Dick, A newer dual trace 'scope & some patience can tell you a bunch.
A 500Mhz 'scope set to 2nS/div with the 10MHz OXCO outputs on chA & chB, triggerred on A (or B) has a sensitivity of 2E-9/s for the traces drifting apart 1div. If you can get both zero crossings on screen (variable delay line helps) & they appear to be stationary & stay within 1div for 200s, you can be pretty sure they're locked. This should equate to 1E-11/div & the oscillators probably have more (uncorrected) drift than that over 200s. Pete Rawson _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
