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Channel B

To store a frequency in Channel B, select the required 
channel using the   or   keys, then press and hold the 

CHAN B

 key for 1.5 seconds. The channel number will flash 

then a high beep will be heard as the channel is stored.

To Recall Channel A or B

Briefly press the 

CHAN A

 or 

CHAN B

 key to switch 

immediately to the channel stored in that memory. If the 
radio was scanning the scan will be cancelled.

DUAL WATCH KEY (DW)

The Dual Watch function is a 2 channel scan feature where 
the GX600 switches between Channel 16 and any other 
selected channel. This allows you to monitor a working 
or club channel while still being able to receive important 
broadcasts on channel 16.  

To use the Dual Watch function, select your preferred 
working channel - either by using the   or   keys - or by 
selecting one of the stored 

CHAN A

 or 

CHAN B

 memories 

- then briefly press the 

DW

 key. A high beep with be 

heard and ‘DW’ will appear on the display. The GX600 
will now monitor the selected channel AND channel 16 
by alternating equally between them. Only the working 
channel number is shown on the display when  
Dual Watching.

To cancel Dual Watching, briefly press the 

DW

 key again.

DUAL WATCH FEATURES

If a signal appears on channel 16:

The radio will switch immediately to Channel 16 and CH 
16 will be displayed. At this point the selected channel 
is no longer being monitored because channel 16 has 
priority. 

During this time the 

PTT

 

may be pressed for normal 

transmissions on 

channel 16

. Once channel 16 has become 

inactive for 5 seconds the Dual Watch function will resume.

If a signal appears on the selected channel:

Scanning will pause on the selected channel BUT channel 
16 will continue to be monitored every 2 seconds. 

During 

this time the 

PTT

 may be pressed for normal transmissions 

on the 

selected channel

  (monitoring of channel 16 

ceases while transmitting). Once the selected channel has 
become inactive for 5 seconds the Dual Watch function  
will resume.

To Transmit on the selected Channel while  
Dual Watching:

Simply press the 

PTT

. The Dual Watch function will pause 

during the transmission and remain paused until 5 seconds 

after all activity has ceased on the channel. Dual Watch will 
then resume.

To Transmit on Channel 16 while Dual Watching: 

Press the 

16

 key to switch to channel 16. Dual watch will 

be cancelled and the radio will switch straight to Channel 
16. Now press the 

PTT

 and transmit in the usual way. When 

your conversation has ended, press the 

DW

 key to resume 

Dual Watching.

To change the Working Channel while  
Dual Watching:

While Dual Watching, simply select another working 
channel by either using the   or   keys or selecting one of 
the stored 

CHAN A

 or 

CHAN B

 memories. Dual Watching 

continues on the newly selected channel.

TRIPLE WATCH KEY (TW)

The Triple Watch function is an extension of the Dual Watch 
feature. It allows the GX600 to monitor Channel 16, a 
selected channel AND a priority channel. Each channel 
is scanned equally for signals with priority given first to 
CH 16, then the Priority channel and lastly the selected 
channel.

When Triple Watch is selected, the TW icon is displayed 
along with the selected channel number. The “priority” 
channel is the one stored in the 

CHAN A

 memory.

To use the Triple Watch mode, first program your priority 
channel (the default priority channel is 9) into the 

CHAN A

 

memory, then select your preferred working channel using 
the   or   keys. Now press and hold the 

TW

 key for 1.5 

seconds until a high beep is heard. ‘TW’ and the selected 
channel will be displayed.

To cancel Triple Watch

Either -   Briefly press the 

TW

 key to switch to Dual Watch 

mode. A high beep will be heard

or - 

 Press and hold the 

TW

 key to return to normal 

operation. A low beep will be heard.

TRIPLE WATCH FEATURES

If a signal appears on channel 16:

The radio will switch immediately to Channel 16 and CH 
16 will be displayed. At this point the selected channel and 
the Priority channel are no longer being monitored because 
channel 16 has highest priority. 

During this time the 

PTT

 

may be pressed for normal transmissions on channel 16.

 

Once channel 16 has become inactive for 5 seconds the 
Triple Watch function will resume.

