Operator's Manual

DATRON WORLD COMMUNICATIONS INC.

Guardian VHF Mobile

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

PTT 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

PTT is

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

Settings section.

Transmitting

Press the

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

microphone. Release the

PTT button when finished speaking. Do not hold

the

PTT longer than necessary after talking. Channels programmed for receive-

only operation sound an alert tone, display

RX ONLY, 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 (

PROGRM) menu, if enabled. For additional zeroizing

information, refer to the Radio Settings section.