, 386 SYS_DVBT2, 387 SYS_TURBO, 388 SYS_DVBC_ANNEX_C, 389} fe_delivery_system_t; 390</programlisting> 391 </section> 392 </section> 393 <section id="DTV-ISDBT-PARTIAL-RECEPTION"> 394 <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title> 395 396 <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether 397 the channel is in partial reception mode or not.</para> 398 399 <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and 400 <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para> 401 402 <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1' 403 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel 404 is consisting of one segment and layer or three segments and two layers.</para> 405 406 <para>Possible values: 0, 1, -1 (AUTO)</para> 407 </section> 408 <section id="DTV-ISDBT-SOUND-BROADCASTING"> 409 <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title> 410 411 <para>This field represents whether the other DTV_ISDBT_*-parameters are 412 referring to an ISDB-T and an ISDB-Tsb channel. (See also 413 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para> 414 415 <para>Possible values: 0, 1, -1 (AUTO)</para> 416 </section> 417 <section id="DTV-ISDBT-SB-SUBCHANNEL-ID"> 418 <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title> 419 420 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 421 422 <para>(Note of the author: This might not be the correct description of the 423 <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical 424 background needed to program a device)</para> 425 426 <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a 427 set of connected ISDB-Tsb channels. In this set of channels every 428 channel can be received independently. The number of connected 429 ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum 430 bandwidth available.</para> 431 432 <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The 433 broadcaster has several possibilities to put those channels in the 434 air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8 435 segments from position 1-8 to 5-13 or anything in between.</para> 436 437 <para>The underlying layer of segments are subchannels: each segment is 438 consisting of several subchannels with a predefined IDs. A sub-channel 439 is used to help the demodulator to synchronize on the channel.</para> 440 441 <para>An ISDB-T channel is always centered over all sub-channels. As for 442 the example above, in ISDB-Tsb it is no longer as simple as that.</para> 443 444 <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the 445 sub-channel ID of the segment to be demodulated.</para> 446 447 <para>Possible values: 0 .. 41, -1 (AUTO)</para> 448 </section> 449 <section id="DTV-ISDBT-SB-SEGMENT-IDX"> 450 <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title> 451 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 452 <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be 453 demodulated for an ISDB-Tsb channel where several of them are 454 transmitted in the connected manner.</para> 455 <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para> 456 <para>Note: This value cannot be determined by an automatic channel search.</para> 457 </section> 458 <section id="DTV-ISDBT-SB-SEGMENT-COUNT"> 459 <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title> 460 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 461 <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb 462 channels.</para> 463 <para>Possible values: 1 .. 13</para> 464 <para>Note: This value cannot be determined by an automatic channel search.</para> 465 </section> 466 <section id="isdb-hierq-layers"> 467 <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title> 468 <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in 469 ISDB-T hierarchical layers can be decoded simultaneously. For that 470 reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</para> 471 <para>ISDB-T has 3 hierarchical layers which each can use a part of the 472 available segments. The total number of segments over all layers has 473 to 13 in ISDB-T.</para> 474 <para>There are 3 parameter sets, for Layers A, B and C.</para> 475 <section id="DTV-ISDBT-LAYER-ENABLED"> 476 <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title> 477 <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling 478 layers in the decoding process. Setting all bits of 479 <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be 480 demodulated. This is the default.</para> 481 <para>If the channel is in the partial reception mode 482 (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded 483 independently of the other 12 segments. In that mode layer A has to 484 have a <constant>SEGMENT_COUNT</constant> of 1.</para> 485 <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb 486 according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled 487 accordingly.