[time-nuts] Is my Cs C-Field set OK or do I need to take more data?

Brooke Clarke brooke at pacific.net
Sun Jan 9 21:34:25 EST 2005


Hi Doug:

Yes.  I'll collect more data, but not change anything yet.

Interesting idea about turning off the disciplining.  That should give a 
straight line, I'll give it a try tomorrow.

Thanks,

Brooke Clarke, N6GCE

-- 
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com




Doug Hogarth wrote:

>Maybe I'm missing something, but I would collect more data and not worry
>about the C-field (frequency offset) at this time.
>I'd focus on the ~80ns peak-to-peak that you saw over 10k seconds vs
>GPS-disciplined Rb.
>That seems too large, so experiment with things like different loop
>constants, verify triggering, consider temporarily turning off the
>displining, etc.
>
>-----Original Message-----
>For the last few days I've been tweaking the C Field setting on a FTS
>4060/S24.  Here's some data taken using the 1 PPS output of a GPS
>disciplined Rb oscillator (PRS10) as the "A" trigger input to an SR 620 TI
>counter.  The "B" stop input is the 1 MHz output from the Cs source.
>http://www.pacificsites.com/~brooke/pdf/sn1013_C-Field.pdf
>
>
>
>_______________________________________________
>time-nuts mailing list
>time-nuts at febo.com
>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
>  
>




More information about the time-nuts mailing list