ACCESSORY CONNECTION CABLE

Connects the GX5500S to a GPS, a PA speaker, and an external speaker. See section “3 OPTIONS” for a list of optional STANDARD HORIZON Speakers.

DC INPUT CABLE

Connects the radio to a DC power supply capable of delivering 12 to 16V DC.

FRONT PANEL REMOTE MIC Connector

Connects the supplied Hand Microphone if desired. This connnector is used to remote the Front panel speaker mic using the optional MEK-4Microphone Extension

Kit. 2 front panel micro-

phones to the front mic jack and the rear panel

mic connector at the same time.

RAM+ MIC CONNECTORS

Connects the GX5500S to the enhanced RAM+ MIC (Remote Access Mi- crophone) or the VH-310Handset. Refer to section “13 ENHANCED RAM+ MIC OPERATION” or “14 VH-310 HANDSET OPERATION” for details.

ANTENNA JACK

Connects an antenna to the transceiver. Use a marine VHF antenna with an impedance of 50 ohms.

PTT (Push-To-Talk)SWITCH

Keys the transmitter when the transceiver is in radio mode. If the transceiver is in the intercom operation mode (between the RAM+ and the GX5500S), it activates the GX5500S microphone for voice communications.

MICROPHONE

Transmits the voice message with reduction of background noise, using Clear Voice Noise Reduction Technology.

MICROPHONE SPEAKER

The same audio heard through internal radio speaker is heard through microphone speaker.

[UP(S)] / [DOWN(T)] KEYS

The [UP(S)] and [DOWN(T)] on the microphone function the same as the CHANNEL selector knob on the front panel of the transceiver.

[16/9] Key

Pressing the [16/9] key immediately recalls channel 16 from any location. Press and hold the [16/9] key to recall channel 9. Pressing the [16/9] key again will revert the radio to the previous selected channel.

GX5500S

 

Page 23