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[aprssig] Looking for 9600 baud equipment

Scott Miller scott at opentrac.org
Sun Sep 28 20:42:22 UTC 2008


I'm not really expecting it to see a lot of mobile use - I'd rather go 
with a lower bit rate and plenty of FEC if I'm going to do that. 
This'll be more for backbone links and email and such, I expect.

But for mobile apps, would GMSK be a better choice?  Maybe at some point 
I'll have multiple options.

Scott
N1VG

Pentti Gronlund wrote:
> Scott Miller writes:
> 
>> My first batch of data radios is due in soon (both VHF and UHF) so I 
>> figure it's about time to start working on 9600 baud support for my next 
>> TNC project.  Right now I've only got a couple of EJ-41Us to work with, 
>> and I'm hoping to find at least a few different TNCs for compatibility 
>> testing.  A KPC-9612 and an original G3RUH modem would be great for 
>> starters.
> 
> 9600 bps G3RUH is not your choice for mobile APRS. It does not cope well
> with multipath phase rotation and flutter.
> 
> Didn't even get the bloody T-shirt...
> 
> Benjamin OH3BK





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