Hi If you have a fast enough scope you can also use the:
Moved X ns in 10 seconds => X/10 ppb of frequency error. Bob On Jul 24, 2010, at 1:28 PM, Mark Spencer wrote: > Hello: > > Just for grins I decided to compare the frquency from my GPSDO to the time > base > in my 5328A counter. > > > I connected the 10 mhz time base from the counter to channel A of my 100 Mhz > scope, fed the 10 mhz signal from my GPSDO into Channel B and with a T > adaptor > also fed this signal into the input of the counter. I scope to trigger > from > Channel B. > > > The drift betwen the two signals on the scope seems to match the error in the > displayed frquency on the counter. (ie. if the counter shows 9999.9998 it > takes > approx 5 seconds for the the wave form on channel A to slip a full cycle > realitve to channel B.) > > > Is this a reasonable approach or is there a better way to compare two > frequencies using a scope ? > > Best regards > Mark Spencer > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
