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radioctl(1) [netbsd man page]

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

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)

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: AUTHORS
Russell Kroll <>, now maintained by Ben Pfaff <>. This manpage written by Ben Pfaff. fmscan 1.0.2 FM(1)
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