[aprssig] APRS spec 101

[Scott Miller]

>> it is a simple sum type checksum?
> 
> Nope.  CRC16.

CRC-CCITT16.

> had only an IEEE article and the AX.25 spec to go on.  It took some
> bit twiddling and hair pulling to get it to work.  Scott probably
> had similar experiences.

Yeah, I wrote about some of it here:

http://n1vg.net/packet/

Scott
N1VG