f4exb
commented
3 years ago DMR does not support amateur radio callsigns. It is a professional radio communications protocol unlike D-Star (or YSF) that is amateur radio oriented.
If the signal is too noisy some signature sequence can be recognized as D-Star although it is not. There is no way to circumvent this apart from discarding too weak signals or forcing single mode (-f option).
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I have been successful in decoding and listening to the DMR and Dstar examples found in this great tool's "samples/" directory but I found the Yaesu System Fusion example is 100% garbled and/or plays static. To work around this, I tried decoding some local traffic captured from a Kenwood D710's 1200baud data pin into a soundcard but nothing decoded. I then tried saving some audio files via Gqrx v2.6 with an Airspy R2 SDR and that worked fine. I used the following command to get full decoded voice audio:
sox -t s16 -r 48k -L -c 2 gqrx_record-ww6bay-k2wbb-kb5dlx-qso-dr1.wav -t s16 -r 48k -c 1 - | ./dsdccx -v5 -i - -fy -o - 2>/tmp/stderr.txt | play -q -t s16 -r 8k -c 1 -
Unfortunately, no callsigns are seen in the /tmp/stderr.txt file which is something I'm specifically looking for. I DO once callsign decode in the Dstar example file:
samples/dstar_f1zil_1.dis DSTAR HEADER: RPT 2: F1ZIL B RPT 1: F1ZIL B YOUR: CQCQCQ MY: F1NSR /ID51
No callsigns are seen in the the DMR decode. Actually, I do see an attempted Dstar decode for the DMR example which seems like a bug in the tool as why would a DMR decode be showing Dstar info lines?
DSTAR HEADER: RPT 2: څ<94>^?[.tH RPT 1: ^]S<9A>T YOUR: MY: }$^_<8E>/q(
Anyway, is showing callsigns supported in dsdcc? If not, could it be added? Sure would be useful!
--David KI6ZHD