smdiag - Linux soundcard packet radio modem driver diagnostics utility
smdiag [-i device] [-d display] [ -ce ]
may help to adjust the audio levels of the soundcard modem driver,
as well as to control the quality of the radio link. It may either display an
oscilloscope like view of the input signal, or display an eye diagram. The
display may be gated with DCD, i.e. only updated if the modem detects a data
accepts the following options:
- The device argument specifies the soundcard modem
device which should be configured or interrogated. It will usually have
the following form: sm[0-3].
- sets the address of the X server to display the
- display an overview of the available command line
parameters and exit.
- toggle the carrier gating of the display.
- display an eye diagram (overlay of the synchronized
demodulator output) instead of an oscilloscope view of the input signal.
- clears the window
- toggles the DCD gating.
- displays an eye diagram
- displays the input signal
- quits smdiag
Reacts sluggishly to keypresses. The window size is fixed. For
speed reasons, two square root operations per sample are not implemented in
the AFSK 1200 baud modes. The eye diagram for the AFSK 1200 baud mode is
smdiag was written by Thomas Sailer (email@example.com).