MM-015371-001
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INTRODUCTION
This manual contains M7300 mobile radio and the CH-721 control head installation procedures for
motorcycle applications of these products. Procedures cover the mounting and cabling of the equipment,
as well as the basic test procedures. In addition, product safety-related information is included.
3.1 GENERAL DESCRIPTION
This installation and product safety manual covers motorcycle applications of the M7300 mobile radio.
Instructions for installing and testing the radio are included, along with applicable safety information.
The M7300 mobile radio is a high-performance dual-band digital mobile radio. Shown in Figure 5-4 on
page 27, the M7300 radio provides standard and advanced mobile radio communication functions. The
radio can operate with the following radio systems/standards:
•
OpenSky trunked radio networks using the OpenSky Trunking Protocol (OTP);
•
Enhanced Digital Access Communications System (EDACS) trunked radio networks;
•
ProVoice trunked radio networks;
•
APCO Project 25 Phase I compliant Common Air Interface (P25 CAI) trunked radio networks;
•
Conventional FM repeater-based and FM talk-around voice communications in accordance with the
TIA/EIA-603 conventional land-mobile radio standard.
Although the M7300 mobile radio is a dual-band 700 and 800 MHz mobile radio, as of
the publication of this manual, motorcycle installations are limited to the 800 MHz band
only.
In motorcycle applications, the M7300 mobile radio is mounted within a weather-resistant case. This case
is secured to the motorcycle’s frame behind the seat of the motorcycle. The control head is located near
the motorcycle operator’s position. The radio and case are shown in Figure 5-3 (page 26) and the radio is
shown in Figure 5-4 (page 27).
Control heads used with the M7300 mobile radio include the CH-721 Scan and the CH-721 System
model control heads. See Figure 8-1 (page 36) through Figure 8-3. Both heads feature a large 3-line
graphical vacuum-florescent display, front panel controls and buttons for user control of the mobile radio,
an internal high-power audio amplifier to drive an externally-connected speaker, and a front panel
microphone connector. The CH-721 System control head also has a 12-button numeric keypad that
provides Dual-Tone Multi-Frequency (DTMF) functionality and easier operator system/group selection
control at the control head’s front panel.
The radio is remotely controlled by a control head via a Controller Area Network (CAN) link between the
radio and control head. A 3-wire CAN cable provides the CAN link interconnection between the two
units. The CAN link carries digitized microphone and speaker audio, controlling data such as button
presses and radio messages, and user data such as that for a mobile data terminal connected to the serial
port of the radio or control head. For proper operation, the CAN link must be terminated appropriately on
each end.
As shown in Figure 8-3 on page 37, the CH-721 Scan and System model control heads have several
connectors located on the head’s rear panel. These connectors include a DC power connector, two (2)
CAN port connectors used for CAN link interconnections, an external speaker connector, a 9-pin serial
port connector for connecting optional equipment such as a mobile data terminal, and a 25-pin accessory
connector. Both CH-721 models can interface to an optional Federal Signal Electronic siren/light control
system for broadcasting via a public address (PA) speaker.
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