MM-010019-001, Rev. B
37
9
CONTROL HEAD INSTALLATION
9.1 GENERAL
INFORMATION
Since the M7200 is a remote-mount mobile radio, each radio must be connected to a control head to
provide the operator-to-radio interface. Two different control heads are available—the CH-721 Scan
model and the CH-721 System model. See Figure 9-1 and Figure 9-2 respectively. The CH-721 Scan
model control head features three (3) large menu selection buttons. The System model control head has a
12-button keypad to allow advanced operations without the need of a DTMF-capable microphone.
Figure 9-3 on page 38 illustrates the rear panel of the two control head models. Both models have
identical rear panels and rear panel connectors.
Figure 9-1: CH-721 Scan Model Control Head Front Panel
Figure 9-2: CH-721 System Model Control Head Front Panel
The CH-721 control heads feature a large easy-to-read 3-line graphical vacuum fluorescent display, an
on/off/volume control knob, menu controls and buttons, trunking mode buttons, an emergency/home
button, a scan on/off/volume control, and three (3) preset buttons. Other front panel components include a
microphone connector and LED-type indictors. One LED indicator is the busy indicator that lights when
12-Button Keypad
Clear Button
Menu Button
Option Button
3-Line Graphical Vacuum
Fluorescent Display
Microphone Connector
On/Off/
Volume
Control
Group
Selection
Control
Ramp Control
Preset/
Softkey
Buttons
Emergency/
Home Button
Scan Add/Delete
Control
Ambient Light-Level Sensor
Transmit
and Busy
Indicators
Scan On/Off Button
Clear Button
Menu Button
Option Button
