Motorola Solutions 92FT3800 PDR 3500 Portable Repeater User Manual 93C75 O Book

Motorola Solutions, Inc. PDR 3500 Portable Repeater 93C75 O Book

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Instruction Manual HTML Version

1. Instruction Manual
2. Modified Users Manual

Instruction Manual

PDR 3500

Portable Repeater

Basic Service Manual

Table of Contents

1 - Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Manual Revisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Computer Software Copyrights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Replacement Parts Ordering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Motorola Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Related Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 - Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Safe and Efficient Operation of Motorola Two-way Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

RF Operational Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Exposure to Radio Frequency Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Electromagnetic Interference/Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Facilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Aircraft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Medical Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Operational Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Operational Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Mobile Radio Operation and EME Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

3 - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Compact Mechanical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

State-of-the-Art Electrical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Transmitter Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Receiver Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Station Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Wireline Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Switching Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Optional Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

4 - System Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Two Antenna Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

External Duplexer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Repeater RA or Cross Band Repeater Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

5 - Models and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Model Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Maintenance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

6 - Approved Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

, Motorola, ASTRO, ASTRO CAI, and SECURENET are trademarks of Motorola, Inc.

Commercial, Government, Industrial Solutions Sector

8000 W. Sunrise Blvd., Fort Lauderdale, FL 33322

7 - Setup and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Programming with RSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Connecting PC to

PDR 3500 RSS Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Using the RSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Channel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

RF Cabling Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Separate RX and TX Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Duplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

8 - Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Summary of Switches, Pushbuttons, and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Summary of LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

9 - Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Test Equipment List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Procedure 1: Routine Maintenance Functional Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Procedure 2: Troubleshooting A Reported/Suspected Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

How to Use These Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Interpreting LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Interpreting Alarm Alert Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

Verifying Transmitter Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11

Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11

Verifying Transmitter Circuitry Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11

Verifying Receiver Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

Verifying Receiver Circuitry Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

Verifying Receiver Circuitry (Digital-Capable Stations) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-21

Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22

Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-23

Module Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

General Replacement Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

Anti-Static Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

Care of Gold-Plated Connector Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26

Power Down Station Before Removing/Inserting Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26

Validating Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26

Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26

Station Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27

Physical Replacement of the Station Control Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27

After Installing the New Station Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-27

Wireline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28

Physical Replacement of the Wireline Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28

After Installing the New Wireline Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

ASTRO Modem Card/V.24 Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

Physical Replacement of the Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

After Installing the New Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

iii

Physical Replacement of the Receiver Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29

After Installing the New Receiver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30

Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31

Frequency Band Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31

Physical Replacement of the Exciter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31

After Installing the New Exciter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-31

Power Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-32

Frequency Band Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-32

Physical Replacement of the Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-32

After Installing the New Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-33

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-33

Physical Replacement of the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-33

Backplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-34

Before Installing the New Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-34

Physical Replacement of the Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-34

After Installing the New Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-35

Preselector Field Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-35

Required Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-36

VHF Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-36

Calculating Proper Alignment Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-36

Preparing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-37

VHF Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-38

UHF Tuning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39

Calculating Proper Alignment Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39

Preparing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40

Tuning Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-41

10 - Functional Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1

Transmitter Circuitry Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Exciter Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Power Amplifier Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Receiver Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Receiver Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Station Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Station Control Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Wireline Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Wireline Interface Board Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Power Supply Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

11 - Block Diagram, Schematics, Electrical Parts List, and Circuit Board Detail11-1

List of Tables

Table 1: Rated Power and Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Table 2: Model Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 3: Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 4: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 5: Specifications, continued . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 6: Switches, Pushbuttons, and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Table 7: Summary of LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Table 8: Switches, Pushbuttons, and LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Table 9: PDR 3500 Station LED Indicator Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Table 10: Motherboard DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-34

List of Figures

Figure 1.EIA-232 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Figure 2. Switches , Pushbuttons , Connectors, and LED Indicators for PDR 3500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Figure 3. PDR 3500 Station Troubleshooting Overview (Procedure 1: Routine Maintenance). . . . . . . . . . . . . . . . . . . . 9-3

Figure 4. PDR 3500 Station Troubleshooting Overview

(Procedure 2: Reported or Suspected Problem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Figure 5. PDR 3500 LED Indicators and Front Panel Buttons and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

Figure 6. Test Equipment Setup for Verifying Transmitter Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12

Figure 7. Test Equipment Setup for Verifying Receiver Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17

Figure 8A. Coupled receiver connection. (Top) B. Coupled duplexer connection. (Bottom) . . . . . . . . . . . . . . . . . . . . 9-19

Figure 9. Disabling the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20

Figure 10. Interconnect Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24

Figure 11. Chassis Ground Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

Figure 12. Test Equipment Setup for Preselector Field Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-38

Figure 13. Location of Tuning Screws and Cavity Probe Holes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-39

Figure 14. Test Equipment Setup for Preselector Field Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-41

Figure 15. Location of Tuning Screws and Cavity Probe Holes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-42

Figure 16. PDR 3500 Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

Figure 17. PDR 3500 Schematic Sheet 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3

Figure 18. PDR 3500 Schematic Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4

Figure 19. PDR 3500 Backplane Circuit Board Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-6

68P81093C75-O September 27, 2000 1-1

Foreword

General

The information contained in this manual supplement relates to all

PDR 3500 stations, unless otherwise speciﬁed. This manual

provides sufﬁcient information to enable service shop personnel to

troubleshoot and repair a PDR 3500 to the module level.

Safety Information

Before operating a PDR 3500 station, please read the “Safety

Information” section in the front of this manual.

Manual Revisions

Changes which occur after this manual is printed are described in

“FMRs.” These FMRs provide complete information on changes,

including pertinent parts list data.

Computer Software

Copyrights

The Motorola products described in this manual may include

copyrighted Motorola computer programs stored in semiconductor

memories or other media. Laws in the United States and other

countries preserve for Motorola certain exclusive rights for

copyrighted computer programs, including the exclusive right to

copy or reproduce in any form the copyrighted computer program.

Accordingly, any copyrighted Motorola computer programs

contained in the Motorola products described in this manual may not

be copied or reproduced in any manner without the express written

permission of Motorola. Furthermore, the purchase of Motorola

products shall not be deemed to grant either directly or by

implication, estoppel, or otherwise, any license under the

copyrights, patents or patent applications of Motorola, except for the

normal non-exclusive royalty free license to use that arises by

operation of law in the sale of a product.

Replacement Parts

Ordering

When ordering replacement parts or equipment information, the

complete identiﬁcation number should be included. This applies to

all components, kits, and chassis. If the component part number is

not known, the order should include the number of the chassis or kit

of which it is a part, and sufﬁcient description of the desired

component to identify it.

1-2 September 27, 2000 68P81093C75-O

Crystal and channel element orders should specify the crystal or

channel element type number, crystal and carrier frequency, and the

model number in which the part is used.

Parts Ordering

7:00 A. M. to 7:00 P. M. (Central Standard Time)

Monday through Friday (Chicago, U. S. A.)

Domestic (U. S. A.): 1-800-422-420, or 847-538-8023

1-800-826-1913, or 410-712-6200 (Federal Government)

TELEX: 280127

FAX: 1-847-538-8198

FAX: 1-410-712-4991 (Federal Government)

Domestic (U. S. A.) after hours or weekends:

1-800-925-4357

International: 1-847-538-8023

Motorola Parts

Accessories and Aftermarket Division

(United States and Canada)

Attention: Order Processing

1313 E. Algonquin Road

Schaumburg, IL 60196

Accessories and Aftermarket Division

Attention: International Order Processing

1313 E. Algonquin Road

Schaumburg, IL 60196

Parts Identiﬁcation

1-847-538-0021 (Voice)

1-847-538-8194 (FAX)

Related Documents

Quantar User’s Guide

(Motorola part number 68P81095E05)

RSS User’s Guide

(Motorola part number 68P81085E35)

68P81093C75-O September 27, 2000 2-1

Safety Information

General

This section contains important information on safe and efﬁcient

operation. Read this information before using your radio.

Safe and Efﬁcient

Operation of

Motorola Two-way

Radios

The information provided in this document supersedes the general

safety information contained in user guides published prior to July

2000. For information regarding radio use in a hazardous

atmosphere please refer to the Factory Mutual (FM) Approval

Manual Supplement or Instruction Card, which is included with

radio models that offer this capability.

RF Operational

Characteristics

Your radio contains a transmitter and a receiver. When it is ON, it

receives and transmits radio frequency (RF) energy.

Exposure to Radio

Frequency Energy

Your Motorola radio is designed to comply with the following

national and international standards and guidelines regarding

exposure of human beings to radio frequency electromagnetic

energy (EME):

•

United States Federal Communications Commission, Code of

Federal Regulations; 47 CFR part 2 sub-part J

•

American National Standards Institute (ANSI) / Institute of

Electrical and Electronic Engineers (IEEE) C95. 1-1992

•

Institute of Electrical and Electronic Engineers (IEEE) C95.1-

1999 Edition

•

National Council on Radiation Protection and Measurements

(NCRP) of the United States, Report 86, 1986

•

International Commission on Non-Ionizing Radiation Protection

(ICNIRP) 1998

•

National Radiological Protection Board of the United Kingdom

1995

•

Ministry of Health (Canada) Safety Code 6. Limits of Human

Exposure to Radiofrequency Electromagnetic Fields in the

Frequency Range from 3 kHz to 300 GHz, 1999

2-2 September 27, 2000 68P81093C75-O

•

Australian Communications Authority Radiocommunications

(Electromagnetic Radiation - Human Exposure) Standard 1999

(applicable to wireless phones only)

Electromagnetic

Interference/

Compatibility

NOTE:

Nearly every electronic device is

susceptible to electromagnetic interference

(EMI) if inadequately shielded, designed or

otherwise conﬁgured for electromagnetic

compatibility.

Facilities

To avoid electromagnetic interference and/or compatibility

conﬂicts, turn off your radio in any facility where posted notices

instruct you to do so. Hospitals or health care facilities may be using

equipment that is sensitive to external RF energy.

Aircraft

When instructed to do so, turn off your radio when on board an

aircraft. Any use of a radio must be in accordance with applicable

regulations per airline crew instructions.

Medical Devices

• Pacemakers

The Health Industry Manufacturers Association recommends that a

minimum separation of 6 inches (15 cm) be maintained between a

handheld wireless radio and a pacemaker. These recommendations

are consistent with the independent research by, and

recommendations of, Wireless Technology Research.

Persons with pacemakers should:

•

ALWAYS keep the radio more than 6 inches (15 cm) from their

pacemaker when the radio is turned ON.

•

not carry the radio in the breast pocket.

•

use the ear opposite the pacemaker to minimize the potential for

interference.

•

turn the radio OFF immediately if you have any reason to

suspect that interference is taking place.

• Hearing Aids

Some digital wireless radios may interfere with some hearing aids.

In the event of such interference, you may want to

consult your hearing aid manufacturer to discuss alternatives.

• Other Medical Devices

If you use any other personal medical device, consult the

manufacturer of your device to determine if it is adequately shielded

from RF energy. Your physician may be able to assist you in

obtaining this information.

68P81093C75-O September 27, 2000 2-3

Operational Warnings

•

Vehicles with an air bag

•

Potentially explosive atmospheres

•

Blasting caps and areas

Operational Cautions

•

Damaged antennas

•

Batteries

Mobile Radio Operation

and EME Exposure

To assure optimal radio performance and that human exposure to

radio frequency electromagnetic energy is within the guidelines

referenced earlier in this document, transmit only when people

outside the vehicle are at least the minimum distance away from a

properly installed, externally-mounted antenna.

WARNING: Do not place a portable radio in the area over an air bag or in the air bag deploy-

ment area. Air bags inﬂate with great force. If a portable radio is placed in the air bag deploy-

ment area and the air bag inﬂates, the radio may be

propelled with great force and cause serious injury to occupants of the vehicle.

WARNING: Turn off your radio prior to entering any area with a potentially explosive atmo-

sphere, unless it is a radio type especially qualiﬁed for use in such areas as “Intrinsically

Safe” (for example, Factory Mutual, CSA, or UL Approved). Do not remove, install, or charge

batteries in such areas. Sparks in a potentially explosive atmosphere can cause an explo-

sion or ﬁre resulting in bodily injury or even death.

NOTE:

The areas with potentially explosive atmospheres referred to above include fueling

areas such as below decks on boats, fuel or chemical transfer or storage facilities,

areas where the air contains chemicals or particles, such as grain, dust or metal

powders, and any other area where you would normally be advised to turn off your

vehicle engine. Areas with potentially explosive atmospheres are often but not

always posted.

WARNING: To avoid possible interference with blasting operations, turn off your radio when

you are near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way

radio.” Obey all signs and instructions.

CAUTION: Do not use any portable radio that has a damaged antenna. If a damaged antenna

comes into contact with your skin, a minor burn can result.

CAUTION: All batteries can cause property damage and/or bodily injury such as burns if a

conductive material such as jewelry, keys, or beaded chains touch exposed terminals. The

conductive material may complete an electrical circuit (short circuit) and become quite hot.

Exercise care in handling any charged battery, particularly when placing it inside a pocket,

purse, or other container with metal objects.

2-4 September 27, 2000 68P81093C75-O

The table below lists the minimum distance for several different

ranges of rated radio power.

