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Published 20 hours ago • verified publisher icon mikaelnousiainen

Will not decode on Kenwood TM-D710

Open Reid-n0rc opened this issue 2 years ago • 2 comments

I can get my FT-2DR to decode packets from the RS41ng, but not my Kenwood TM-D710. It was speculated that there could be a pre-emphasis/de-emphasis issue and could explain why one receiver works, while the other does not.

Has pre/de-emphasis been accounted for?

Reid-n0rc avatar Jan 31 '22 12:01 Reid-n0rc

@Reid-n0rc I have a TM-D710G and it does successfully decode APRS, though it is indeed picky about the decoding. The AFSK encoding is really a hack on the sonde (see README for more details), as it can't really do it properly. There is no filtering/emphasis even possible with the hardware, it has not been designed to output AFSK at all.

mikaelnousiainen avatar Feb 18 '22 07:02 mikaelnousiainen

@Reid-n0rc There was actually a bug in the APRS call sign field generation for call signs shorter than 6 characters. This could have been the issue indeed if you used a short call sign like N0RC. Can you try to fetch the latest changes from Git and re-flash your sonde to see if it decodes now?

mikaelnousiainen avatar Feb 20 '22 08:02 mikaelnousiainen