rated circuit breaker or fuse must be used to protect the supply line of the PS unit, and enable
disconnection of its supply voltage during installation and maintenance.
Cooling
RM1200 units, as well as the RM125/RM125R, are cooled by internal fans. Air is taken in through the
front panel vents, and discharged toward the rear. Therefore, make sure that sufficient free space is
available around the equipment to enable free air flow.
Do not stack equipment units: leave at least 1U free above and below each unit installed in the rack.
Installation Data
The RM125/RM125R, the optional Pre-Selector/Post-Selector (PPS) and the RM1200 units (1 kW PA
and PS) are intended for installation in one customer-provided 19” rack. The interface cable kit for
MICOM RM1000 1 kW linear amplifier, option G156, is also intended for installation in the same
rack.
Each equipment unit has front-mounted brackets for attachment. To provide convenient access
during maintenance, each equipment unit may be installed in a sliding drawer or on slides capable of
supporting the equipment weight.
The rack itself must be securely fastened to the floor, before starting the installation activities.
Sufficient front and rear clearance is required to permit convenient access to front and rear panels, as
well as for removal and installation of equipment units, connection of cables, and maintenance.
Antenna and Antenna Feed System
See the requirements presented on page 13, including the use of a coaxial protector.
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.
Preparations for Installation
Before starting the installation of a RM125/RM125R with 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 set needed for the installation, which includes the RM1200
cable set, and the cables in option G156.
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