Antenna Installation

Mobile Antennas

Recommended mobile antenna installations are limited to metal

body vehicles at the center of the roof and center of the trunk

deck locations.

The antenna installation must additionally be in accordance with:

a. The requirements of the antenna manufacturer/supplier

b. Instructions in the Radio Installation Manual

Fixed Site Antennas

Mobile radio equipment is sometimes installed at a ﬁxed location

and operated as a control station or as a ﬁxed unit. In such cases the

antenna installation must comply with the following requirements in

order to assure optimal performance and make sure human exposure

to radio frequency electromagnetic energy is within the

guidelines set forth in the above standards.

•

The antenna must be mounted outside the building.

•

Mount the antenna on a tower if at all possible.

•

If the antenna is to be mounted on a building then it must be

mounted on the roof.

•

As with all ﬁxed site antenna installations, it is the responsibility

of the licensee to manage the site in accordance with applicable

regulatory requirements and may require additional compliance

actions such as site survey measurements, signage, and site

access restrictions in order to insure that exposure limits are not

exceeded.

Table 1: Rated Power and Distance

Rated Power of Vehicle-Installed

Mobile Two-Way Radio Minimum Distance from

Transmitting Antenna

7 to 15 Watts 1 Foot (30.5 Centimeters)

16 to 50 Watts 2 Feet (61 Centimeters)

More than 50 Watts 3 Feet (91.5 Centimeters)

68P81093C75-O September 27, 2000 3-1

Introduction

General

The Motorola PDR 3500 Station provides conventional analog,

ASTRO™

ASTRO CAI™

, and

SECURENET™

capabilities in a

compact, software-controlled design. The station architecture and

microprocessor-controlled Station Control Module allow for fast

and reliable upgrading. FLASH memory in the Station Control

Module allows software updates to be performed locally (using

serial port), or remotely via modem.

Compact Mechanical

Design

The entire unit is housed in a lockable rugged, black aluminum

extruded case weighing approximately 4l lbs. Internal components

are mounted in a custom, removable chassis, designed to ﬁt a 19"

rack.

State-of-the-Art

Electrical Design

Transmitter Circuitry

The station transmitter circuitry is designed for 50% duty cycle

operation at full rated power. Output power is continuously

monitored by an internal calibrated wattmeter. The wattmeter output

feeds a power control loop, continually adjusting and maintaining

the desired output power. All adjustments are electronic, including

deviation and output power.

Receiver Circuitry The station receive circuitry features multiple bandwidth capability

(12.5, 25, or 30 kHz, depending on band), as well as ASTRO digital

operation. Injection signals for the 1st and 2nd local mixers are

generated by frequency synthesizer circuitry and are electronically

controlled by the Station Control Module. All receive signals

(analog, SECURENET, ASTRO, and ASTRO CAI) are detected and

digitized before being sent to the Station Control Module; this

provides improved audio quality, consistent throughout the coverage

area.

Station Control Module The Station Control Module is microprocessor-based and features

extensive use of ASIC and digital signal processing technology. The

module serves as the main controller for the station, providing signal

processing and operational control for the station modules.

3-2 September 27, 2000 68P81093C75-O

Wireline Circuitry The station wireline circuitry provides a wide variety of telephone

interfaces, including analog, ASTRO, ASTRO CAI, SECURENET,

Tone Remote Control, and DC Remote Control. Telephone line

connections are easily made to the wireline circuitry via connectors

on the top panel.

Switching Power

Supply The station features a switching-type power supply, accepting a

wide range of AC inputs (85-265 VAC, 49-61 Hz). The power supply

generates 13.8 VDC for the station modules.

Standard Features •Compact single case design

•Extensive Self-Test Diagnostics and Alarm Reporting

•FRU maintenance philosophy

•Easily programmed via Radio Service Software

•Local or Remote Software downloading to FLASH memory

•Upgrades performed by module replacement and/or software

upgrade

• Compatible (with appropriate options) with analog,

SECURENET, ASTRO, and ASTRO CAI digital signaling

•Versatile and reliable switching-type power supply

•Wide operating temperature range: -30˚ C to + 60˚C (-22˚ F to

+140˚ F)

Optional Hardware

Features •Duplexer Option – allows a single antenna to serve for both

transmitter and receiver circuitry for repeater applications.

•Antenna Relay Option – allows a single antenna to be switched

between transmitter and receiver.

•ASTRO Modem – allows connection (for ASTRO digital

signaling) to a console through a Digital Interface Unit (DIU) in

an ASTRO system, also allows connection to another ASTRO

Modem for digital Cross-Patch.

68P81093C75-O September 27, 2000 4-1

System Applications 4

Local Control The PDR 3500 is an APCO 25 digital repeater. The station is

identical in operation to the Quantar station, hence there is no local

control capability. There is no digital-to-audio translation within the

station. Local control style operation can be accomplished in several

ways:

a. A portable radio may be used as an RF control station talking to

the repeater.

b. The station may be equipped with the wireline and the modem

options and routed through a DIU to a tone remote console. The

Tone remote console controls the station via wireline through the

DIU. The wireline in this case is a local 4-wire cable.

Two Antenna

Operation The PDR 3500 Portable Digital Repeater may be operated with the

internal duplexer, using a single antenna. The duplexer provides the

necessary electrical isolation between the transmitter and the

receiver frequencies for repeater operation. The same isolation can

be obtained by physically separating transmit and receive antennas

either horizontally or vertically. The repeater requires approximately

50 dB isolation between the transmit and receive antennas for proper

operation.

The Isolation values shown are for dipole antennas. If gain antennas

are used, additional separation is required. For example, if both

receive and transmit antennas have 3dB gain each, an additional

6 dB isolation is required. At UHF frequencies, an additional 75 feet

separation is required.

Horizontal Antenna Separation:

VHF Band 275 feet

UHF Band 75 feet

800 MHz Band 40 feet

Vertical Antenna Separation

(tip of one antenna to the base of the other):

VHF Band 23 feet

UHF Band 9.5 feet

800 MHz Band 4 feet

4-2 September 27, 2000 68P81093C75-O

Gain antennas do not effect the transmit-to-receive antenna

separation required. Gain antennas are longer than unity gain

antennas.Therefore additional tower height will be required to

maintain the tip-to-base separation.

The antenna isolation distances shown above are based upon ideal

conditions. The antenna-to-antenna coupling is affected by nearby

objects that may result in increased separation required for proper

operation.The antenna coax cable must be a double-shielded type to

minimize cable-to-cable coupling. If RG58 style cables have to be

used, keep the cables as far apart as possible to minimize cable

coupling.

External Duplexer

Operation The PDR 3500 must be used with an external duplexer when

frequency spacing is less than 3 MHz. The duplexer isolation

required for proper operation is approximately 60 dB. Double-

shielded coaxial cables must be used from the repeater to the

duplexer.

Repeater RA or Cross

Band Repeater

Operation

The PDR 3500 can be conﬁgured for Repeater RA or cross band

repeater operation by adding the wireline card and the Astro modem

to the each repeater. The repeaters are connected together using the

wireline port on each repeater. The cables are terminated in RJ-45

connectors.

Repeater 1 Repeater 2

Wireline A Wireline A

Wireline B Wireline B

68P81093C75-O September 27, 2000 5-1

Models and Speciﬁcations 5

Model Chart

Table 2: Model Structure

Model Description

P2066A 132-154 MHz

P2067A 150-174 MHz

P2068A 403-433 MHz

P2069A 438-470 MHz

P2070A 470-494 MHz

P2071A 494-512 MHz

Kit Description

XPLD1177_ Receiver VHF R1

XPLD1178_ Exciter VHF R2

XPLD1179_ Receiver VHF R2

XPLD1180_ Exciter VHF R2

XPLE1254 Receiver UHF R1

XPLE1255 Exciter UHF R1

XPLE1256 Receiver UHF R2

XPLE1257 Exciter UHF R2

XPLE1258 Receiver UHF R3

XPLE1259 Exciter UHF R3

XPLE1260 Receiver UHF R4

XPLE1261 Exciter UHF R4

XXXXXXPLN1682_ Board, Control

XXXXXXPLN1681_ Chassis, main

XXXXXXPLN7776_ Case, portable

XXXXXXPLN7777_ Board, backplane

XXXXXXPPN6026_ Power supply

X X PLD7981_ PA, VHF

XPLE9367_ PA, UHF R1

X X PLE9369_ PA, UHF R3

XPLE9372_ PA, UHF R4

X X PFD6060_ Duplexer, VHF

XXXXPFE6060A Duplexer, UHF

XXXXXXPAN6003A Antenna, mag mount

XXXXXXPDR7778A Label

XXXXXXPBN6048A Packing

x = Indicates one of each is required.

5 -2 September 27, 2000 68P81093C75-O

Maintenance

Speciﬁcations The following are the PDR 3500 speciﬁcations for analog as

measured per the revised EIA/TIA 603 Standards and for digital as

measured per TIA TSB-102.CAAB:

Table 3: Options

OPTION DESIGNATOR DESCRIPTION PURPOSE

Q245AL Add: Duplexer, VHF Adds VHF duplexer. Requires customer frequency.

Q245AM Add: Duplexer, UHF Adds UHF duplexer. Requires customer frequency.

H338AC Add: Transit Case Adds a transit case for increased protection during transport.

Table 4: Speciﬁcations

GENERAL VHF UHF

Standard model numbers P2066A, P2067A P2068A, P2069A, P2070A, P2071A

Channel spacing 12.5, 25, 30 kHz 12.5, 25 kHz

Stability 0.0001% 0.0001%

Preselector bandwidth (3dB) 7 MHz 7 MHz

Squelch Carrier, PL, DPL Carrier, PL, DPL

Number of modes 1 1

TRANSMITTER VHF UHF

RF power (without duplexer) 30 watts 30 watts

RF power (with duplexer) 20 watts 20 watts

Maximum transmit duty cycle 50% 50%

TX spurs/harmonics -60 dB -60 dB

FM noise (EIA) -45 dB nominal -45 dB nominal

Audio response per EIA per EIA

TX distortion (1 kHz, clear audio) <5% <5%

RECEIVER VHF UHF

Sensitivity (20dBQ) 0.35 uV 0.5 uV

Sensitivity (12dB SINAD) 0.25 uV 0.35 uV

Selectivity (EIA SINAD) 85 dB (25/30 kHz) 85 dB (25 kHz)

75 dB (12.5 kHz) 75 dB (12.5 kHz)

Intermod (EIA SINAD) 80 dB (25/30 kHz)

75 dB (12.5 kHz) 75 dB

Spurious and image 80 dB 80 dB

Note: Speciﬁcations are subject to change without notice.

68P81093C75-O August 18, 2000 5-3

Table 5: Speciﬁcations, continued

DUPLEXER

Repeat frequency spread, TX/TX: 300 kHz

VHF minimum duplexer T-R separation 3 MHz: 132-174 MHz

UHF minimum duplexer T-R separation 3 MHz: 403-520 MHz

AC power voltage range: 80-265 Vac

AC power frequency input: 49-61 Hz

External DC power: 11-16 Vdc

CURRENT DRAIN

High power repeat: 10.0 A

Standby: 1.9 A

DIMENSIONS

Size (English): 20.00 x 15 x 7.75 inches

Size (metric): 508 X 381 X 197 mm

WEIGHT

Weight (English): 41 lbs

Weight (metric): 18.6 kg

Note: Speciﬁcations are subject to change without notice.

5-4 September 27, 2000 68P81093C75-O

Notes

68P81093C75-O September 27, 2000 6-1

Approved Accessories 6

General The following accessories are recommended by Motorola for use

with the PDR 3500 Portable Repeater.

Antenna One of the following antennas should be used:

•The magnetic-mount whip antenna (Motorola part number

PAN6003A) shipped with the PDR 3500.

NOTE: This antenna should be cut to frequency before use per the

manufacturer’s instructions enclosed with the antenna.

•An aftermarket antenna which meets these requirements:

-Monopole

-Unity gain

-Tuned to the frequency at which the antenna is to be used

-Minimum input power rating of 60W continuous

-VSWR of 1.5:1 or less

Running H/F 6-# September 27, 2000 68P81093C75-O

Notes

68P81093C75-O September 27, 2000 7-1

Setup and Connections 7

Programming with

RSS

Introduction The PDR 3500 uses the same RSS (Radio Service Software) as the

Quantar/Quantro family. Some values shown in RSS screens may

not be valid due to hardware differences between the Quantar

Station and the PDR 3500. A thorough explanation of the

differences will be given in the following sections.

Connecting PC to

PDR 3500 RSS Port Once the RSS Program has been loaded onto the PC (refer to

Quantar RSS User’s Guide, 68P81085E35), the PC must be

electrically connected to the PDR 3500 via the RSS port located on

the top panel. For this connection, a 9-pin female to 9-pin male EIA-

232 cable is available (Motorola part number 30-80369E31) from

the Accessories and Aftermarket Product Division (AAD, formerly

known as Motorola National Parts). A cable can also be made using

the wiring diagram in Figure 1.

