[time-nuts] Digital Mixing with a BeagleBone Black and D Flip Flop

Magnus Danielson magnus at rubidium.dyndns.org
Wed Oct 15 16:23:13 EDT 2014

Hi Simon,

I need to find some spare time, something which is not in rich volumen 
right now.


On 10/15/2014 09:53 AM, Simon Marsh wrote:
> Hi Magnus,
> What was the outcome ? Did it work, and what were the constraints or
> problems encountered ?
> Cheers
> Simon
> On 15/10/2014 00:52, Magnus Danielson wrote:
>> Tom,
>> I think I wrote some VHDL code for a project like this... if I should
>> dig it out again?
>> Cheers,
>> Magnus
>> On 10/14/2014 11:19 PM, Tom Van Baak wrote:
>>> Hi Simon,
>>> Some additional info. I first heard about the D-FF method of
>>> frequency comparison in the late 90's (from Rick Hambly, I think) on
>>> the old gps mailing list. It sounded really interesting. Since then,
>>> the subject has turned up every few years on this list. But each
>>> time, the topic seems to go away quietly with little or no data,
>>> plots or explanation. In addition, none of the commercial products
>>> I've taken apart appear to use this approach. Hmm. So that begs the
>>> question -- what's really going on, and why.
>>> I'm enjoying this thread because you've shown both technical
>>> competence and optimistic persistence. Perhaps once and for all, with
>>> your efforts, we can settle this matter. You will either find a
>>> working combination with excellent performance, or you will uncover
>>> enough uncontrolled variables that you never want to try it again.
>>> Either way, we all learn a lot. Keep the photos, data, and plots coming.
>>> Thanks,
>>> /tvb
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