Technical Manual

GUARDIAN VHF 110W MOBILE 1-1
CHAPTER 1: GENERAL INFORMATION
1.1 Scope
This manual provides technical information for the Guardian 110 Watt mobile radio system.. This chapter gives a
general description and provides a system block diagram. Chapters 2 and 3 provided detailed theory of operation for
hardware and software portions of the radio. Chapter 4 provides general operation of the radio. Chapter 5 is the
physical description of the radio components and the available accessories. Chapters 6 and 7 describe servicing,
testing, and troubleshooting the radio system. The remaining chapters provide additional technical information and
schematics.
1.2 General Description
The Guardian 110W mobile radio system is compliant with the APCO project 25 FDMA common air interface, and
is also compatible with conventional wideband FM systems and newer narrowband FM systems. It provides fully
digital encrypted communication suitable for use by modern public safety and commercial users. The radio system is
built from a remote power amplifier and a control head. The 110W RF power amplifier mounts in a remote location
such as a vehicle trunk, while the control unit is mounted in the cabin. The two are connected by a single coaxial
cable. The cable carries both the RF signal and control signals (PTT, and power level setting).
1.3 Performance Specifications
Model Designation Guardian VHF Mobile Radio
General Model G25RMV110
Frequency Range 136.000 to 174.000 MHz
Banks, Zones, Channels, Shadow 4 banks, 16 zones, 256 channels, 7 shadow
Voice Digital Mode Voice Coding
Frame Re-sync Interval
Error Correction Method
IMBE™ 4.4 kb
180 msec
RS, golay, hamming
Input Voltage 13.6 Vdc, negative chassis ground
Current Drain @ 13.8V: Standby
Receive @ Rated Audio
Transmit @ Rated Power
0.5A
3.0A
28.0A
Mounting Dashboard mounted, including bracket
Dimensions 2.75” x 7.1” x 5.5” (H x W x D)
Weight
Control Head
Remote Unit
2.5 lb
12 lb
Case Metal and plastic
Temperature Range -30° to +60°C
Channel Spacing 12.5 and 25 kHz, selectable in 2.5 or
3.125 kHz steps
FCC Type Acceptance Number Pending
Industry Canada Pending