[TenTec] Omni VI with MMTTY problem

[Duane A Calvin]

Jim,
        Check to be sure you don't have XIT on.  If not, then it would
seem your transmitted tones may not be matching the received tones due to
some change in the setup?  I'm not a MMTTY expert, but if you don't have
an offset when you're operating SSB, then it is most likely something at
the PC end of things.

        73 , Duane


On Thu, 13 Apr 2006 09:45:19 -0500 Jim <jlboockh at earthlink.net> writes:
> I have been successfully using my Omni VI Opt 3 on FSK with MMTTY for 
> a 
> few years now. I recently have developed a problem.
> 
> To call a station, I align the yellow lines on the MMTTY FFT display 
> on 
> the mark and space of the received signal and hit the TX button. 
> Recently, when I do this, my transmitted signal is 300-400 hz away 
> from 
> the received signal. One station mentioned it to me, and others have 
> 
> responded by changing their frequencies to my transmit frequency. 
> This 
> creates a fun exercise as we chase each other around the band. Any 
> ideas 
> what could be causing this?
> 
> I have a problem that may be related. In one of the filter positions 
> I 
> have the 500 hz RTTY filter (#216 I think). For the past few months, 
> the 
> passband of the filter has been skewed to the side of the two yellow 
> 
> lines of the FFT display, making the filter unusable except on the 
> strongest signals. Could this be a related problem?
> 
> I haven't called TT on this yet, since there are people on this 
> reflector who know more than some of the TT technicians. Thanks!
> 
>                         Jim  N4AL
>                         n4al at arrl.net
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Duane Calvin, AC5AA
Austin, Texas