That's a good hint. Thanks! John ----
Scott Mace said the following on 03/16/2008 09:31 PM: > I have experimented with several of the RFG units and found that > the XOs will not clear the fault light if the OCXO has drifted > too far. I was able to manually trim them and they worked well > again. Perhaps a similar problem with your RFTG. > > > Scott > > John Ackermann N8UR wrote: >> I'm not sure what's going on. I ran my XO/RB pair for 30 days, using >> the "official" interconnect cable with the monitoring software >> indicating no problems. I took phase data from the RB output via the >> TSC and fed it into Stable32 (by the way, with a 20 second timeout, the >> 30 day TSC data capture worked fine). >> >> The results show a reasonably constant +1.5 microsecond slope over 30 >> days, about 6x10e-13 offset. There's no characteristic cliff in the >> ADEV where the GPS kicks in, but yet the offset is better than I would >> expect from the LPRO running in standalone mode. Plots are at >> http://www.febo.com/pages/oscillators/rftg/ >> >> I then pulled power on the RB unit and instead of going into proper XO >> operation, I got "NO GPS" and "FAULT" on the XO. In separate >> experiments, pulling the interface cable or the 10 MHz cable result in >> the same faults -- the XO doesn't seem to take over as it should. >> >> And, when I measure the XO output, it is just horrible -- ADEV in the 9s >> from 0.1 second out past 10,000 seconds. >> >> I wonder -- has ANYONE gotten the -XO module to work in GPS-disciplined >> mode??? >> >> John >> ---- >> Tom Van Baak said the following on 03/15/2008 03:25 PM: >>>> I suspect the XO module in my RFTG setup is defective, so I'd like to >>>> find another one. It needs to be the "L106A" (not "B") version to mate >>>> with my -RB (L105A) unit. >>>> >>>> Anyone have one they'd like to sell? Or, failing that, one I could >>>> borrow to test in my system? >>> John, >>> >>> Interesting, my RFTG pair won't lock right either; I'm thinking >>> my XO module has a problem too. Do you think we're making >>> the same mistake or are both of our XO modules faulty? >>> >>> /tvb >>> >>> >>> _______________________________________________ >>> 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. >>> >>> >> >> _______________________________________________ >> 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. >> >> > > _______________________________________________ > 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. > > _______________________________________________ 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.
