Motorola 92FT4847 Users Manual

PDR 3500

Transportable Repeater

Basic Service Manual

1

2

A

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 and General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

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

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

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

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

External Duplexer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Repeater RA or Cross Band Repeater Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

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

All Rights Reserved. Printed in U. S. A. 2/2001.

© 2000, 2001 Motorola

68P81093C75-O January 31, 2001 i

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

ii January 31, 2001 68P81093C75-O

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

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

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

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 Detail. . . . . . . . . . . . . . . . . . . . . . 11-1

68P81093C75-O January 31, 2001 iii

List of Tables

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

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

Table 3: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 4: Specifications, continued . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5: Switches, Pushbuttons, and Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Table 6: Summary of LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Table 7: Switches, Pushbuttons, and LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Table 8: PDR 3500 LED Indicator Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Table 9: 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 Troubleshooting Overview (Procedure 1: Routine Maintenance). . . . . . . . . . . . . . . . . . . . . 9-3

Figure 4. PDR 3500 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

Parts Lists

Electrical Parts List: Backplane Circuit Board......................................................................... 11-5

Mechanical Parts List: PLN1681A Main Chassis .................................................................... 11-7

iv January 31, 2001 68P81093C75-O

Foreword

General

Safety Information

Manual Revisions

Computer Software Copyrights

1

The information contained in this manual supplement relates to all
PDR 3500s, unless otherwise specified. This manual provides
sufficient information to enable service shop personnel to
troubleshoot and repair a PDR 3500 to the module level.

Before operating a PDR 3500, please read the “Safety Information”
section in the front of this manual.

Changes which occur after this manual is printed are described in
“FMRs.” These FMRs provide complete information on changes,
including pertinent parts list data.

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

68P81093C75-O December 1, 2000 1-1

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.

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

Motorola Parts

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: [phone]
FAX: [phone] (Federal Government)
Domestic (U. S. A.) after hours or weekends:
1-800-925-4357
International: 1-847-538-8023

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

Related Documents

1-847-538-0021 (Voice)
1-847-538-8194 (FAX)

Quantar User’s Guide (Motorola part number 68P81095E05)

RSS User’s Guide (Motorola part number 68P81085E35)

1-2 December 1, 2000 68P81093C75-O

•

•

•

•

•

•

•

•

Safety and General Information

Important Information

RF Operational Characteristics

Exposure to Radio Frequency Energy

IMPORTANT INFORMATION ON SAFE AND EFFICIENT
OPERATION. READ THIS INFORMATION BEFORE USING
YOUR TRANSPORTABLE REPEATER.

Your transportable Repeater contains a transmitter and a receiver.
When it is ON, it receives and transmits radio frequency (RF)
energy.

Your Motorola transportable Repeater is designed to comply with
the following national and international standards and guidelines
regarding exposure of human beings to radio frequency
electromagnetic energy:

United States Federal Communications Commission, Code of
Federal Regulations; 47 CFR part 2 sub-part J

2

American National Standards Institute (ANSI) / Institute of
Electrical and Electronic Engineers (IEEE) C95. 1-1992

Institute of Electrical and Electronic Engineers (IEEE) C95.1­1999 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

Australian Communications Authority Radiocommunications
(Electromagnetic Radiation - Human Exposure) Standard 1999
(applicable to wireless phones only)

68P81093C75-O December 1, 2000 2-1

•

•

•

•

•

•

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.

FIXED SITE

ANTENNAS

Transportable Repeater equipment is transported to and then set up
at a fixed location and operated as a fixed control station or repeater .
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. The lo west point

of the antenna must be elevated a minimum of 10 meters above
the ground. This may require the use of a coaxial cable extension
for the antenna.

If the antenna is to be mounted on a building, then it must be
mounted on the roof. If the antenna supplied with the repeater is
used and the repeater cannot be located within the 12 ft. cable
length, then a coaxial cable extension should be used.

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.

2-2 December 1, 2000 68P81093C75-O

Introduction

General

Compact Mechanical Design

State-of-the-Art Electrical Design

3

The Motorola PDR 3500 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.

