[time-nuts] 5370B arrived - any FAQ

Pete peterawson at earthlink.net
Thu Jun 19 14:17:10 UTC 2008


As to the frequency measurement based on 1 period
timing; I think you'll find that what's actually measured
is the period, whose reciprocal is displayed as frequency.

This means that the channel A trigger point set the start
& the channel B trigger point set the stop of the period
measurement. A very small mismatch of those 2 points
will result in an apparently large error in the computed
frequency. 

As was pointed out earlier, this technique also
doubles the trigger uncertainty of the measurement
vs. the more traditional single channel method. 

Pete Rawson




More information about the Time-nuts_lists.febo.com mailing list