RADIOCTL(1)                OpenBSD Reference Manual                RADIOCTL(1)

NAME
     radioctl - control radio tuners

SYNOPSIS
     radioctl [-anv] [-f file]
     radioctl [-nv] [-f file] name
     radioctl [-n] [-f file] name=value

DESCRIPTION
     The radioctl command displays or sets various variables that affect the
     radio tuner behavior.  If a variable is present on the command line,
     radioctl prints the current value of this variable for the specified de-
     vice.  By default, radioctl operates on the /dev/radio device.

     The options are as follows:

     -a      Print all device variables and their current values.  This is the
             default, if no parameters are given to radioctl.

     -f file
             Specify an alternative radio tuner device.

     -n      Suppress printing of the variable name.

     -v      Show the possible values of queries.

     name=value
             Attempt to set the specified variable name to value.

     Values may be specified in either absolute or relative forms.  The rela-
     tive form is indicated by a prefix of `+' or `-' to denote an increase or
     decrease, respectively.

     The exact set of controls that can be manipulated depends on the tuner.
     The general format (in both getting and setting a value) is:

           name=value

     The name indicates what part of the tuner the control affects.

     Write only controls:

     search  Only for cards that allow hardware search.  Can be `up' or
             `down'.

     Read-write controls:

     channel
             Specifies the TV channel.  Integer value from 0 to 150.  Using
             the channel control puts the tuner in ``TV'' mode.

     chnlset
             Specifies the TV channel set.  The tuner uses the current channel
             set to derive a frequency from the channel.  The following is a
             list of valid channel sets:

                   nabcst       U.S.A. Broadcast
                   cableirc     U.S.A. Cable IRC
                   cablehrc     U.S.A. Cable HRC
                   weurope      Western Europe
                   jpnbcst      Japan Broadcast
                   jpncable     Japan Cable
                   xussr        Former U.S.S.R. and C.I.S. countries
                   australia    Australia
                   france       France

     frequency
             Specifies the FM frequency in MHz.  Float value from 87.5 to
             108.0.  Using the frequency control puts the tuner in ``radio''
             mode.

     volume  Integer value from 0 to 255.

     mute    Mutes the card (volume is not affected), `on' or `off'.

     mono    Forces card output to mono, `on' or `off'.  Only for cards that
             allow forced mono.

     reference
             Reference frequency.  Can be 25 kHz, 50 kHz and 100 kHz.  Not all
             cards allow the reference frequency to be changed.

     sensitivity
             Station locking sensitivity.  Can be 5 mkV, 10 mkV, 30 mkV and
             150 mkV.  Not all cards allow the station locking sensitivity to
             be changed.

     All the remaining controls (mode, signal, stereo and card capabilities)
     are read-only and can be viewed using option -a.

ENVIRONMENT
     The following environment variable affects the execution of radioctl:

     RADIODEVICE  The radio tuner device to use.

FILES
     /dev/radio  radio tuner device

EXAMPLES
     Print all device variables, along with their current values:

           $ radioctl -a
           volume=255
           channel=0
           chnlset=weurope
           frequency=106.30MHz
           mute=off
           reference=50kHz
           signal=on
           stereo=on
           mode: radio
           card capabilities:
                   manageable mono/stereo

SEE ALSO
     radio(4)

HISTORY
     radioctl command first appeared in OpenBSD 3.0.

OpenBSD 4.7                    October 16, 2008                              2