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.

Transmitter Circuitry

Receiver Circuitry

Station Control Module

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.

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 cov erage
area.

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.

68P81093C75-O December 1, 2000 3-1

•

•

•

•

•

•

•

•

•

•

•

Wireline Circuitry

Switching Power Supply

Standard Features

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.

The station features a switching-type power supply, accepting a
wide range of A C inputs (85-265 VAC, 49-61 Hz). The po wer supply
generates 13.8 VDC for the station modules.

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

Optional Hardware Features

Versatile and reliable switching-type power supply
Wide operating temperature range: -30˚ C to + 60˚C (-22˚ F to

+140˚ F)

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.

3-2 December 1, 2000 68P81093C75-O

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
T one remote console controls the station via wireline through the
DIU. The wireline in this case is a local 4-wire cable.

External Duplexer Operation

Repeater RA or Cross Band Repeater 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. Double­shielded coaxial cables must be used from the repeater to the
duplexer.

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 December 1, 2000 4-1

Notes

4-2 December 1, 2000 68P81093C75-O

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Models and Specifications

Model Chart

Table 1: Model Structure

Model Description

P2066B 132-154 MHz

P2067B 150-174 MHz

P2068B 403-433 MHz

P2069B 438-470 MHz

P2070B 470-494 MHz

P2071B 494-512 MHz

Kit Description

PLD1177_ Receiver VHF R1
PLD1178_ Exciter VHF R2
PLD1179_ Receiver VHF R2
PLD1180_ Exciter VHF R2
PLE1254 Receiver UHF R1
PLE1255 Exciter UHF R1
PLE1256 Receiver UHF R2
PLE1257 Exciter UHF R2
PLE1258 Receiver UHF R3
PLE1259 Exciter UHF R3
PLE1260 Receiver UHF R4
PLE1261 Exciter UHF R4

XXXXXX PLN1682_ Board, Control
X X X X X X PLN1681_ Chassis, main
XXXXXX PLN7776_ Case, portable
X X X X X X PLN7777_ Board, backplane
XXXXXX PPN6026_ Power supply
X X

X X

X X

XXXX PFE6060A Duplexer, UHF
X X X X X X PAN6003A Antenna, mag mount
XXXXXX PDR7778A Label
X X X X X X PBN6048A Packing

x = Indicates one of each is required.

PLD7981_ P A, VHF
PLE9367_ PA, UHF R1
PLE9369_ PA, UHF R3
PLE9372_ PA, UHF R4
PFD6060_ Duplexer, VHF

5

68P81093C75-O January 31, 2001 5-1

Table 2: Options

OPTION

DESIGNATOR

Q245 Add: Duplexer Adds VHF or UHF duplexer. Requires customer frequency.
Q463 Add: Antenna Relay Adds VHF/UHF antenna relay for base station operation.
Q502 Add: Wireline Adds wireline remote control option.
Q504 Add: ASTRO 9.6 Kbps Modem Adds 9.6 Kbps modem card.
Q661 Add: DC Barry Cable Adds cable with alligator clip for external battery operation.
H338AC Add: Transit Case Adds a transit case for increased protection during transport.

Maintenance
Specifications

DESCRIPTION PURPOSE

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: 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)

Spurious and image 80 dB 80 dB

Note: Specifications are subject to change without notice.

75 dB

5-2 January 31, 2001 68P81093C75-O

Table 4: 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.

68P81093C75-O January 31, 2001 5-3

Notes

5-4 January 31, 2001 68P81093C75-O

Approved Accessories 6

General The following accessories are recommended by Motorola for use

with the PDR 3500.

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

68P81093C75-O September 27, 2000 6-1

Notes

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

Setup and Connections 7

Programming with RSS

Introduction

Connecting PC to PDR 3500 RSS Port

EIA-232 Female

TXD
RXD

Connects

to COM Port

on PC

GND

RTS
CTS

9-Pin

D-Type

1
2
3
4
5
6
7
8
9

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.

