Installation Guide
Table Of Contents
- Contents
- List of Figures
- List of Tables
- Foreword
- Installation Requirements for Compliance with Radio Frequency (RF) Energy Exposure Safety Standards
- Document History
- Related Publications
- Notations Used in This Manual
- Mobile Radio Model Numbering Scheme
- Commercial Warranty
- Introduction
- Installation Details for Standard Configurations
- Options and Accessories Installation
- Best Practices: Installation & Troubleshooting
- 4.1 Check Wiring of Ignition and Radio Ignition Sensing
- 4.2 Check Physical Installation of Radio Ground and Radio Accessory Wiring
- 4.3 Improving the Electrical Quality of the Power and Ignition Lines
- 4.4 Jump-Start the Vehicle
- 4.5 Eliminate Noise/Howling from PA Speaker
- 4.6 Eliminating False Emergency Alert Triggering
- Appendix A: Replacement Parts Ordering
- Appendix B: Motorola Solutions Offices
- Glossary
- Analog
- Band
- Customer Programming Software
- Default
- Digital
- Digital Private-Line
- Dispatcher
- Federal Communications Commission
- Frequency
- General-Purpose Input/Output
- Global Navigation Satellite System
- Integrated Circuit
- kilohertz
- Liquid-Crystal Display
- Light Emitting Diode
- Motorola Digital Communications
- Megahertz
- Paging
- Printed Circuit Board
- Private-Line Tone Squelch
- Programming Cable
- Receiver
- Repeater
- Radio Frequency
- Signal
- Spectrum
- Squelch
- Time-out Timer
- Tone Private Line
- Transceiver
- Transmitter
- Trunking Priority Monitor Scan List
- Ultra-High Frequency
- Universal Serial Bus
Chapter 4
Best Practices: Installation &
Troubleshooting
In this section are Motorola Solutions recommended vehicle installation practices that can address or
prevent many issues, including:
• Radio circuit damage due to over voltage condition
• Radio/Accessories "lock up"
• Radio/Accessories change state/lock-up when radio PTT is depressed
• Radio intermittently resets
• Alternator whine present when transmitting with engine running
• Radio/Accessories turn themselves on/off
• Radio sending false emergency alerts at vehicle cranking or during battery maintenance
4.1
Check Wiring of Ignition and Radio Ignition Sensing
• If it is required to turn the radio on and off through the ignition sense switch, in addition to the
control head on/off switch, connect the ignition sense lead to the accessory terminal from the
ignition switch (usually in the vehicle fuse panel under accessory or radio).
NOTICE: Motorola Solutions recommends protecting or isolating the radio ignition sense
input from voltage spikes in excess of +/- 40 VDC. Such spikes can be hundreds of volts in
amplitude and are common in larger vehicles (utility trucks, buses and others), especially
when the source is common to a solenoid coil. A triggerable oscilloscope is required to
determine the existence of such spikes as most voltmeters cannot measure in short duration
(< 1 msec). If the condition of the intended ignition sense source is unknown, Motorola
Solutions recommends isolating the source from the radio with a relay or the use of a
suppression diode wired between the source and ground. Any high current suppression
diode that is MR2535 with a breakdown voltage of between 18 and 40 V suffices. A suitable
diode kit is available from Motorola Solutions parts, kit number HLN6325_.
• If it is required to have the radio power up only through the control head on/off switch, then connect
the ignition sense lead directly to the positive terminal of the battery. This means the ignition sense
is always ignored and a re-wiring is necessary in the future if the operator chooses any ignition
sense CPS setting.
4.2
Check Physical Installation of Radio Ground and Radio
Accessory Wiring
• Take care to scrape away paint on the chassis at the place where the ground connection is to be
made, and try to keep the ground lead as short as possible.
• Verify that the red A+ lead is connected directly to the positive terminal of the battery and the black
ground lead is connected to the vehicle chassis using a wire with practical length.
• For vehicles that have other types of electronic equipment installed such as lights, flashers,
computers siren, PA, and others, use a separate ground for the mobile radio equipment.
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Best Practices: Installation & Troubleshooting
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