Microsemi SyncSystem 4380A, Руководство по эксплуатации и обслуживанию

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DOC 4380A
4380A O & M Manual
65
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
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The Outputs indicator will be flashing green when the NTP server is locked and capable of providing time
within specifications to other systems on the network and the outputs are not enabled.. When the NTP
Server is operating outside of its specification the indicator will flashing red. To look at the current status
of the internal NTP Server use the
status reference:ntp command. If the NTP Server is operating properly
the user will see the following:
4380A>status reference:ntp
[locked] true
[source] internal refclock
[OK] 2015-08-08T15:01:03Z
6.5 GPS Performance
There are several factors that could impact the performance of the GPS receiver.
6.5.1 Poor GPS Receiver Performance
There are several issues that can cause poor performance with the GPS receiver. This may be reflected in
the signal quality parameter or the fact the 4380A Sync indicator flashes red periodically. Use the
status
gps command to look at the current system status.
4380A>status gps
[mode]
[desc] tracking
[value] 4
[model]
[hw_version] OEMV3G-4.00-X2T
[name] L12LV
[serial_number] DAB08400198
[sw_version] 3.400
[position]
[alt] 5.05031000001
[fixed] true
[lat] 3.84662816101
[lon] -7.74408654901
[satellite]
[number] 8
[signal]
[avg] 4.72303771901
[desc] Good
[enum] 2
[freq] dual
[max] 4.94249992301
[min] 4.03180007901

Poor antenna location.
o
Make sure that there are no obstructions between the GPS antenna and the sky. If you are
inside a building, surrounded by tall buildings, or in a tunnel the GPS antenna will not have a
clear view of the sky.
o
The GPS receiver requires signals from at least four satellites, even partial obstructions can
prevent your GPS receiver from functioning properly.

Ensure the mask angle is not set too low or too high.
o
If set too low the receiver might not be able to track the satellites because of obstructions
o
If set too high, the receiver will not be able to use all of the available satellites to determine a
fix and determine the correct time.
o
Ensure the mask angle is correct using the settings gps:mask_angle command. Default = 10
degrees.
4380A>settings gps:mask_angle
1.000000000001