20
6888882V04
Operating Instructions
You are now ready to start using the radio set. For the additional operating procedures, you may use
the information appearing in the “RM125/RM125R Owner’s Guide”, Publication 6888882V02, and
in the “Owner’s Guide, MICOM-3F/3T/3R HF-SSB Transceivers”, Publication 6886867J01.
1. During reception, you will see the receive indications (
RX
and the operating frequency) on the
1 kW amplifier LCD.
Note
The tune indications described in Table 7 will appear whenever you change the
operating frequency, and also whenever the
ENT
key of the RM125/RM125R is
pressed. If the frequency cannot be identified, you will see an
INVALID FREQ
message, and it is not possible to transmit using the 1 kW amplifier (the 1 kW
amplifier is bypassed).
2. When you press the PTT to start a transmission, the TX indicator of the 1 kW amplifier lights,
and you will see the transmit indications (
TX
and the operating frequency) on its LCD.
The second row of the LCD displays the transmit power, and the VSWR.
Note
During normal transmission, the TX indicator lights, and the BYPASS and FAULT
indicators are off.
If the BYPASS and FAULT indicators light, the 1 kW amplifier switched to the
bypass mode because it either overheated to dangerous levels, or the antenna
VSWR is too high, or because it could not identify the operating frequency. You
can read the information displayed by the LCD to get additional details (see
Table 3). In this case:
1. If the operating frequency has not been identified, repeat the frequency
measurement process by pressing the
ENT
key of the RM125/RM125R
and monitor the RM125/RM125R display: it should switch to the
transmit mode for a few seconds, and its transmit display should
include at least two bars.
2. Check that the amplifier cooling fans operate normally, and that
nothing blocks the air intake and exhaust vents.
3. Check the antenna system and the feed cable for accidental
disconnection or damage.
4. If problem persists after turning the equipment off and then on again in
the proper sequence, service is needed.
If the FAULT indicator flashes but the BYPASS indicator is off, the 1 kW amplifier
halved its transmit power because it overheated. In this case, take the steps
described in Item 2 above.
Equipment Turn-Off
1. Turn the RM125/RM125R off: turn the front panel ON/OFF switch and volume control fully
counterclockwise, beyond the detent position. Now set its AC power switch to OFF.
Note
At this stage, the 1 kW amplifier is also turned off.
2. Turn the PS unit off by setting its ON/OFF switch to OFF.
