Hi On Jul 11, 2013, at 11:59 PM, Bob Stewart <[email protected]> wrote:
> After ham-fistedly breaking a few things, I've finally got my GPSDO working. > (does happy dance) Now that it's had some time to warm up Time as in minutes, or as in a couple of days? If you look at the plot in the QEX article, a day or so is the expected "warmup" period. > I see that it's started wandering around +/- a couple of counts from sample > to sample (16 seconds). If it's + *and* - then the gizmo is driving down the middle of the road. If it's always + or always - then it's likely not yet locked. > Is this because the UT+ is not set to timing mode? The UT needs to be in "position hold" mode with a proper (24 to 48 hour) survey on it's location for best performance. It should not be +/- 100 ns even without this. Is your VCXO a 10811? Does it have the same sensitivity as a 10811? If not, you may need (per the article) to make some firmware changes. Bob > Putting in an RS-232 (or USB) to TTL adapter, switchable between the UT+ and > the VE2ZAZ board, is pretty much next on my schedule. I've got an adapter I > made many years ago, but it's not suitable for mounting in the box, and > there's no simple way to hook it up to the UT+ at the moment. > > Bob > _______________________________________________ > 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.
