1SIGLEVDETCAL(1)                  User Manuals                  SIGLEVDETCAL(1)
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NAME

6       siglevdetcal - The SvxLink signal level detector calibration utility
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SYNOPSIS

9       siglevdetcal <configuration file> <RX config section name>
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DESCRIPTION

12       siglevdetcal  is the SvxLink signal level detector calibration utility.
13       It is used to assist in the setup of the SIGLEV_SLOPE and SIGLEV_OFFSET
14       configuration variables for a local receiver. The signal level detector
15       need to be calibrated if a voter or  the  SIGLEV  squelch  detector  is
16       going to be used.
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18       The  calibration  procedure  is  quite simple and everything is more or
19       less explained at run-time. The procedure is outlined below.
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21              · Disconnect the antenna and the PTT cable.  The  PTT  might  be
22                triggered  by  the  siglevdetcal  utility.  If  you want to be
23                really sure that no harm come to your transceiver,  connect  a
24                dummy load.
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26              · Setup the audio input level. The audio input level must not be
27                changed after the calibration has been done.
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29              · Start the siglevdetcal utility.
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31              · Transmit on another radio so that the receiver under  calibra‐
32                tion will receive full signal strength.
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34              · Still  holding the PTT, press ENTER and wait until the squelch
35                open level measurements have been done.
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37              · Release the PTT. Make sure the squelch is open  so  that  only
38                noise is received.
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40              · Press ENTER to start the squelch close level measurements.
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42              · When  finished,  the  two  config  variables  SIGLEV_SLOPE and
43                SIGLEV_OFFSET are printed. Put  these  in  your  configuration
44                file under the corresponding receiver configuration section.
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46              · Start  the SvxLink server and verify that full signal strength
47                is showed as about 100 and open squelch is showed as about  0.
48                If full signal strength is not showed, you might have to setup
49                SQL_DELAY to delay the signal level measurement until the sig‐
50                nal is stable.
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ENVIRONMENT

53       ASYNC_AUDIO_NOTRIGGER
54              Set  this  environment  variable  to 1 if you get an error about
55              ioctl: Broken pipe when the remotetrx server starts.
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AUTHOR

58       Tobias Blomberg (SM0SVX) <sm0svx at users dot sourceforge dot net>
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REPORTING BUGS

61       SvxLink Devel <svxlink-devel at lists dot sourceforge dot net>
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SEE ALSO

64       svxlink(1), remotetrx(1), svxlink.conf(5)
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68Linux                             APRIL 2008                   SIGLEVDETCAL(1)
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