[Elecraft] KX2/3 DSP AM Demodulation

[K9MA]

On 9/9/2017 21:35, Fred Jensen wrote:
>  A DC receiver converts the signal once to audio.  Regardless of the 
> mechanics [which these days can get very complex], that's really all 
> there is.

Ah, but the only way direct conversion can convert AM to audio, without 
some kind of fancy DSP stuff, is to phase lock the conversion oscillator 
to the carrier.  My KX2 doesn't sound like it's doing that when I tune 
across a signal; it sounds more like a conventional superhet AM 
receiver.  I'm trying to figure out how you take the I and Q mixer 
baseband ("audio") outputs of an AM signal and convert them to audio, 
and in a way that works when the carrier is not exactly zero beat.

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us