[hpsdr] Horton LO: Further thoughts

[Phil Harman]

Chris,

Thanks for your feedback and contribution. There is nothing better than 
years of practical experience when trying to solve these problems.  As 
Phil_C says, you have given us lots to think about!

I guess that one problem I have is having taken all this time to learn how 
to program FPGAs I want to use them to solve every  problem :).  Your 
suggestion of using existing divider chips is really great.

With input from others I will re-write the previous paper and introduce the 
concepts that have been suggested.

Thanks to all for a most stimulating discussion.


73's Phil...VK6APH


> ***** High Performance Software Defined Radio Discussion List *****
>
> I can see a few potential problems with Phil's proposal:
>
> a/ Trying to make a decent phase-frequency detector in an FPGA isn't going 
> to
> be that easy.
>
> b/ you're handicapping yourselves by using a VHF VCO. To get the near 
> octave
> tuning range required in a VHF VCO with low noise (even with pre-tuning)
> isn't easy, and you'll end-up with some critical analogue design problems.
>



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