[amsat-bb] Re: TS-790 doppler compensation via CAT

Erich Eichmann erich.eichmann at t-online.de
Fri Oct 13 23:06:18 PDT 2006

Hello Gabriel,
it is not the software that requires modifications of the TS-790E/A. You can
steer the radio with SatPC32 for Doppler correction without any
modification. The problem is that the RX is mute for about 100 mSec
when a CAT command is sent to the radio. That is a peculiarity of the radio
and regardless of the software. With FM voice repeaters that will be no
problem. With SSB satellites however it can be one. To tune the radio via
mouse or keyboard requires a sequence of  CAT commands, to tune it via the
VFO knob requires to poll the RX VFO in short periods.  So the RX will be
mute for some time. Perhaps you test that yourself.

The solution I mentioned in the instruction file for that radio comes from

 73s, Erich, DK1TB

----- Original Message ----- 
From: "Gabriel - EA6VQ" <ea6vq_ml at vhfdx.net>
To: <AMSAT-BB at amsat.org>
Sent: Friday, October 13, 2006 8:25 PM
Subject: [amsat-bb] TS-790 doppler compensation via CAT

> I'm sure this question must have been posted before, but I 'm new to
> AMSAT-BB so I would appreciate your answers.
> Is there some software for the Kenwood TS-790 that is capable or
> compensating the doppler?
> I am aware of the PcSAT32, but it requires modifiying the rig, what is
> something I really would like to avoid.
> Anyone advice will be welcome. Many thanks!
> 73. Gabriel - EA6VQ
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