Date: Wed, 20 Oct 93 04:30:01 PDT
From: Advanced Amateur Radio Networking Group <tcp-group@ucsd.edu>
Errors-To: TCP-Group-Errors@UCSD.Edu
Reply-To: TCP-Group@UCSD.Edu
Precedence: Bulk
Subject: TCP-Group Digest V93 #272
To: tcp-group-digest
TCP-Group Digest Wed, 20 Oct 93 Volume 93 : Issue 272
Today's Topics:
9600 TNC's
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Date: Tue, 19 Oct 1993 10:55:17 -0500 (CDT)
From: Steve Sampson <ssampson@sabea-oc.af.mil>
Subject: 9600 TNC's
To: TCP-Group@UCSD.EDU
Earlier this year at Hamcom in Dallas I got to see the
DRSI 9600 modem. Several people have tried it and reports
are very good. It uses pots instead of jumpers like the
G3RUH modem, but is compatible with it. It was selling
for about 210 bucks. That makes it the cheapest and best
performing. I have two Paccomms and they are finicky as
hell concerning deviation, and I've yet to find what jumper
setting works best. Paccomm tried (may still be hawking it)
a 9600 TNC with a Tekk radio in it. A local ham reports the
radio and modem interfere with each other! (too close).
As a non-digital-filter person, I find it difficult to understand
what the jumpers do. I envision them as bandwidth settings, but
suspect they are more complex than that. A radar I worked on
at least gave them numbers (1.0, .7, .5, and .3) and I always
thought of them as bandwidth (1.0 was normal, the others made the
notch narrower (a notch filter as opposed to bandpass) and this
I could understand.
As far as Baycom is concerned, I hope they aren't still using a
PC to do all the work?? It's better to offload this because it's
too much for the PC to be interrupted each bit, rather than each
byte. 9600 interrupts per second :-)
---
73, Steve N5OWK
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End of TCP-Group Digest V93 #272
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