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 EIA­232 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.

9-Pin

D-Type

EIA-232 Male

1

TXD

2

RXD

3
4

GND

5
6

RTS

7

CTS

8
9

Connects

to RSS Port

on Top Panel

MAEPF-27075-O

Figure 1. EIA-232 Wiring Diagram

68P81093C75-O December 1, 2000 7-1

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. ” No w press “F3” to arri ve

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.

7-2 December 1, 2000 68P81093C75-O

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 v alue sho wn
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.

68P81093C75-O December 1, 2000 7-3

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 ov er 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 receiv ers. 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, ASTR O, ASTR O CAI,

7-4 December 1, 2000 68P81093C75-O

Electrical Connections

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 Po wer Out to the desired power lev el.
(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.

Power Supply Connections

RF Cabling 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.

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

68P81093C75-O December 1, 2000 7-5

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-to­UHF 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).

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 N­type connector labeled “TX” on the duplexer .

3. Connect the antenna UHF-type connector to the connector
labeled “ANT” on the duplexer.

NOTE: To assure optimal performance and that human

exposure to radio frequency electromagnetic energy
is within guidelines, the antenna should be mounted
as described in Section 2, Safety and General
Information, under Fixed Site Antennas.

7-6 December 1, 2000 68P81093C75-O

Operation 8

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

LED indicators on the PDR 3500 used during local operation of the
station and servicing.

Summary of Switches, Pushbuttons, and Connectors

Summary of LED Indicators

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.

Table 5 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

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 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

68P81093C75-O December 1, 2000 8-1

Duplexer

Wireline

Connections

(RJ-45)

A

B

C

D

E

Antenna

F

Receive

UHF Jack

Transmit

UHF Jack

MAEPF-27065-O

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

Table 7 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.

8-2 December 1, 2000 68P81093C75-O

Troubleshooting 9

Introduction This section provides troubleshooting recommendations and

procedures for the PDR 3500 and associated ancillary equipment.

Troubleshooting Overview

Recommended T est Equipment

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

Follow this list of recommended test equipment when performing
troubleshooting procedures on the PDR 3500 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

68P81093C75-O December 1, 2000 9-1

The troubleshooting and repair philosophy employs Field
Replaceable Unit (FRU) substitution. The PDR 3500 is comprised of
self-contained modules (FRUs). Replacing faulty modules should
bring the station back to normal operation.

Many of the troubleshooting procedures require the use of the
Motorola-supplied Radio Service Software (RSS) since the PDR
3500 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 pro vided for troubleshooting the PDR 3500 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 2: Troubleshooting A Reported/Suspected Problem

How to Use These Troubleshooting Procedures

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 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).

Perform the following basic steps in order to efficiently troubleshoot
the PDR 3500 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.

9-2 December 1, 2000 68P81093C75-O

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

PROCEDURE 1

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

INTERPRET STATUS REPORT
(RSS USER’S GUIDE–68P81085E35)

• USING RSS, ACCESS THE STATUS REPORT
SCREEN AND LOOK AT HISTORY OF ALARMS

AND TIME STAMPS

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

RUN STATION DIAGNOSTICS
(RSS USER’S GUIDE–68P81085E35)

• USING RSS, RUN DIAGNOSTICS ON
STATION MODULES

YES

YES

GO TO TROUBLESHOO TING
PROCEDURE 2 FLOW CHART

GO TO TROUBLESHOO TING
PROCEDURE 2 FLOW CHART

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

DONE

YES

GO TO TROUBLESHOO TING
PROCEDURE 2 FLOW CHART

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

68P81093C75-O November 30, 2000 9-3

REPORTED OR SUSPECTED

PROBLEM

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

PROCEDURE 2

LED PATTERN

INDICATES STATION

IN SOFTWARE

DOWNLOAD MODE?

