Whilst on second thoughts it does seem a bit odd that this oscillator has passed 10MHz and still not locking this might be linked to the alarms being generated at around 5.6 volts as per my previous comment, even though the EFC voltage at the extreme does, theoretically at least, seem to be enough to implement the control function. I would still be very inclined with this unit to remove the oscillator and test it on its own. Regards Nigel GM8PZR In a message dated 23/01/2014 23:59:34 GMT Standard Time, ail...@t-online.de writes:
Hi! I bought a Trimble/Nortel GPSDO http://www.ebay.de/itm/300933951405?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m 1497.l2648 and Lady Heather's now tells me that everything is alright - except - DAC 6.000004V - OSC BAD - osc age alarm The rectangle "10MHz" output signal (J5) shows a signal at about 9.8MHz (a deviation of about 200kHz), wobbling 4Hz up and down. Oddly enough, the direct oscillator output (J4) shows a sine wave at a stable 10.0000004MHz (a deviation of 0.4Hz). It seems to me it's not the oscillator that is bad but the servo loop - what can I do? Thank you Volker _______________________________________________ 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.