Datron World Communications Inc G25RMV100 User Manual

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Guardian VHF Mobile 

10

Squelch is also adjustable from the main menu.  For more information, refer 
to the Radio Settings section. 

Transmit Inhibit Override 
If the radio is set for transmit inhibit override, press 

 twice quickly to 

transmit over an existing conversation on the channel.  For more information, 
refer to the Radio Settings section. 

Emergency Call 
To activate, use the external user-supplied emergency switch (radio must be 
programmed).  The radio initiates and continues in an emergency call state 

until the emergency call is deactivated.  
To deactivate, press and hold the external user-supplied emergency switch 
(radio must be programmed) until the radio beeps, or power off the radio with 

the power-volume knob. 
For information about setting the emergency switch to normal or silent, refer 
to the Radio Settings section. 

Selecting Encryption 
Selection of encrypted or plain mode is automatic since channels are 

programmed for plain or encrypted mode.  If you attempt to reprogram the 
radio from encrypted to plain, the radio generates an alert tone when 

 is 

pressed for an encrypted channel.  For more information, refer to the Radio 

Settings section. 

Transmitting 
Press the 

 button and speak at a normal level about 4 inches from the 

microphone.  Release the 

 button when finished speaking.  Do not hold 

the 

 longer than necessary after talking.  Channels programmed for receive-

only operation sound an alert tone, display 

, and do not transmit. 

Zeroizing Encryption Buttons 
Use the external user-supplied emergency switch to zeroize (radio must be 

programmed) the encryption buttons.  Selective zeroization is performed using 
the programming (

) menu, if enabled.  For additional zeroizing 

information, refer to the Radio Settings section.