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SyncServer 600 Series User’s Guide
098-00720-000 Revision B – April, 2016
Appendix C Installing GNSS Antennas
GNSS Antenna Installation
Caution:
To avoid damage to the GNSS antenna,
do not
place the
antenna where high-power radio signals are beamed directly at the
unit. Such signals can damage the preamplifier of the GNSS antenna.
Warning:
To avoid serious injury to personnel or damage to
equipment, exercise caution when working near high voltage lines.
In particular:
Use extreme caution when installing the GNSS antenna near,
under, or around high voltage lines.
Follow local building electrical codes for grounding using the
frame ground lugs on the shelf.
The in-line amplifier receives DC power from the GNSS receiver,
and is supplied on the center conductor of the coaxial cable.
Microsemi does not recommend cutting the antenna cables
provided in the GNSS Antenna Kit.
Recommendation:
Microsemi recommends that you consider the
following location and environment influences before installing the
GNSS antenna:
If possible, provide the antenna with an unobstructed 360-degree
view of the sky from the horizon.
In general, do not allow obstructions that obscure the horizon (as
viewed from the antenna) by more than 10 degrees, as shown in
.
Locate the antenna well away from, and preferably in a plane
above electrical equipment such as elevators, air conditioners, or
other machinery.
To reduce the risk of lightning damage,
do not
place the antenna at
the highest point of the building.
Locate the GNSS antenna at least 3.7 m (12 ft.) from metallic
objects, if possible.
Locate the antenna high enough to avoid drifted snow.
Locate the lightning arrestor in a protected area to avoid contact
with standing water.
Locate the antenna within 9.1 m (30 ft.) of the point at which the
antenna cable enters the building.
Allow at least 3.0 m (10 ft.) of separation distance between GNSS
antennas.
Surfaces above the plane of the unit that are between the antenna
and the horizon can produce reflected (multi-path) signals, which
can degrade the performance of the GNSS receiver.
