We are looking at room temperature 5 and 10 MHz XO's for cleaning up Rb and DDS. Filter time 1 to 20 seconds and thermal mass to keep temperature influence low. Hard to find XO's, so what we are testing is older TCXO's where we remove the TC and use the tuning circuit for loop control. Any suggestions? Maybe slightly off subject but the experts are here. Thanks Bert Kehren In a message dated 11/3/2013 4:41:43 P.M. Eastern Standard Time, saidj...@aol.com writes:
The partial answer is: yes as they typically use 10MHz crystals too. But the loop BW is so wide (10Hz or more) that the crystal jumps get compensated very quickly. We have not seen any real frequency jumps in 100's of CSACs we tested that use vapor cells just like RB's do, so from my experience I have never seen a discrete frequency jump in an Atomic oscillator.. Notice that CSACs do jump significantly in frequency right after power on when they achieve atomic lock, typically about 60s after power on. Vapor cell atomic clocks typically have other issues such as excessive retrace, loss of vacuum and a subsequent slow drift in frequency, and almost instantaneous loss of atomic lock causing frequency jumps when operated above max temperature.. Sent From iPhone On Nov 3, 2013, at 13:28, Hal Murray <hmur...@megapathdsl.net> wrote: > > Do low cost recycled Rubidiums have any quirks equivalent to frequency jumps > in crystals? > > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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. _______________________________________________ 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.