</para> 488 <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para> 489 <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para> 490 <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para> 491 <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para> 492 <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para> 493 </section> 494 <section id="DTV-ISDBT-LAYER-FEC"> 495 <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title> 496 <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para> 497 </section> 498 <section id="DTV-ISDBT-LAYER-MODULATION"> 499 <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title> 500 <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para> 501 <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant> 502 and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para> 503 </section> 504 <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT"> 505 <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title> 506 <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para> 507 <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and 508 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para> 509 <informaltable id="isdbt-layer_seg-cnt-table"> 510 <tgroup cols="6"> 511 <tbody> 512 <row> 513 <entry>PR</entry> 514 <entry>SB</entry> 515 <entry>Layer A width</entry> 516 <entry>Layer B width</entry> 517 <entry>Layer C width</entry> 518 <entry>total width</entry> 519 </row> 520 <row> 521 <entry>0</entry> 522 <entry>0</entry> 523 <entry>1 .. 13</entry> 524 <entry>1 .. 13</entry> 525 <entry>1 .. 13</entry> 526 <entry>13</entry> 527 </row> 528 <row> 529 <entry>1</entry> 530 <entry>0</entry> 531 <entry>1</entry> 532 <entry>1 .. 13</entry> 533 <entry>1 .. 13</entry> 534 <entry>13</entry> 535 </row> 536 <row> 537 <entry>0</entry> 538 <entry>1</entry> 539 <entry>1</entry> 540 <entry>0</entry> 541 <entry>0</entry> 542 <entry>1</entry> 543 </row> 544 <row> 545 <entry>1</entry> 546 <entry>1</entry> 547 <entry>1</entry> 548 <entry>2</entry> 549 <entry>0</entry> 550 <entry>13</entry> 551 </row> 552 </tbody> 553 </tgroup> 554 </informaltable> 555 </section> 556 <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING"> 557 <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title> 558 <para>Valid values: 0, 1, 2, 4, -1 (AUTO)</para> 559 <para>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</para> 560 <para>Note: The real time interleaving length depends on the mode (fft-size). The values 561 here are referring to what can be found in the TMCC-structure, as shown in the table below.</para> 562 <informaltable id="isdbt-layer-interleaving-table"> 563 <tgroup cols="4" align="center"> 564 <tbody> 565 <row> 566 <entry>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</entry> 567 <entry>Mode 1 (2K FFT)</entry> 568 <entry>Mode 2 (4K FFT)</entry> 569 <entry>Mode 3 (8K FFT)</entry> 570 </row> 571 <row> 572 <entry>0</entry> 573 <entry>0</entry> 574 <entry>0</entry> 575 <entry>0</entry> 576 </row> 577 <row> 578 <entry>1</entry> 579 <entry>4</entry> 580 <entry>2</entry> 581 <entry>1</entry> 582 </row> 583 <row> 584 <entry>2</entry> 585 <entry>8</entry> 586 <entry>4</entry> 587 <entry>2</entry> 588 </row> 589 <row> 590 <entry>4</entry> 591 <entry>16</entry> 592 <entry>8</entry> 593 <entry>4</entry> 594 </row> 595 </tbody> 596 </tgroup> 597 </informaltable> 598 </section> 599 <section id="DTV-ATSCMH-FIC-VER"> 600 <title><constant>DTV_ATSCMH_FIC_VER</constant></title> 601 <para>Version number of the FIC (Fast Information Channel) signaling data.</para> 602 <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para> 603 <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> 604 </section> 605 <section id="DTV-ATSCMH-PARADE-ID"> 606 <title><constant>DTV_ATSCMH_PARADE_ID</constant></title> 607 <para>Parade identification number</para> 608 <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para> 609 <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para> 610 </section> 611 <section id="DTV-ATSCMH-NOG"> 612 <title><constant>DTV_ATSCMH_NOG</constant></title> 613 <para>Number of MH groups per MH subframe for a designated parade.</para> 614 <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> 615 </section> 616 <section id="DTV-ATSCMH-TNOG"> 617 <title><constant>DTV_ATSCMH_TNOG</constant></title> 618 <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para> 619 <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> 620 </section> 621 <section id="DTV-ATSCMH-SGN"> 622 <title><constant>DTV_ATSCMH_SGN</constant></title> 623 <para>Start group number.</para> 624 <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para> 625 </section> 626 <section id="DTV-ATSCMH-PRC"> 627 <title><constant>DTV_ATSCMH_PRC</constant></title> 628 <para>Parade repetition cycle.</para> 629 <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> 630 </section> 631 <section id="DTV-ATSCMH-RS-FRAME-MODE"> 632 <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title> 633 <para>RS frame mode.</para> 634 <para>Possible values are:</para> 635 <para id="atscmh-rs-frame-mode"> 636<programlisting> 637typedef enum atscmh_rs_frame_mode { 638 ATSCMH_RSFRAME_PRI_ONLY = 0, 639 ATSCMH_RSFRAME_PRI_SEC = 1, 640} atscmh_rs_frame_mode_t; 641</programlisting> 642 </para> 643 </section> 644 <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE"> 645 <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title> 646 <para>RS frame ensemble.</para> 647 <para>Possible values are:</para> 648 <para id="atscmh-rs-frame-ensemble"> 649<programlisting> 650typedef enum atscmh_rs_frame_ensemble { 651 ATSCMH_RSFRAME_ENS_PRI = 0, 652 ATSCMH_RSFRAME_ENS_SEC = 1, 653} atscmh_rs_frame_ensemble_t; 654</programlisting> 655 </para> 656 </section> 657 <section id="DTV-ATSCMH-RS-CODE-MODE-PRI"> 658 <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title> 659 <para>RS code mode (primary).