Here are the final results of the calibration. I ran the configuration described previously for 24 hours. As indicated in my last message, after 10 hours the display showed 10,000,000.01. Over the next 14 hours it varied between 9,999,999.99 and 10,000,000.01. I measured the drift between the GPSDO and MV89A signals at different times during the last 14 hours with the following results: 1) 3 am - the MV89A lost 1/2 cycle every 1 minutes, 8 seconds (this represents a frequency difference of .007 Hz); 2) at 7 am it lost 1/2 cycle every 2 minutes (This represents a frequency difference of .004 Hz); at 4 pm it lost 1/2 cycle every 1 minute 27 seconds (this represents a frequency difference of .006 Hz). I should mention that at the stated times, I would make the frequency drift measurement, then nudge the frequency adjust voltage to change the drift to the slowest I could make it.
Once again, thanks to all who commented. I very much appreciate the help given.
Regards,
Dan
