[Elecraft] K3/KX3 CW Sidetone Pitch

[Don Wilhelm]

Phil,

The CW sidetone is nothing more than a set of math functions inside the DSP.
With the proper DSP code, you can make up most any kind of sound wanted, 
even sidetone mixed with demodulated signals.  That is what the DSP 
board firmware is all about (plus a lot more).

73,
Don W3FPR

On 11/17/2014 4:57 PM, Phil Hystad wrote:
> I am asking this question of K3 and KX3 since I am assuming that the answer is the same for both rigs.  If it is different, maybe someone can let me know.
>
> Question:  Is the CW sidetone generated as a separate audio oscillator circuit or is it generated from a BFO type circuit?  This morning, I started thinking of this question and I realized that I don’t know too much about how CW sidetone is implemented.  I am thinking it is a separate audio oscillator but I may very well be wrong.
>
> Follow up Question:  If the CW sidetone is a separate audio oscillator, what is happening (details preferred) when you use the sidetone to zero beat a CW signal.
>
>