Rather than using a scope in Y-T mode (with triggered sweep) I find that using a scope in X-Y mode makes it much easier to compare frequencies. Doing this, you essentially get a synchroscope display. If the two waveforms are sinusoidal, the trace will be a circle, the rate of revolution is the frequency difference, the direction of rotation tells you which frequency is high/low.
FWIW, -John ======= > John, > [snip] > Your oscilloscope method (without proper handling of phase ambiguities) > measures a compound of both properties and is not well suited for > stability measurements. [snip _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