Figure 1. EIA-232 Wiring Diagram

9-Pin

D-Type

EIA-232 Female

TXD

RXD

GND

RTS

CTS

9-Pin

D-Type

EIA-232 Male

TXD

RXD

GND

RTS

CTS

Connects

to COM Port

on PC

Connects

to RSS Port

on Top Panel

MAEPF-27075-O

7-2 September 27, 2000 68P81093C75-O

Connect one end of the cable to COM1 on the PC and the other end

to the 9-pin connector labeled “RSS” on the top panel of the

PDR 3500.

Using the RSS For information on starting the RSS, conﬁguring screen colors,

setting up the PC serial port, and general RSS use, refer to the

Quantar RSS User’s Guide (68P81085E35).

Hardware Conﬁguration From the Main Menu, press “F2-Service.” Press F2 again to arrive at

the Hardware Conﬁguration Screen.

1. The ﬁrst ﬁeld to verify is the Hardware Platform ﬁeld. The

PDR 3500 is designed using the Quantar proﬁle; it will not

operate properly in any other mode.

2. The next ﬁeld to verify is the System Type ﬁeld. This ﬁeld

should be set to “Conventional.” The PDR 3500 does not operate

as an ASTRO-TAC Receiver or DBS Base Station.

3. Next verify that the Rx Freq Band 1 and Tx Freq Band ﬁelds

list the correct ranges for receiver and transmitter.

NOTE: Rx Freq Band 2 should be set to “NONE.”

4. The PA Power Rating ﬁeld should be set to 25W (low power),

and the Power Supply ﬁeld should show “AC LOW.” The

PDR 3500 was designed using a Quantar low power station

proﬁle. It will not operate properly using any other

conﬁguration.

5. If the unit is equipped with a Wireline Card, verify that the

Wireline ﬁeld under the options is set to 4-wire.

Once the Hardware Conﬁguration Screen matches the installed

station hardware, press F8 to validate the conﬁguration. A popup

message will notify the user of any errors in the conﬁguration. For

a complete description of the Hardware Conﬁguration ﬁelds,

please refer to the Quantar RSS User’s Guide (68P81085E35).

Alignment From the Main Menu, press “F2-Service.” Now press “F3” to arrive

at the Alignment Menu. From this menu, the user may align the RF

Power Out, RSSI, Station Squelch, and BER.

For instructions on performing Rx or Tx Wireline Alignment, please

refer to the Quantar RSS User’s Guide (68P81085E35).

NOTE: Before performing any alignment procedures, ﬁrst

dekey the station and “Access Disable” the repeater

as shown in step 1 below.

68P81093C75-O September 27, 2000 7-3

1. Access Disable:

1. From the main menu, press “F2-Service.”

2. Press “F6-Status Panel/Software Ver/Set Date and Time.”

3. Press F2 to arrive at the Status Panel Display Screen.

4. From this screen, press F6 to activate the Access Disable

function. In this mode, the station will not keyup in

response to a received signal. To deactivate the Access

Disable function, press shift+F6.

2. RSSI Calibrate:

1. In the Alignment Menu Screen, tab over to the RSSI

Calibrate ﬁeld, and press F2 to perform the alignment.

2. Using an R2670 or equivalent Communications System

Analyzer, connect the RF out from the Analyzer to the Rx

UHF-type connector on the station top panel.

3. Set the RF output level from the Analyzer to –90 dBm with

no modulation, and set the frequency to PDR 3500 receive

frequency.

4. With the Analyzer RF turned on, make sure the value shown

in the RSS screen is –90 dBm. If it is not, type in “–90

dBm.”

5. Press F8 to save the calibration.

3. Power Out:

1. In the Alignment Menu Screen, tab over to the Tx Power

ﬁeld and press F2 to perform the alignment.

2. For this procedure, connect the Tx UHF-type connector on

the station top panel to the RF input of either a Motorola

R-2670 Communications Analyzer, or to the input of an RF

power meter.

3. Press F6 to keyup the station, check the output power level

shown on the R2670 or RF power meter, and press F9 to

dekey the station.

4. Enter the power from the meter in the ﬁeld shown in the

RSS, then hit F7 for the PDR 3500 to adjust the PA power

output level.

5. Once the unit adjusts the power, again keyup the station,

read the RF power from the meter, dekey the station, enter

the level in the RSS ﬁeld, and hit F7 again to adjust.

6. Repeat this cycle until the power out is as close to 25 Watts

as possible. If the power output will not adjust properly, hit

F4 to initialize the PA and restart the alignment procedure.

7-4 September 27, 2000 68P81093C75-O

7. Once the power out is aligned, press F8 to save the settings

to the station codeplug.

4. Squelch:

1. From the Alignment Menu, tab over to the Squelch Adjust

ﬁeld and press F2 to perform the alignment. The Squelch

control bar is shown in the center of the screen.

2. To open the squelch completely, press F2. To close the

squelch completely, press F4. To adjust the squelch

between fully open and fully closed, use the Pg Up/Pg Dn

keys on the PC.

3. Once the squelch is set, press F8 to save the setting to the

station codeplug.

5. ASTRO Bit Error Report:

1. From the Alignment Menu, tab over to the V.52 Rx BER and

RSSI Report, or PROJECT 25 Rx BER and RSSI Report.

2. Connect the R2670 Communications System Analyzer RF

“OUT” port to the Rx UHF-type connector on the station

top panel.

3. Set the generate frequency to the PDR 3500 receive

frequency, and the output level to –113 dBm, with

modulation either V.52 or Project 25 1011 Pattern

generation.

4. Press F2 to perform the alignment. The values for the report

will appear on the RSS screen.

Channel Information From the Main Menu, press F4. Press F4 again to arrive at the

Channel Information Screen. From this screen, the user may

conﬁgure the TX/RX frequencies, RF power out, modulation type,

and the various channel traits for up to 16 channels.

1. In this screen, ﬁrst set the Rx1 and Tx frequency to the proper

values.

NOTE: The Rx2 frequency is set to 0.00000 MHz and cannot

be edited. This is because the PDR 3500 does not

allow for 2 receivers. The station will automatically

calculate the Tx Idle Frequency to be the same as the

Tx Frequency.

In most applications, the Tx Idle Frequency should remain the same

as the Tx Frequency. However, in case of portable or mobile radios

unsquelching near the PDR 3500, adjust the Tx Idle frequency to Tx

Frequency -6.25 kHz.

2. Set the modulation type to either Analog, ASTRO, ASTRO CAI,

68P81093C75-O September 27, 2000 7-5

Analog/ASTRO CAI, or CAI RX WIDE DEV.

3. Move to page 2 of the Channel Information Screen by pressing

the Pg Dn key. Set the Tx Power Out to the desired power level.

(The Battery Backup ﬁeld has no effect on station operation

since there is no battery option for the PDR 3500.)

For a more complete description of the Channel Information ﬁelds,

please refer to the Quantar RSS User’s Guide.

Electrical

Connections

Power Supply

Connections •AC Input Power Connection

Each PDR 3500 is shipped with an eight foot, 3-conductor line

cord. Attach the receptacle end of the cord to the AC input plug

located on the station top panel. Plug the 3-prong plug into a 110

V or 220 V AC grounded outlet.

NOTE: The Power Supply module automatically selects

between 110 V and 220 V.

•DC Input Power Connection

An optional six foot, fused 2-conductor DC power cord is

available. Attach the alligator clip leads (Red “+”, Black “-”) to

an external battery or some other DC source set to +12 V. Plug

the molded connector end to the external DC connector on the

top panel.

NOTE: The top panel external DC connector will not charge

an external battery.

RF Cabling

Connections

Introduction The transmit and receive antenna RF connections may be made in

one of two fashions depending on the system application.

•Separate TX and RX antennas.

The PDR 3500 top panel has two UHF-type connectors: one for

RX, and one for TX. In this conﬁguration there is a separate

antenna for each connector.

•Duplexer

7-6 September 27, 2000 68P81093C75-O

Using this conﬁguration, only one antenna is required for both

transmit and receive. The duplexer is mounted to the station top

panel and has a single N-type connector for the antenna. An N-to-

UHF adapter is provided.

Separate RX and TX

Connectors In order to use two antennas, ﬁrst disconnect the duplexer (if

equipped). Connect the Rx antenna to the UHF connector labeled

“RX” on the top panel, and the Tx antenna to the UHF connector

labeled “TX” (Figure 2). Please refer to the Antenna Spacing Chart

on page 4-1 in this manual.

Duplexer The duplexer allows the PDR 3500 to use a single antenna for both

transmit and receive.

1. Connect the UHF connector labeled “RX” on the station top

panel, to the N-type connector labeled “RX” on the duplexer.

2. Connect the top panel UHF connector, labeled “TX,” to the N-

type connector labeled “TX” on the duplexer .

3. Connect the antenna UHF-type connector to the connector

labeled “ANT” on the duplexer.

68P81093C75-O September 27, 2000 8-1

Operation 8

Description This section describes the switches, pushbuttons, connectors, and

LED indicators on the PDR 3500 station used during local operation

of the station and servicing.

Summary of Switches,

Pushbuttons, and

Connectors

The following switches, pushbuttons, and connectors allow the

station to be operated or serviced locally. See Figure 2 for the

location and function of these controls and connectors.

Summary of LED

Indicators NOTE: Refer to the Troubleshooting section of this manual

for the detailed descriptions and interpretation of the

LED indicators.

The following LED indicators are provided to show the operating

status of the station. See Figure 2 for the location of these indicators.

Table 6 Switches, Pushbuttons, and Connectors

Top Panel

Wireline connectors Transmit UHF connector

RSS port connector Receive UHF connector

DC connector

AC connector

Momentary PTT/Reset switch

Table 7 Summary of LED Indicators

Top Panel Station Control Module

Power/Transmit LED Station On

Station Fail

Intcm/Acc D

Control Ch

Rx 1 Active

Rx2 Active

Rx Fail

Aux LED

8-2 September 27, 2000 68P81093C75-O

Figure 2 . Switches , Pushbuttons , Connectors, and LED Indicators for PDR 3500

Table 8 Switches, Pushbuttons, and LED Indicators

Item Name Purpose

A EIA-232 RSS Port Connector Used to connect an IBM® PC (or compatible PC), running

RSS software. Performs station alignment, optimization,

and diagnostics. Requires Null Modem Cable (Motorola part

number 30-80369E31).

B DC Connector External DC source (+12 Vdc)

C AC Connector and Fuses AC Inlet (110/220 Vac, 3 A)

D Power/Transmit LED The function of this LED indicator is described in the Trou-

bleshooting section of this manual.

E Momentary PTT/Reset Switch When set to “PTT,” its purpose is to test the station. When

set to “RESET,” its purpose is to reset the station.

F Control Module Status LEDs The function of these LED indicators is described in the

Troubleshooting section of this manual.

The LED indicators are (from right to left): Station On; Sta-

tion Fail; Intcm/Acc D; Control Ch; Rx 1 Active; Rx2 Active;

Rx Fail; Aux LED.

Duplexer Wireline

Connections

(RJ-45)

Antenna Transmit

UHF Jack

Receive

UHF Jack

MAEPF-27065-O

68P81093C75-O September 27, 2000 9-1

Troubleshooting 9

Introduction This section provides troubleshooting recommendations and

procedures for the PDR 3500 station and associated ancillary

equipment.

Troubleshooting

Overview The troubleshooting procedures and supporting diagrams allow the

service technician to isolate station faults to the module/assembly

level, or to a limited portion of the motherboard circuitry.

The following information is included:

•Alarm indicators and their functions

•Troubleshooting ﬂow charts

•Module replacement procedures

•Post-repair procedures: Performing alignment

after replacing defective modules

Recommended Test

Equipment Follow this list of recommended test equipment when performing

troubleshooting procedures on the PDR 3500 station and ancillary

equipment:

Test Equipment List •Motorola R2001 or R2600 Series

Communications Analyzer (or equivalent)

•PC with RSS program

•In-Line Wattmeter (Motorola S-1350, or

equivalent)

•Dummy Load (50Ω, station wattage or higher)

•Handset/Microphone with PTT switch

(TMN6164, or equivalent)

Troubleshooting

Procedures The troubleshooting and repair philosophy employs Field

Replaceable Unit (FRU) substitution. The PDR 3500 station is

comprised of self-contained modules (FRUs). Replacing faulty

modules should bring the station back to normal operation.

9-2 September 27, 2000 68P81093C75-O

Many of the troubleshooting procedures require the use of the

Motorola-supplied Radio Service Software (RSS) since the PDR

3500 station is computer-controlled, employing state-of-the-art

signal processing. The RSS operates on a PC (or compatible), with

RS-232 communication port capability. The RSS allows the

technician to access alarm logs, run diagnostics, and set up the

equipment for various audio and RF tests. Complete details on the

operation of the RSS are provided in the RSS User’s Guide (manual

number 68P81085E35).

Troubleshooting

Overview

Introduction Two procedures are provided for troubleshooting the PDR 3500

station and ancillary equipment. Each procedure is designed to

quickly identify faulty modules, and replace them with known

working modules.

Procedure 1: Routine

Maintenance Functional

Checkout

Procedure 1 is a series of non-intrusive tests, performed during a

routine maintenance. The technician veriﬁes proper station

operation. An overview of the procedure is shown in the ﬂowchart

(Figure 3).

