gtp(4) [netbsd man page]

GTP(4)							   BSD Kernel Interfaces Manual 						    GTP(4)

NAME

     gtp -- Gemtek PCI FM radio device

SYNOPSIS

     gtp*   at pci? flags 0x00
     radio* at gtp?

DESCRIPTION

     The gtp driver provides support for the Gemtek PCI and Guillemot MaxiRadio FM2000 FM radio tuners.

     The Gemtek PCI cards are stereo FM tuners that can tune in the range 87.5 - 108.0 MHz, report signal status and stereo/mono on the current
     frequency, force audio output to mono, perform hardware signal search, and have an internal AFC.

     The card is based on the TEA5757 chip; see radio(4) for details.

     The flags control the driver behavior.  For example, with flags 0x01 the driver will assume that a TEA5759 chip is used.

SEE ALSO

     intro(4), pci(4), radio(4), radio(9)

HISTORY

     The gtp device driver appeared in OpenBSD 3.2 and subsequently in NetBSD 1.6 wherein it replaced the mr(4) driver.

AUTHORS

     The gtp driver and the man page was written by Vladimir Popov <jumbo@narod.ru>.

BUGS

     It is impossible to determine which frequency the card is tuned to.  Thus, the driver will report an internally stored value even if it is
     not correct (changed by some program that uses direct port access).

BSD
								  March 26, 2011							       BSD

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