I can't help but notice that you have several of these entries:
Log 067:20150101.00:00:11: 5V is out of tolerance, value: 5.52 Log 068:20150101.00:00:11: 15V is out of tolerance, value: 19.46 I think you better look into them before anything else. -Chuck Harris Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
Yesterday (31st March 2015) the "GPS lock" light of my 58503A went out and the "Holdover" light came on. The Alarm LED was *not* on. It had been like this for an hour or more. I removed the N connector, could see there was 5V DC on the antenna, and a visual inspection of the antenna cable did not give me any cause for concerns. I decided to power cycle it. Anyway, it came back up, quickly achieved lock, and I'd rather hoped it was just a glitch, and that was the end of it. NO SUCH LUCK! Today I notice the GPS lock light is on, Holdover is off, but the alarm LED is on. This is quite a different set of LEDs to yesterday. This time I connected the GPS receiver to a computer, to try to find out what was up, and are confused in that the status appears to be ok, yet the alarm is on. The log does not indicate why the alarm light should be on. (I have had it come on before, immediately after power up, when it indicated the power supplies were out of regulation, although I've never managed to observe this on a peak holding DVM, so I am not convinced the power supply was the cause.) But the unit has been stable for quite a while, yet the alarm is on, but nothing in the log indicates a problem.
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