Procedure 2:

Troubleshooting A

Reported/Suspected

Problem

Procedure 2 should be used when an equipment problem has been

either reported or is suspected. The procedure includes tests that

allow the technician to troubleshoot reported or suspected

equipment malfunctions. An overview of the procedure is shown in

the ﬂow chart (Figure 4).

How to Use These

Troubleshooting

Procedures

Perform the following basic steps in order to efﬁciently troubleshoot

the PDR 3500 station equipment.

Step 1. Select the appropriate troubleshooting procedure ﬂow

chart (Procedure 1 or Procedure 2).

Step 2. Perform the selected ﬂow chart tasks. Tasks requiring

additional explanation are marked with page

references.

•Locate the additional information

•Perform the tasks (if any)

•Return to the ﬂow chart

Step 3. Once the faulty module has been identiﬁed, proceed to

Module Replacement Procedures, beginning on

page 25.

68P81093C75-O September 27, 2000 9-3

Figure 3 PDR 3500 Station Troubleshooting Overview (Procedure 1: Routine Maintenance)

ROUTINE

MAINTENCE VISIT

OBSERVE LED INDICATORS and

MONITOR ALARM TONES (PAGES 6 AND 9)

• OBSERVE LED INDICATORS ON STATION

MODULE FRONT PANELS

• MONITOR ALARM ALERT TONES FROM

EXTERNAL SPEAKER

OF BEING

FAULTY?

MODULE

SUSPECTED GO TO TROUBLESHOOTING

PROCEDURE 2 FLOW CHART

YES

INTERPRET STATUS REPORT

(RSS USER’S GUIDE–68P81085E35)

• USING RSS, ACCESS THE STATUS REPORT

SCREEN AND LOOK AT HISTORY OF ALARMS

AND TIME STAMPS

GO TO TROUBLESHOOTING

PROCEDURE 2 FLOW CHART

YES

RUN STATION DIAGNOSTICS

(RSS USER’S GUIDE–68P81085E35)

• USING RSS, RUN DIAGNOSTICS ON

STATION MODULES

GO TO TROUBLESHOOTING

PROCEDURE 2 FLOW CHART

YES

DONE

PROCEDURE 1

OF BEING

FAULTY?

MODULE

SUSPECTED

OF BEING

FAULTY?

MODULE

SUSPECTED

9-4 September 27, 2000 68P81093C75-O

Figure 4 PDR 3500 Station Troubleshooting Overview (Procedure 2: Reported or Suspected Problem)

PROBLEM

REPORTED OR SUSPECTED

OBSERVE LED INDICATORS and

MONITOR ALARM TONES (PAGES 6 AND 9)

• OBSERVE LED INDICATORS ON STATION

MODULE FRONT PANELS

• MONITOR ALARM ALERT TONES FROM

EXTERNAL SPEAKER

IN SOFTWARE

DOWNLOAD MODE?

LED PATTERN

INDICATES STATION YES

YES

RUN STATION DIAGNOSTICS

(RSS USER’S GUIDE–68P81085E35)

• USING RSS, ACCESS DIAGNOSTICS SCREEN,

RUN DIAGNOSTICS, AND INTERPRET RESULTS

YES

PROCEDURE 2

USING RSS, ACCESS THE STATUS

REPORT SCREEN. ANALYZE

MESSAGES TO DETERMINE IF

MODULE FAILURE HAS OCCURRED.

USING RSS, DOWNLOAD STATION

SOFTWARE TO FLASH MEMORY

ON STATION CONTROL BOARD

YES

OF BEING

FAULTY?

MODULE

SUSPECTED

OF BEING

FAULTY?

MODULE

SUSPECTED

OF BEING

FAULTY?

MODULE

SUSPECTED

GO TO

GO TO MODULE REPLACEMENT

PROCEDURES ON page 25

GO TO MODULE REPLACEMENT

PROCEDURES ON page 25

68P81093C75-O September 27, 2000 9-5

Figure 4 PDR 3500 Station Troubleshooting Overview (Procedure 2: Reported or Suspected Problem) (Continued)

CHECK CODE PLUG PROGRAMMING

(RSS USER’S GUIDE – 68P81085E35)

• USING RSS, READ THE STATION CODE PLUG

AND VERIFY THAT PROGRAMMING IS

YES

RUN TRANSMITTER AND RECEIVER TESTS:

• PERFORM VERIFYING TRANSMITTER CIRCUITRY

TESTS (Page 10) TO ISOLATE PROBLEM TO

PROCEDURE 2

YES

OF BEING

FAULTY?

MODULE

SUSPECTED

(CONTINUED)

CORRECT (COMPARE TO CODE PLUG FILE ON

PC FOR PARTICULAR STATION)

CODE

PLUG

PROGRAMMING

CORRECT?

• RE-PROGRAM STATION CODE PLUG BY DOWNLOADING

CUSTOMER DATA FROM CODE PLUG FILE FOR

PARTICULAR STATION (RSS GUIDE – 68P81085E35)

• IF PROBLEM STILL EXISTS, PROCEED TO INTERPRET

STATUS REPORT

INTERPRET STATUS REPORT

(RSS USER’S GUIDE–68P81085E35)

• USING RSS, ACCESS THE STATUS REPORT

SCREEN AND LOOK AT HISTORY OF ALARMS

AND TIME STAMPS

TRANSMITER CIRCUITRY

• PERFORM VERIFYING RECEIVER CIRCUITRY TESTS

(Page 14) TO ISOLATE PROBLEM TO RECEIVER

CIRCUITRY

GO TO MODULE REPLACEMENT

PROCEDURES ON page 25

REPLACE FAULTY MODULE AS

DESCRIBED IN MODULE RELACEMENT

PROCEDURES BEGINNING ON page 25

9-6 September 27, 2000 68P81093C75-O

Interpreting LED

Indicators Several LED indicators are provided on the front panels and on the

top panel of the chassis. These LEDs give a quick status indication

of the station equipment. The Station Control Module LEDs are

visible from the station’s top panel. Observing the other LEDs

requires the removal of the station’s chassis from the case. See

Figure 5 for the location of all LED indicators on the station’s

equipment. A listing of each LED indicator, along with a description

of the status indicated by each LED, is shown in Table 9.

Table 9: PDR 3500 Station LED Indicator Functions

LED Location LED Name Status Deﬁnition

EXCITER MODULE

Tx Lock – GREEN when Exciter synthesizer is locked; module fully functional.

– OFF when:

synthesizer is out of lock

+5V, +14.2V, or both are absent

PA Full – GREEN when transmitter is keyed and PA output power is at expected

power level (as set by technician via RSS during station alignment)

– OFF when:

PA not keyed

PA keyed, but PA output power is not at expected power level

(as set by technician via RSS during station alignment)

PA Low – YELLOW when transmitter is keyed and PA output power is less than

expected power level (as set by technician via RSS during station alignment) but

not shut down (for example, during power cutback mode)

– OFF when:

PA not keyed

PA keyed, and PA output power is at expected power level

(as set by technician via RSS during station alignment)

PA Fail – RED when:

No PA output power (for example, during PA shutdown mode);

LED status is latched, thereby indicating status during current key or

for previous key

NOTE: Any component associated with the PA could cause LED to light.

These include the Exciter, PA, and transmitter circuitry on the backplane.

– FLASHING when PA is in the Test Mode (activated by technician via

RSS; when in Test Mode, power cutback, and open

power loop protection are disabled)

– OFF when PA output power is either at expected level, or at speciﬁc

cutback levels (any level other than shutdown); LED status is latched,

thereby indicating status during current key, or for previous key.

TOP PANEL Pwr/Tx – GREEN when AC or DC input power is present

– RED when station is transmitting

– OFF when AC or DC input power is absent

68P81093C75-O September 27, 2000 9-7

STATION CONTROL

MODULE (SCM)

STATION ON – GREEN when SCM fully functional

– FLASHING when front panel switch press detected

– OFF for SCM failure

Station Fail – RED for SCM failure

– OFF when SCM fully functional (no failure)

Intcm/Acc D –YELLOW when station is in Intercom mode

– FLASHING when station is in Access Disable mode

– OFF when station is not in Intercom mode

Control Ch – GREEN when station is control channel (trunking systems only)

– FLASHES each time station decodes IWS (IntelliRepeater systems only)

Rx 1 Active – GREEN when Station Control Board is passing audio/data (receive path unmuted)

from Receiver #1; The following conditions must be met:

Carrier at proper frequency being received

Carrier signal level is above threshold set in codeplug

Squelch criteria met (carrier, PL, DPL,ASTRO, secure, etc.)

(Note that squelch criteria can be manually altered via RSS for

testing purposes)

– OFF when above conditions are not met for Receiver #1

Rx 2 Active – Unused in PDR 3500

Rx Fail – RED when receiver is non-functional*

– BLINKING ONCE PER SECOND when Receiver #1 is non-functional*

– BLINKING TWICE PER SECOND when Receiver #2 is non-functional* or when

SAM module, or UHSO Module, is non-functional (unused in PDR 3500)

– OFF when RECEIVER is functional* (or no receiver module installed)

*A receive module is considered non-functional if a failure is detected during

diagnostics run at time of power-up, or during normal operation

Aux LED – GREEN LED available for special application function

All LEDs

Flashing On

and Off in

Unison

– Station is in Software download mode, either initiated by the RSS, or due to

software failure.

LEDs

Flashing Up

and Down in

Sequential

Pattern

– Station received software ﬁles from RSS and is in process of downloading the

software to FLASH memory in the Station Control Module

WIRELINE

INTERFACE BOARD

(WIB)

WL On – GREEN when WIB fully functional

– OFF for WIB failure

Both LEDs

Blinking

Rapidly

– WIB is in Software Download mode (operating software is being downloaded into

the FLASH memory on WIB from Station Control Module)

Notes:

1. All LEDs momentarily light following station reset (Volume Up, Volume Down, and Intercom buttons on SCM front panel

pressed simultaneously), or on station power-up.

2. If no LED indicators are on, make sure that AC or DC power to the station power supply is present. If using AC power, check top

panel fuses. Check the circuit breaker at the source. Check the AC or DC line cord. If no problem is found and AC power is used,

suspect the power supply.

Table 9: PDR 3500 Station LED Indicator Functions (Continued)

LED Location LED Name Status Deﬁnition

9-8 September 27, 2000 68P81093C75-O

68P81093C75-O September 27, 2000 9-9

Figure 5 PDR 3500 LED Indicators and Front Panel Buttons and Connectors

Tx Lock

PA Full

PA Low

PA Fail

WL On

WL Fail

Station On

Station Fail

Intrem/AccD

Control Ch

Rx 1 Active

Rx 2 Active

Rx Fail

Aux LED

Speaker

RSS Port

Intercom/Shift

CSQ/PL/Off

Vol Up/Local PTT

Vol Down/

Access Disable

EXCITER MODULE

(Front Panel)

WIRELINE INTERFACE

MODULE

(Front Panel)

STATION CONTROL MODULE

(Front Panel - Cover Plate Removed)

PWR/Tx

PTT/Reset

Switch

TOP PANEL

OF STATION

MAEPF-27030-O

Handset

9-10 September 27, 2000 68P81093C75-O

Interpreting Alarm

Alert Tones

Introduction Four station alarm conditions are reported with audio alert tones

which are routed to the external speaker connector (RJ-11) on the

front of the control module. (Pin 4 on the RJ-11 is Speaker High; Pin

1 is Speaker Ground.) The alarms are also entered into the alarm log

which can be accessed using the RSS. Refer to the RSS User’s

Guide, part number 68P81085E35.

NOTE: The alarm tones may also be routed to the console

(via the wireline) and transmitted over the air. Refer

to the RSS User’s Guide (part number 68P81085E35)

for details on enabling or disabling these two alarm

routing options.

The four alarm conditions are represented by a series of alarm tones,

from a single beep, to four beeps. Each beep is a 1200 Hz tone,

lasting 125 msec. The alarm tones occur during a repeating 10

second window, with two seconds between successive alarms (when

more than one alarm is active). The following two examples

illustrate the timing of the alarm tones.

The alarm tone deﬁnitions are as follows:

Example 1: Single Alarm (#3)

beep...beep....beep.................................................................................................[repeats]

Alarm #3

10 Second Window

Example 2: Multiple Alarms (#1 and #4)

beep...........................beep....beep ... beep....beep................................................[repeats]

2 seconds

Alarm #1 Alarm #4

10 Second Window

Number of

Beeps Alarm Condition

Name Alarm Condition Description

1 Battery Revert Alarm is reported when station loses AC/DC line power and

reverts to battery backup. Alarm is cleared when station

receives AC/DC power. Should not occur in PDR 3500.

2 PA Fail Alarm is reported when PA fails to keyup to full ouput power.

Alarm is cleared upon successful keyup to full power.

3 Synthesizer Alarm is reported when either Tx or Rx synthesizers fail to

lock. Alarm is cleared when both sythesizers lock.

4 Overvoltage Alarm is reported when battery charging voltage is above

+34.5 V (100 W stations), or +17.25 V (20 W stations). Alarm

is cleared when voltage returns to normal range.

