[time-nuts] Measuring 10 MHz accurately.

SAIDJACK at aol.com SAIDJACK at aol.com
Wed May 7 16:51:37 EDT 2008

Hi Martyn,
you may be able to use a Wavecrest DTS-2070 or better DTS-2075 Time  Interval 
Analyzer for this.

It has up to 40K samples/second capture capability, with  +/-25ps single-shot 
accuracy, <<10ps RMS noise,  and 800  Femtoseconds resolution.
If you can capture the data via GPIB, you should be able to calculate  better 
than 1E-012 per second with the massive over-sampling the unit  can do.
These used to cost $60K+, now you can get them for $500 on Ebay.
In a message dated 5/7/2008 09:53:29 Pacific Daylight Time,  
martyn at ptsyst.com writes:

I really  need to measure 10 MHz to an accuracy of 1 part in 10E-13 / second  
(ignoring the accuracy of my workshop standard).  I've tried  multiplying the 
10 MHz to the GHz frequencies, but never manage to improve  on the technique 
I mention in my first question.

Any ideas for a  relatively cheap way of doing this.  I actually represent a 
company  that can measure to parts in 10E-15 in one second, but their boxes 
costs  $50k.

Best  Regards


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