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On 02/16/2022 2:19 PM david vanhorn <kc6ete@gmail.com> wrote:
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Why is 9600 the magic number?
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1200 sucks, but 2400 and 4800 suck proportionally less, and are proportionally more difficult.
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No particular reason to stay in the standard baud rates either. 3200 might be the sweet spot.
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By the time you go to the trouble to make anything faster than 1200 baud work -
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which means finding the flat audio in/out path to the discriminator/transmitter - you
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might as well do 9600, which fits in a standard NBFM channel.
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Multi-level modulation schemes are neat, but require good end-to-end linearity
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for decent performance. 9600 GMSK probably IS the sweet spot.
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73,
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Dana K6JQ
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