68P81093C75-O September 27, 2000 9-11

Verifying Transmitter

Circuitry Introduction

While most module faults can be detected by running the station

diagnostics provided by the RSS, the following procedure provides

a more traditional method of troubleshooting the transmitter

circuitry. This procedure is useful in the event that the RSS is not at

hand or for some reason cannot be utilized (PC malfunction, etc.)

This procedure allows the service technician to make minor

adjustments and verify the proper operation of the station transmit

circuitry, including:

•Exciter Module

•Power Ampliﬁer Module

•Power Supply Module

•2.1 MHz Reference Oscillator Circuitry

•Transmitter-related circuitry on the Station

Control Module (SCM)

In general, the transmitter circuitry is exercised by injecting and

measuring signals using a Motorola R2001 Communications

Analyzer (or equivalent). Measured values outside the acceptable

range indicate a faulty module; values within range verify proper

operation of the above listed modules and circuitry.

Required Test Equipment The following test equipment is required to perform the procedure:

•Motorola R2001 Communications Analyzer (or

equivalent)

•Telephone-style handset with PTT switch

(TMN6164, or equivalent)

•In-line Wattmeter (Motorola Model S-1350, or

equivalent)

•Dummy Load (50Ω, station wattage or higher)

Verifying Transmitter

Circuitry Procedure Step 1. Connect test equipment by performing Step 1 through

3 shown in Figure 6.

Step 2. Connect handset to RJ-11 connector on SCM front

panel, as shown. The cover plate over the SCM side of

the chassis must be removed to access this connector.

MEPF-27031-O

Handset

PTT

Button

9-12 September 27, 2000 68P81093C75-O

Figure 6 Test Equipment Setup for Verifying Transmitter Circuitry

RF SECTION

MONITOR

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Disconnect cable from antenna port of

duplexer or antenna relaly. If duplexer

or relay not used, disconnect cable

from top panel transmit output port.

Duplexer or

Antenna Relay

Antenna Port

Antenna

In-line

Wattmeter

Antenna

RF Port Select Knob

(Pull Out)

Motorola

R2001 Communications

Analyzer

Dummy

Load

If duplexer or antenna relay is used,

connect N-to-N cable from antenna

port to in-line wattmeter, otherwise

connect UHF-to-N cable from top

panel transmit jack to in-line wattmeter.

Connect wattmeter to dummy load.

Connect antenna to R2001 antenna input.

Be sure to pull RF Port Select Knob

out to select antenna rf input.

MAEPF-27032-O

68P81093C75-O September 27, 2000 9-13

Step 3. Press the PTT button and observe the LED indicators

on the Exciter Module front panel.

•If PA Low or PA Fail LED is lit, suspect the

following:

-Power Ampliﬁer Module failure

-Exciter Module failure

-Loose or bad Exciter-to-PA RF cable

-DIP switches on backplane are set for incorrect

station frequency band. DIP switches should

be set as described in the backplane portion of

the Module Replacement section.

-Faulty forward voltage, control voltage, or

temperature voltage translation circuitry on

backplane.

•If TX Lock LED is off, suspect the following:

-Faulty Station Control Module

-Faulty Exciter Module

-Faulty backplane

Step 4. Measure output power by pressing the PTT button and

observing the reading on the in-line wattmeter.

•If the PA output is not at the proper power (as set

for the particular station), adjust the output power

as described in the Setup and Connections

section of this manual.

•If the station will not output the rated power, and

the output is being measured through a duplexer or

antenna relay, the duplexer could be set for the

incorrect frequency, or it could be malfunctioning,

or the antenna relay could be faulty. Connect the

wattmeter directly to the transmit port (UHF

connector) on the station top panel, bypassing the

duplexer or antenna relay. If the station generates

rated power directly from the PA, suspect the

following:

-Faulty duplexer or transmit frequency

mismatch

-Loose or faulty PA-to-duplexer/antenna relay

cable

-Improperly connected or faulty antenna relay

9-14 September 27, 2000 68P81093C75-O

If the station still does not generate rated power, suspect the

following:

-Power Ampliﬁer Module failure

-Exciter Module failure

-Loose or faulty Exciter-to-PA RF cable

-Faulty forward voltage or control voltage

translation circuitry on backplane

Step 5. If the PA power out is okay, setup R2001 for

spectrum analyzer display. Press the PTT

button and observe the display. The display

should look similar to:

•If the display shows multiple carriers, evenly

spaced about the station transmit frequency,

suspect a faulty PA module.

•If the display shows a solid carrier, but off

frequency, suspect the following:

-Faulty Exciter or Station Control Module

•If the display shows a single carrier moving

erratically, suspect the following:

-Faulty Station Control Module

-Faulty Exciter Module

-Faulty PA Module

Step 6. If the display is okay, setup R2001 to display

modulation. Using the handset, push the PTT

button and speak into the mouthpiece. Verify

that the display shows:

•If the proper display is not obtained, suspect faulty

SCM or Exciter Module

Step 7. Set the R2001 for GEN/MON MTR. Press the PTT

button and speak loudly into the mouthpiece to cause

maximum deviation. Display should read ±5 kHz

maximum.

•If the proper display is not obtained, suspect faulty

SCM or Exciter Module

Step 8. This completes the Verifying Transmitter Circuitry

test procedure. If all displays and measurements are

correct, the transmitter circuitry may be considered to

be operating properly.

68P81093C75-O September 27, 2000 9-15

•Remove test equipment.

•Restore the station to normal service.

•Return to the trouble shooting ﬂow chart to resume

the troubleshooting sequence.

Verifying Receiver

Circuitry Introduction

While most module faults can be detected by running the station

diagnostics provided by the RSS, the following procedure provides

a more traditional method of troubleshooting the receiver circuitry.

This procedure is useful in the event that the RSS is not at hand, or,

for some reason, cannot be utilized (PC malfunction, etc.)

This procedure allows the service technician to make minor

adjustments and verify the proper operation of the station receive

circuitry, including:

•Receiver Module

•Power Supply Module

•2.1 MHz Reference Oscillator Circuitry

•Receiver-related circuitry in the Station Control

Module (SCM)

In general, the receiver circuitry is exercised by injecting and

measuring signals using a Motorola R2001 Communications

Analyzer (or equivalent). Measured values outside the acceptable

range indicate a faulty module; values within range verify proper

operation of the above listed modules and circuitry.

Required Test Equipment The following test equipment is required to perform the procedure:

•Motorola R2001 Communications Analyzer (or

equivalent)

•Telephone-style handset with PTT switch

(TMN6164, or equivalent)

•RJ-11 to BNC cable

•Dummy Load (50Ω, station wattage, or higher)

IMPORTANT! If the station operates as a repeater, the transmit output from

the station must be connected to a dummy load to prevent over-

the-air broadcast during receiver testing.

9-16 September 27, 2000 68P81093C75-O

Verifying Receiver

Circuitry Procedure Step 1. Connect test equipment by performing Step 1 through

3 shown in Figure 7.

NOTE: The cover plate over the SCM side of the chassis

must be removed to perform these tests.

Step 2. Disable PL and carrier squelch by repeatedly pressing

the PL/CSQ/Off button until receiver noise is heard

through the handset (or external speaker). Refer to

Figure 5 for the location of the PL/CSQ/Off button. If

no audio is heard, suspect the following:

•Faulty Receiver Module

•Faulty Station Control Module

•R2001 is outputting a carrier signal

Step 3. Set R2001 to generate a 0.5 µV (-13 dBm) FM signal

at the PDR 3500 receiver frequency, modulated by a 1

kHz tone at 3 kHz deviation. The 1 kHz tone should be

audible through the handset (or external speaker). If

no audio is heard, suspect the following:

•Faulty Station Control Module (2.1 MHz

reference)

•Faulty Receiver Module

•Faulty antenna-to-Receiver preselector RF cable

•Faulty R2001-to-station RF cable

•Duplexer/station receive frequency mismatch, or

faulty duplexer

68P81093C75-O September 27, 2000 9-17

Step 4. If audio is heard, connect the HANDSET RJ-11 jack

to the Oscilloscope input BNC connector, as shown

below.

Figure 7 Test Equipment Setup for Verifying Receiver Circuitry

RF SECTION

MONITOR

OSCILLOSCOPE

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Disconnect cables from top

panel transmit and

receive ports.

Antenna

RF In/Out

Motorola

R2001 Communications

Analyzer

Dummy

Load

PDR 3500

Top Panel

Connect UHF-to-N cable from station top panel

receive port to R2001 RF in/out. Connect UHF-to-N

cable from top panel transmit port to dummy load.

Connect handset to RJ-11 jack on

front panel of Station Control Module

(or External Speaker to RJ-11 jack).

MAEPF-27033-O

Handset

PTT

Button

RF SECTION

MONITOR

OSCILLOSCOPE

COMMUNICATIONS

SYSTEM ANALYZER

023

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Oscilloscope

Input

MAEPF-27034-O

Station

Receive

Connector

Station Control

Module

Front Panel

RJ-11 to BNC Test Cable

Motorola Part No. 01-82069W01

(Available from Motorola WASPD)

Volume

Up Button

9-18 September 27, 2000 68P81093C75-O

Step 5. Use the Volume Up button to increase the volume to

maximum. Measure the audio level using the R2001.

•Audio level should measure approximately 0.75 to

1.5 V p-p. If not, suspect faulty SCM.

Step 6. Change R2001 injection signal to

•VHF: 0.25 µV (-119 dBm)

•UHF: 0.35 µV (-116 dBm).

Step 7. Measure the receiver 12 dB SINAD sensitivity. The

value should read 12 dB, or greater. If not, tune the

preselector (VHF and UHF only) and re-check 12 dB

SINAD. If 12 dB SINAD cannot be achieved, suspect

the following:

•Damaged cable from top panel receive port to

preselector

•Faulty receiver

•Excessive loss in the R2001-to-station RF cable

NOTE: To measure 12 dB SINAD, the station must be

programmed for mixed mode Analog/Digital

operation. Incorrect reading will result if

programmed for Digital Only operation.

NOTE: For VHF and UHF stations only, refer to

5. Preselector Field Tuning Procedure in this

section. Procedures for tuning the receiver

preselector are described.

Step 8. If the station is conﬁgured with a duplexer, continue

with Step 9 to test the duplexer’s performance. If the

station is not conﬁgured with a duplexer, go to Step

16.

Step 9. Steps 9 through 13 describe a method of measuring

the effect of insertion loss from the duplexer on

receiver sensitivity. Connect the dummy load to the

station’s top panel receive port through a capacitive

coupler (isolated T). Connect the R2001 to the isolated

side of the coupler. (See Figure 8.)

68P81093C75-O September 27, 2000 9-19

Step 10. Disable the transmitter by holding the Shift button and

then pressing the Access Disable button on the Station

Control Module, as shown in Figure 9. When the

transmitter is disabled, the yellow Access disable light

on the SCM will ﬂash. This step is very important.

With the transmitter disabled, the PA Full LED on the

Exciter Module should not light, even when the station

is receiving.

Figure 8 A. Coupled receiver connection. (Top) B. Coupled duplexer connection. (Bottom)

RXTX

RF SECTION

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Duplexer

PDR 3500

Top Panel

Capacitive

Coupler

(Isolated T)

RF Output

Motorola

R2001 Communications

Analyzer

Dummy

Load

MAEPF-27035-O

RXTX

RF SECTION

MONITOR

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Duplexer

PDR 3500

Top Panel

Capacitive

Coupler

(Isolated T)

RF Output

Motorola

R2001 Communications

Analyzer

Dummy

Load

MAEPF-27036-O

9-20 September 27, 2000 68P81093C75-O

Step 11. Measure the 12dB SINAD sensitivity and make a note

of the level. This level will serve as a baseline for the

receiver sensitivity. If 12 dB SINAD cannot be

achieved, suspect the following:

•Test conﬁguration used does not match that shown

in Figure 8B.

•Excessive loss in the coaxial cables or coupler.

Step 12. Remove the cable connecting the coupler to the top

panel receive port. Connect the coupler to the

duplexer’s antenna port. Connect the duplexer’s

receive port to the station’s top panel receive port, as

in normal station operation. (See Figure 8B.)

Step 13. Measure the 12 dB SINAD once again, and note the

result. The difference between this 12 dB SINAD level

and the level measured in Step 11 reﬂects the insertion

loss of the duplexer. The difference should be no

greater than approximately

•VHF: 1.3 dB

•UHF: 1.6 dB

If the difference is greater, suspect the following:

•Duplexer receive and transmit ports are reversed

•Loose or damaged cables between the duplexer

and the station

•Station receive frequency does not match the

duplexer receive frequency. Use a different

frequency or replace the duplexer. (Field tuning of

duplexers is not recommended.)

Figure 9 Disabling the Transmitter

Press and hold

Shift Button.

Station Control

Module

Exciter

Module

MAEPF-27037-O

Press Vol Down/

Access Disable

Intcm/Acc D LED

should Flash yellow.

PA Full LED should

NOT illuminate.

68P81093C75-O September 27, 2000 9-21

Step 14. Steps 14 and 15 will test the effect of duplexer

quieting on receive sensitivity. Re-enable the

transmitter by holding down the Shift button again

and pressing the Access Disable button on the SCM.

