Hi The Andrew boxes most of the TBolts came out of were designed for E-911 location service. The idea was to use time difference of arrival at multiple sites to triangulate a cell phone. For what ever reason, they decided a "fast tracking" of GPS time was going to give them the best results. I think that was the wrong decision, but that's what they went with.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Green Sent: Wednesday, June 16, 2010 9:32 AM To: [email protected] Subject: Re: [time-nuts] Thunderbolt test results The default parameters are a compromise. The thunderbolt was originally used to provide time and frequency, though I understand not always frequency, for cellsites. Though heated and air conditioned, I suspect they had pretty good temperature swings. Also, the sky view was not always optimum. It was supposed to lock on to as few as 1 SV, come up from dead cold and work. Obviously, those settings can be improved upon when we stabilize the temperature, voltages, use good antennas. I use one as a reference for an amateur repeater and it works well for that. When I was trying to put the repeater on the air, I changed the settings from default to what I had found in the lab that worked better and the Tbolt went into holdover and wouldn't come out. I changed back to the default settings and it worked fine. I am not sure why they didn't work but I didn't have a lot of time to investigate. Months later, it is still working great. There are people here that have spent many hours optimizing the Tbolt. Search back and you will find lots about how to get the most out of it. _______________________________________________ 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.
