DOC 4380A
4380A O & M Manual
67
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
o
Loss of Power. Antenna requires 5-18Vdc to operate properly. Disconnect the cable from the
antenna and measure the DC voltage between the center pin (+) and shield (-) to ensure the
antenna operating voltage is present. If not, check the cable continuity and DC Power Source.
Note:
The DC Power source may be a BIAS Tee or the 4380A. Ensure the antenna voltage is
available from the proper source.
o
Failed Antenna. If the DC Power source is available and at the proper level and the antenna
cable continuity is good, replace the antenna.
User entered an invalid position
o
GPS Tracking indicator is OFF. Enter the correct position for the antenna. Use the
status
health:gps_error
command to look at the status of the GPS hardware.
6.6 Internal Clocks
If you suspect there may be an issue with the internal clocks use the
status health
and
status reference
commands to look at the status of the internal clocks.
Note:
The example below has been edited to show the relevant fields in the system health status for the
clocks.
4380A>status health
[clock_freq_step]
[active] false
[occurrences] 0
[clock_phase_step]
[active] false
[occurrences] 0
[clock_starvation]
[active] false
[occurrences] 0
[clock_steer]
[active] false
[occurrences] 0
[clock_wander]
[active] false
[occurrences] 0
4380A>status reference
[frequency]
[external]
[communications] N/A
[locked] true
[signal] present
[internal]
[locked] true
[timescale]
[clocks]
[Cesium1]
[1_pps_present_slot_4_port_1] true
[communications] N/A
[id] 1365
[Cesium2]
[1_pps_present_slot_4_port_2] true
[communications] N/A
[id] 1559
[hp5071]
[can_communicate] false
[lns]
[locked] true
[ntp]
[locked] true
[source] internal refclock
[ocxo_freq_control] 2
[OK] 2015-08-08T14:46:32Z
Users can also check the status of the time scale to ensure the UTC offset value [ptd] is under +/- 100 ns
from UTC and the clock is being steered
Summary of Contents for SyncSystem 4380A
Page 2: ......
