User manual

Table Of Contents
Section 3: Installation 3-17
Moseley SL9003Q 602-12016 Revision G
(Typical)
Figure 3-6 Rack Ear Bracket Mounting Methods
3.4 Antenna/Feed System
3.4.1. Antenna Mounting
The antennas used as part of the SL9003Q system are directional. The energy radiated
is focused into a narrow beam by the transmitting antenna and must be aligned towards
the receiving antenna. The type of antenna used in a particular installation will depend
on frequency band and antenna gain requirements. These parameters are determined
by the path analysis.
The antenna is usually mounted on a pipe mount or tower, on top of a building, on a
tower adjacent to building where the SL9003Q is installed, or on some structure that will
provide the proper elevation. If the tower or antenna mounting mast is to be mounted on
a building, an engineer should be consulted to ensure structural integrity. The antenna
support structure must be able to withstand high winds, ice, and rain without deflecting
more than one tenth of a degree. The optimum elevation is determined by the path
analysis.
Mount the antenna onto its mounting structure but do not completely tighten the
mounting bolts at this time. The antenna will need to be rotated during the path aligning
process.
Information on how to perform a site survey and path analysis can be found in the
Appendix, Path Evaluation Information.
3.4.2. Transmission Line
Run the transmission line in such a manner as to protect it from damage. Note that
heliax transmission line requires special handling to keep it in good condition. It should
be unreeled and laid out before running it between locations. It cannot be pulled off the
reel the same way as electrical wire. Protect the line where it must run around sharp