</para> 660 <para>Possible values are:</para> 661 <para id="atscmh-rs-code-mode"> 662<programlisting> 663typedef enum atscmh_rs_code_mode { 664 ATSCMH_RSCODE_211_187 = 0, 665 ATSCMH_RSCODE_223_187 = 1, 666 ATSCMH_RSCODE_235_187 = 2, 667} atscmh_rs_code_mode_t; 668</programlisting> 669 </para> 670 </section> 671 <section id="DTV-ATSCMH-RS-CODE-MODE-SEC"> 672 <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title> 673 <para>RS code mode (secondary).</para> 674 <para>Possible values are:</para> 675<programlisting> 676typedef enum atscmh_rs_code_mode { 677 ATSCMH_RSCODE_211_187 = 0, 678 ATSCMH_RSCODE_223_187 = 1, 679 ATSCMH_RSCODE_235_187 = 2, 680} atscmh_rs_code_mode_t; 681</programlisting> 682 </section> 683 <section id="DTV-ATSCMH-SCCC-BLOCK-MODE"> 684 <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title> 685 <para>Series Concatenated Convolutional Code Block Mode.</para> 686 <para>Possible values are:</para> 687 <para id="atscmh-sccc-block-mode"> 688<programlisting> 689typedef enum atscmh_sccc_block_mode { 690 ATSCMH_SCCC_BLK_SEP = 0, 691 ATSCMH_SCCC_BLK_COMB = 1, 692} atscmh_sccc_block_mode_t; 693</programlisting> 694 </para> 695 </section> 696 <section id="DTV-ATSCMH-SCCC-CODE-MODE-A"> 697 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title> 698 <para>Series Concatenated Convolutional Code Rate.</para> 699 <para>Possible values are:</para> 700 <para id="atscmh-sccc-code-mode"> 701<programlisting> 702typedef enum atscmh_sccc_code_mode { 703 ATSCMH_SCCC_CODE_HLF = 0, 704 ATSCMH_SCCC_CODE_QTR = 1, 705} atscmh_sccc_code_mode_t; 706</programlisting> 707 </para> 708 </section> 709 <section id="DTV-ATSCMH-SCCC-CODE-MODE-B"> 710 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title> 711 <para>Series Concatenated Convolutional Code Rate.</para> 712 <para>Possible values are:</para> 713<programlisting> 714typedef enum atscmh_sccc_code_mode { 715 ATSCMH_SCCC_CODE_HLF = 0, 716 ATSCMH_SCCC_CODE_QTR = 1, 717} atscmh_sccc_code_mode_t; 718</programlisting> 719 </section> 720 <section id="DTV-ATSCMH-SCCC-CODE-MODE-C"> 721 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title> 722 <para>Series Concatenated Convolutional Code Rate.</para> 723 <para>Possible values are:</para> 724<programlisting> 725typedef enum atscmh_sccc_code_mode { 726 ATSCMH_SCCC_CODE_HLF = 0, 727 ATSCMH_SCCC_CODE_QTR = 1, 728} atscmh_sccc_code_mode_t; 729</programlisting> 730 </section> 731 <section id="DTV-ATSCMH-SCCC-CODE-MODE-D"> 732 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title> 733 <para>Series Concatenated Convolutional Code Rate.</para> 734 <para>Possible values are:</para> 735<programlisting> 736typedef enum atscmh_sccc_code_mode { 737 ATSCMH_SCCC_CODE_HLF = 0, 738 ATSCMH_SCCC_CODE_QTR = 1, 739} atscmh_sccc_code_mode_t; 740</programlisting> 741 </section> 742 </section> 743 <section id="DTV-API-VERSION"> 744 <title><constant>DTV_API_VERSION</constant></title> 745 <para>Returns the major/minor version of the DVB API</para> 746 </section> 747 <section id="DTV-CODE-RATE-HP"> 748 <title><constant>DTV_CODE_RATE_HP</constant></title> 749 <para>Used on terrestrial transmissions. The acceptable values are: 750 </para> 751 <programlisting> 752typedef enum fe_code_rate { 753 FEC_NONE = 0, 754 FEC_1_2, 755 FEC_2_3, 756 FEC_3_4, 757 FEC_4_5, 758 FEC_5_6, 759 FEC_6_7, 760 FEC_7_8, 761 FEC_8_9, 762 FEC_AUTO, 763 FEC_3_5, 764 FEC_9_10, 765} fe_code_rate_t; 766 </programlisting> 767 </section> 768 <section id="DTV-CODE-RATE-LP"> 769 <title><constant>DTV_CODE_RATE_LP</constant></title> 770 <para>Used on terrestrial transmissions. The acceptable values are: 771 </para> 772 <programlisting> 773typedef enum fe_code_rate { 774 FEC_NONE = 0, 775 FEC_1_2, 776 FEC_2_3, 777 FEC_3_4, 778 FEC_4_5, 779 FEC_5_6, 780 FEC_6_7, 781 FEC_7_8, 782 FEC_8_9, 783 FEC_AUTO, 784 FEC_3_5, 785 FEC_9_10, 786} fe_code_rate_t; 787 </programlisting> 788 </section> 789 <section id="DTV-GUARD-INTERVAL"> 790 <title><constant>DTV_GUARD_INTERVAL</constant></title> 791 792 <para>Possible values are:</para> 793<programlisting> 794typedef enum fe_guard_interval { 795 GUARD_INTERVAL_1_32, 796 GUARD_INTERVAL_1_16, 797 GUARD_INTERVAL_1_8, 798 GUARD_INTERVAL_1_4, 799 GUARD_INTERVAL_AUTO, 800 GUARD_INTERVAL_1_128, 801 GUARD_INTERVAL_19_128, 802 GUARD_INTERVAL_19_256, 803 GUARD_INTERVAL_PN420, 804 GUARD_INTERVAL_PN595, 805 GUARD_INTERVAL_PN945, 806} fe_guard_interval_t; 807</programlisting> 808 809 <para>Notes:</para> 810 <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will 811 try to find the correct guard interval (if capable) and will use TMCC to fill 812 in the missing parameters.</para> 813 <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para> 814 <para>3) DTMB specifies PN420, PN595 and PN945.