> Actually, in this application will a bit of interlocking not > hurt, as the two oscillators should longterm have the same > frequency and interlocking will pull them together to their > average frequency. If you further aid this interlocking by > externally couple them together for higher frequencies (up to > say 10-100 Hz) then you can sum their outputs and get a > reduced noise response, a 3 dB improvement. The noise > processes internal to the oscillators will be uncorrelated > where as the locking causes the signals to be in phase.
This is very true. I saw that HP did this in their cal lab with a half-dozen(?) hand-picked 10811 in order to get a combined virtual OCXO with better phase noise than any one physical OCXO. Rick, maybe you remember some details of this cool 10811 ensemble? /tvb _______________________________________________ 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.
