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radioctl(1) [netbsd man page]

RADIOCTL(1)						    BSD General Commands Manual 					       RADIOCTL(1)

NAME

     radioctl -- control radio tuners

SYNOPSIS

     radioctl [-f file] [-n] -a
     radioctl [-f file] [-n] name
     radioctl [-f file] [-n] -w 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.

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

     -f file
	     Specify an alternative radio tuner device.

     -n      Suppress printing of the variable name.

     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:

     frequency
	     Float value from 87.5 to 108.0.

     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 to change the reference frequency.

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

     All the remaining controls (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

     The command

	   radioctl -a

     can produce

     volume=255
     frequency=106.30MHz
     mute=off
     reference=50kHz
     signal=on
     stereo=on
     card capabilities:
	     manageable mono/stereo

SEE ALSO

     radio(4)

HISTORY

     radioctl command first appeared in OpenBSD 3.0 and NetBSD 1.6.

BSD
								September 16, 2001							       BSD

Check Out this Related Man Page

FM(1)							      General Commands Manual							     FM(1)

NAME

       fmscan - scan FM band for radio stations

SYNOPSIS

       fm [ -h ] [ -d device ] [ -t tuner ] [ -s freq ] [ -e freq ] [ -i freq ] [ -q ]

DESCRIPTION

       fmscan  is a program to scan a frequency band for radio stations, using the video4linux interface introduced in 2.1.x series Linux kernels.
       It shows which ones have a accumulated signal strength of 50% or higher.

   OPTIONS
       -h     Print a usage message to standard output, and exit.

       -d device
	      Sets device as the device to tune.  The default is /dev/radio0.

       -t tuner
	      Sets tuner as the tuner on the selected device to adjust.  The default is tuner 0.  Most radio devices have only a single tuner.

       -s freq
	      Starting frequency for scan, in MHz.  Default: 87.9.

       -e freq
	      Ending frequency for scan, in MHz.  Default: 107.9.

       -i freq
	      Increment between scanned channels, in MHz.  Default: 0.2.

       -t percent
	      Signal strength threshold to consider a channel.	Default: 50%.

       -q     Quiet mode.  Suppresses progress output.

BUGS

       This process can take a while, and results vary greatly depending on the radio card in use.  If your card's hardware cannot  report  signal
       strength, it will not produce useful results.

       This program may not do much if your radio card's driver doesn't support fine tuning in 1/16000 MHz offsets.  By default, V4L2 assumes 1/16
       MHz tuning units, which introduces evil rounding errors on many frequencies.

       Supports only tuner 0 on any given device.

SEE ALSO

       Additional documentation:
	      /usr/doc/fmtools/README

       The fmtools homepage:
	      http://benpfaff.org/fmtools

AUTHORS

       Russell Kroll <rkroll@exploits.org>, now maintained by Ben Pfaff <blp@cs.stanford.edu.>. This manpage written by Ben Pfaff.

								   fmscan 1.0.2 							     FM(1)
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