[OZAPRS] 9600 baud

Richard Murnane Richard.Murnane at internode.on.net
Wed Jan 12 08:36:11 EST 2011


Hi Howard,

> Just wondering why we use 1200 baud for APRS and not 9600?

A mix of technical and historical reasons.

At 1200, you can just plug packet gear into mic/speaker sockets of an  
existing radio, without modifying the radio innards. If you want to  
use 9600, you have bypass some of the audio circuitry and get inside  
the radio.

Newer radios can work with 9600, but there is an awful lot of older  
gear out there that still uses 1200, so it's probably not going  
anywhere soon.

73 Richard VK2SKY


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