Motorola APX 4000 User's Guide download pdf (Page 145)

Advanced Features

English

Using the PL Defeat Feature

This feature allows you to override any coded squelch (DPL or

PL) that might be preprogrammed to a channel. The radio will

also unmute to any digital activity on a digital channel.

Procedure:

Place the preprogrammed PL Defeat button in the PL Defeat

position. You hear any activity on the channel.

The radio is muted if no activity is present.

Note: When this feature is active, the Carrier Squelch status

indicator is displayed.

Using the Digital PTT ID Feature

This feature allows you to see the radio ID (number) of the radio

from whom you are currently receiving a transmission. This ID,

consisting up to a maximum of eight characters, can be viewed

by both the receiving radio and the dispatcher.

Your radio’s ID number is also automatically sent every time the

PTT button is pressed. This is a per-channel feature. For digital

voice transmissions, your radio’s ID is sent continuously during

the voice message.

Using the Smart PTT Feature (Conventional Only)

Smart PTT is a per-personality, programmable feature used in

conventional radio systems to keep radio users from talking

over other radio conversations.

When smart PTT is enabled in your radio, you cannot transmit

on an active channel.

If you try to transmit on an active smart-PTT channel, you hear

an alert tone, and the transmission is inhibited. The LED lights

up solid yellow to indicate that the channel is busy.

Three variations of smart PTT are available:



Mode Description

Transmit Inhibit

on Busy Channel

with Carrier

You cannot transmit if any traffic is

detected on the channel.

Transmit Inhibit

on Busy Channel

with Wrong

Squelch Code

You cannot transmit on an active

channel with a squelch code or

(if secure-equipped) encryption key

other than your own. If the PL code is

the same as yours, the transmission is

not prevented.

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Motorola APX 4000 User's Guide Page 145

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