Hi Tom:
Somewhere in May my CSI LGBX Pro DGPS Receiver quite GPS locking (the CSI LF
beacon receiver works fine).
It uses an Ashtech G-12L GPS receiver. Do you know if they have a fatal rollover problem rather than just getting the
year wrong?
http://www.prc68.com/I/LGBXcsiDGPS.html
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Tom Van Baak wrote:
Hi Daniel,
What you have is a 58503A, the GPS time/frequency receiver (the 58530A is a GPS
bandpass filter).
Note that today is MJD 56829. Exactly 1024 weeks (7168 days) ago was November
4, 1994. So this looks like a typical GPSDO week number rollover issue. It
shouldn't affect the time or the 1PPS or the 10 MHz. One thing to try is
manually setting the date using a SCPI command.
You can check www.realhamradio.com/GPS_websites_list.htm to see if anyone else
has seen this on their 58503A or Z3801A receivers.
Did you notice it happened just today, or did it start happening maybe a few
weeks ago?
I ask because recently we passed the 3/4 mark in the current 1024-week (19.6
year) GPS cycle. Specifically, on 2014-05-04 it was 768 weeks since the last
rollover (1999-08-15) and 256 weeks before the next rollover (2019-03-31).
/tvb
----- Original Message -----
From: "Daniel Burch" <[email protected]>
To: <[email protected]>
Sent: Saturday, June 21, 2014 10:06 AM
Subject: [time-nuts] 58503A date code problem
Hi All,
I have a HP/Symm 58530A that has the correct time, but date keeps
defaulting to 1994, Nov, 4 after GPS Lock. The pre-lock is 1996, so I do
see a change when it locks, just to the wrong date.....time is exactly
correct and tracks.
Any ideas?
Thanks!
db
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