[time-nuts] Why is holdover LED on HP 58503A not lit, when GPS lock is unlit too?
Dr. David Kirkby (Kirkby Microwave Ltd)
drkirkby at kirkbymicrowave.co.uk
Sun Dec 18 17:41:38 EST 2016
It is looking much better now. I
1) Powered off
2) Left off for 30 s
3) Pulled antenna out.
4) Powered on
5) Connected antenna, making sure if was firmly screwed in.
It then got GPS lock in a few minutes. It is running at reduced accuracy,
with the survey only 9.7% complete, but it is looking more hopeful.
I can't help feeling there should have been more informative status
available by the LEDs. The fact it is locked, but at reduced accuracy,
should really be visable from the front panel IMHO. Anyway, it seems to be
getting there - see below.
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status
-------------------------------
SYNCHRONIZATION ............................ [ Outputs Valid/Reduced
Accuracy ]
SmartClock Mode ___________________________ Reference Outputs
_______________
>> Locked to GPS: stabilizing frequency TFOM 3
FFOM 1
Recovery 1PPS TI -15.9 ns relative to
GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
____________
Predict 432.0 us/initial 24
hrs
ACQUISITION ................................................ [ GPS 1PPS
Valid ]
Tracking: 6 ____ Not Tracking: 3 ________ Time _____ +1 leap second
pending
PRN El Az SS PRN El Az UTC 22:39:23 18 Dec
2016
2 28 87 86 6 20 48 GPS 1PPS Synchronized to UTC
12 57 70 119 24 24 137 ANT DLY 0 ns
14 39 287 106 31 27 303 Position
________________________
25 76 284 96 MODE Survey: 9.7%
complete
29 37 194 79
32 39 249 109 AVG LAT N 51:39:04.205
AVG LON E 0:46:36.347
ELEV MASK 10 deg AVG HGT +42.42 m
(MSL)
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
scpi >
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