NO

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

RUN STATION DIAGNOSTICS
(RSS USER’S GUIDE–68P81085E35)

• USING RSS, ACCESS DIAGNOSTICS SCREEN,
RUN DIAGNOSTICS, AND INTERPRET RESULTS

YES

USING RSS, ACCESS THE STATUS

YES

REPORT SCREEN. ANALYZE
MESSAGES TO DETERMINE IF
MODULE FAILURE HAS OCCURRED.

GO TO MODULE REPLA CEMENT
PROCEDURES ON page 25

MODULE

SUSPECTED

OF BEING

FAULTY?

YES

NO

USING RSS, DOWNLOAD STATION
SOFTWARE TO FLASH MEMORY
ON STATION CONTROL BOARD

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

GO TO

YES

GO TO MODULE REPLACEMENT
PROCEDURES ON page 25

A

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

9-4 December 1, 2000 68P81093C75-O

A

CHECK CODE PLUG PROGRAMMING
(RSS USER’S GUIDE – 68P81085E35)

• USING RSS, READ THE STATION CODE PLUG
AND VERIFY THA T PROGRAMMING IS

CORRECT (COMPARE TO CODE PLUG FILE ON
PC FOR PARTICULAR STATION)

PROCEDURE 2
(CONTINUED)

CODE

PLUG

PROGRAMMING

CORRECT?

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

MODULE

SUSPECTED

OF BEING

FAULTY?

NO

RUN TRANSMITTER AND RECEIVER TESTS:

• PERFORM VERIFYING TRANSMITTER CIRCUITRY

TESTS (Page 10) TO ISOLATE PROBLEM TO

TRANSMITER CIRCUITRY

• PERFORM VERIFYING RECEIVER CIRCUITRY TESTS
(Page 14) TO ISOLATE PROBLEM TO RECEIVER
CIRCUITRY

• RE-PROGRAM STATION CODE PLUG BY DOWNLOADING
CUSTOMER DATA FROM CODE PLUG FILE FOR

NO

PARTICULAR STATION (RSS GUIDE – 68P81085E35)

• IF PROBLEM STILL EXISTS, PROCEED TO INTERPRET

STATUS REPORT

YES

GO TO MODULE REPLACEMENT
PROCEDURES ON page 25

REPLACE FAULTY MODULE AS
DESCRIBED IN MODULE RELACEMENT
PROCEDURES BEGINNING ON page 25

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

68P81093C75-O November 30, 2000 9-5

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 8.

Table 8: PDR 3500 LED Indicator Functions

LED Location LED Name Status Definition

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

– OFF when:

synthesizer is out of lock

or

+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

or

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:

EXCITER MODULE

PA Fail – RED when:

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

PA not keyed

or

PA keyed, and PA output power is at expected power level
(as set by technician via RSS during station alignment)

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.

– RED when station is transmitting
– OFF when AC or DC input power is absent

9-6 December 1, 2000 68P81093C75-O

Table 8: PDR 3500 LED Indicator Functions (Continued)

LED Location LED Name Status Definition

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)

STATION CONTROL
MODULE (SCM)

Rx 2 Active – Unused in PDR 3500
Rx Fail – RED when receiver is non-functional*

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

– 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

LEDs
Flashing Up
and Down in
Sequential
Pattern

WL On – GREEN when WIB fully functional

WIRELINE
INTERFACE BOARD
(WIB)

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 A C 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.

Both LEDs
Blinking
Rapidly

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

software failure.

– Station received software files from RSS and is in process of downloading the
software to FLASH memory in the Station Control Module

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

the FLASH memory on WIB from Station Control Module)

68P81093C75-O November 30, 2000 9-7

9-8 December 1, 2000 68P81093C75-O

STATION CONTROL MODULE

(Front Panel - Cover Plate Removed)

Handset

Speaker
RSS Port
Intercom/Shift
CSQ/PL/Off
Vol Down/

Access Disable
Vol Up/Local PTT

Station On
Station Fail
Intrem/AccD
Control Ch
Rx 1 Active
Rx 2 Active
Rx Fail
Aux LED

TOP PANEL

OF STATION

PWR/Tx
PTT/Reset

Switch

WL On
WL Fail

WIRELINE INTERFACE

MODULE

(Front Panel)

Tx Lock
PA Full
PA Low
PA Fail

EXCITER MODULE

(Front Panel)

MAEPF-27030-O

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

68P81093C75-O November 30, 2000 9-9

Interpreting Alarm Alert T ones

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 successi ve alarms (when
more than one alarm is active). The following two examples
illustrate the timing of the alarm tones.

