jshank said the following on 11/08/2006 05:12 PM: > What would be a good method of using my Z3801A 10MHz out put to adjust the > oscillator adjustment dial on my 8130 Spectracom Frequency Standard > Oscillator. When I use the 8160A Spectracom NSB frequency Standard Receiver > WWVB it has a frequency calibration feature which allows a local oscillator > to be compared to the wwvb signal showing phase drift or slight frequency > error in microseconds as well as a frequency counter showing frequency > difference in 0.01 Hz and a recorder output allowing for monitoring to occur > of several days. > > > > My question is what instrumentation or methods can I use to set my local > oscillator to the Z3801A gps signal. I know there is instrumentation such as > Tracor 527E Frequency Difference Meter which may provide some of the features > as the Spectracom 8160A, but is this what I am look for.
Hi Jeff -- A lot depends on how much accuracy you want. One simple method is to use the Z3801A as the frequency reference driving a frequency counter, and then just measure the frequency of the Spectracom. Depending on the counter, you can get from 1Hz to better than 0.001Hz accuracy. Another way is to use an oscilloscope to watch the drift of the Z3801A versus the Spectracom. You can set the scope up to show a Lissajous display, or just use one signal to trigger the scope while viewing the other. Either way will let you calculate the frequency offset by measuring how quickly the Spectracom signal drifts some amount (e.g., 1 cycle) away from the reference. Hope this helps! John _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
