Operating instructions

6888882V04 15

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