PAGE 6 

INSTRUCTION MANUAL 

GX600

Summary of Contents for GX600

Page 1: ...VHF MARINE TRANSCEIVER GX600 I N S T R U C T I O N M A N U A L ...

Page 2: ... purchase a copy of the Maritime Radio Operator Handbook which is essential reading for every boat owner in Australia The Australian Maritime College AMC provides the marine examination and certificate service on behalf of the ACA The AMC can provide the details of organisations and individuals offering courses and or conducting exams For further information visit www amc edu au SAFETY INFORMATION ...

Page 3: ...ions system of extreme reliability and performance Please read this manual thoroughly to ensure you get the best from the GX600 s features FEATURES Compact Waterproof Design Selectable International USA and Canadian Channel Sets Selectable USA Weather Channels Dual Watch and Triple Watch with Programmable Priority Channel 10 Private Channels available Programmable Channel Scanning Selectable Power...

Page 4: ...the normal channel sequence below marine channel 01 They are selected in the usual way using or keys Weather channels are identified by the WX icon on the display Private Channels Private channels can be programmed into the GX600 for organisations that have been officially allocated special frequencies Private channels are programmed on application by your nearest GME branch office All requests for p...

Page 5: ...s and the colour of the backlighting can be adjusted Brightness Adjustment To set the brightness of the LCD backlighting briefly press the LAMP key Each press will cycle the following lamp illumination settings Illumination Colour The LCD backlighting can be set to illuminate in one of three colours Green Red or Orange To set the colour of the LCD illumination Turn the GX600 OFF Press and hold the ...

Page 6: ...hile Dual Watching Simply press the PTT The Dual Watch function will pause during the transmission and remain paused until 5 seconds after all activity has ceased on the channel Dual Watch will then resume To Transmit on Channel 16 while Dual Watching Press the 16 key to switch to channel 16 Dual watch will be cancelled and the radio will switch straight to Channel 16 Now press the PTT and transmi...

Page 7: ...hannel set is selected and private channels if they are enabled Note The transmitter is disabled while scanning If the PTT is pressed a low beep will be heard and the PTT is ignored To store channels for scanning Select the required channel using the or keys then press and hold the SCAN key for 1 5 seconds The channel number will flash a high beep with be heard and M will appear next to the channel...

Page 8: ...or direct water spray However we recommend you select a location that will minimise excessive exposure to water splashes or continuous rain Select a location that wont expose your radio to continuous direct sunlight which could cause overheating Ensure that the location allows a free flow of air around the heatsink on the back of the radio The microphone and all controls should be readily accessibl...

Page 9: ...t connector to match the extension speaker socket on the rear of the radio NOISE SUPPRESSION The inherent design of VHF FM transceivers results in a high level of resistance to ignition and electrical interference However in some installations it may be necessary to take additional steps to help reduce or eliminate noise interference During installation try to route the DC battery leads the antenn...

Page 10: ... Rejection 70 dB Intermodulation Rejection 75 dB Adjacent Channel Rejection 74 dB Blocking Rejection 100 dB RF Bandwidth 4 MHz Switching Bandwidth 10 MHz Frequency Response 6 dB per octave de emphasis 300 Hz 3 kHz 1 3 dB Audio Output Power 4 Watts average into external 4 Ohm speaker 2 Watts average into internal speaker Audio SN 50 dB weighted Conducted Spurious Emission 70 dBm Current Consumption...

Page 11: ...rectly installed resulting in damage to the transceiver s output circuit c Effects of water or moisture penetration d Non factory modifications Procedure to be followed by claimant In the event of a defect occurring during the warranty period the original Purchaser may return the defective unit along with suitable proof of purchase date i e receipt docket credit card slip etc and a full description...

Page 12: ...ollege Street GREENMOUNT Tel 03 9590 9333 THEBARTON 5031 CANNING VALE 6155 OXLEY 4075 GLADESVILLE 2111 Tel 09 274 0955 Fax 03 9590 9344 Tel 08 8234 2633 Tel 08 9455 5744 Tel 07 3278 6444 Tel 02 9879 8888 Fax 09 274 0959 Fax 08 8234 5138 Fax 08 9455 3110 Fax 07 3278 6555 Fax 02 9816 4722 For customers outside Australia and New Zealand please contact your local GME Distributor or email export gme ne...

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