\" $NetBSD: radioctl.1,v 1.3 2002/01/01 22:48:18 wiz Exp $
\" $OpenBSD: radioctl.1,v 1.4 2001/12/06 10:14:32 mickey Exp $
\"
\" Copyright (c) 2001 Vladimir Popov
\" All rights reserved.
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\" modification, are permitted provided that the following conditions
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Dd September 16, 2001
Dt RADIOCTL 1
Os
Sh NAME
Nm radioctl
Nd control radio tuners
Sh SYNOPSIS
Nm radioctl
Op Fl f Ar file
Op Fl n
Fl a
Nm radioctl
Op Fl f Ar file
Op Fl n
Ar name
Nm radioctl
Op Fl f Ar file
Op Fl n
Fl w
Ar name=value
Sh DESCRIPTION
The
Nm
command displays or sets various variables that affect the radio tuner
behavior. If a variable is present on the command line,
Nm
prints the current value of this variable for the specified device.
By default,
Nm
operates on the
Pa /dev/radio
device.
Pp
The options are as follows:
Bl -tag -width Ds
It Fl a
Print all device variables and their current values.
It Fl w Ar name=value
Attempt to set the specified variable
Ar name
to
Ar value .
It Fl f Ar file
Specify an alternative radio tuner device.
It Fl n
Suppress printing of the variable name.
El
Pp
Values may be specified in either absolute or relative forms.
The relative form is indicated by a prefix of
Ql +
or
Ql -
to denote an increase or decrease, respectively.
Pp
The exact set of controls that can be manipulated depends on
the tuner.
The general format (in both getting and setting a value) is
Pp
Va name = value
Pp
The
Va name
indicates what part of the tuner the control affects.
Pp
Write only controls:
Bl -tag -width search
It search
Only for cards that allow hardware search. Can be
Ql up
or
Ql down .
El
Pp
Read-write controls:
Bl -tag -width volume
It frequency
Float value from 87.5 to 108.0.
It volume
Integer value from 0 to 255.
It mute
Mutes the card (volume is not affected),
Ql on
or
Ql off .
It mono
Forces card output to mono,
Ql on
or
Ql off .
Only for cards that allow forced mono.
It reference
Reference frequency. Can be 25 kHz, 50 kHz and 100 kHz. Not all cards allow
to change the reference frequency.
It 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.
El
Pp
All the remaining controls (signal, stereo and card capabilities) are read-only
and can be viewed using option
Fl a .
Sh ENVIRONMENT
The following environment variable affects the execution of
Nm radioctl :
Bl -tag -width RADIODEVICE
It Ev RADIODEVICE
The radio tuner device to use.
El
Sh FILES
Bl -tag -width /dev/radio
It Pa /dev/radio
radio tuner device
El
Sh EXAMPLES
The command
Pp
Dl "radioctl -a"
Pp
can produce
Bd -literal
volume=255
frequency=106.30MHz
mute=off
reference=50kHz
signal=on
stereo=on
card capabilities:
manageable mono/stereo
Ed
Sh SEE ALSO
Xr radio 4
Sh HISTORY
Nm
command first appeared in
Ox 3.0
and
Nx 1.6 .
