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GX1280SPage 22
ACCESSORY CONNECTION CABLE
Connects the MATRIX to a GPS, and an external speaker. See section 3
OPTIONS for a list of speakers STANDARD HORIZON offers.
DC INPUT CABLE
Connects the radio to a DC power supply capable of delivering 12V DC.
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 trans-
ceiver is in the intercom operation mode (between the RAM+ and the
MATRIX), it activates the MATRIX microphone for voice communica-
tions.
MICROPHONE
Transmits the voice message with reduction of background noise.
MICROPHONE SPEAKER
The same audio heard through internal radio speaker is heard through
microphone speaker.
[
UP
(
)]
/
[
DOWN
(
)]
KEYS
The
[
UP
(
)]
and
[
DOWN
(
)]
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 loca-
tion. 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.