Motorola III General Radio Features Operation, Low-Battery Alert, Coded Squelch Operation

21 General Radio Features Operation

Low-Battery Alert

The radio will emit an alert tone to indicate a low- battery condition if the battery voltage falls below the low-voltage level. The tone will be emitted when the PTT is released in the transmit mode, and when the low- battery condition is detected in the receive mode.

Coded Squelch Operation

Tone Private-Line® (PL), Digital Private-Line™ (DPL), and carrier squelch operation are all available in the same radio, on a per-mode basis. When in carrier squelch operation, all traffic on the mode is heard. When in PL or DPL operation, your radio responds to only those messages intended for you. When this feature is mode-slaved, PL, DPL, or carrier squelch is programmed to each mode, and you need not move any switches for activation. Alternatively, this feature can be programmed to the ABC switch: carrier squelch operation in one switch position, and PL or DPL operation in another switch position.

Whenever the radio is operating in carrier squelch, the display will show the carrier-squelch annunciator.

SECURENET Operation

This information applies to both conventional and trunked systems.

1.A SECURENET module must be installed in the radio.

2.An encryption key must be loaded from a key- variable loader (KVL), using the correct loader for the radio’s encryption type, into the radio’s memory. To load the key, connect the keyloader cable to the universal connector on the side of the radio; refer to the KVL’s instruction manual for loading procedure. While the keyloader is attached, the display shows “KEYLOADING.” When the key has been loaded successfully, the radio will sound one long beep.

Notes:

•Normal radio transmit and receive will be disabled while the cable is connected to the radio.

•The radio will abort a secure transmission when there is not a valid encryption key. When this happens, the display shows “KEYFAIL,” and a continuous keyfail tone (consecutive medium-pitched beeps) sounds until the PTT switch is released.