[time-nuts] [Bulk] Lucent KS-24361 / Z3810A : Strange behavior without GPS reception

[J. L. Trantham]

Klaus,

It would appear that you are still acquiring sats.

I would not reach any conclusions about function until the survey is 'complete'.  Currently, it is suspended.

I suspect it all goes back to a poor set of signals from your GPS antenna.

I don't know anything about how these units 'should operate', only how they do operate when given a good GPS signal.  It would appear that your units worked normally when using the outdoor antenna.

Good luck.

Joe

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Klaus Melchior
Sent: Sunday, February 01, 2015 5:48 AM
To: time-nuts at febo.com
Subject: [Bulk] [time-nuts] Lucent KS-24361 / Z3810A : Strange behavior without GPS reception

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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