SMDIAG(8) Linux Programmer's Manual SMDIAG(8)NAME
smdiag - Linux soundcard packet radio modem driver diagnostics utility
SYNOPSIS
smdiag [-i device] [-d display] [ -ce ]
DESCRIPTION
smdiag 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 carrier.
OPTIONS
smdiag accepts the following options:
-i The device argument specifies the soundcard modem device which should be configured or interrogated. It will usually have the fol-
lowing form: sm[0-3].
-d sets the address of the X server to display the window.
-h display an overview of the available command line parameters and exit.
-c toggle the carrier gating of the display.
-e display an eye diagram (overlay of the synchronized demodulator output) instead of an oscilloscope view of the input signal.
KEYS
C clears the window
D toggles the DCD gating.
E displays an eye diagram
I displays the input signal
Q quits smdiag
BUGS
smdiag Reacts sluggishly to keypresses. The window size is fixed. For speed reasons, two square root operations per sample are not imple-
mented in the AFSK 1200 baud modes. The eye diagram for the AFSK 1200 baud mode is therefore distorted.
SEE ALSO
smmixer (8), sethdlc (8), linux/drivers/net/soundmodem.c
AUTHOR
smdiag was written by Thomas Sailer (t.sailer@alumni.ethz.ch).
Smdiag 0.1 1 October 1996 SMDIAG(8)
Check Out this Related Man Page
SMMIXER(8) Linux Programmer's Manual SMMIXER(8)NAME
smmixer - get/set Linux soundcard packet radio modem driver mixer
SYNOPSIS
smmixer [-i device] [ params ]
DESCRIPTION
smmixer displays and/or sets the input source and input and output levels of a soundcard modem port.
OPTIONS
smmixer accepts the following option:
-i The device argument specifies the soundcard modem device which should be configured or interrogated. It will usually have the fol-
lowing form: sm[0-3].
PARAMETERS
The AD1848 (WSS) mixer accepts the following parameters:
ol=val sets the level of the left output to the specified value. Legal values are from -100..0dB.
or=val sets the level of the right output to the specified value. Legal values are from -100..0dB.
o=val sets the level of both outputs to the specified value. Legal values are from -100..0dB.
il=val sets the level of the left input to the specified value. Legal values are from 0..43dB.
ir=val sets the level of the right input to the specified value. Legal values are from 0..43dB.
i=val sets the level of both inputs to the specified value. Legal values are from 0..43dB.
sl=val sets the source of the left input to the specified value. Legal values are line, aux1, mic or dac.
sr=val sets the source of the right input to the specified value. Legal values are line, aux1, mic or dac.
s=val sets the source of both inputs to the specified value. Legal values are line, aux1, mic or dac.
The CT1335 (SB2.x) mixer accepts the following parameter:
o=val sets the output level to the specified value. Legal values are from -46..0dB.
The CT1345 (SBPro) mixer accepts the following parameters:
ol=val sets the level of the left output to the specified value. Legal values are from -46..0dB.
or=val sets the level of the right output to the specified value. Legal values are from -46..0dB.
o=val sets the level of both outputs to the specified value. Legal values are from -46..0dB.
s=val sets the input source to the specified value. Legal values are mic, cd or line.
The CT1745 (SB16, SB32 AWE) mixer accepts the following parameters:
ol=val sets the level of the left output to the specified value. Legal values are from -62..18dB.
or=val sets the level of the right output to the specified value. Legal values are from -62..18dB.
o=val sets the level of both outputs to the specified value. Legal values are from -62..18dB.
il=val sets the level of the left input to the specified value. Legal values are from -62..18dB.
ir=val sets the level of the right input to the specified value. Legal values are from -62..18dB.
i=val sets the level of both inputs to the specified value. Legal values are from -62..18dB.
s=val enables the specified value as a source. Legal values are line, line.l, line.r, midi, midi.l, midi.r, cd, cd.l, cd.r or mic.
CONSIDERATIONS
It is important that the audio levels of your radio match those of the soundcard. To help achieve this, use the smdiag utility.
This utility can only be used after the interface is started up, i.e. after ifconfig sm? up.
The sound driver and the soundcard modem driver are mutually exclusive, i.e. they cannot both access the same soundcard at the same time.
Even worse, the sound driver reserves the soundcard as soon as it gets loaded. The souncard modem driver however reserves the card only
when the interface is started, i.e. during ifconfig if up.
9600 baud may not currently work on SoundBlaster cards with DSP revision 4.x, i.e. SB16 and SB32 AWE. This is because they seem to not be
fully backwards compatible.
SEE ALSO
smdiag (8), sethdlc (8), linux/drivers/net/soundmodem.c
AUTHOR
smmixer was written by Thomas Sailer (t.sailer@alumni.ethz.ch).
Smmixer 0.1 1 October 1996 SMMIXER(8)