DOC 4380A
4380A O & M Manual
10
098-00723-000
– Jul 2017 Revision 4.0
SyncSystem 4380A O&M Manual
[ERROR] 2015-08-05T14:30:53Z
D.
You can verify the setting is correct by typing
settings gps:antenna_voltage
and pressing enter,
this will display the current antenna voltage setting.
0 VDC 0.000000000000
5 VDC 5.000000000000
12VDC 1.200000000001
The antenna voltage setting can also be verified using a voltmeter. To verify the antenna voltage,
apply the probes to the ANTENNA connector on the rear panel. The center conductor should be
at a higher potential than the 4380A chassis. This voltage reading indicates the voltage being
provided to the antenna. If no voltage is present, then the antenna is not being powered by the
4380A.
E.
If this setting is correct, type
save
to save the current user default configuration on the system to
ensure the system provides the proper antenna voltage after a reboot or power cycle.
2.4.3 Outdoor Antenna Grounding
If an outside antenna is connected to the 4380A, be sure the antenna is grounded so as to provide some
protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code,
ANSI/NFPA 70 provides information with regard to proper grounding of the mast and supporting structure,
grounding of the lead-in wire to an antenna discharge unit, size of grounding connectors, location of
antenna discharge unit, connection to grounding electrodes, and requirements for the grounding electrode.
2.4.4 Antenna Mask Angle
Adjustment of the antenna mask angle may be necessary for installations with severe multipath problems.
The mask angle of the antenna refers to the elevation angle above the horizon at which all satellites above it
are tracked. It may be possible to track satellites below the mask angle, but the data is intentionally omitted
because it is unreliable. Installations with severe multi-path problems may find that they get better timing
performance out of the 4380A when using a higher mask angle. To set the mask angle, access the system
via the command port and use the
mask_angle
command to set the desired mask angle for the receiver.
Mask angle value is in degrees.
4380A>mask_angle 10
[OK] 2015-08-05T15:05:12Z
You can verify the current value of the mask angle by sending the
settings gps:mask_angle
command.
4380A>settings gps:mask_angle
1.00000000001
[OK] 2015-08-05T15:04:43Z
If this setting is correct, type
save
to save the current user default configuration on the system to ensure the
system uses the proper mask angle after a reboot or power cycle.
2.4.5 Positioning Modes
The 4380A offers three different modes for determining the antenna position and determining receiver
operation: dynamic, auto, and manual.
2.4.5.1
Dynamic Position Mode
The Dynamic mode is typically used for systems located on mobile platforms.
NOTICE
The system default mode is dynamic. Users at static locations should change this to auto or manual based
on the information provided below.
Summary of Contents for SyncSystem 4380A
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