[time-nuts] Measuring 1 PPS with an HP 5335A
Hal Murray
hmurray at megapathdsl.net
Mon Feb 17 07:51:43 UTC 2014
> The above trigger changes combined with reconfiguring for 50ohms input
> signal did the trick. I'm now seeing readings like 0.999 999 983 +0.
That's a good way to measure/calibrate the crystal in your 5335A. :)
(Assuming you have a good reference, and GPS is good if you get consistent
readings.)
> I confess, heretofore when I saw "sawtooth" conversations, and tried to
> follow the thread, my eyes would glaze over after one or two emails. I
> presumed they were strictly discussing some RC constant circuit-design/
> tradeoffs type "sawtooth".
Have you read the Hanging Bridges paper? I'd call it required reading for
any time-nut interested in GPS.
Tom Clark and Rick Hambly: Timing for VLBI
http://gpstime.com/files/tow-time2009.pdf
tvb also has a good page:
http://www.leapsecond.com/pages/m12/sawtooth.htm
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