fmscan

Langue: en

Autres versions - même langue

Version: 250411 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)

NAME

fmscan - scan FM band for radio stations

SYNOPSIS

fm [ -h ] [ -d device ] [ -s freq ] [ -e freq ] [ -i freq ]

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.
-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%.
 

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, v4l assumes 1/16 MHz tuning units, which introduces evil rounding errors on many frequencies. If in doubt, grep for VIDEO_TUNER_LOW in your driver's source.

Supports only tuner 0 on any given device.

SEE ALSO

Additional documentation:
/usr/doc/fmtools/README
The fmtools homepage:
http://www.exploits.org/v4l/fmtools.html
The video4linux webpage:
http://roadrunner.swansea.uk.linux.org/v4l.shtml

AUTHORS

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