[Elecraft] Diversity Receive as Noise Cancelling

[Erik Basilier]

AB7E wrote:

 

>a.  Elecraft to make the phase lock between the two receivers remain
constant as the frequency is changed.  >Ideally the phase differential of
the local oscillators would be zero ... either forced that way by the DSP or
>by using the same L.O. for both receivers.  If that wasn't possible, it
would still be usable if the >differential were known or could be
interrogated by a command.

> 

>b.  Someone to write a simple bit of software for the computer that took
the sound card inputs, shifted and >processed them, and then feed them back
out through the sound card to headphones or speakers.

 

As far as I remember from the K3 block diagram, each receiver has its own
DSP that feeds one AF channel, and each DSP has no knowledge of what goes on
in the other DSP. If this is a correct understanding, then the K3 DSP would
need operator input to change amplitude and phase in order to cancel noise.
Doing the job in a computer sound card and CPU would have a distinct
advantage in that adjustment of phase and amplitude could be automatic.

 

73,

Erik K7TV