[Elecraft] K3: data modes - bizarre behavior

[W4GRJ]

I use RMS Express Winmor,  DSM780 & FlDigi MT63, Airmail Pactor and MIL110A, they all work perfect with the rig left in USB.

Jack
W4GRJ / AFA4DG

On Jan 2, 2012, at 3:43, Richard Ferch <ve3iay at storm.ca> wrote:

> W4GRJ wrote:
> 
>> Just leave the K3 in USB, do not change to data mode. RMS Express will set to
>> the correct freq. You will not have to make any adjustments.
> 
> If this is correct, and RMS Express tunes to the correct frequency in 
> USB mode but not in DATA A mode, then there may be an error in RMS 
> Express. DATA A is exactly the same as USB except for disabling 
> compression and EQ and the default choice of input audio path (line in 
> instead of microphone). In particular, the frequency display in DATA A 
> and USB is the same. A setup that works in USB should work in DATA A 
> without changes.
> 
> What I suspect might be happening is that RMS Express might be 
> programmed to handle DATA A as if it were a USB version of AFSK A. In 
> AFSK A, the K3's dial displays the RTTY mark frequency, whereas in DATA 
> A the dial displays the suppressed carrier frequency. If the RMS Express 
> programmers assumed that in DATA A the radio's indicated frequency was 
> the center of the bandpass instead of the suppressed carrier frequency, 
> they would program it to tune the radio 1.5 kHz too high in DATA A.
> 
> 73,
> Rich VE3KI
> 
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