[aprssig] Re: Unreasonable xmission delay

Robert Bruninga bruninga at usna.edu
Sat Jul 15 13:12:26 EDT 2006


>> Can anyone shed light on what can be done to eliminate 5 minutes of  
>> delay for 100 miles of 3 hops.
>
>All of these digis should be setting DWAIT=0 so that they 
>don't wait for clear air before transmitting.

Gregg,
yes, so true.  There was a lot of bad data out there on setting
up digis in the 1990's and early 2000's that monkied around
with Dwait.  Yes, it has always been supposed to be Dwait=0.
And any setting other than 0 just slows down the network 
trmendously.

Just to clarify, DWait causes the DIGI to key up before any
other USERS' TNC once the channel clears, but the TNC will 
still hold off if the channel is busy already.  DWait only 
comes into play when the channel clears.

So if the channel is busy wall-to-wall, and the TNC is 
set for "channel busy" DCD instead of true data-DCD,
then the DIGI could hold off for minutes at a time
in some high locations..

I still think this is a cause of some of the long delayed
data into FINDU...  But that is just a hunch...
Bob, WB4APR





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