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The antenna system must provide a matched termination at the operating frequency, and must be
capable of handling the maximum power output of the RM1200.
Antenna Feed System
The antenna feed system comprises any cables, panels and matrices, and any accessories that carry
HF signals between the RM1200 and the antenna itself.
The high output power of the RM1200 requires particular attention to the power rating of the
antenna system, and to the use of a high-quality, low-loss feed cable. Appropriate safety measures
must be taken to prevent people from touching the antenna, or even getting close to it.
All the antenna feed system components, and in particular the feed cable, must have low loss and be
capable of carrying the maximum power output of the RM1200. Remember that any power loss
along the cable is signal loss!
To protect yourself and the radio equipment against lightning strokes and accidental contact of
antenna and/or feed cable with high voltage lines, a properly grounded coaxial protector must be
installed at the point of entry of the feed cable into the building or communication shelter. The
recommended protector type is IS-B50LN-C0 by PolyPhaser Corp. (also available from the
manufacturer as Cat. No. 2072-09128-00).
Preparations for Installation
Before starting the installation of an RM1200, review the installation plan and make the following
checks:
1. Identify the rack or cabinet in which the equipment will be installed, and check that the rack is
securely fastened to the floor.
2. Check the mounting surfaces, and the rack mounting holes. Thoroughly clean the mounting
surface and remove all paint, grease and dirt from the holes to provide a better grounding
connection.
3. Check availability of AC power, and grounding arrangements.
4. Check antenna installation, in accordance with the antenna installation and operation manual.
5. Check the cable runs between the RM1200 and the prescribed antenna, including the coaxial
protector. Make sure that the cables are securely fastened, and do not show signs of external
damage.
6. Make sure that you have the cable sets needed for the installation, which includes the
RM1200 cable set, and cables for connecting to the exciter unit (for example, use the cables in
option G156 for connecting to the RM125/RM125R).
Caution
Before installing equipment units on slides, make sure you are familiar
with the procedures needed to install slides in the rack/cabinet, and to
safely install heavy equipment on the slides.
