On Aug 20, 2010, at 5:07 AM, Bob Camp wrote: > The TBolt OCXO does have good noise characteristics. Unfortunately you have > to pull it out of the unit to figure that out.
Is its phase noise substantially worse when it's in the unit? I.e., is the rest of the TBolt adding a lot of phase noise to its output via its power and/or tuning voltages? I'm powering my TBolt with an HP 6236B bench supply rather than the cheap open-frame switcher that came with it. Based on what I read, powering the TBolt with a switcher adds a lot of noise/spurs to the OCXO spectrum. My unit has the Trimble-marked OCXO, which I gather is supposed to be a lot better than the Piezo-marked one. My TBolt is presently just screwed onto the top cover of the 6236B, which is probably far from optimal. I have the whole setup installed in a closet, so at least it doesn't get nailed with a blast of cold air every time the air conditioner turns on. -- Mark J. Blair, NF6X <[email protected]> Web page: http://www.nf6x.net/ GnuPG public key available from my web page. _______________________________________________ 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.
