[Elecraft] K3 LoCut/HiCut

[Ramiro Aceves]

Hi all

Changing HI/LO, SHIFT/WIDTH produce a few Hz change in the tunning 
frequency. Obviously it does not matter but here we have the waterfall:

http://ea1abz.ure.es/Hz-change.png

73, Ramiro.



Nate Bargmann escribió:
> * On 2010 24 Nov 16:04 -0600, Ramiro Aceves wrote:
>> Hi K3 fans
>>
>> Speaking about HI and LO Cut controls. I have notice this:
>>
>> Tune a carrier at for example, 1 KHz tone.
>> Set a computer waterfall with enough frequency resolution to see  few Hz 
>> changes
>> Play with HI and LO Cut controls up and down (of course, let the 1 KHz 
>> signal pass trough the filter).
>>
>> Result, the carrier frecuency will be shifted by a few Hz.
>>
>> Do you hace same results in your K3?
> 
> Yes.  If you don't want FC to change, switch to the Width/Shift controls.
> It's a feature, not a bug (TM).
> 
>> Do Low and Hi Cut controls only have effect on the DSP filters?
> 
> I would presume so as my understanding is that all of this "magic" takes
> place in the DSP and the crystal filters operate at a fixed offset, if
> required.
> 
> 73, de Nate N0NB >>
>