</para> 815 </section> 816 <section id="DTV-TRANSMISSION-MODE"> 817 <title><constant>DTV_TRANSMISSION_MODE</constant></title> 818 819 <para>Specifies the number of carriers used by the standard</para> 820 821 <para>Possible values are:</para> 822<programlisting> 823typedef enum fe_transmit_mode { 824 TRANSMISSION_MODE_2K, 825 TRANSMISSION_MODE_8K, 826 TRANSMISSION_MODE_AUTO, 827 TRANSMISSION_MODE_4K, 828 TRANSMISSION_MODE_1K, 829 TRANSMISSION_MODE_16K, 830 TRANSMISSION_MODE_32K, 831 TRANSMISSION_MODE_C1, 832 TRANSMISSION_MODE_C3780, 833} fe_transmit_mode_t; 834</programlisting> 835 <para>Notes:</para> 836 <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called 837 'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para> 838 839 <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the 840 hardware will try to find the correct FFT-size (if capable) and will 841 use TMCC to fill in the missing parameters.</para> 842 <para>3) DVB-T specifies 2K and 8K as valid sizes.</para> 843 <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para> 844 <para>5) DTMB specifies C1 and C3780.</para> 845 </section> 846 <section id="DTV-HIERARCHY"> 847 <title><constant>DTV_HIERARCHY</constant></title> 848 <para>Frontend hierarchy</para> 849 <programlisting> 850typedef enum fe_hierarchy { 851 HIERARCHY_NONE, 852 HIERARCHY_1, 853 HIERARCHY_2, 854 HIERARCHY_4, 855 HIERARCHY_AUTO 856 } fe_hierarchy_t; 857 </programlisting> 858 </section> 859 <section id="DTV-STREAM-ID"> 860 <title><constant>DTV_STREAM_ID</constant></title> 861 <para>DVB-S2, DVB-T2 and ISDB-S support the transmission of several 862 streams on a single transport stream. 863 This property enables the DVB driver to handle substream filtering, 864 when supported by the hardware. 865 By default, substream filtering is disabled. 866 </para><para> 867 For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. 868 </para><para> 869 For ISDB, the valid substream id range is from 1 to 65535. 870 </para><para> 871 To disable it, you should use the special macro NO_STREAM_ID_FILTER. 872 </para><para> 873 Note: any value outside the id range also disables filtering. 874 </para> 875 </section> 876 <section id="DTV-DVBT2-PLP-ID-LEGACY"> 877 <title><constant>DTV_DVBT2_PLP_ID_LEGACY</constant></title> 878 <para>Obsolete, replaced with DTV_STREAM_ID.</para> 879 </section> 880 <section id="DTV-ENUM-DELSYS"> 881 <title><constant>DTV_ENUM_DELSYS</constant></title> 882 <para>A Multi standard frontend needs to advertise the delivery systems provided. 883 Applications need to enumerate the provided delivery systems, before using 884 any other operation with the frontend. Prior to it's introduction, 885 FE_GET_INFO was used to determine a frontend type. A frontend which 886 provides more than a single delivery system, FE_GET_INFO doesn't help much. 887 Applications which intends to use a multistandard frontend must enumerate 888 the delivery systems associated with it, rather than trying to use 889 FE_GET_INFO. In the case of a legacy frontend, the result is just the same 890 as with FE_GET_INFO, but in a more structured format </para> 891 </section> 892 <section id="DTV-INTERLEAVING"> 893 <title><constant>DTV_INTERLEAVING</constant></title> 894 <para id="fe-interleaving">Interleaving mode</para> 895 <programlisting> 896enum fe_interleaving { 897 INTERLEAVING_NONE, 898 INTERLEAVING_AUTO, 899 INTERLEAVING_240, 900 INTERLEAVING_720, 901}; 902 </programlisting> 903 </section> 904 <section id="DTV-LNA"> 905 <title><constant>DTV_LNA</constant></title> 906 <para>Low-noise amplifier.</para> 907 <para>Hardware might offer controllable LNA which can be set manually 908 using that parameter. Usually LNA could be found only from 909 terrestrial devices if at all.</para> 910 <para>Possible values: 0, 1, LNA_AUTO</para> 911 <para>0, LNA off</para> 912 <para>1, LNA on</para> 913 <para>use the special macro LNA_AUTO to set LNA auto</para> 914 </section> 915</section> 916 917 <section id="frontend-stat-properties"> 918 <title>Frontend statistics indicators</title> 919 <para>The values are returned via <constant>dtv_property.stat</constant>. 920 If the property is supported, <constant>dtv_property.stat.len</constant> is bigger than zero.</para> 921 <para>For most delivery systems, <constant>dtv_property.stat.len</constant> 922 will be 1 if the stats is supported, and the properties will 923 return a single value for each parameter.</para> 924 <para>It should be noticed, however, that new OFDM delivery systems 925 like ISDB can use different modulation types for each group of 926 carriers. On such standards, up to 3 groups of statistics can be 927 provided, and <constant>dtv_property.stat.len</constant> is updated 928 to reflect the "global" metrics, plus one metric per each carrier 929 group (called "layer" on ISDB).</para> 930 <para>So, in order to be consistent with other delivery systems, the first 931 value at <link linkend="dtv-stats"><constant>dtv_property.stat.dtv_stats</constant></link> 932 array refers to the global metric. The other elements of the array 933 represent each layer, starting from layer A(index 1), 934 layer B (index 2) and so on.</para> 935 <para>The number of filled elements are stored at <constant>dtv_property.stat.len</constant>.