[Elecraft] K3 Diversity Reception Question

Bill W5WVO w5wvo at cybermesa.net
Mon May 28 18:52:55 EDT 2007


Hi Mike,

This was asked and answered three days ago on-list, and is now on the K3 FAQ:

> Q: Is it possible to phase lock the two K3 receivers?
> A: They run off the same reference oscillator and are phase locked.

There is also at least one other FAQ item addressing diversity recpetion.

Bill / W5WVO


Mike Scott wrote:
> Is there one or two local oscillators in a two receiver K3?
> 
> I have been puzzling over the stated ability of the K3 to achieve
> diversity reception (single signal two independent antennas). For
> this to work I believe that the subreceiver 8+ MHz local oscillator
> and the DDS VFO must be in phase lock with the main receiver.
> 
> I think I read that the subreceiver DDS VFO can be slaved to the main
> receiver and I assume this means the two VFOs can be in phase lock.
> 
> I have not read anything about phase locking the local oscillator of
> the sub receiver to the main receiver or if a single local oscillator
> is common to both receivers. If this isn't the case diversity
> reception won't work properly unless the phase difference of the two
> local oscillators is possibly compensated for in the signal
> processing chain. 
> 
> Mike Scott
> 
> AE6WA
> Tarzana, CA
> 
> Elecraft KX1
> 40M Inverted V
> 20M Dipole
> 
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