[Elecraft] Struggling with diversity mod

Udo Langenohl - DK5YA dk5ya at dk5ya.de
Tue Aug 11 07:01:36 EDT 2015


Gents,
with the last firmware release I'm struggling with diversity mode. I was 
running diversity for a very long time without any issues on my Xpol EME 
system (144 MHz). The main RX is fed with the H-Pol signal from my 
transverter #1 via KXV3-A, the sub RX is fed with the Vpol signal from 
transverter #2 at AUX input. Both transvertes are in exactly phase by a 
common GPS controlled LO. In diversity mode the signals were stereo at 
line out, with Hpol on left and Vpol at the right channel. It was 
exactly the same on my headphones.

With the latest firmware release there's no stereo signal at line out 
anymore and I recognize that strange "hum hum hum" phase shifting on my 
headphones. On line out there seems to be either a mono signal mixing 
both channels to one or just the main RX on both left and right. I can 
see this clearly on my WSJT system, when Hpol and Vpol signals are 
eaxctly the same now. There's no difference anymore, even that there 
must be some.

When diversity is off and main RX and sub RX are exactly on the same QRG 
things are like they were before: main RX on the left and sub RX on the 
right channel on both line out and headphones.

Anything worng with the latest firmware release, is this a new feature, 
a bug or is it me doing something wrong?

Have no idea.
73 Udo, DK5YA
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