MM-010019-001, Rev. B
38
the radio is receiving a call and one is the transmitter-enabled indicator that lights when the radio is
transmitting. The front panel also has an ambient light sensor for automatic display dimming.
Figure 9-3: CH-721 Rear Panel (both control head models)
Prior to installing the control head, verify it has the proper software version installed and
verify it has been properly configured for customer use.
Because the Control Head Installation Kit MAMV-ZN7N contains the most complete set
of materials for installing the control head, the following instructions make repeated
reference to this kit. Item numbers given in parenthesis below refer to items in the kit.
See Table 4-3 on page 18 for a complete listing of kit contents.
In a mobile installation, more than one control head can be connected to one mobile radio for multi-head
installations. A multi-head installation may be required in a vehicle such as a fire truck or any large
vehicle where more than one operator may require use of the radio. Multi-head installations also provide
other benefits such as intercom functionality.
CAN Port
Connectors
(2 places)
Speaker Audio
Connector
Serial Port Connector
(DB-9)
DC Power
Connector
Accessory Connector
(DB-25)
Note: Serial and Accessory connectors are
shown without waterproof covers.
