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User's Manual

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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 1KW amplifier LCD.
Note
The tune indications 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 1KW amplifier (the 1KW amplifier
is bypassed).
2. When you press the PTT to start a transmission, the TX indicator of the RM-125 and on
the 1KW amplifier lights, and you will see the transmit indications (TX and the operating
frequency) on the LCD.
The second row of the 1KW 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 1KW 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.
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 amplifier LCD 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 1KW
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