Unclassified
User Guide
4-1
4.1 GENERAL
The following instructions present operating procedures specific to the RM500 and
RM500R. It is assumed that the operator is familiar with the common MICOM 3
operating procedures; if necessary, refer to Publication 6886867J01, “Owner’s Guide,
MICOM 3E/3T/3R HF-SSB Transceivers”, and to the applicable MICOM 3 Supplements
that cover optional features.
4.2 PREPARATIONS FOR OPERATION
a. Set the REMOTE CONTROL switch on the rear panel of the RM500/RM500R to the
OFF (down) position.
b. For the RM500R, set the internal speaker switch to ON (up).
4.3 CALIBRATION PROCEDURE
The manufacturer calibrates new RM500/RM500R sets, to ensure that the transmit level
matches the specifications at each of the four transmit power levels (LOW, MED, HIGH,
and MAX). However, after repairing an RM500/RM500R, it is necessary to calibrate
again the radio set.
Calibration instructions for the RM500/RM500R are given in “Chapter 12: Technician
Mode” of Publication 2072-09538-00, “Radio Service Software (RSS) V3.0, User’s
Guide” (previously Publication 68P02953C05-O).
The calibration procedure is described in para. 12.2: “Power Calibration” of the RSS
User’s Guide. Before carrying out the procedure, make sure to select the 1 kW amplifier
power word option on the window that is opened by selecting Technician>Calibration
(this selection also applies to the internal 500W power amplifier of RM500/RM500R).
The calibration must be performed for each transmit level. The nominal transmit levels are
as follows:
LOW: nominal transmit power of 200W.
MED: nominal transmit power of 300W.
HIGH: nominal transmit power of 400W.
MAX: nominal transmit power of 500W.
Exceeding the maximum rated power of the RM500/RM500R (500 W) may damage the
equipment, and therefore it is highly recommended to adjust the MAX transmit power to
450W (that is, 0.5 dB below the rated maximum).
This is a precaution that takes into consideration the accuracy of the equipment used to
measure the output power.
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