The following lights should indicate that the station is

now operating as a repeater:

•Yellow Access Disable light stops ﬂashing

•PA Full LED on the Exciter Module lights when

the station is receiving.

Step 15. Test the 12 dB SINAD sensitivity. Depending on the

duplexer frequency spacing, this level should be no

more than 1 to 2 dB greater than the Step 13 reading

(with the transmitter disabled). If the reading is greater

than 1 to 2 dB, the station transmit frequency does not

match the duplexer receive frequency. Use a different

frequency or replace the duplexer. (Field tuning of

duplexers is not recommended.)

Step 16. If the station is not digital-capable, the Verifying

Receiver Circuitry test procedure is complete. The

receiver circuitry is considered to be operating

properly if all displays and measurements are correct.

1. Remove the test equipment.

2. Restore the station to normal service.

3. Return to the troubleshooting ﬂow chart to resume

the troubleshooting sequence.

If the station is digital-capable, continue with the

Digital Only portion of the Verifying Receiver

Circuitry test procedure.

Verifying Receiver

Circuitry (Digital-

Capable Stations)

Introduction

While most module faults can be detected by running the station

diagnostics provided by the RSS, the following procedure provides

a more traditional method of troubleshooting the receiver circuitry.

This procedure allows the service technician to make minor

adjustments and verify the proper operation of the station receive

circuitry, including:

•Receiver Module

•Power Supply Module

•2.1 MHz Reference Oscillator Circuitry

•Receiver-related circuitry in the Station Control

Module (SCM)

9-22 September 27, 2000 68P81093C75-O

The transmitter circuitry is exercised by injecting and measuring

signals using a Motorola R2670 Communications Analyzer (or

equivalent), and analyzing the Bit Error Rate using the RSS.

Measured values outside the acceptable range indicate a faulty

module; values within range verify proper operation of the above

modules and circuitry.

Required Test Equipment The following test equipment is required to perform the procedure:

•Motorola R2670 Communications Analyzer with

ASTRO CAI Option (or equivalent)

•PC running Radio Service Software (RSS)

program

•Female N-type to Female N-type coaxial cable

•Dummy Load (50Ω, station wattage, or higher).

Required for repeater stations only.

IMPORTANT! If the station operates as a repeater, the transmit output from

the station must be connected to a dummy load to prevent over-

the-air broadcast during receiver testing.

Step 1. Proceed to ASTRO Bit Error Rate Report (located in

Chapter 4 of the RSS User’s Guide, part number

68P81085E35). Follow the instructions for setting up

the test equipment and initiating a BER report using

the RSS.

Step 2. If the BER reading is above 5%, suspect the

following:

•Faulty Station Control Module (2.1 MHz

reference)

•Faulty Receiver Module

•Faulty antenna-to-receiver preselector RF cable

•Faulty top panel-to-preselector RF cable

•Faulty R2670-to-station RF cable

Step 3. If you are injecting RF directly into the top panel

receiver port, change the R2670 injection signal level

to:

•VHF: 0.25 µV (-119 dBm)

•UHF: 0.35 µV (-116 dBm)

If you are injecting RF through a duplexer, change the

R2670 injection signal level to:

68P81093C75-O September 27, 2000 9-23

•VHF: 0.29 µV (-117.7 dBm)

•UHF: 0.43 µV (-114.4 dBm)

NOTE: For VHF and UHF stations only, refer to

5. Preselector Field Tuning Procedure in this

section, for procedures to tune the receiver

preselector.

Step 4. Note the receiver BER reading. The BER reading

should be 5% or less. If not, and if a duplexer is being

used, repeat the BER test, bypassing the duplexer. If

the BER is 5% or less after bypassing the duplexer, the

station frequencies do not match the duplexer

frequencies, or the duplexer-to-top panel cables are

faulty.

If the BER, as tested straight into the top panel, is

greater than 5%, tune the preselector and re-check the

BER reading. If a reading of 5%, or less, cannot be

achieved, replace the Receiver Module.

Step 5. This completes the Verifying Receiver Circuitry test

procedure. If all displays and measurements are

correct, the receiver circuitry may be considered to be

operating properly.

1. Remove test equipment.

2. Restore the station to normal service.

3. Return to the trouble shooting ﬂow chart to resume

the troubleshooting sequence.

Wiring Diagram Please refer to Figure 10 for a conceptual line drawing of the

motherboard, modules, and other components set ﬂat outside of the

chassis and properly interconnected.

Please refer to Figure 11 on page 25 for a detailed diagram of the

connections from the AC inlet connector to the power supply and

chassis ground.

9-24 September 27, 2000 68P81093C75-O

Figure 10 Interconnect Diagram

Reference From To Description

A Top panel UHF Receiver mini-UHF Receive RF coaxial cable

B Top panel AC connector Power supply terminals H, N, GND 120/240 VAC to power supply

CPower supply terminals POS,

NEG Backplane terminals WHT, BLK 14 VDC from power supply

D Top panel DC connector Backplane terminals BLU, BLK 14 VDC input to station

E Top panel DB-9 connector Backplane connector J20 RSS interface ribbon cable assembly

F Top panel LED/Switch Backplane Molex P5/P9 LED/Switch assembly

G Chassis cooling fans Backplane 3-pin Molex P5 Cooling fan assembly

H Backplane terminals RED,

BLK PA 14 VDC input 14 VDC to PA

I Backplane connector P10 PA Control/feedback ribbon cable

J PA mini-UHF Top panel UHF Transmit RF coaxial cable

K Exciter mini-UHF PA RF drive coaxial cable

AC Jack

Power

Supply

Motherboard

RSS

Receiver Exciter

Fan Fan

SwitchLED

Terminal

Tabs

J20 P10

MAEPF-27080-O

68P81093C75-O September 27, 2000 9-25

Module Replacement

Procedures Station modules suspected of being faulty must be replaced with

modules known to be in good condition in order to restore the station

to proper operation. The following procedures provide instructions

for replacing each of the station modules and performing any

required post-replacement adjustments or programming.

General Replacement

Information

Anti-Static Precaution The station circuitry contains many C-MOS and other static-

sensitive devices. When servicing the equipment, you must take

precautionary steps to prevent damage to the modules from static

discharge. Complete information on prevention of static protection

is provided in Motorola publication number 68P81106E84,

available through the Accessories and Aftermarket Division.

Some additional precautions are as follows:

•A wrist strap (Motorola part number RSX4015A,

or equivalent) should be worn while servicing the

equipment to minimize static buildup.

Figure 11 Chassis Ground Wiring Diagram

Output Input

Gnd

Neg Pos HN

Power Supply

AC Inlet

(Viewed from

Underside)

Chassis

Ground Stud

Ring Lugs

Nuts

Lock

Washers GRN/YEL

GRN/YEL

BROWN

ORANGE

MAEPF-27099-O

WARNING: When wearing a Conductive Wrist Strap, be careful near sources of high voltage.

The good ground provided by the wrist strap will also increase the danger of lethal shock

from accidentally touching high voltage sources.

CAUTION: DO NOT insert or remove station modules with power applied. This may result in

damage to the modules.

9-26 September 27, 2000 68P81093C75-O

•Do not insert or remove modules with power

applied. Always turn off the station by unplugging

the AC and DC cords from the top panel before

inserting or removing modules.

•All spare modules should be kept in a conductive

bag for storage and transporting. When shipping

modules to the repair depot, always pack them in

conductive material.

Care of Gold-Plated

Connector Contacts The connectors between the modules and the station backplane

board are made with gold-plated card edge connector contacts to

provide maximum reliability. Gold-plated materials do not form a

non-conductive oxide layer and therefore should not require

cleaning under normal conditions.

When the modules have been subjected to many extraction/insertion

cycles, or if the station is operated in a dusty environment, the

contacts may require cleaning. Do not use an eraser or any type of

abrasive substance to clean either the module card edge connectors,

or the backplane connector contacts.

If the cleaning of gold-plated contacts is required, use a soft cloth

dampened with alcohol to lightly wipe the contacts. Be sure not to

touch the contact surfaces with your ﬁngers; ﬁnger oils and salts can

contaminate the contact surfaces.

Power Down Station

Before Removing/

Inserting Modules

Before removing or inserting a module into the station chassis and

engaging the backplane connector, be sure to turn off the station

power by unplugging the AC or DC power cord, or both.

Validating Repairs After replacing a faulty module with a module that is known to be in

good condition, perform the following tests to validate the repair.

•If the faulty module was detected as the result of

running station diagnostics via the RSS, run the

diagnostics again after the repair is made to ensure

that the replacement module passes all diagnostic

tests.

•If the faulty module was detected by an

operational failure, perform the operation to

ensure that the repair corrected the reported or

detected failure.

Module Replacement This section discusses the replacement of each of the PDR 3500’s

modules and related requirements and considerations.

68P81093C75-O September 27, 2000 9-27

Station Control Before Removing the Old Station Control Module

A new SCM contains settings in a codeplug (EEPROM). Those

settings can be conﬁgured, using the RSS, after the module has been

installed.

If the old SCM is capable of communicating with the RSS, the old

codeplug can be read from the SCM and saved to disk to be

programmed into the new SCM. This is described in the Setup and

Connections section of this manual, and in the RSS User’s Guide

(68P81085E35).

If the old SCM is incapable of communicating with the RSS, an

archival codeplug (one saved on disk) can be used to program the

new SCM. If an archival codeplug is unavailable, the new codeplug

will have to be manually conﬁgured after installation.

Physical Replacement of

the Station Control

Module

1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the 8 Phillips screws from the edges of the station’s top

panel and lift the chassis out of the case.

3. Remove the cover plate on the left end of the front of the station

by removing two Torx screws from the front of the plate.

Remove the four Phillips screws from the side and bottom

edges of the plate.

4. Pull out the old Control Module by gripping behind its DB-9,

RJ-11, and RJ-45 connectors, distributing pressure equally

among the connectors.

5. Insert the new module. Make sure it is in the cardguides; push it

ﬁrmly into the chassis until it seats into the card-edge

connectors on the backplane. (Do not slam the board against the

backplane or push any harder than necessary to seat the

connectors.)

6. If desired, power up the station while it is still out of the case to

make sure the module is securely in place. If the LEDs do not

light, are dim, or ﬂash rapidly, one or more modules are not

seated properly. Unplug the station before continuing to the

next step.

7. Reassemble the station by reversing steps 2 and 3.

After Installing the New

Station Control Module 1. If the codeplug from the old SCM was saved to disk, or if an

archival codeplug exists on disk, it should be programmed into

the new SCM.

9-28 September 27, 2000 68P81093C75-O

If no preexisting codeplug is available, the new codeplug must

be conﬁgured manually using the RSS. See the Setup and

Connections section of this manual or the RSS User’s Guide

(68P81085E35) for details.

2. Perform the following alignment procedures as described in the

RSS User’s Guide (68P81085E35) or the Setup and

Connections section of this manual, or both.

•Reference Oscillator Calibration

•Squelch Adjust

•Power Output

•Tx Deviation Gain Adjust

•Reference Modulation

•RSSI Calibrate

For Wireline-equipped stations only:

•Tx Wireline

•Rx Wireline

For ASTRO stations only:

•Simulcast/ASTRO Launch Time Offset

For 6809 Trunking stations only:

•TDATA

Wireline

Physical Replacement of

the Wireline Module 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

3. Remove the cover plate on the left end of the front of the station

by removing two Torx screws from the front of the plate.

Remove the four Phillips screws from the side and bottom

edges of the plate.

4. Pull out the old Wireline Module by gripping its front, right

corner (where there are no parts on the board).

5. Set all jumpers on the replacement board to match those on the

faulty board. These include the following:

•Input/ouput impedance matching jumpers

68P81093C75-O September 27, 2000 9-29

•Two-wire/four-wire select jumper

•DC remote control selection jumpers

6. Insert the new module. Make sure it is in the cardguides; push it

ﬁrmly into the chassis until it seats into the card-edge

connectors on the backplane. (Do not slam the board against the

backplane or push any harder than necessary to seat the

connectors.)

7. If desired, power up the station while it is still out of the case to

make sure the module is securely in place. The LEDs on the

Wireline should blink rapidly, indicating that ﬁrmware is

transferring from the SCM to the Wireline Module. When the

blinking stops, the transfer is complete.

If any of the LEDs do not light or are dim, one or more of the

modules are not seated properly. Unplug the station before

continuing to the next step.

8. Reassemble the station by reversing Steps 2 and 3.

After Installing the New

Wireline Module Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35):

•Rx Wireline

•Tx Wireline

ASTRO Modem Card/

V.24 Interface Card

Physical Replacement of

the Card 1. Remove the Wireline Module as described above.

2. Unplug the faulty ASTRO Modem Card or the V.24 Interface

Card from the Wireline board by pressing the mounting posts

through the back of the board.

Install the replacement card by pressing it onto the Wireline board

and locking all mounting posts and connectors.

3. Re-install the Wireline Module as described above.

After Installing the New

Card No alignments or adjustments are required. The card is conﬁgured

by the Station Control Module on power-up.

