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6888882V04
Grounding
Failure to provide proper grounding to each system unit (RM125/RM125R, 1 kW PA and PS unit, and
to the optional PPS) and to the rack in which these units are installed will degrade system operation
and cause RF voltage to be present on the equipment chassis. A possible serious hazard to personnel
could result, as well as equipment malfunction.
Wide copper straps, as short as possible, must be used for grounding. These straps must be clamped
or bonded to a common grounding point within the rack, which is connected to a reliable, low-
resistance grounding system.
Power Requirements
The RM1200 PS unit requires AC power at a nominal voltage of 110 or 220 VAC, 50/60 Hz. The PS
unit will automatically select the appropriate voltage range.
The maximum AC power consumption during high-power transmission is up to 5 kW.
In addition to the circuit breaker or fuse protecting the supply line to the RM125/RM125R, a suitably
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 RM1200 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 System
Antenna systems are selected in accordance with the specific communication requirements of each
customer: many HF antenna types are available, each providing different radiation characteristics to
meet different communication requirements. Therefore, the selection and installation of an antenna
system is customer’s responsibility. If necessary, contact the manufacturer or your local representative
for additional information.
