Hi Paul. No, the antenna is not above the tree line. Leaves are wet today, but on dry days similar. Curious: the unit puts out "5V" to the antenna. If this is 4.7 or lower, could this affect the degree of amplification the amp built into the antenna might develop? Should I find the power supply and make sure its tuned up to 5V?
The antenna I am using is: "Symmetricom 58532A GPS L1 Reference Antenna" According to the paperwork, the operating voltage should be 5V +/- 0.5V so I am within spec. But I wonder if a little more juice, to say, 5.25 might give better amplification? 73 Eugene W2HX From: paul swed [mailto:[email protected]] Sent: Sunday, May 15, 2011 8:00 PM To: Eugene Hertz; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] basic question on GPS satellites Shouldn't be doing it that fast Would indicate a poor signal level might be my guess. Is your antenna above the tree line? Wet leaves can be nasty at 1.5 Ghz Regards Paul WB8TSL On Sun, May 15, 2011 at 6:30 PM, W2HX <[email protected]> wrote: Hi there. Recently acquired my first GPSDO. It is a datum 9390 (thank you, Norm!). One aspect of its behavior seems strange to me. Within a matter of a few minutes, it seems that satellites are appearing and disappearing. Are the satellites moving that quickly? I might go from 1SV to 3SV or 4SV and then a minute later go to 1SV or none. The antenna isn't moving and the trees aren't moving too much today. I have not done anything with regard to setting minimum elevation or any other parameters. I did go through the COLD RESTART procedure to clear out everything and let it start from scratch. Do other GPSDO users experience something like this? 73 Eugene W2HX _______________________________________________ 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.