</para> 936 <para>Each element of the <constant>dtv_property.stat.dtv_stats</constant> array consists on two elements:</para> 937 <itemizedlist mark='opencircle'> 938 <listitem><para><constant>svalue</constant> or <constant>uvalue</constant>, where 939 <constant>svalue</constant> is for signed values of the measure (dB measures) 940 and <constant>uvalue</constant> is for unsigned values (counters, relative scale)</para></listitem> 941 <listitem><para><constant>scale</constant> - Scale for the value. It can be:</para> 942 <itemizedlist mark='bullet' id="fecap-scale-params"> 943 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</para></listitem> 944 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - parameter is a signed value, measured in 1/1000 dB</para></listitem> 945 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</para></listitem> 946 <listitem><para><constant>FE_SCALE_COUNTER</constant> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</para></listitem> 947 </itemizedlist> 948 </listitem> 949 </itemizedlist> 950 <section id="DTV-STAT-SIGNAL-STRENGTH"> 951 <title><constant>DTV_STAT_SIGNAL_STRENGTH</constant></title> 952 <para>Indicates the signal strength level at the analog part of the tuner or of the demod.</para> 953 <para>Possible scales for this metric are:</para> 954 <itemizedlist mark='bullet'> 955 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 956 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - signal strength is in 0.0001 dBm units, power measured in miliwatts. This value is generally negative.</para></listitem> 957 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</para></listitem> 958 </itemizedlist> 959 </section> 960 <section id="DTV-STAT-CNR"> 961 <title><constant>DTV_STAT_CNR</constant></title> 962 <para>Indicates the Signal to Noise ratio for the main carrier.</para> 963 <para>Possible scales for this metric are:</para> 964 <itemizedlist mark='bullet'> 965 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 966 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - Signal/Noise ratio is in 0.0001 dB units.</para></listitem> 967 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</para></listitem> 968 </itemizedlist> 969 </section> 970 <section id="DTV-STAT-PRE-ERROR-BIT-COUNT"> 971 <title><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></title> 972 <para>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</para> 973 <para>This measure is taken during the same interval as <constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant>.</para> 974 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by 975 <link linkend="DTV-STAT-PRE-TOTAL-BIT-COUNT"><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></link>.</para> 976 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 977 The frontend may reset it when a channel/transponder is tuned.</para> 978 <para>Possible scales for this metric are:</para> 979 <itemizedlist mark='bullet'> 980 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 981 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted before the inner coding.</para></listitem> 982 </itemizedlist> 983 </section> 984 <section id="DTV-STAT-PRE-TOTAL-BIT-COUNT"> 985 <title><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></title> 986 <para>Measures the amount of bits received before the inner code block, during the same period as 987 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> 988 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream, 989 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> 990 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 991 The frontend may reset it when a channel/transponder is tuned.</para> 992 <para>Possible scales for this metric are:</para> 993 <itemizedlist mark='bullet'> 994 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 995 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring 996 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link>.</para></listitem> 997 </itemizedlist> 998 </section> 999 <section id="DTV-STAT-POST-ERROR-BIT-COUNT"> 1000 <title><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></title> 1001 <para>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</para> 1002 <para>This measure is taken during the same interval as <constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant>.</para> 1003 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by 1004 <link linkend="DTV-STAT-POST-TOTAL-BIT-COUNT"><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></link>.</para> 1005 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1006 The frontend may reset it when a channel/transponder is tuned.</para> 1007 <para>Possible scales for this metric are:</para> 1008 <itemizedlist mark='bullet'> 1009 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1010 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted after the inner coding.</para></listitem> 1011 </itemizedlist> 1012 </section> 1013 <section id="DTV-STAT-POST-TOTAL-BIT-COUNT"> 1014 <title><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></title> 1015 <para>Measures the amount of bits received after the inner coding, during the same period as 1016 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> 1017 <para>It should be noticed that this measurement can be smaller than the total amount of bits on the transport stream, 1018 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> 1019 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1020 The frontend may reset it when a channel/transponder is tuned.