[aprssig] Error checking within APRS packets

Guido Trentalancia iz6rdb at trentalancia.com
Mon Jun 20 14:25:11 EDT 2011

On 19/06/2011 13:57, Jason KG4WSV wrote:
> On Sun, Jun 19, 2011 at 3:08 AM, Max Harper <kg4pid at yahoo.com 
> <mailto:kg4pid at yahoo.com>> wrote:
>     What type of error checking does APRS have to prevent corrupt data?
> APRS doesn't have any, but APRS is transmitted in AX.25 packets (on 
> VHF, anyway), and AX.25 has a 16 bit checksum (known as the FCS) to 
> verify the data.
And one day perhaps we should add the ability to also correct such 
errors ? For example, the day when we have all moved to speeds greater 
than 1200 (or at most 9600) bits/s...
> -Jason
> kg4wsv

Guido IZ6RDB
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