Technical Manual

GUARDIAN VHF 110W MOBILE 5-3

5.2.1.6 Programmable Keys

Three programmable keys are located on the front panel of the radio. These keys are programmed using the PC

programmer for the following functions:

• Backlight dim/bright/off (for future use)

• Encryption on/off

• Scan list add/delete

• Keypad disable (for future use)

• Monitor on/off

• Scan on/priority/off

• Signal strength meter on/off

• Talkaround

• On/off

• Home channel

• Audible tones on/off (for future use)

• Next zone (future use)

• Open microphone (for future use)

• Previous channel (for future use)

• Disabled

5.2.1.7 Optional Emergency Button

Program the emergency button for emergency operation or for zeroize operation. If programmed for emergency

operation, pressing the button activates the emergency calling. The emergency condition remains active until

cleared by turning off the radio. When the emergency mode is activated, an emergency message is broadcast over

the emergency channel. There are two programmable modes: audio (full alert and silent), and display (alert and

silent). In full-alert mode, EMERGENCY flashes on the display and an audio tone is sounded. In silent mode, there

is no audio tone and no LED indication. If the emergency button is programmed for zeroize operation, all

encryption keys contained in the radio are erased.

5.2.1.8 Optional DTMF Microphone

The optional DTMF microphone includes a 12-button keypad with positive feedback on the front panel. The keypad

provides adjustable backlighting for nighttime viewing.

5.2.2 Indicators

5.2.2.1 LCD

The radio contains a full graphics 80 x 32 pixel LCD that uses characters and graphics to provide the operator with

radio operating information. The display provides backlighting for nighttime operation.

5.2.2.2 LED

The 3-color LED provides the operating status of the radio. The LED is viewable from front panel of the radio and

provides radio status as follows:

LED Indication

Red Transmitting

Green Receiving/busy channel indicator

Flashing green Receiving encrypted transmission

Orange Emergency/low dc power voltage