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

The alarm tone definitions are as follows:

Number of

Beeps

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

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

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

4 Overvoltage Alarm is reported when battery charging voltage is above

Alarm Condition

Name

Alarm Condition Description

reverts to battery backup. Alarm is cleared when station
receives AC/DC power. Should not occur in PDR 3500.

Alarm is cleared upon successful keyup to full power.

lock. Alarm is cleared when both sythesizers lock.

+34.5 V (100 W stations), or +17.25 V (20 W stations). Alarm
is cleared when voltage returns to normal range.

9-10 December 1, 2000 68P81093C75-O

V erifying 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 T est 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 T ransmitter 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 co ver plate o ver the SCM side of
the chassis must be removed to access this connector.

Handset

PTT

Button

MEPF-27031-O

68P81093C75-O November 30, 2000 9-11

To

Antenna

If duplexer or antenna relay is used,
connect N-to-N cable from antenna
port to in-line wattmeter, otherwise

2

connect UHF-to-N cable from top
panel transmit jack to in-line wattmeter.
Connect wattmeter to dummy load.

Duplexer or

Antenna Relay

Antenna Port

Disconnect cable from antenna port of
duplexer or antenna relaly. If duplexer

1

or relay not used, disconnect cable
from top panel transmit output port.

Antenna

RF SECTION

COMMUNICATIONS
SYSTEM ANALYZER

RF Port Select Knob

789
456
1023

OSCILLOSCOPE

(Pull Out)

In-line

Wattmeter

Motorola

R2001 Communications

Analyzer

MONITOR

Dummy

Load

Connect antenna to R2001 antenna input.
Be sure to pull RF Port Select Knob

3

out to select antenna rf input.

MAEPF-27032-O

Figure 6 Test Equipment Setup for Verifying Transmitter Circuitry

9-12 December 1, 2000 68P81093C75-O

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

68P81093C75-O November 30, 2000 9-13

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.

9-14 December 1, 2000 68P81093C75-O

• 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 T est 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)

IMPOR

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

the station must be connected to a dummy load to prevent over­the-air broadcast during receiver testing.

68P81093C75-O November 30, 2000 9-15

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

9-16 December 1, 2000 68P81093C75-O

Disconnect cables from top
panel transmit and

1

receive ports.

To

Antenna

Connect handset to RJ-11 jack on
front panel of Station Control Module

3

(or External Speaker to RJ-11 jack).

RF SECTION

COMMUNICATIONS
SYSTEM ANALYZER

RF In/Out

Connect UHF-to-N cable from station top panel
receive port to R2001 RF in/out. Connect UHF-to-N

2

cable from top panel transmit port to dummy load.

Motorola

R2001 Communications

Analyzer

789
456
1023

MONITOR

OSCILLOSCOPE

Handset

PTT

Button

PDR 3500
Top Panel

Dummy

Load

MAEPF-27033-O

Figure 7 Test Equipment Setup for Verifying Receiver Circuitry

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

to the Oscilloscope input BNC connector, as shown
below.

COMMUNICATIONS
SYSTEM ANALYZER

789
456
1023

RF SECTION

To

Station

Receive

Connector

RJ-11 to BNC Test Cable

Motorola Part No. 01-82069W01

(Available from Motorola WASPD)

OSCILLOSCOPE

Oscilloscope

Input

Station Control

Module

Front Panel

MONITOR

Volume

Up Button

MAEPF-27034-O

68P81093C75-O November 30, 2000 9-17

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.)

