1SIGLEVDETCAL(1) User Manuals SIGLEVDETCAL(1)
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6 siglevdetcal - The SvxLink signal level detector calibration utility
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9 siglevdetcal <configuration file> <RX config section name>
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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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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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58 Tobias Blomberg (SM0SVX) <sm0svx at users dot sourceforge dot net>
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61 SvxLink Devel <svxlink-devel at lists dot sourceforge dot net>
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64 svxlink(1), remotetrx(1), svxlink.conf(5)
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68Linux APRIL 2008 SIGLEVDETCAL(1)