[time-nuts] Simple questions on GPSDO

Joseph Gray jgray at zianet.com
Sun Sep 27 07:20:14 UTC 2009

Four nights ago, I hooked up one of my Z3801A's for the first time in
over three years. When I last had things up and running, I was just
getting into trying to understand how these devices work. Since then,
I have forgotten much of what little I learned back then. Knowing the
level of expertise here on the list, I would ask your indulgence while
I ask some simple questions.

Here is a plot from GPSCon Pro of the Z3801A that I got running almost
four days ago: http://www.zianet.com/jgray/temp/Z3801A.png. Forget
about the huge excursions at the beginning. I powered the unit on some
hours before I hooked it up to a PC and told it to do a position
survey (I moved across town from my previous location). Upon powerup I
did initially see the GPS Lock LED, but then it went to Holdover mode
until the survey was in progress.

More information about the time-nuts mailing list