[hpsdr] Horton LO

[Lawrence Stoskopf]

I like this approach.  Potential for Orion-like phase noise.  Years ago I 
bought a SoftWave DSP radio at Dayton, maybe the first PC plug in DSP radio. 
It used the fine tuning at DSP level approach.  Unfortunately that company 
folded and all info went away.  It had good software, written in one of the 
former Iron Curtain countries, including a great data base. 

N0UU
> 
> A few further thoughts about the local oscillator for Horton. 
> 
> We seem to be considering two options:

> 2. Dividing down a GHz oscillator

> Returning to  option 2.  I can't help thinking that if we use a GHz VCO and divide this down to  1-120MHz in say 40kHz steps and then divide by 4 to 
> give us quadrature signals at 10kHz steps then we may be able to do this without the need to resort to Fractional-N techniques.  With 96/192k A/D sampling doing the fine frequency resolution in the DSP code will be fine.

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