</para> 1021 <para>Possible scales for this metric are:</para> 1022 <itemizedlist mark='bullet'> 1023 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1024 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring 1025 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link>.</para></listitem> 1026 </itemizedlist> 1027 </section> 1028 <section id="DTV-STAT-ERROR-BLOCK-COUNT"> 1029 <title><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></title> 1030 <para>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</para> 1031 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1032 The frontend may reset it when a channel/transponder is tuned.</para> 1033 <para>Possible scales for this metric are:</para> 1034 <itemizedlist mark='bullet'> 1035 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1036 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error blocks counted after the outer coding.</para></listitem> 1037 </itemizedlist> 1038 </section> 1039 <section id="DTV-STAT-TOTAL-BLOCK-COUNT"> 1040 <title><constant>DTV-STAT_TOTAL_BLOCK_COUNT</constant></title> 1041 <para>Measures the total number of blocks received during the same period as 1042 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> measurement was taken.</para> 1043 <para>It can be used to calculate the PER indicator, by dividing 1044 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> 1045 by <link linkend="DTV-STAT-TOTAL-BLOCK-COUNT"><constant>DTV-STAT-TOTAL-BLOCK-COUNT</constant></link>.</para> 1046 <para>Possible scales for this metric are:</para> 1047 <itemizedlist mark='bullet'> 1048 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1049 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of blocks counted while measuring 1050 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>.</para></listitem> 1051 </itemizedlist> 1052 </section> 1053 </section> 1054 1055 <section id="frontend-property-terrestrial-systems"> 1056 <title>Properties used on terrestrial delivery systems</title> 1057 <section id="dvbt-params"> 1058 <title>DVB-T delivery system</title> 1059 <para>The following parameters are valid for DVB-T:</para> 1060 <itemizedlist mark='opencircle'> 1061 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1062 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1063 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1064 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1065 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1066 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1067 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1068 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1069 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> 1070 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> 1071 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1072 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1073 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> 1074 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1075 </itemizedlist> 1076 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1077 </section> 1078 <section id="dvbt2-params"> 1079 <title>DVB-T2 delivery system</title> 1080 <para>DVB-T2 support is currently in the early stages 1081 of development, so expect that this section maygrow and become 1082 more detailed with time.</para> 1083 <para>The following parameters are valid for DVB-T2:</para> 1084 <itemizedlist mark='opencircle'> 1085 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1086 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1087 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1088 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1089 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1090 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1091 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1092 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1093 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> 1094 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> 1095 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1096 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1097 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> 1098 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1099 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1100 </itemizedlist> 1101 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1102 </section> 1103 <section id="isdbt"> 1104 <title>ISDB-T delivery system</title> 1105 <para>This ISDB-T/ISDB-Tsb API extension should reflect all information 1106 needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible 1107 that some very sophisticated devices won't need certain parameters to 1108 tune.</para> 1109 <para>The information given here should help application writers to know how 1110 to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para> 1111 <para>The details given here about ISDB-T and ISDB-Tsb are just enough to 1112 basically show the dependencies between the needed parameter values, 1113 but surely some information is left out. For more detailed information 1114 see the following documents:</para> 1115 <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial 1116 Television Broadcasting" and</para> 1117 <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial 1118 Television Broadcasting".