Receiver

Physical Replacement of

the Receiver Module 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

9-30 September 27, 2000 68P81093C75-O

3. Remove the cover plate on the left end of the front of the station

by removing two Torx screws from the front of the plate.

Remove the four Phillips screws from the side and bottom

edges of the plate. Remove two more Phillips screws from the

bottom of the chassis under the preselector.

4. A coaxial cable runs from the receiver’s preselector, through the

center wall of the chassis, and to the top panel UHF connector.

Disconnect the cable from the preselector and push the loose end

of the cable through the center wall so that it is completely clear

of the receiver.

5. Pull the old receiver out by gripping the tabs protruding past

each end of the preselector.

6. Insert the new module. Make sure it ﬁts under the metal rails

inside the chassis. Push it ﬁrmly into the chassis until it seats

into the card-edge connectors on the backplane. (Do not slam

the board against the backplane or push any harder than

necessary to seat the connectors.)

7. If desired, power up the station while it is still out of the case to

make sure the module is securely in place.

If any of the LEDs do not light, are dim, or ﬂash rapidly, one or

more of the modules are not seated properly.

8. For VHF and UHF stations, tune the preselector using the

procedure in the Maintenance subsection, Preselector Field

Tuning Procedure. Before continuing to the next step, be sure

to unplug the station.

9. Feed the coaxial cable detached in Step 3 back through the

opening in the center wall of the chassis and reconnect it to the

mini-UHF connector on the preselector.

10. Reassemble the station by reversing Steps 2 and 3.

After Installing the New

Receiver Module Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35), or in the RSS section of

this manual, or in both:

•Squelch Adjust

•RSSI Calibrate

Preselector tuning is required for proper performance of the

Receiver Module and it should have been performed when installing

the module, as described under “Physical Replacement of the

Receiver Module.” If the tuning was not performed when the module

was installed, perform it now.

68P81093C75-O September 27, 2000 9-31

Exciter

Frequency Band

Considerations When replacing the Exciter Module, it is important to remember the

frequency-sensitive nature of the Exciter/Power Ampliﬁer

combination. The Exciter and the PA must match according to the

model breakdown table in this manual. If an Exciter with a new

frequency band is being installed, the corresponding PA must be

installed, as described in the Power Ampliﬁer subsection of “Module

Replacement.”

Physical Replacement of

the Exciter Module 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

3. Disconnect the coaxial cable running to a mini-UHF connector

at the front of the Exciter.

4. Tilt the chassis up on its back edge; then, from the bottom of the

chassis, remove the six Phillips screws holding the Exciter’s

mounting plate. Slide the mounting plate out of the front of the

chassis.

5. Pull out the old Exciter Module by gripping behind the mini-

UHF connector and pulling gently.

6. Insert the new module. Make sure it is ﬂat on the bottom of the

chassis. Push it ﬁrmly into the chassis until it seats into the card-

edge connectors on the backplane. (Do not slam the board

against the backplane or push any harder than necessary to seat

the connectors.)

7. If desired, power up the station while it is still out of the case to

make sure the module is securely in place. If the LEDs do not

light, are dim, or ﬂash rapidly, one or more modules are not

seated properly. Unplug the station before continuing to the

next step.

8. Reassemble the station by reversing Steps 2 through 4.

After Installing the New

Exciter Module Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35):

•Tx Deviation Gain Adjust

•Reference Modulation

For ASTRO Simulcast systems only:

•ASTRO/Simulcast Launch Time Offset

9-32 September 27, 2000 68P81093C75-O

Power Ampliﬁer

Frequency Band

Considerations When replacing the Power Ampliﬁer, it is important to remember the

frequency-sensitive nature of the Exciter/Power Ampliﬁer

combination. The Exciter and the PA must match according to the

model breakdown table in this manual. If a PA with a new frequency

band is being installed, the corresponding Exciter must be installed,

as described in the Exciter subsection of “Module Replacement.”

Of equal importance, the PDR 3500 motherboard contains circuitry

which translates between the Exciter from the original Quantar and

the PA from the Spectra™ mobile radio. Since the translations

depend upon the frequency band of the Exciter and the PA, this

circuitry is also frequency-sensitive.

The DIP switches on the motherboard must be set according to the

frequency of the station in order for the proper translation path to be

selected. The DIP switch settings can remain intact if

•The band of the new PA matches the one being

replaced, and

•The Exciter is not being changed.

If the PA band or the Exciter band is being changed, the DIP

switches must be conﬁgured to match the new frequency of the PA

and Exciter. Detach the motherboard from the chassis and set the

switches as described in the Backplane subsection of “Module

Replacement.”

Physical Replacement of

the Power Ampliﬁer 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

3. Remove the four Phillips screws from the front, right quadrant

of the top panel to release the PA. When removing the fourth

screw, support the PA inside the chassis to prevent it from

falling.

4. Disconnect all four cables between the PA and the station:

a. Unplug the red and black power cable from the PA.

b. Unscrew the mini-UHF connector from the PA.

c. To remove the PA ribbon cable connector, remove the two

Torx screws holding the metal clip over the connector. Pull

the connector loose from the PA.

d. Unscrew the mini-UHF connector on the remaining cable

from the front of the Exciter.

68P81093C75-O September 27, 2000 9-33

5. Reconnect all four cables removed in Step 4. The ribbon cable

connector is keyed so it cannot be attached incorrectly.

Remember to reattach the metal clip over the ribbon cable

connector.

6. Take the sheet of black thermal conductive ﬁlm that was

between the old PA and the chassis and place it on the new PA.

7. Place the PA in the chassis and line up the screw holes in the PA

and the thermal ﬁlm with the holes in the top panel of the

chassis. (It may be useful to insert a pencil, pen, or small

screwdriver through the screw holes in the top panel to aid in

aligning the holes in the conductive ﬁlm with those in the PA.)

8. While holding the PA with one hand, start two or more Phillips

screws in the top panel to hold the PA in place. Insert the

remaining screws and tighten all four.

9. Place the chassis back in the case and secure it with the eight

Phillips screws around the top panel.

After Installing the New

Power Ampliﬁer Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35), or the Setup and

Connections section of this manual, or both.

•Power Output

Power Supply

Physical Replacement of

the Power Supply 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Detach the backplane from the chassis as described in Steps 1

through 7 of the Backplane subsection of “Module

Replacement.”

3. Remove the four Phillips screws holding the Power Supply to

the top panel of the chassis. Pull the PS out of the chassis.

4. Disconnect all ﬁve wires from the Power Supply.

5. Reconnect the wires to the new Power Supply as follows:

•Green to GND

•Orange to the “H” INPUT

•Brown to the “N” INPUT

•White to the “POS” OUTPUT

•Black to the “NEG” OUTPUT.

6. While holding the PS with one hand, start two or more Phillips

screws in the top panel to hold the Power Supply in place. Insert

the remaining screws and tighten all four.

9-34 September 27, 2000 68P81093C75-O

7. Finish reassembling the station as described in Steps 8 through

12 of the Backplane subsection of “Module Replacement.”

Backplane

Before Installing the New

Backplane The PDR 3500 motherboard contains circuitry which translates

between the Exciter from the original Quantar and the PA from the

Spectra™ mobile radio. Since the translations depend upon the

frequency band of the Exciter and the PA, this circuitry is also

frequency-sensitive. For the proper translation path to be selected,

the DIP switches located on the motherboard must be set based on

the frequency band of the station.

Before installing the new Backplane, set its DIP switches according

to Table 10.

Physical Replacement of

the Backplane 1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

3. Remove the cover plate on the left end of the front of the station

by removing two Torx screws from the front of the plate and

four Phillips screws from the side and bottom edges of the plate.

4. Pull the Station Control Module and Wireline Module until they

disengage from their respective backplane connectors. The

modules need not be completely removed from the chassis.

5. On the back of the chassis, remove the six Phillips screws

holding the backplane in place.

6. Slowly, but ﬁrmly, pull the bottom edge of the backplane away

from the chassis. Continue pulling until the 80-pin card edge

connectors dislodge from the Receiver and Exciter modules.

Then pull the backplane down and away from the top panel of

the chassis.

7. Lay the backplane ﬂat behind the station, and remove all the

attached wires.

8. If the dip switches on the new backplane have not been set to

match the PA/Exciter combination of the station, set them now

according to Table 10.

Table 10 Motherboard DIP Switch Settings

Exciter Frequency

Band PA Model Switch 1 Switch 2

VHF Range 1 PLD7981 OFF OFF

VHF Range 2 PLD7981 ON OFF

UHF Range 1 PLE9367 OFF ON

UHF Range 2 PLE9369 ON ON

68P81093C75-O September 27, 2000 9-35

9. Lay the new backplane behind the station, and attach all the

wires as shown in Figure 10: Interconnect Diagram.

10. Hold the backplane in position behind the chassis. Ensure the

wires from the backplane do not bind against the Power Supply.

Slide the top of the board toward the chassis top panel, making

sure the two RJ-45 connectors ﬁt into their cutouts.

11. Hold the Receiver Module from the front of the chassis, and

press the bottom center of the backplane into place against the

chassis. Snap the 80-pin connectors onto the Receiver and

Exciter.

12. While holding the top right portion of the backplane against the

chassis, press the Control Module, and then the Wireline

Module, into the chassis from the front, until they snap into the

backplane.

13. Using the six Phillips screws with lock washers, secure the

backplane to the chassis.

14. Finish reassembling the station by reversing Steps 2 and 3.

After Installing the New

Power Ampliﬁer Perform the following alignment procedures as described in the RSS

User’s Guide (68P81085E35), or the Setup and Connections

section of this manual, or both:

•Power Output

Using the RSS, run a complete battery of diagnostics to exercise all

boards and modules.

Preselector Field

Tuning Procedure The VHF and UHF Receiver Modules comprise a circuit board and

a preselector assembly. Both are secured in a slide-in module

housing.

The preselector assembly is a 3-pole (UHF) or a 5-pole (VHF)

bandpass ﬁlter, equipped with tuning slugs to adjust the passband

corresponding to the operating frequencies of the station. The

preselector assembly must be ﬁeld-tuned if replaced in the ﬁeld, or

if the station operating frequency (or frequencies) is (are) modiﬁed.

The tuning procedure follows.

IMPORTANT! Tuning for best SINAD response DOES NOT result in optimum

tuning of the preselector assembly. You must use this ﬁeld-

tuning procedure to obtain optimum preselector performance.

9-36 September 27, 2000 68P81093C75-O

Required Test

Equipment The following test equipment is required to properly tune the

preselector assembly:

•RF Signal Generator: Motorola R2600

Communications Analyzer, R2001

Communications Analyzer (see note), or

HP8656A signal generator (or equivalent)

•Dip/Peak Monitor: HP435B Power Meter (or

equivalent) with HP8484A sensitive power head,

Boonton Model 92E with BNC input, or R2001/

R2600, using the spectrum analyzer function.

•Torque Driver, capable of delivering 12 in. – lb. of

torque, and 10 mm deep well socket.

•Tuning probe: Motorola Part number

0180763D22, part of TRN7799A tuning kit.

•Flat-blade screwdriver

NOTE: The R2600 Communications Analyzer can both

generate and measure simultaneously. The R2001

may be used for either the generator or monitor

function, but not both simultaneously. When using

the R2001 as a signal generator, RF signal must be

taken from the antenna port.

VHF Tuning Procedure

Calculating Proper

Alignment Frequency Use one of the following two methods to calculate the alignment

frequency to be generated by the signal generator.

For stations with a single receive frequency, calculate the frequency

of the alignment signal as follows:

Step 1. From the site documentation or the RSS, determine

the station receive frequency.

Step 2. If the frequency is ≤ 148 MHz (Range 1) or ≤ 156

MHz (Range 2), subtract 250 kHz. Otherwise, note the

actual frequency.

Example: If the station receive frequency is 134.575

MHz (Range 2), subtract 250 kHz, since the frequency

is less than 143 MHz.

134.575 MHz - 250 MHz = 134.325 MHz

68P81093C75-O September 27, 2000 9-37

Step 3. If Receiver Module is Range 1, determine the

alignment frequency as follows:

If the frequency (from Step 2) is < 134 MHz, then the

alignment frequency = 133.75 MHz.

If the frequency (from Step 2) is > 152 MHz, then the

alignment frequency = 152 MHz.

Otherwise, use the actual frequency from Step 2.

Step 4. If the Receiver Module is Range 2, determine the

alignment frequency as follows:

If the frequency (from Step 2) is < 152 MHz, then the

alignment frequency = 151.75 MHz.

If the frequency (from Step 2) is > 172 MHz, then the

alignment frequency = 172 MHz.

Otherwise, use the actual frequency from Step 2.

For stations with multiple receive frequencies, calculate the

frequencies of the alignment signal as follows:

Step 1. From the site documentation, or the RSS, note the

receive frequency for each channel supported by the

station.

Step 2. Calculate a midpoint frequency as follows:

Fmid = (Fhighest + Flowest) ÷ 2

Step 3. Using Fmid in place of the station receive frequency,

perform Step 2 through Step 4 above.

Preparing Equipment Step 1. Make sure the Receiver Module (with the Preselector

Assembly) is installed in a functional PDR 3500.

