> > Can anyone recommend software to calulate the Allan varaince from a set > > of data? > > > > I have taken many measurements with the SR620 using it's 500 second gate > > and downloaded the results into Excel. > > > > I can use the SR620 itself to calulate the Allan Variance. However, I > > want to know the Allan Varaince over a 10000 second sample instead of > > 500 seconds. > > > > Hoping to plug the data into software and get the result!! > > John Miles has written some nice software. > > http://www.thegleam.com/ke5fx/timelab/readme.htm > > It is intended to do the measurement direct, so the measurement log > becomes in the right format.
There's a nicer-looking beta version at http://www.ke5fx.com/timelab/setup_test.exe as well, which has some rendering improvements such as antialiasing and window/font resizing. It should work with the SR620 in either direct-measurement mode (either addressable or talk-only), or via File->Import ASCII Phase or Frequency Data. Also see Ulrich Bangert's plotter program (Google 'DF6JB plotter' for a link). It has some data-manipulation features beyond what TimeLab does. -- john, KE5FX _______________________________________________ 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.