[Elecraft] K3/MMTTY/Signalink Problem

[paul ecker via Elecraft]

I have the Pitch in AFSK set the same as the mark in MMTTY. I am using Signalink USB external sound card and the K3 and MMTTY.

But the question remains, if I set K3 mode to AFSK I get no power out or no Diddles. With Data A I do get power out and Diddles. Why is that ??  Even though using Data A I get some power out , why the lower power then what I have the K3 set out ??
73 Paulkc2nyu
      From: Don Wilhelm <w3fpr at embarqmail.com>
 To: paul ecker <eckerpw at yahoo.com>; "elecraft at mailman.qth.net" <elecraft at mailman.qth.net> 
 Sent: Tuesday, October 14, 2014 5:39 PM
 Subject: Re: [Elecraft] K3/MMTTY/Signalink Problem
   
 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?