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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
     device.  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
     relative 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 4.9		       October 16, 2008			   OpenBSD 4.9

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