[Elecraft] K3 at KH6LC in Stew Warmup

[Bill W4ZV]

Bill W4ZV wrote:
> 
> ???  What firmware were you using.  Everything in the Sub's DSP should
> track the Main when in Diversity mode.  Your comment about filters is also
> confusing.  If you had DSP set to 400 or below, both roofing filters
> should have been 400 Hz.  If just above 400 Hz DSP, you would have had
> 1.8k in the Main and 2.7k in the Sub.  If you didn't like the offset
> effect, you could have disabled the 1.8k in the main so that both 2.7k
> filters would have been enabled above 400 Hz DSP BW.
> 

Just to clarify, see the "###" bracketed comments below:

******************************************************
MCU 2.31 / DSP 1.89, 8-28-08

New Features and Enhancements:
<Snip>
* DIVERSITY RECEIVE MODE: If you have the sub receiver (KRX3 option)
installed, 
you can take advantage of “diversity receive” by using two separate
receiving antennas.
This can improve signal copy during fading, and adds a spatial (L/R) effect
to signals.
###DIVERSITY MODE further enhances this capability by slaving the sub
receiver’s 
mode, filter settings, and VFO to the main receiver.### To enter diversity
mode, hold
SUB until you see “DIVRSTY” on VFO B (about 2 seconds). The kHz decimal
point
of the VFO A display will flash slowly as a reminder that diversity mode is
in effect.
<Snip>
******************************************************

Diversity mode copies Main DSP settings including WIDTH, SHIFT, RIT offsets,
etc. to the Sub.  Of course it cannot correct for different XFILs between
the Main and Sub, but you can disable any filters in Main that are not in
the Sub if desired.  In my case, I have 2.7k/1.8k/500/200 in Main and
2.7k/500 in Sub.  If I set WIDTH to <250 Hz, the 200 will be enabled in Main
but only the 500 will be enabled in Sub.  I have personally not noticed any
warble when using the 200/500 combination even though the filter offsets
differ by 130 Hz (-.91 for the 200 vs -.78 for both 500s).

73,  Bill

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