[Elecraft] K-4 features

[K9MA]

Hi Wayne,

That's the sort of thing I was thinking of. I think Collins did 
something like that back in the 50's. Even if it meant dedicating the 
sub RX to noise detection, it would be worthwhile in high noise 
environments. I've thought of trying to modify the K3 to do something 
like this, but I've never found the K3 NB to be all that effective, even 
when the band was empty.

The above would work in the HDR mode, of course.

I was also wondering if there might be a way to do this with the SDR, 
without tying up the sub RX.

73,
Scott K9MA

On 11/11/2019 10:17, Wayne Burdick wrote:
> Hi Scott,
>
> We could trigger the main RX noise blanker from the sub RX, though we haven't tried this yet. I believe this would achieve what you're describing. For example, the sub RX could be tuned to 13.975 while the main is tuned to the 20 meter CW band.
>
> 73,
> Wayne
> N6KR
>
>
>> On Nov 10, 2019, at 7:12 PM, K9MA <k9ma at sdellington.us> wrote:
>>
>> On 11/10/2019 19:06, Wayne Burdick wrote:
>>> The K4, being an SDR, provides access to a different class of wide-band NR and NB algorithms.
>> Some hardware noise blankers are very effective at reducing line noise and other impulse-type noise, provided there are no strong signals within the 15 kHz + NB bandwidth. (My old FT-1000D, for example.) With appropriate firmware, could the K4 NB achieve that kind of performance? Could the strong signal limitation be overcome by having the SDR detect noise in a slightly different frequency range, like just outside a ham band during a contest?
>

-- 
Scott  K9MA

k9ma at sdellington.us