6
I N S T R U C T I O N M A N UA L
G X 7 5 0
ADJUSTING THE SQUELCH
To open the squelch, briefly press the
SQL
key. A low beep will be heard and the squelch will
open. Briefly press the
SQL
key again to close the squelch. A high beep will be heard and the
squelch will be restored to its preset level.
Setting the squelch preset level
The preset squelch level can be adjusted to suit local conditions. If you are in an electrically noisy
location or unwanted weak signals keep opening the squelch, you can adjust the squelch setting
so that the GX750 remains quiet. Note that increasing the preset squelch level will mean that
stronger signals will be required to overcome the squelch and may result in missed calls from
weaker signals. The best setting is the minimum one required to keep the receiver quiet.
To alter the preset squelch setting, press and hold the
SQL
key until a high beep is heard.
The present squelch setting will be displayed in digits from -0 (minimum) to -9 (maximum)
squelch. While in this mode, briefly rotate the channel control left or right to increase or
decrease the squelch level respectively as required. Press the
SQL
key again to exit the squelch
setting mode (or wait 5 seconds and it will time out automatically). A low beep will be heard.
Minimum Squelch (-0)
Maximum Squelch (-9)
CHANNEL SELECTION
Standard Marine Channels
Select the required channel by rotating the channel control left or right. The selected channel
number is displayed.
Channel sets
The GX750 is programmed with three channel sets – International, USA and Canada. These
channel sets support various channel and frequency allocations for other parts of the world.
When operating in Australia or New Zealand, the International channel set should be selected.
Once you have selected the required channel set for your location, you should not need to
change it again unless you have moved to another country.
To select the required channel set
Switch the GX750 OFF
•
Press and hold the
16
key while switching the GX750 ON again.
•
Channel 16 will be selected and the presently selected channel set will flash on the display
as INTL, USA or CAN.
•
Briefly press the
16
key to cycle through the channel set selections in the following order:
International
Canada
USA
The selected channel set becomes active immediately.
