[time-nuts] Picket fence technique

[Dr Bruce Griffiths]

Didier Juges wrote:
> Dr Bruce Griffiths wrote:
>   
>> Using a GPS timing receiver to quantify the long term stability of an 
>> oscillator whose frequency is not a harmonic of 1Hz, then the technique 
>> of dividing the oscillator frequency down to 1Hz and logging the time 
>> delay between the GPS derived PPS pulse and the leading edge of the 
>> divided down reference frequency will incur several phase wraps during 
>> the monitoring period. Worse than this if one is using a TIC with a 
>> finite dead time (eg HP5370A/B) between measurements some the TIC will 
>> not measure some of these intervals.
>>
>> These difficulties can be circumvented by using a picket fence technique 
>> as devised by Greenhall to measuring beat frequencies in the paper:
>>
>> A Method for Using a Time Interval Counter
>> to Measure Frequency Stability
>> C. A. Greenhall
>> Communications Systems Research Section
>>     
>
>   
>> ...
>>   
>>     
>
>   
>> Bruce
>>
>>   
>>     
> Bruce,
>
> I suppose you are referring to this paper?
>
> http://horology.jpl.nasa.gov/papers/picket_uffc.pdf
>
> Didier
>
>
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>   
Didier

Essentially, although the version I downloaded from NTIS had somewhat 
more detail and was the last paper of a collection of JPL/NASA papers 
bundled into a single pdf file.

Bruce