9-18 December 1, 2000 68P81093C75-O

Duplexer

RX

PDR 3500

Top Panel

TX

PDR 3500
Top Panel

Capacitive

Coupler

(Isolated T)

RF SECTION

RF Output

RF SECTION

COMMUNICATIONS
SYSTEM ANALYZER

COMMUNICATIONS
SYSTEM ANALYZER

789
456
1023

OSCILLOSCOPE

R2001 Communications

MAEPF-27035-O

789
456
1023

OSCILLOSCOPE

Motorola
Analyzer

Dummy

Load

MONITOR

MONITOR

Duplexer

RF Output

TX

RX

Capacitive

Coupler

(Isolated T)

Motorola

R2001 Communications

Analyzer

Dummy

Load

MAEPF-27036-O

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

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.

68P81093C75-O November 30, 2000 9-19

Station Control

Module

Press and hold

1

Shift Button.

Intcm/Acc D LED

3

should Flash yellow.

Press Vol Down/

2

Access Disable

Exciter

Module

Figure 9 Disabling the Transmitter

PA Full LED should

4

NOT illuminate.

MAEPF-27037-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 sho wn

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 SIN AD le vel
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.)

9-20 December 1, 2000 68P81093C75-O

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.

Verifying Receiver
Circuitry (Digital­Capable Stations)

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.

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)

68P81093C75-O November 30, 2000 9-21

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 T est 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.

IMPOR

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

the station must be connected to a dummy load to prevent over­the-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:

9-22 December 1, 2000 68P81093C75-O

• 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.

68P81093C75-O November 30, 2000 9-23

Rx

Power

Supply

AC Jack

DC

B

D

C

SwitchLED

Motherboard

Terminal

Tabs

J20 P10

P5

P9

F

F

G

A

RSS

E

I

H

Tx

Fan Fan

J

MAEPF-27080-O

Receiver

K

Exciter

PA

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

C Power supply terminals POS,

NEG

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
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

Backplane terminals WHT, BLK 14 VDC from power supply

PA 14 VDC input 14 VDC to PA

9-24 December 1, 2000 68P81093C75-O

AC Inlet

(Viewed from

Underside)

Power Supply

Output Input

Pos

HN

Neg

BROWN

ORANGE

Nuts

Ring Lugs

Chassis

Ground Stud

GRN/YEL

GRN/YEL

Lock

Washers

Figure 11 Chassis Ground Wiring Diagram

Gnd

MAEPF-27099-O

Module Replacement Procedures

General Replacement Information

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.

Anti-Static Precaution

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.

The station circuitry contains many C-MOS and other static­sensitive 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.

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

!

68P81093C75-O November 30, 2000 9-25

• Do not insert or remove modules with power

applied. Al w ays turn of f 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

Power Down Station Before Removing/ Inserting Modules

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 e xtraction/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.

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.

9-26 December 1, 2000 68P81093C75-O

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 archiv al codeplug is una vailable, 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.

68P81093C75-O November 30, 2000 9-27

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

Wireline

Physical Replacement of the Wireline Module

For ASTRO stations only:

• Simulcast/ASTRO Launch Time Offset

For 6809 Trunking stations only:

• TDATA

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

9-28 December 1, 2000 68P81093C75-O

• 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

ASTRO Modem Card/ V.24 Interface Card

Physical Replacement of the Card

After Installing the New Card

Perform the following alignment procedures as described in the RSS
User’s Guide (part number 68P81085E35):

• Rx Wireline

• Tx Wireline

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 W ireline board
and locking all mounting posts and connectors.

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

68P81093C75-O November 30, 2000 9-29

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. 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.

After Installing the New Receiver Module

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.

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 ha ve 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.

9-30 December 1, 2000 68P81093C75-O

Exciter

Frequency Band Considerations

Physical Replacement of the Exciter Module

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. ”

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.

After Installing the New Exciter Module

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 card­edge 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.
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

68P81093C75-O November 30, 2000 9-31

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.

9-32 December 1, 2000 68P81093C75-O

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 P A in the chassis and line up the scre w 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

Power Supply

Physical Replacement of the Power Supply

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

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.