Step 2. Remove the chassis from its case by removing the

eight Phillips screws from the edges of the station’s

top panel.

Step 3. Remove the two Torx screws from the Receiver

Module front panel and remove the four Phillips

screws. Remove the panel.

Step 4. De-tune the preselector as follows:

9-38 September 27, 2000 68P81093C75-O

If the alignment frequency (calculated in the previous

section) is greater than 148 MHz (Range 1), or

greater than 156 MHz (Range 2), turn the ﬁve tuning

screws in (clockwise) until 1/8" protrudes past each of

the tension nuts.

If the alignment frequency is less than, or equal to 148

MHz (Range 1), or 156 MHz (Range 2), back out

(counterclockwise) the ﬁve tuning screws until 3/4"

protrudes past each of the tension nuts.

Step 5. Using the torque driver and deep-well socket, tighten

the ﬁve tension nuts on the adjustment screws to

6 in. – lb.

Step 6. Connect the test equipment as shown in Figure 12.

VHF Tuning Procedure Step 1. Provide power to the PDR 3500 through either DC or

AC (to provide the active 50 Ω termination).

Step 2. Adjust the signal generator to the frequency calculated

on page 36. Set the level to +5 dBm.

Figure 12 Test Equipment Setup for Preselector Field Tuning

Tension Nut

Tuning Screw

To Dip/Peak

Monitor

(RF Millivoltmeter

or Power Meter)

From

Signal

Generator

Tuning

Probe

Receiver

Board

To RX

Connector

on Top Panel

Preselector

Assembly

RX TX

MAEPF-27038-O

68P81093C75-O September 27, 2000 9-39

Step 3. Insert the tuning probe into the cavity “H1” and adjust

tuning screw 1 for a PEAK.

Step 4. Leave the tuning probe in cavity “H1” and adjust

tuning screw 2 for a DIP.

Step 5. Insert the tuning probe into cavity “H2” and adjust

tuning screw 3 for a DIP.

Step 6. Insert the tuning probe into cavity “H3” and adjust

tuning screw 4 for a DIP.

Step 7. Insert the tuning probe into cavity “H4” and decrease

the output from the signal generator to -5 dBm.

Step 8. Adjust tuning screw 5 for a DIP. Then turn tuning

screw 5 one-quarter turn counterclockwise.

NOTE: The DIP will not be as sharp for screw 5 as it was for

screws 2 through 4.

UHF Tuning Procedure

Calculating Proper

Alignment Frequency Use one of the following two methods to calculate the alignment

frequency to be generated by the signal generator.

For stations with a single receive frequency, calculate the frequency

of the alignment signal as follows:

Step 1. From the site documentation, or the RSS, determine

the station receive frequency. Add 200 kHz.

Step 2. If the Receiver Module is Range 1, determine the

alignment frequency as follows:

Figure 13 Location of Tuning Screws and Cavity Probe Holes

Receiver

Board

Station Receive

Antenna Port

Preselector

Assembly

MAEPF-27039-O

TUNING SCREW 1

TUNING SCREW 2

TUNING SCREW 3

TUNING SCREW 4

TUNING SCREW 5

9-40 September 27, 2000 68P81093C75-O

If the frequency (from Step 1) is > 431 MHz, then the

alignment frequency = 431 MHz.

If the frequency (from Step 1) is < 405 MHz, then the

alignment frequency = 405 MHz.

Otherwise, use the actual frequency from Step 1.

Step 3. If Receiver Module is Range 2, determine the

alignment frequency as follows:

If the frequency (from Step 1) is > 468 MHz, then the

alignment frequency = 468 MHz.

If the frequency (from Step 1) is < 440 MHz, then the

alignment frequency = 440 MHz.

Otherwise, use the actual frequency from Step 1.

Step 4. If the Receiver Module is Range 3 or 4, determine the

alignment frequency as follows:

If the frequency (from Step 1) is > 518 MHz, then the

alignment frequency = 518 MHz.

If the frequency (from Step 1) is < 472 MHz, then the

alignment frequency = 472 MHz.

Otherwise, use the actual frequency from Step 1.

For stations with multiple receive frequencies, calculate the

frequencies of the alignment signal as follows:

Step 1. From the site documentation, or the RSS, note the

receive frequency for each channel supported by the

station.

Step 2. Calculate a midpoint frequency as follows:

Fmid = (Fhighest + Flowest) ÷ 2

Step 3. Using Fmid in place of the station receive frequency,

perform Step 1 through Step 4 above.

Preparing Equipment Step 1. Make sure the Receiver Module (with the Preselector

Assembly) is installed in a functional PDR 3500.

68P81093C75-O September 27, 2000 9-41

Step 2. Remove the chassis from its case by removing the

eight Phillips screws from the edges of the station’s

top panel.

Step 3. Remove the two Torx screws from the Receiver

Module front panel and remove the four Phillips

screws. Remove the panel.

Step 4. Using the torque driver and deep-well socket, loosen

the three tension nuts on the adjustment screws.

Step 5. De-tune the preselector as follows:

Turn tuning screws 3 and 4 clockwise until they bottom

out. Be careful not to apply more than 3 in. – lb. of

torque to prevent warping the preselector cover and

housing.

Step 6. Connect the test equipment as shown in Figure 14.

Tuning Procedure Step 1. Turn the station power supply ON (to provide the

active 50 Ω termination).

Step 2. Adjust the signal generator to the frequency calculated

on page 39. Set the level to +5 dBm.

Figure 14 Test Equipment Setup for Preselector Field Tuning

From

Signal

Generator

RX TX

Tension Nut

Tuning Screw

To Dip/Peak

Monitor

(RF Millivoltmeter

or Power Meter)

Tuning

Probe

Receiver

Board

To RX

Connector

on Top Panel

Preselector

Assembly

MAEPF-27040-O

9-42 September 27, 2000 68P81093C75-O

Step 3. Insert the tuning probe into the cavity “U2” and adjust

tuning screw 2 for a PEAK.

Step 4. Tighten tension nut on tuning screw 2 to at least

12 in. – lb. and ﬁne tune tuning screw 2 for a PEAK.

Step 5. Keep the tuning probe in cavity “U2” and adjust

tuning screw 3 for a DIP.

Step 6. Tighten tension nut on tuning screw 3 to at least

12 in. – lb. and ﬁne tune tuning screw 3 for a DIP.

Step 7. Insert the tuning probe into cavity “U3” and decrease

the output from the signal generator to -5 dBm.

Step 8. Adjust tuning screw 4 for a DIP.

Step 9. Tighten tension nut on tuning screw 4 to at least

12 in. – lb. and ﬁne tune tuning screw 4 for a DIP.

Figure 15 Location of Tuning Screws and Cavity Probe Holes

Receiver

Board

Station Receive

Antenna Port

Preselector

Assembly

MAEPF-27041-O

TUNING SCREW 2

TUNING SCREW 3

TUNING SCREW 4

68P81093C75-O September 27, 2000 10-1

Functional Theory

of Operation 10

The following functional theory of operation provides an overview

of the station circuitry. For a more thorough functional description

of a particular module, refer to the appropriate section of the

Quantar User’s Guide (68P81095E05). Refer to the block diagram

in Figure 16. for the following functional theory of operation.

Transmitter Circuitry

Operation

Introduction The Transmitter Circuitry consists of the following:

• Exciter Module

• Power Ampliﬁer (PA) Module

These modules combine to produce the modulated, ampliﬁed RF

signal. The RF signal is transmitted via the station transmit antenna.

Exciter Module

Operation The Exciter Module is a microprocessor-controlled module,

generating a modulated RF signal at the desired transmit frequency.

It sends this signal to the Power Ampliﬁer for ampliﬁcation. The

circuitry operates as follows:

1. The Synthesizer/Voltage-Control Oscillator (VCO) accepts

frequency programming data from the Station Control Module

(SCM) via the Serial Peripheral Interface (SPI) bus and

generates an RF carrier signal at the speciﬁed frequency.

The modulation audio signal from the SCM modulates the carrier,

resulting in a modulated RF signal at approximately +13dBm. The

modulated signal is routed to the Power Ampliﬁer.

2. The TX Power Control Circuitry accepts an output power detect

voltage from the Power Ampliﬁer and compares this signal to a

reference voltage representing the desired output power.

Based on the comparison, a power control voltage is generated to

control the output power from the PA. This feedback and control

loop continually monitors the output power. It adjusts the control

voltage to maintain the proper output power from the PA.

10-2 September 27, 2000 68P81093C75-O

Power Ampliﬁer

Module Operation The PDR 3500 uses the mid-power Spectra RF power ampliﬁer (RF

PA) board, housed in a heavy-duty, shielded, aluminum heat sink.

The gain of the RF PA board is controlled by the power control

voltage from the Exciter Module.

The modulated RF signal is ampliﬁed by the RF PA and sent to the

site transmit antenna.

The transmit path inside the RF PA contains a directional coupler

(calibrated at setup), which feeds a DC voltage (proportional to the

output power) to the TX Power Control Circuitry in the Exciter

Module. This signal serves as the feedback signal in the power

control loop.

Receiver Circuitry

Introduction The Receiver Circuitry performs the following functions:

•Accepts receive RF signals from the site receive antenna

•Filters and dual conversion

•Outputs a digitized receive signal to the Station Control Module.

Receiver Module

Operation The receive signal is generated from the site receive antenna to a

multi-pole, preselector ﬁlter which provides highly selective

bandpass ﬁltering.

The ﬁltered signal is then ampliﬁed and fed to the RF input of the 1st

mixer.

The 1st mixer combines the ﬁltered signal with an injection signal

generated by the Synthesizer/VCO. This results in a 21.45 MHz

(VHF), or 73.35 MHz (UHF) 1st IF (intermediate frequency) signal.

(The injection signal is determined by frequency programming data

from the Station Control Module via the SPI bus.)

The 21.45 or 73.35 MHz 1st IF is ﬁltered and routed to a custom

receiver IC. This component contains the following circuitry:

•2nd injection and mixing

•Ampliﬁcation

•A/D (analog to digital) conversion

This results in a digitized receive signal. This signal is routed to the

Station Control Module as differential data.

68P81093C75-O September 27, 2000 10-3

Station Control

Module

Introduction The Station Control Module (SCM) is the microprocessor-based

controller for the station. Major components include the following:

•MC68360 microprocessor,

•56002 Digital Signal Processor (DSP)

•Two Application Speciﬁc Integrated Circuit (ASIC) devices

(host and DSP).

Station Control Module

Operation The Host Microprocessor (µP) serves as the controller for the SCM,

operating from the station software stored in FLASH memory. This

software determines the system capabilities of the station (analog,

ASTRO, SECURENET, etc.).

The Host µP communicates with the station modules and the SCM

circuitry via address and data buses, a High-Level Data Link Control

(HDLC) bus, and a Serial Peripheral Interface (SPI) bus. External

communications is accomplished using a serial port on the top panel.

The DSP and DSP ASIC perform the necessary digital signal

processing for the station audio and data signals. The DSP circuitry

interfaces with the Receiver Module (receive audio), the Exciter

Module (modulation signal), and the Wireline Interface Board

(wireline audio).

The 2.1 MHz Reference Oscillator generates the reference signal

used by the Receiver and Exciter Modules.

Wireline Interface

Board

Introduction The Wireline Interface Board (WIB) serves as the interface between

the customer telephone lines and the station. In general, the WIB

processes and routes all wireline audio signals between the station

and the landline equipment (such as consoles, modems, etc.).

Landline-to-station and station-to-landline audio signals are

connected to the WIB via RJ-45 connectors on the top panel of the

station.

Wireline Interface

Board Operation The WIB contains the following:

•A microprocessor

10-4 September 27, 2000 68P81093C75-O

•Two FLASH memory ICs (which contain the WIB operating

software downloaded by the SCM)

•An ASIC device to process and route the various audio signals

Analog, SECURENET, and ASTRO signals are processed as follows:

•Analog signals are converted to digital signals and routed to the

Station Control Module via the Time Division Multiplex (TDM)

bus.

•ASTRO and ASTRO CAI data signals are processed by an ASTRO

modem card (the daughter board is plugged into the WIB) and

sent to/from the SCM via the HDLC bus. (The station operates

in transparent mode only, and does not perform encryption or

decryption of the ASTRO or ASTRO CAI signal.)

• SECURENET encoded signals are processed by the ASIC, sent

to/from the microprocessor via the data bus, and sent to/from the

Station Control Module microprocessor via the HDLC bus.

(The station operates in transparent mode only, and does not

perform encryption or decryption of the SECURENET signal.)

NOTE: The WIB is offered in the 4-wire conﬁguration only.

Power Supply Module

Operation The Power Supply Module is a switching-type power supply which

accepts an AC input (85-265 VAC, 49-61 Hz) and generates the 13.8

VDC for the station modules and the power regulation circuitry on

the motherboard.

The Power Supply Module is capable of 12 A continuous load and

18 A maximum load.

Motorola Solutions 92FT3800 PDR 3500 Portable Repeater User Manual 93C75 O Book

Motorola Solutions, Inc. PDR 3500 Portable Repeater 93C75 O Book

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