[hpsdr] CASMIR design v0.4 plus introducing COPERNICUS!

[Lyle Johnson]

> Since from a hardware perspective any reasonable step size from 1Hz to 300Hz (or greater) is attainable, 
> the limits are driven by the capability of the DSP library and the rest of the software. 

The current PowerSDR uses a step of around 3 kHz in spur reduction mode, 
so a step size on the order of 5 kHz may not be unreasonable.

73,

Lyle KK7P


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