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[aprssig] Dupe Checking....

Steve Dimse steve at dimse.com
Wed Oct 3 23:51:35 UTC 2007


On Oct 3, 2007, at 7:20 PM, Doug Ferrell, KD4MOJ wrote:

>   Question is... does dupe check only check the callsign or the data
> contained in the packet?

Both. There are many reasons why a station sends two packets at once,  
for example with a message packet and position, or positionless  
weather and position, etc.

>
> 	Local trackers are sometimes pinging every 10 seconds depending if  
> they are
> driving around in the local supermarket. By the time they have hit  
> the two

Anyone doing that needs to be educated. a 10 second transmit rate  
will saturate a channel with even a single digi.

Three minutes is the fastest recommended rate, and even that is too  
fast for most mobiles and trackers.

Steve K4HG




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