10 SUB-RECEIVER

ATTENUATOR

The attenuator reduces the level of received signals. It is useful when there is strong interference from an adjacent frequency. Since the main transceiver and sub-receiver share the same antenna for the 144 MHz and 430/ 440 MHz bands, activating the attenuator function for the sub-receiver also causes the function to switch ON for the same band of the main transceiver.

PRE-AMPLIFIER

The pre-amplifier amplifies the level of received signals. It is useful when the receiving signal is weak. If there is no strong interference from adjacent frequencies, switch the pre-amplifier ON to raise the receiving signal level. Since the main transceiver and sub-receiver share the same antenna for the 144 MHz and 430/ 440 MHz bands, activating the pre-amplifier function for the sub-receiver also causes the function to switch ON for the same band of the main transceiver.

DUAL WATCH

If different frequency bands are set on the main transceiver and sub-receiver, you can still monitor the other band activities while transmitting on the TX band. It is useful that you can still monitor the local repeater frequency (VHF or UHF band) while you are working on a DX station on the HF band of the main transceiver.

If you have the same frequency band (VHF or UHF band) for the main transceiver and sub-receiver, you can monitor both frequencies independently at the same time. However, both receivers will temporarily mute when you transmit because the transceiver shares the same 144 MHz and 430/ 440 MHz band antenna between the main transceiver and sub- receiver.

TRANSMITTING

First, confirm that the “” icon is on the SUB band display. Press [SEND] or press and hold Mic [PTT], then speak into the microphone in your normal tone of voice. When you finish speaking, press [SEND] again or release Mic [PTT].

SELECTING A TRANSMIT POWER

You can also adjust the output power for FM mode on the 144 MHz and 430/ 440 MHz bands when you are operating the sub-receiver.

1Press [PWR].

• The current transmit power appears.

2Turn the MULTI/ CH control counterclockwise to reduce the power or clockwise to increase the power.

Note:

◆The selectable range varies depending on the band and mode {page 79}.

◆Output power configuration is also reflected in the main transceiver.

SCAN

All types of scanning are also available for the sub- receiver. However, the operating frequency range is limited to the sub-receiver’s frequency coverage. Refer to “SCAN” {page 66} for details on how to operate the scan function.

NOISE REDUCTION

Since the sub-receiver can receive only in FM or AM mode, DSP noise reduction 1 (Line Enhanced) is available to reduce the noise from the receiving signals. Refer to “NOISE REDUCTION” {page 56} for details on how to control and adjust the function.

MICROPHONE GAIN

Access Menu No. 41 and select “LOW”, “MID”, or “HIGH” for the microphone gain.

Note: When using the optional MC-90 microphone in FM mode, select “HIGH” microphone gain. Microphone sensitivity is low in FM mode; this may cause insufficient modulation. For other microphones, select “MID” or “LOW”.

FM REPEATER OPERATION

You can also configure an independent repeater offset frequency for the sub-receiver, if necessary. Refer to “FM REPEATER OPERATION” {page 32} for details.

REVERSE FUNCTION

Press [TF-SET]to switch the sub-receiver Reverse function ON (or OFF). “R” appears while the Reverse function is active on the sub-receiver. Refer to “REVERSE FUNCTION” {page 34} for details.

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