K3: Spit mode off dial frequency

[Edward R Cole]

I had a strange situation yesterday while running on 2m eme.

I use a sw program called MAP65 which uses JT65 for Tx/Rx.  MAP65
allows one to watch a wide bandspan up to 90-KHz (similar to a
panadaptor).  To operate VFO-A is set to the middle frequency of the
span one wants to observe and one clicks the waterfall display to
chose a particular frequency to operate on.  In order to transmit
there one has to operate split mode so VFO-B controls the Tx.  All
fine so far, but...

Yesterday when I attempted to operate in split mode my actual
transmit frequency was +1.5 KHz from what the dial on VFO-B
showed??  Turning off split and frequency transmitted was what was
shown on VFO-A (which is normal).  I have no offsets set in the
menu?  RIT and XIT were off.

Later I tested the radio on 28-MHz by itself and split mode
transmitted what VFO-B shows on the dial.  But putting the radio back
on 2m (transverter mode) and frequency was off again using split mode.

I used my EIP538 frequency counter to measure transmit frequency
(counter is within 1-Hz of my Rubidium frequency source so very accurate).

Well I found out why this was happening (by exploring my manual).  In
the Menu is a setting called SPLIT SV and it was set=YES.  Turning it
to "NO" removed the offset.  I have no idea what exactly this setting
does but that solved the issue.  I even had penciled it "yes" as the
correct setting back when I got the radio (2010).  SPLIT SV has to do
with something with saving SPLIT, RIT, and XIT by band.

If I have a 2m frequency error its normally corrected by XV1 OFS
setting.  What SPLIT SV accomplishes is beyond me.

73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
     [hidden email]

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[Edward R Cole]

Disregard what I said yesterday.  SPLIT SV function state has no
effect on what I am seeing.

SPLIT mode in DATA-A mode transmits +1.5-KHz higher than VFO-B
displays.  I also ran into something else.  I can not enter SPLIT
frequency mode when in any other modulation mode (SSB/CW/AM/FM) when
operating in transverter mode (i.e. XVn=ON).

Today I operated by tuning VFO-B 1.5 KHz below the intended operating
frequency and I got a report that I was 1-KHz low.  When not in SPLIT
the system transmits on the correct dial frequency (+/- a few Hz).

I guess its time to call Elecraft as this makes no sense at all.

73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
     [hidden email]

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