[aprssig] Interesting Preliminary Findings on Soundcard "Soft TNC" Shootout

[Stephen H. Smith]

On 12/26/2011 10:35 AM, Steve Noskowicz wrote:
> Steve,
>
>   This is a well done test and report and expected based on what I know of your experience.  One question is how many good packets in a row did you consider to be at the "consistently decoding the packet burst" point?

I considered successfully decoding 10 successive packets as being "always".

In all cases, the next dB step down yielded about 20-30% decode successes, 
except for the UZ7HO at 300 baud where the dB step below "always" still yielded 
70-80% decodes.

I.e. the "cliff" between "always" and "mostly failing" is surprisingly abrupt, 
not at all like the perceived "gradually getting noisier" one experiences on 
voice as the signal weakens.


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Stephen H. Smith    wa8lmf (at) aol.com
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