</para> 1119 <para>In order to understand the ISDB specific parameters, 1120 one has to have some knowledge the channel structure in 1121 ISDB-T and ISDB-Tsb. I.e. it has to be known to 1122 the reader that an ISDB-T channel consists of 13 segments, 1123 that it can have up to 3 layer sharing those segments, 1124 and things like that.</para> 1125 <para>The following parameters are valid for ISDB-T:</para> 1126 <itemizedlist mark='opencircle'> 1127 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1128 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1129 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1130 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1131 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1132 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1133 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1134 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1135 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1136 <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem> 1137 <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem> 1138 <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem> 1139 <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem> 1140 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem> 1141 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem> 1142 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem> 1143 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem> 1144 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem> 1145 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem> 1146 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem> 1147 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem> 1148 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem> 1149 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem> 1150 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem> 1151 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem> 1152 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem> 1153 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem> 1154 </itemizedlist> 1155 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1156 </section> 1157 <section id="atsc-params"> 1158 <title>ATSC delivery system</title> 1159 <para>The following parameters are valid for ATSC:</para> 1160 <itemizedlist mark='opencircle'> 1161 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1162 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1163 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1164 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1165 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1166 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1167 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1168 </itemizedlist> 1169 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1170 </section> 1171 <section id="atscmh-params"> 1172 <title>ATSC-MH delivery system</title> 1173 <para>The following parameters are valid for ATSC-MH:</para> 1174 <itemizedlist mark='opencircle'> 1175 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1176 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1177 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1178 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1179 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1180 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1181 <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem> 1182 <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem> 1183 <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem> 1184 <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem> 1185 <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem> 1186 <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem> 1187 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem> 1188 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem> 1189 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-PRI"><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></link></para></listitem> 1190 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-SEC"><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></link></para></listitem> 1191 <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem> 1192 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem> 1193 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem> 1194 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem> 1195 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem> 1196 </itemizedlist> 1197 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1198 </section> 1199 <section id="dtmb-params"> 1200 <title>DTMB delivery system</title> 1201 <para>The following parameters are valid for DTMB:</para> 1202 <itemizedlist mark='opencircle'> 1203 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1204 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1205 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1206 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1207 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1208 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1209 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1210 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1211 