[aprssig] FW: Shorten packets! Try TXD=200 ms

[Wes Johnston, AI4PX]

Imagine I'm standing in a room full of people.  I stand on a chair and start
shouting "Attnention everyone!! MAY I HAVE YOUR ATTENTION PLEASE".  Within
the first 5 seconds, most will be quiet.  If I do this for 5 minutes, I'll
shut the stragglers up too.  Then I can speak and be heard.  But we won't
have much thruput if I spend 5 minutes to get everyone to shutup and then
all I say is something short like "Lunch is ready".

We must be careful here that some well meaning individual doesn't extend
this to some exaggerated length of time.
Wes
---
God help those who do not help themselves.


On Tue, Aug 24, 2010 at 12:44, Robert Bruninga <bruninga at usna.edu> wrote:

> > Richard Sharp, KQ4KX has done some testing and
> > concludes that the better setting of TXD for his
> > digipeaters is with a TXD of 180ms.  His testing
> > with a TXD of 150ms at his digipeater measured
> > about 9% of packets were not decoded.  At 170ms
> > just over 2% weren't decoded.  180ms and above
> > was 100%. He was using a D700 for his test receiver.
>
> So lets round up to 200 and see if it works!
> Bob, WB4APR
>
>
>
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