As long as Eric has requested an end to this thread, perhaps we should move it 
to the Yahoo group.  It is unfortunate that certain topics on this reflector 
are like being a long-tail cat in a room full of rocking chairs.

As a final comment;  I haven't used ESSB,  but the option was one of the things 
that influenced my decision to buy a K3.  It adds to it's capability.  

Rich, n0ce

  ----- Original Message ----- 
  From: Matthew Zilmer 
  To: [email protected] 
  Sent: Monday, January 28, 2013 12:30 PM
  Subject: [Elecraft] K3 ESSB question - data modes


  In MARS, we use a mil data mode called M110A which requires 3 KHz of TX and 
RX audio bandwidth to achieve a low error rate at the higher bitrates (2400 and 
4800).  I've been trying it using DATA A, but error rates on the RX side (for 
non-K3 RXs) is still higher than acceptable.  I'm assuming that the K3's TX and 
RX audio characteristics would be the same when using 3.0 KHz in ESSB.  Since 
we have at least two Navy-Marine Corps MARS members in SCA with K3s, I was 
going to test RX error rate with each RX set up on ESSB 3.0, while my K3 was 
set up the same way for TX.

  Another way to assess usability is to run the N-GEN into the K3 RX while in 
ESSB 3.0.  The output audio spectrum should show a clean audio band.  Has 
anyone in this group done this already?  If so, could I get a copy of the 
results?

  73 and Thanks,

  Matt Zilmer, W6NIA/NNN0UET SCA


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