Hi there,
thank you for valuable information I get everyday from the list.
After a very long time I managed to power up a Trimble GPSDO, connected
to an aexternal antenna.
UCCM >*IDN?
TRIMBLE,57964-15,86854165,V3.0.0.11-01
Datecode: 0814 (pretty old, but still in its teen years)
Some output from "common commands":
UCCM >SYSTem:STATus?
-------------------------------------------------------------------------------
57964-15 serial number 86854165 firmware ver 3.0.0.11-01LINK
mode
-------------------------------------------------------------------------------
Reference Status __________________________ Reference Outputs
_______________
XX Ref 8KHz 0: [LOS]
XX Ref 8KHz 1: [LOS] TFOM 4 FFOM
1
XX Ref 8KHz 2: [LOS] UCCM A Status[OCXO WARMUP]
XX Ref 8KHz 3: [LOS]
>> GPS: [phase:-3.3E-05, settling]
ACQUISITION ...................................................[GPS 1PPS
Valid]
Tracking: 8 ____ Not Tracking: 3 ________ Time
____________________________
PRN El Az C/N PRN El Az GPS 11:44:34 27
Jul 2021
32 39 107 46 3 10 226
1 28 284 37 16 6 189 ANT DLY 0 ns
10 40 51 42 14 8 327 Position
________________________
8 79 239 45 MODE Hold
23 7 49 38
21 52 297 43 LAT N 43:35:11.819
27 55 153 43 LON E 13:31:1.250
22 32 230 41 HGT +225.27
m (MSL)
ELEV MASK 5 deg
-------------------------------------------------------------------------------
UCCM >POSSTATus
---------------------------------------------
07/27/2021 11:44:57
---------------------------------------------
Position: LAT(N 43:35:11.819) LON(E 13:31:1.250) H( +225.27 m
MSL)
---------------------------------------------
Geometry: PDOP(0.0) HDOP(0.0) VDOP(0.0)
num of visible sats > 10
num of sats tracked > 10
-------- Receiver Channel State --------
CH 0 > SateID(03) TrackMode(pos avail) SigValue(36)
CH 1 > SateID(32) TrackMode(pos avail) SigValue(47)
CH 2 > SateID(01) TrackMode(pos avail) SigValue(37)
CH 3 > SateID(16) TrackMode(pos avail) SigValue(34)
CH 4 > SateID(10) TrackMode(pos avail) SigValue(42)
CH 5 > SateID(08) TrackMode(pos avail) SigValue(44)
CH 6 > SateID(14) TrackMode(tracking ) SigValue(20)
CH 7 > SateID(23) TrackMode(pos avail) SigValue(37)
CH 8 > SateID(21) TrackMode(pos avail) SigValue(44)
CH 9 > SateID(27) TrackMode(pos avail) SigValue(43)
CH 10 > SateID(22) TrackMode(pos avail) SigValue(40)
CH 11 > SateID(00) TrackMode(tracking ) SigValue( 0)
---------------------------------------------
Rcvr Status(1):
---------------------------------------------
Antenna Voltage: 5000.00mV , Antenna Current: 0.00mA
UCCM >status
- UCCM Slot STATE-
1-1. #Now ACTIVE STATUS ---------------- [OCXO Warm]
1-2. #Before ACTIVE STATUS ------------- [Alarm]
2-1. #Reference Clock Operation -------- [Not Used]
2-2. #Current Reference Type ----------- [GPS]
2-3. #Current Select Reference --------- [GPS 1PPS]
2-4. #Current Reference Status --------- [Good Accuracy & Stable]
#GPS STATUS ----------------------- [Available]
#Priority Level ------------------- [LINK > GPS]
#ALARM STATUS
#H/W FAIL [ LINK ]
#OPERATION ALARM ------------------ [Antenna]
3-1. #PLL STATUS ----------------------- [DISABLE]
3-2. #Current PLL MODE ----------------- [OFFSET OBSERVATION MODE]
The issue I'm facing is following: even after a long uptime, I never com
to a "fast blinking led" and PLL status "enabled". Monitoring device
with LHv6, shows an "operation mode" alternating Locked (few seconds"
and "recvery". TFOM is quite always 3 or 4. Power supply is linear, with
output voltage 5.6V or 6V. I made many tests but had no luck.
Sys:stat showa a "phase" value moving from -1.4E-05,settling up to
-4.3E-06, settling. On an old post I read that it might be caused by the
oscillator drifting due to age.
Any guess? Do I have to throw the unit from the window? For your
reference, I have a samsung unit connected to same antenna via a
splitter. The GPSDO is performing very well.
Thank you in advance for help.
Best regards.
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