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1212 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1213 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1214 <listitem><para><link linkend="DTV-INTERLEAVING"><constant>DTV_INTERLEAVING</constant></link></para></listitem> 1215 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1216 </itemizedlist> 1217 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1218 </section> 1219 </section> 1220 <section id="frontend-property-cable-systems"> 1221 <title>Properties used on cable delivery systems</title> 1222 <section id="dvbc-params"> 1223 <title>DVB-C delivery system</title> 1224 <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para> 1225 <para>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</para> 1226 <para>The following parameters are valid for DVB-C Annex A/C:</para> 1227 <itemizedlist mark='opencircle'> 1228 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1229 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1230 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1231 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1232 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1233 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1234 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1235 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1236 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1237 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1238 </itemizedlist> 1239 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1240 </section> 1241 <section id="dvbc-annex-b-params"> 1242 <title>DVB-C Annex B delivery system</title> 1243 <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para> 1244 <para>The following parameters are valid for DVB-C Annex B:</para> 1245 <itemizedlist mark='opencircle'> 1246 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1247 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1248 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1249 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1250 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1251 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1252 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1253 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1254 </itemizedlist> 1255 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1256 </section> 1257 </section> 1258 <section id="frontend-property-satellital-systems"> 1259 <title>Properties used on satellital delivery systems</title> 1260 <section id="dvbs-params"> 1261 <title>DVB-S delivery system</title> 1262 <para>The following parameters are valid for DVB-S:</para> 1263 <itemizedlist mark='opencircle'> 1264 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1265 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1266 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1267 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1268 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1269 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1270 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1271 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1272 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> 1273 <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem> 1274 </itemizedlist> 1275 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1276 <para>Future implementations might add those two missing parameters:</para> 1277 <itemizedlist mark='opencircle'> 1278 <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem> 1279 <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem> 1280 </itemizedlist> 1281 </section> 1282 <section id="dvbs2-params"> 1283 <title>DVB-S2 delivery system</title> 1284 <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para> 1285 <itemizedlist mark='opencircle'> 1286 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1287 <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem> 1288 <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem> 1289 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1290 </itemizedlist> 1291 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1292 </section> 1293 <section id="turbo-params"> 1294 <title>Turbo code delivery system</title> 1295 <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para> 1296 <itemizedlist mark='opencircle'> 1297 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1298 </itemizedlist> 1299 </section> 1300 <section id="isdbs-params"> 1301 <title>ISDB-S delivery system</title> 1302 <para>The following parameters are valid for ISDB-S:</para> 1303 <itemizedlist mark='opencircle'> 1304 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1305 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1306 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1307 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1308 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1309 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1310 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1311 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1312 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> 1313 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1314 </itemizedlist> 1315 </section> 1316 </section> 1317</section> 1318