[Elecraft] K3/MMTTY/Signalink Problem

[Don Wilhelm]

Paul,

There are subtle differences between DATA A and AFSK A.  You may want to 
review the K3 manual section on data modes for additional information.

First, DATA A sets the K3 to USB mode by default where AFSK A uses LSB 
by default.
DATA A can transmit and receive anywhere within the audio frequency 
range (unless the filters are narrowed).  AFSK A uses narrow filters by 
default.
Secondly, in DATA A, the K3 frequency shown is the suppressed carrier 
frequency.
In AFSK A the frequency displayed is the RTTY mark frequency. Convention 
when referring to the frequency of an RTTY signal, the MARK frequency is 
specified - that is helpful for scheduled contacts - no mental math from 
a waterfall display, it is right there on the K3 display.


Because of the latter two conditions, you must have the 'PITCH' set in 
AFSK A to the same as the mark frequency that you have set in MMTTY.  
The K3 uses narrow filters for AFSK A in both transmit and receive, so 
if you do not have both MMTTY and the K3 set to agree with those tones, 
the signal may not get through the K3 filters. Once you have things set 
properly, it should proceed smoothly.

When using AFSK A, you would tune in the signal using the K3 VFO rather 
than clicking on a waterfall.  That works great with MMTTY. If you 
prefer working with a waterfall display and clicking on a signal, you 
may find more comfort using FLDIGI or some data mode application other 
than MMTTY.

73,
Don W3FPR

On 10/14/2014 4:56 PM, paul ecker wrote:
> Thanks for all the inputs on my question.
> I have made some progress. I changed the K3 mode from AFSK to Data A, 
> and in MMTTY have"Rev" selected. I am now upon TX getting power out, 
> movement on the ALC meter (4 bars with 5th flickering, mic line set at 
> 31) and hearing Diddles. So MMTTY is working for TX and RX better than 
> before, and I had a QSO a bit ago with W1AW/4.
> - However with K3 power set at 85w, I am only  showing 30w power out 
> on both K3 RF meter and on the KPA digital readout.
> - Also as I understand it Signalink does AFSK, so why does it appear 
> to be working in DATA A. Does the Data A mode selection have something 
> to do with the reduced power out?
>