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-<refentry id="FE_SET_TONE">
- <refmeta>
- <refentrytitle>ioctl FE_SET_TONE</refentrytitle>
- &manvol;
- </refmeta>
-
- <refnamediv>
- <refname>FE_SET_TONE</refname>
- <refpurpose>Sets/resets the generation of the continuous 22kHz tone.</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcprototype>
- <funcdef>int <function>ioctl</function></funcdef>
- <paramdef>int <parameter>fd</parameter></paramdef>
- <paramdef>int <parameter>request</parameter></paramdef>
- <paramdef>enum fe_sec_tone_mode *<parameter>tone</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Arguments</title>
- <variablelist>
- <varlistentry>
- <term><parameter>fd</parameter></term>
- <listitem>
- <para>&fe_fd;</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><parameter>request</parameter></term>
- <listitem>
- <para>FE_SET_TONE</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><parameter>tone</parameter></term>
- <listitem>
- <para>pointer to &fe-sec-tone-mode;</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1>
- <title>Description</title>
-
-<para>This ioctl is used to set the generation of the continuous 22kHz tone.
- This call requires read/write permissions.</para>
-<para>Usually, satellite antenna subsystems require that the digital TV
- device to send a 22kHz tone in order to select between high/low band on
- some dual-band LNBf. It is also used to send signals to DiSEqC equipment,
- but this is done using the DiSEqC ioctls.</para>
-<para>NOTE: if more than one device is connected to the same antenna,
- setting a tone may interfere on other devices, as they may lose
- the capability of selecting the band. So, it is recommended that
- applications would change to SEC_TONE_OFF when the device is not used.</para>
-
-&return-value-dvb;
-</refsect1>
-
-<refsect1 id="fe-sec-tone-mode-t">
-<title>enum fe_sec_tone_mode</title>
-
-<table pgwide="1" frame="none" id="fe-sec-tone-mode">
- <title>enum fe_sec_tone_mode</title>
- <tgroup cols="2">
- &cs-def;
- <thead>
- <row>
- <entry>ID</entry>
- <entry>Description</entry>
- </row>
- </thead>
- <tbody valign="top">
- <row>
- <entry align="char" id="SEC-TONE-ON"><constant>SEC_TONE_ON</constant></entry>
- <entry align="char">Sends a 22kHz tone burst to the antenna</entry>
- </row><row>
- <entry align="char" id="SEC-TONE-OFF"><constant>SEC_TONE_OFF</constant></entry>
- <entry align="char">Don't send a 22kHz tone to the antenna
- (except if the FE_DISEQC_* ioctls are called)</entry>
- </row>
- </tbody>
- </tgroup>
-</table>
-</refsect1>
-
-</refentry>