68P81093C75-O November 30, 2000 9-33

Backplane

7. Finish reassembling the station as described in Steps 8 through
12 of the Backplane subsection of “Module Replacement.”

Before Installing the New Backplane

Physical Replacement of the 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 9.

Table 9 Motherboard DIP Switch Settings

Exciter Frequency

Band

VHF Range 1 PLD7981 OFF OFF
VHF Range 2 PLD7981 ON OFF
UHF Range 1 PLE9367 OFF ON
UHF Range 2 PLE9369 ON ON

PA Model Switch 1 Switch 2

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 W ireline 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 9.

9-34 December 1, 2000 68P81093C75-O

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

Preselector Field Tuning Procedure

IMPOR

TANT! Tuning f or best SIN AD response DOES NOT result in optimum

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.

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.

tuning of the preselector assembly. You must use this field­tuning procedure to obtain optimum preselector performance.

68P81093C75-O November 30, 2000 9-35

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 fr equency , 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

9-36 December 1, 2000 68P81093C75-O

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:

F

= (F

mid

Step 3. Using F

mid

highest

+ F

lowest

) ÷ 2

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:

68P81093C75-O November 30, 2000 9-37

From

Signal

Generator

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.

RX

TX

Preselector

Assembly

To Dip/Peak

Monitor

(RF Millivoltmeter

or Power Meter)

Tension Nut

Tuning Screw

Tuning

Probe

To

Receiver

Board

MAEPF-27038-O

To RX

Connector

on T op Panel

Figure 12 Test Equipment Setup for Preselector Field Tuning

VHF T uning 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 frequenc y calculated

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

9-38 December 1, 2000 68P81093C75-O

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.

Preselector

Assembly

UHF Tuning Procedure

Calculating Proper Alignment Frequency

TUNING SCREW 1

TUNING SCREW 2

TUNING SCREW 3

TUNING SCREW 4

TUNING SCREW 5

Figure 13 Location of Tuning Screws and Cavity Probe Holes

H1

H2

H3

H4
H5

To

Receiver

Board

To

Station Receive

Antenna Port

MAEPF-27039-O

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 fr equency , 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:

68P81093C75-O November 30, 2000 9-39

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:

F

= (F

mid

Step 3. Using F

mid

highest

+ F

lowest

) ÷ 2

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.

9-40 December 1, 2000 68P81093C75-O

From

Signal

Generator

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 scre ws 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.

RX

TX

Preselector

Assembly

To RX

Connector

To

Receiver

Board

MAEPF-27040-O

on Top Panel

To Dip/Peak

Monitor

(RF Millivoltmeter

or Power Meter)

Tension Nut

Tuning Screw

Tuning

Probe

Figure 14 Test Equipment Setup for Preselector Field Tuning

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 frequenc y calculated

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

68P81093C75-O November 30, 2000 9-41

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.

Preselector

Assembly

To

Station Receive

Antenna Port

To

Board

TUNING SCREW 2

TUNING SCREW 3

TUNING SCREW 4

U2

U3

U4

Receiver

MAEPF-27041-O

Figure 15 Location of Tuning Screws and Cavity Probe Holes

9-42 December 1, 2000 68P81093C75-O

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

Exciter Module Operation

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.

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.

68P81093C75-O December 1, 2000 10-1

Power Amplifier
Module Operation

Receiver Circuitry

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.

Introduction

Receiver Module Operation

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.

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.

10-2 December 1, 2000 68P81093C75-O

Station Control Module

Introduction

Station Control Module Operation

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).

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-Lev el 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

The WIB contains the following:

Board Operation

• A microprocessor

68P81093C75-O December 1, 2000 10-3

• 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 Di vision Multiple x (TDM)
bus.

• ASTRO and ASTR O CAI data signals are processed by an ASTR O

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.)

Po wer Supply Module Operation

NOTE: The WIB is offered in the 4-wire configuration only.

The Power Supply Module is a switching-type power supply which
accepts an A C input (85-265 VA C, 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.

