[time-nuts] Frequency comparrison

[Magnus Danielson]

Dear Bert,

On 11/13/2010 09:24 PM, EWKehren at aol.com wrote:
>
> I agree with Magnus Dual Mixer is the best way to go. That is why over a
> year ago I set out to develop a system that with counter can be realized for
> $200. I did reach that goal and Corby tested the first pass and the second
> pass  with 1 E-13 results. He used his SRS counter. Richard who wrote the
> code for the  five PIC's has tested the counter. What is missing some one
> testing the two  combined. I have a total of seven systems out there some on the
> condition that  they get on it with in two weeks. Sad to say it has not
> happened. I just send  out an other kit this week, maybe we will have more luck
> this time. Once a total  test has been done the third set of boards will be
> ordered and once tested made  available for any one. It measures frequency
> difference and Allan Variance with  a resolution 1E-15 the five channel
> counter runs off USB power and all is needed  is along with the reference is a
> one or ten Hz offset OCXO.

Would be very nice to test.

> I will not mention any names but I would like to remind you what  you
> promised the rest would appreciate the availability of a unit that everybody  can
> build and will be affordable.

200 USD is a good price for such a thing.

> Attached is the picture of the second pass with HP 10514 Mixer  courtesy of
> Corby. There are only two SMD components!
> PS I did send it with a picture attached with 113.3 K hoping my text  would
> not take up space but some how it ended up 160K and is on hold. I will try
> again send only picture!

The picture didn't make it through. If you can put it on a web-page (or 
send it to me and I put it on my web)and provide a link would be beneficial.

Cheers,
Magnus