Motorola XPR 4380 用户手册

You can customize your radio’s power setting to high or low for 
each channel.

Settings: High enables communication with radios located at a 
considerable distance from you. Low enables communication 
with radios in closer proximity.

Press the programmed Power Level button.

You hear a positive indicator tone, indicating the radio is 
transmitting at low power.
OR
You hear a negative indicator tone, indicating the radio is 
transmitting at high power.

A channel can support up to 6 option board features. Refer to 
your dealer or system administrator for more information.

Procedure: 
Press the programmed Option Board Feature button to toggle 
the feature on or off.

This feature allows you to initiate a hands-free voice activated 
call on a programmed channel. The radio automatically 
transmits, for a programmed period, whenever the microphone 
on the VOX-capable accessory detects voice.

NOTE: You may need to turn off the radio and power it up 

again after detaching the VOX-capable microphone 
to allow the radio to switch to another valid accessory.

Pressing the PTT button during radio operation will disable 
VOX. To re-enable VOX, do one of the following:

Turn the radio off and power it on again, OR

Change the channel via the Channel Rocker, OR

Follow the procedure below.

NOTE: Turning this feature on or off is limited to radios with 

this function enabled. Check with your dealer or system 
administrator for more information.

Procedure: 
Press the programmed VOX button to toggle the feature on or 
off.