Setting The Id Of The Initial Control Head; All Active Mode; Activating And Deactivating Intercom In All Active Mode - Motorola APX Series User Manual

The Multiple Control Head (MCH) feature consists of two modes that can be programmed through
Customer Programming Software (CPS):
•

All Active mode

• One Active mode
NOTICE: If two or more control heads are connected to the system before enabling the MCH
feature in the CPS, the radio displays EXTRA CH or CH ID # ERR. Both errors are Fatal.
6.3.1

Setting the ID of the Initial Control Head

When and where to use: This feature allows you to set up the control head in the Front Panel
Programming (FPP) mode. During the setup, the control heads are defined as Control Head Number
1, Control Head Number 2, Control Head Number 3, and Control Head Number 4.
Procedure:
1 Power off the radio by pressing the Power button.
2 Press and hold the left-most Menu Select button and the emergency button simultaneously.
3 While continuing to depress these two buttons, press the Power button to power on the radio
and the control head.
The radio and the control head powers on into FPP mode. The display shows the ID number of
the control head.
4 Turn the Mode knob to change the ID number of the control head.
5 Press the Power button to power off the radio and exit FPP mode.
6 Repeat step 1 to step 5
6.3.2
All Active Mode
The All Active mode enables all connected control heads attached to the radio to operate concurrently
with each other. When you activate a feature on one control head, the rest of the control heads have
the same activated features and indicators on their respective display.
NOTICE: The multiple control head feature allows only control heads of the same type to be
connected. Upon power-up, if a control head of a different type is connected to the radio, the
display of all the attached control heads shows the FATAL error CH MISMATCH.
6.3.3

Activating and Deactivating Intercom in All Active Mode

Prerequisites: This feature only applies to control heads in the All Active mode.
When and where to use: The intercom feature allows one control head user to talk to another control
head user in a MCH configuration. At any given time, when a control head being operated has priority
for the intercom call, all other control heads are blocked until the active control head releases PTT
button.
Procedure:
1 Press the Menu Select button directly below INTC to activate the intercom feature of any of the
control heads.
to set the ID number for the rest of the attached control heads.
6875947M01-HM
Advanced Features
45