Peter Loron wrote: >> I just bought an oscillator on ebay. Here's the basic description from >> the listing, >> "This is an auction for one CTS Knights 970-2162-0 (WP 93216-L1) 5MHz >> OCXO oscillator." >> >> It is a double oven and actually has a frequency of 5.000055 MHz on >> the >> label, so 55 Hz above >> 5 MHz. I'm hoping it is a very clean source and will be good for >> beating >> against other 5 MHz >> sources to measure them, but I haven't found any more info on this one >> with searches. >> >> Does anyone on the list have any guess what it might have been used >> with? I'm guessing it may be >> for some piece of measurement test equipment. Or does anyone have a >> lead >> on specs for the >> quality of its output signal? >> >> The auction was 130297655960, if anyone wants to look at the pictures. >> >> thanks, >> Rex >> > > Hello, group. The item Rex is referring to is one I sold to him. When > I acquired the lot of OCXOs, I sent a mail to CTS, asking them for any > information on them. They were able to supply me with the mechanical > drawings, but the specs are proprietary as they were custom built for > Lucent...likely embedded in some sort of comms equipment. I'm guessing > that if they went to the expense of buying double-oven oscillators, > they chose good specs for them. > > I'm thinking of desoldering the adjustment screws on one of them to > see if I can tune it to 5.000000 MHz, although that is probably in > noise floor of my equipment. > > For somebody (like me) who does not have a background in metrology and > lacks any serious measuring equipment, is there a way to characterize > items like this short of sending them to a lab? > > Thanks. > > -Pete > > >
A list member sent me a brief CTS datasheet. Looks like the oscillator is probably a version of JKSC-142. The info is brief and does not mention noise but the main feature is long term and temperature stability. STABILITY: +/-1x10^-7 for 20 yrs without any adjustment. I can't guess why Lucent would want them 55 Hz above 5 MHz unless it was some kind of measurement application, but I don't know much about telephone stuff. -Rex _______________________________________________ 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.
