Neptune 13458-000, Руководство по установке и обслуживанию

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R900 Gateway Installation and Maintenance Guide 101
Appendix C RF Antenna and Coax Installation
This appendix provides information about how to install the RF antenna and coax
cable.
Neptune recommends that you consult with a qualified installer on the
design and installation of the antenna system. If the installer is already
familiar with the site and the existing equipment, this can make the
installation go more smoothly.
RF Antenna Overview
There are a number of critical items you must consider when placing and installing
antennas. The following table contains actions that can influence the antenna
placement and installation.
Mounting the Antennas
Consider the following when mounting the antennas.
Action Consider....
Mount antennas as high as
possible with an
unobstructed view of the
coverage area.
l
The supporting structure, if the antenna is not mounted above it, can
cause specific areas of limited coverage.
l
Water towers can severely limit coverage where the signal must pass
directly through the tank. When mounting antennas on a water tower, it is
recommended that they be mounted on top as close to the center as
possible.
l
When mounting the antenna on a traditional three-leg or four-leg tower,
the standoff mount for the antenna must position the antenna at least 5
feet away from the tower to minimize coverage area problems.
Avoid making the antenna
the tallest point in the
surrounding area. This may be unavoidable, but it increases the risk of the antenna being
damaged by lighting.
Table 30 – Mounting Antenna Considerations