DOC 4380A
4380A O & M Manual
66
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
Ensure you are using the correct positioning datum.
o
Default is WGS84.
o
System is capable of using the NAD-83 datum.
o
Ensure any manually entered position is using the correct datum using the
settings gps:datum
command
4380A>settings gps:datum
wgs84
6.5.2 GPS Not Tracking
The Sync will start flashing red if the 4380A is not tracking at least 4 GPS Satellites. The indicator may
also go start flashing if the manually entered position is incorrect. If the position error is large enough the
indicator will turn red and the GPS receiver is unable to track properly depending on how large the position
error is. If the system is not tracking GPS for 30 or more minutes, the Alarm indicator will turn red. Users
can look at the GPS performance and look at the number of events and the last time GPS was not tracking
properly using the
status gps
command
4380A>status gps
[mode]
[desc] not tracking
[value] 3
[model]
[hw_version] OEMV3G-4.00-X2T
[name] L12LV
[serial_number] DAB08190113
[sw_version] 3.400
[position]
[alt] 1.841079999901
[fixed] true
[lat] 3.846636558001
[lon] -7.744087748301
[mode]
[enum] 0
[satellite]
[number] 0
[signal]
[avg] 0.000000000000
[desc] Poor
[enum] 0
[freq] single
[max] 0.000000000000
[min] 0.000000000000
Note:
If the system is reporting it is
not tracking
yet it shows it is tracking 4 or more satellites the
manually entered position may be incorrect. Verify the position settings and correct any errors. If the
position is not known or the error will not clear change the
position_mode
to auto and resurvey the antenna
position. This should clear the GPS Tracking Error. Users can obtain the position information after the
auto_hours (
position_period
) has expired by processing the RINEX file.
Possible causes are:
Poor antenna location.
Mask Angle set improperly.
Antenna Cable Failure
o
Failed lightning protection device. If a lightning protection device has been installed in the
RF & DC path ensure the device has not failed and is not open (no continuity).
o
Bad Cable. The cable may have failed due to exposure to the weather, kinking, or bending.
Inspect the antenna cable and correct any issues and replace any cables that appear to be
weathered.
o
Improper Antenna Cable. The cable may be either too long or the improper type. Microsemi
recommends using low loss coaxial cables for the GPS antenna cable. Cable losses cannot
exceed 10dB when using the antenna supplied with the 4380A.
Antenna Failure
Summary of Contents for SyncSystem 4380A
Page 2: ......
