[Skimmertalk] Modus operandi?

[Clive Whelan]

This will probably look like a pdq, but hey I'm just a CW operator  ;-)

I can see how e.g Skimmer is working in a 3kHz b/w by looking 
sequentially ( or simultaneously?) at all audio tones in the passband 
and using its clever decoding algorithms.

But how does it do this in say a 75kHz b/w ( assuming appropriate rx 
filters) when a sound card with response presumably limited to say 15kHz 
is being used to sample the output? Does it actually sample the passband 
in say 15kHz chunks and remember where it has been?

As well as an academic interest, I am given to wonder whether modern 
receivers with only a 3kHz IF capability could achieve wider coverage ( 
albeit not strictly in real time) by using their own internal scanning 
functions to cover the 75kHz capability of Skimmer?

73

Clive
GW3NJW