[aprssig] Why do we not use APRS 9600?

DANA MYERS k6jq at comcast.net
Wed Feb 16 17:02:52 EST 2022

>     On 02/16/2022 1:56 PM Andrew Pavlin via aprssig <aprssig at lists.tapr.org> wrote:

>     Also, WB2OSZ has written a useful whitepaper explaining why 9600 baud is not significantly faster than 1200 baud, so we might get a doubling of throughput at best with the baud rate change, mostly due to preamble/postamble time and lousy TXDELAY capabilities of the radios in use.
>     direwolf/Why-is-9600-only-twice-as-fast-as-1200.pdf at master · wb2osz/direwolf https://github.com/wb2osz/direwolf/blob/master/doc/Why-is-9600-only-twice-as-fast-as-1200.pdf
As usual, John does excellent work here. I remember well the time someone on a rec.radio.amateur.*
newsgroup claimed some single-loop PLL radio worked "flawlessly" on 9600 baud - with a TxDelay of
300mS. I tried explaining why that was a flaw, but he stubbornly repeated "frames got through without
errors". It didn't matter to him the 300mS delay creates a kind of hidden-transmitter syndrome.

Dana  K6JQ

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