A frequency offset is allowed but must stay the same for the entire measurement.
On Mon, Mar 26, 2012 at 11:07 PM, Mark Spencer <[email protected]>wrote: > Greetings, I was reviewing some older adev plots of mine and noticed that > there may be a correlation between lower adev numbers and lower frequency > off set between the reference source and the device under test. It's my > understanding that the adev calculations remove constant frequency off sets > but I'm wondering in practice this degrades the the measurements. > > It occurs to me that if I am comparing two 10 MHz signals with a TIC that > the available dynamic range of each measurements will be 100 ns. Would a > constant frequency off set effectively reduce the precision of the > measurements by eating up some of this dynamic range ? > > To put this in perspective frequency offsets of say one or two parts per > trillion seem to result in better adev readings than off sets of say ten or > more parts per trillion. > > Sorry if I have missed something obvious here. > > Thanks in advance > Mark Spencer > > Sent from my iPod > _______________________________________________ > 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. > _______________________________________________ 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.
