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Best RX decode performance AFSK 300bps


 

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Have been going through the docs on this and now decoding quite weak/noisy signals, quite interesting. Want to make sure I have covered everything else that "may not be documented". Most of the 14105 chatter here is marginal. Using latest 1.8.

I haven't found an understandable explanation on the term "slicers" yet. I am using the older format;

MODEM 300 1600:1800 B- 5@30 /1

ie what are the merits of using (say) B+ or even A+ instead. I see 9 "modems" on the log display with that (eg ___||||__). Has there been new modem development since 1.7? Might be nice to see a list of current modems (and summary) available.

FX25 and "FIX_BITS 1 AX25" also works well. Seeing quite a few recoveries. Am TXing 16.

Am wondering how important audio input level setting (and even sampling division rate) is in regard to quantisation errors and dynamic range. If so is there a debug option that shows the occupied bit width, or is this what "audio level" actually logs?

Cheers Bob VK2YQA

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