[Elecraft] Diversity Receive as Noise Cancelling

[Guy Olinger K2AV]

The problem with "automatic" is that it needs to know what out of the
composite signal you are getting do you want nullified.  You will
still need manual input for this.  Further, this is in effect only on
the frequency you are on.  Only RF cancellation has the broadband
nullification.

73, Guy.

On Tue, Nov 30, 2010 at 2:26 PM, Erik Basilier <ebasilier at cox.net> wrote:
> 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
>
>
>
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