Juniper ACX500 Hardware Manual page 110

ACX500 Universal Access Router Hardware Guide
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You must mount the antenna above and away from any electrical systems such as lift
mechanisms, air handlers, HVACs, and other electrical or mechanical machinery.
The GNSS signals can be reflected by objects such as metal, walls, and shielded glass
parts. Do not install the antenna near good light-reflecting surfaces. Failing to do so
might result in distorted GNSS signals.
To avoid multipath reflections, do not place the antenna near a wall, window, or other
large vertical objects.
To prevent damage from lightning, do not place the GNSS antenna at the highest point
of the building.
You must locate the GNSS antenna at least 3 feet (1 m) away from any metallic objects
such as radio tower, other antenna mast, electrical poles, and so on. See
Figure 33 on page 91.
Allow at least 6 feet (2 m) of separation between GNSS antennas. See
Figure 33 on page 91.
The antenna must have an unobstructed 360° view of the sky from 15° above the
horizon. See Figure 34 on page
Locate the antenna within a reasonable distance of the building cable entry point.
Mount the antenna to any fixed surface by using the GNSS antenna mast or stanchion
clamp. You may install the antenna to a vertical or horizontal surface based on the
surface availability as long as the other antenna placement requirements are met.
You must connect the GNSS antenna to a surge or lightning arrestor. The surge arrester
must be near the antenna location or at the building entrance, and must be grounded
to the building ground. This ensures that the antenna has a direct path to ground and
is away from any sensitive electrical or electronic GNSS equipment.
You must protect the GNSS antenna cabling from environmental conditions such as
foot traffic, standing water, and any mechanical stress that might compromise or affect
the cable integrity. We recommend, where applicable, to run smaller-size cabling
through a dedicated outdoor-rated electrical conduit.
91.
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