Antenna connection
It is essential to select a good quality, high efficiency, 477 MHz antenna. A poor quality
antenna or one not designed for the specific frequency band you are using will give
very poor performance.
INSTALLATION
Squelch:
Press the
SQL
key to open or close the squelch.
Duplex
Mode:
To enable or disable Duplex on a repeater channel, select the required
repeater channel (1 - 8, 41 - 48) then press the
DUP
key. The
icon will appear whenever Duplex is enabled on the current channel.
Priority
Channel:
To store a Priority channel, select the required channel then hold the
PRI
key. To recall a Priority channel press the
PRI
key. The ‘PRI’ icon
is displayed whenever the Priority channel is selected.
Transmitting
IMPORTANT:
Always listen to ensure the channel is free before transmitting.
To transmit, press the
PTT
on the microphone. The
icon will appear. Hold the
microphone about 3-5 cm from your face and speak at a normal voice level. Release the
PTT
when you have finished talking, the
icon will disappear.
Menu
The Menu provides access to all the settings, adjustments and functions in the radio.
All menu items are controlled using the
MENU
,
,
and
BACK
keys.
To access the menu, press the
MENU
key. Scroll through the list of menu items using the
or
keys. To select an item, press the
MENU
key. To step back through the menu,
or to exit the current screen, hold the
BACK
key.
4
3
2
Mounting option 2
Screw mounting
cradle to a firm surface.
Telemetry Channels
ACMA regulations have allocated channels 22 and 23 for telemetry only applications
and have prohibited the transmission of speech on these channels. Consequently your
radio has a transmit-inhibit applied to channels 22 and 23. Currently transmissions on
channels 61, 62 and 63 are also inhibited and these channels are reserved for future use.
GENERAL OPERATION
Controls
Summary of basic controls
For a detailed description please refer to the full instruction manual available from the
GME website.
Receiving
Power:
Press and hold the
key to turn the radio on or off.
Volume:
Press the
or keys to adjust the volume.
Selecting
Channels:
Press the
or
keys to select a channel.
Inserting the radio
Slide radio fully into cradle until it clicks
into place.
MAIN WIRING AND CONNECTION
Connection of the microphone
Microphone must be correctly installed to ensure
the radio has full IP67 ingress protection.
Plug the microphone’s RJ45 plug into the socket on
the front of the main unit.
Slide rubber grommet into the radio housing until
fully seated.
Turn the screw cap clockwise and
hand tighten to seal the unit against
water and dust ingress.
Microphone
Push to talk
Programmable
(XRS) function
key
Power
Priority
Channel/Up
Menu/Enter
Channel/Down
Back
Programmable
(Top) Function
Key
OLED display
Scan
Duplex
Squelch
Speaker
Volume -
12V DC
Connector Plug
Red+
Fuse
-Black
Coax Cable
MC668B-IP
Microphone
UHF antenna
Optional extension speaker
Mounting option 1
