[time-nuts] Lucent KS-24361 / Z3810A : Strange behavior without GPS reception
Klaus Melchior
kmel at gmx.de
Sun Feb 1 06:47:44 EST 2015
Hi,
received my Lucent KS-24361 combo, linked both units, powered them up. They
tracked 8 satellites with an outdoor antenna... all fine.
Repowered both units, but now using an indoor GPS antenna with bad
reception.
REF1 is in "Locked to Ext: stabilizing frequency" mode with TFOM=3, FFOM=1
and
"1PPS TI +40.0 ns relative to Ext", but it is in StandBy.
REF0 is ON and in "Power-up: GPS acquisition" mode with TFOM=9, FFOM=3.
Why isn't REF1 providing the 15Mhz/1PPS signal?
Here the status windows:
--------------------------- Primary Receiver
Status ---------------------------
SYNCHRONIZATION ........................................... [ Outputs
Invalid ]
SmartClock Mode ___________________________ Reference Outputs
_______________
Locked TFOM 9 FFOM
3
Recovery 1PPS TI --
Holdover HOLD THR 1.000 us
>> Power-up: GPS acquisition Holdover Uncertainty
____________
Predict --
ACQUISITION .............................................. [ GPS 1PPS
Invalid ]
Tracking: 0 ____ Not Tracking: 9 ________ Time
____________________________
PRN El Az PRN El Az GPS 23:22:29 (?) 31 Jan
2015
* 1 -- --- *31 Acq GPS 1PPS Invalid: not tracking
* 2 Acq ANT DLY 60 ns
* 4 -- --- Position
________________________
*12 Acq MODE Survey
21 17 179 Suspended: track <4
sats
*25 Acq LAT N 50:34:27.066
*29 84 86 LON E 6:15:59.517
*30 -- --- HGT +608.80 m
(GPS)
ELEV MASK 10 deg *attempting to track
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
-------------------------- Secondary Receiver
Status --------------------------
SYNCHRONIZATION ............................ [ Outputs Valid/Reduced
Accuracy ]
SmartClock Mode ___________________________ Reference Outputs
_______________
>> Locked to Ext: stabilizing frequency TFOM 3 FFOM
1
Recovery 1PPS TI +40.0 ns relative to
Ext
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
____________
Predict 432.0 us/initial 24
hrs
ACQUISITION ................................................ [ Ext 1PPS
Valid ]
Tracking: 0 ____ Not Tracking: 9 ________ Time _____ +1 leap second
pending
PRN El Az PRN El Az GPS 23:24:10 (?) 31 Jan
2015
* 1 -- --- *31 59 270 GPS 1PPS Invalid: not tracking
* 2 22 45 ANT DLY 60 ns
* 4 -- --- Position
________________________
*12 17 104 MODE Survey: 0%
complete
21 18 179 Suspended: track <4
sats
*25 56 102 INIT LAT N 50:34:27.066
*29 83 80 INIT LON E 6:15:59.517
*30 -- --- INIT HGT +608.80 m
(GPS)
ELEV MASK 10 deg *attempting to track
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
Thanks,
Klaus
--
kmel at gmx.de
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