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.
