[Elecraft] K3 LoCut/HiCut

[Nate Bargmann]

* On 2010 24 Nov 14:55 -0600, n6lrv at cox.net wrote:
> Would someone please explain the purpose and function of the low cut and high cut controls on the K3? There doesn't seem to be any explanation I can find in the current user's manual and I'd like to make sure I'm understanding their function correctly because the response I see on the P3 passband icon contridicts what I expected to see occur when increasing or decreasing either setting. Thanks very much.

Gary, it may be easier to visualize each control manipulating a variable
high pass and low pass filter.  The Lo Cut cuts off low frequencies, or
rather, sets the cutoff frequency of a high pass filter.  The Hi Cut
does likewise, except it controls the cutoff frequency of a low pass
filter.  They allow you to adjust either side of the passband 
independently.  You can acheive the same thing with the Width and Shift
controls it's just that the way the K3 is set up using Width works well
on CW as it adjusts both cutoff frequencies but maintains a constant 
center frequency of the passband.  On SSB using either the Lo or Hi Cut
controls can significantly reduce QRM from one side or the other.

On my recently departed FT-920 only the Lo and Hi Cut controls were
available in the DSP.  I like the K3's selection of either way of doing
it depending on the situation.  Over this past SSB Sweepstakes I found
the Lo/Hi Cut indespensible for digging stations from between others.

Experiment!

73, de Nate N0NB >>

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