Hi! I have been looking on the tracking of the OCXO performence while having the EFC input grounded. Yeah, it moves around all by itself. The free-running 10811 in the 4195 doesn't. It just keeps tracking away with its higher frequency noise, but really not much lower frequency noise.
The OCXO moves up stays, moves down, stays. Those large scale moves have pretty linear stretches. There is also a higher noise. Interestingly I noticed that when I pulled the EFC line, or removed the short from it, it drops in frequency until it levels out. The time constant of this is in order of 5 seconds or so. Mumble. It seems that I need to go deeply into the OCXO. I wish I could avoid that. Mumble. Cheers, Magnus _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts