Did you do 48 hour precision first survey first to get an accurate Lat/Long/ altitude?. You will probably need to start with a cold reset to erase any previously stored data and then perform the survey.
-=Bryan=- > Date: Wed, 5 Aug 2015 19:16:23 -0700 > From: [email protected] > To: [email protected] > Subject: [time-nuts] A few questions about Tboltmon > > Hi, > > > I got my new Thunderbolt up and running this past weekend but I have a few > questions. I understand Lady Heather is a better program, and I have > downloaded it. However right now I am trying to get things right with > Tboltmon first. I had used it with my previous GPSDO, a Starloc II. I hate to > say but the Starlic just worked, so I didn't pay much attention to Tboltmon > other than to see that I was seeing satellites. Please forgive me if some of > the questions may sound simplistic, but I'm sort of new to being a time nut. > The Thunderbolt is brand new in package. I purchased a Power One open frame > supply from EBay that was also new old stock. Before connecting it to the > Thunderbolt, I went ahead and ordered new electrolytic caps from Mouser and > spent last Friday night recapping the Power One box. I measured the outputs > with a DMM to make sure I had 5 V, -12 V and 12 V. > Noticing that in my old antenna location I could now only see 1-2 satellites > (trees have grown a bit) I moved the antenna to the roof of my house, > attached to a plumbing vent pipe, with a completely open view of the sky here > on top of a mountain in Tennessee. > > > Here's what I am noticing: > To start with I simply turned on the Thunderbolt on Saturday morning without > doing a warm or cold reset. Within a few minutes, I was seeing six or seven > satellites, with the SV boxes lit up green with various numbers which I > assume are satellite ID numbers. When I woke up Sunday I was down to seeing > only two satellites. The numbers listed were different than the ones I saw > before I went to bed Saturday. But when I unplugged the AC power from the > Thunderbolt and plugged it back in, I was back to six satellites. > I had thought that the GPS satellites I am able to see from my location are > fixed 24/7. Do they move and different satellites come into view with > rotation of the earth? > I did a warm reset when I got up at 4:45 this morning and when I got home, > four satellites were still green on Tboltmon. About an hour ago I went ahead > and did a cold reset. > I now have 6 satellites where the SV is green, and one with a yellow SV with > a value of 7.0. > All critical alarms are green, and all minor alarms are green except position > questionable which is yellow. That has been yellow since Saturday. > Under the Disciplining status, Mode is (0) Normal and Activity is (0) Phase > Locking. > The Timing Outputs are all over the place and have been since Saturday. > Twenty minutes ago I got: > PPS -106588.28 ns GPS > 10 MHz 166.08 ppb > > > So far today I have gotten the following ppb readings: > -41.48 > 374.30 > 0.48 > 0.70 > > > Should the Timing output variance concern me? > > > Thanks in advance for any help or advice. > > > Chris > KD4PBJ > Monteagle, TN > > > > — > Sent from Mailbox > _______________________________________________ > 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.
