1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Querying frontend status and statistics</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_frontend.html" title="Chapter 9. DVB Frontend API"><link rel="next" href="frontend-properties.html" title="DVB Frontend properties"></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">Querying frontend status and statistics</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="dvb_frontend.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-properties.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="dvb-fe-read-status"></a>Querying frontend status and statistics</h2></div></div></div><p>Once <a class="link" href="FE_GET_PROPERTY.html" title="ioctl FE_SET_PROPERTY, FE_GET_PROPERTY"><code class="constant">FE_SET_PROPERTY</code></a>
2    is called, the frontend will run a kernel thread that will periodically
3    check for the tuner lock status and provide statistics about the quality
4    of the signal.</p><p>The information about the frontend tuner locking status can be queried
5    using <a class="link" href="FE_READ_STATUS.html" title="ioctl FE_READ_STATUS">FE_READ_STATUS</a>.</p><p>Signal statistics are provided via <a class="link" href="FE_GET_PROPERTY.html" title="ioctl FE_SET_PROPERTY, FE_GET_PROPERTY"><code class="constant">FE_GET_PROPERTY</code></a>.
6    Please note that several statistics require the demodulator to be fully
7    locked (e. g. with FE_HAS_LOCK bit set). See
8    <a class="link" href="frontend-properties.html#frontend-stat-properties" title="Frontend statistics indicators">Frontend statistics indicators</a>
9    for more details.</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="dvb_frontend.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-properties.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 9. DVB Frontend API </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> DVB Frontend properties</td></tr></table></div></body></html>
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