10-4 December 1, 2000 68P81093C75-O

Block Diagram, Schematics,
Electrical Parts List,
Circuit Board Detail, and Chassis Parts List

11

68P81093C75-O January 31, 2001 11-1

AC Input

(Top Panel)

DC Input

(Top Panel)

Receive

Antenna

RF Input/Output

(Top Panel)

SPI Bus

To/From Station

Control Module

POWER SUPPLY MODULE

Switching

Circuitry

Regulator

Circuitry

RECEIVER MODULE

Preselector

Filter

3-Pole (UHF)
5-Pole (VHF)

7-Pole (800/900)

Synthesizer/

VCO

2.1 MHz Ref

+13.8 V

+9.6 V

SW +5 V

LN +5 V

SPI Bus

To/From Station

Control Module

1st

Mixer

21.45 MHz (VHF)

73.35 MHz (UHF)

RSS Terminal

(Laptop Typical)

2.1 MHz Ref

2.1 MHz Ref

VCO & Ref Mod Audio

WIRELINE INTERFACE BOARD

Wireline Audio
From Landline

To Station

ASTRO

Custom

Bandpass

Filtering

Receiver IC

(2nd Injection,

Amplification,

A/D Conversion)

STATION CONTROL MODULE

Host

Microprocessor

Address

Data

HDLC Bus

Data

Address

Host

ASIC

Differential Data

Digital
Signal

Processor

(DSP)

SPI Bus
To/From

Station Modules

Data

Address

DSP

ASIC

Interface

DSP

ASIC

Audio

Interface

Bus

Modem

HDLC Bus

TDM Bus

Audio

Interface

Circuitry

Memory

RSS Host

Interface

Memory

2.1 MHz Ref

2.1 MHz Ref

2.1 MHz

Reference

Oscillator

TX Forward Power Detect

VCO & Ref

Mod Audio

EXCITER MODULE POWER AMPLIFIER MODULE

Power

Control

Circuitry

Microprocessor

PA Key

TX Enable

Amplifier

4 - Wire Audio Circuit

Microprocessor

Peripheral

Data

ASIC

Coupler

Wireline Audio

From Station

To Landline

Address

Data

Memory

External
Speaker

Handset

Transmit
Antenna

VCO & Ref

Mod Audio

2.1 MHz Ref

Synthesizer/

VCO

Figure 16. PDR 3500 Functional Block Diagram

11-2 January 31, 2001 68P81093C75-O

RF Switch

Circuitry

Modulated RF

+13 DBM

MAEPF-27042-O

A+

R1

22.1K
1%

R2

10K

LN+5

R3

5.62K

22.1K

1%

1%

R4
1%

POWER SUPPLY +

POWER SUPPLY -

EXTERNAL DC +

EXTERNAL DC -

1
2
3
4
5
6

LN+5 LN+5

7
8

2

P10
P10

8

P10

6

P10

4

P10

10

P1

1

P1

2

P2

1
2

P2

1

P3
P3

2

P4

1

P4

2

2

P5
P5

FAN

1

P5

3

P9

2

P9

3
4

P9
P9

5

P9

1

LN+5

20

AN0

EOC

VDD

AN1

SCLK

AN2

U8

AN3

DOUT
AN4
AN5

VREF
AN6

VAG

AN10

AN7
AN89AN9

VSS

10

9.6V

A+

C1

0.1uFC2470pF

19
18
17

DIN

16
15

CS*

14
13
12
11

Q4

VTEMP_FROM_PA
VFWD_FROM_PA

D2

LED_GREEN
LED_RED
PTT_SWITCH

RESET_SWITCH

9.6V

S

D

R60
10K

A+

PA POWER

ANTENNA RELAY

G

1

MC33074

3

MC74HC32A

Q5

U15

R44

20K

P6

1

P6

2

P7

1

P7

2

J9

31

2

P8
P8

3

P8

1

P8

4

15pF

U9

1

2

9.6V

R62
10K

D

G

S

R61

3.9K

3

2

C67

100pF

R45

10K

ANTRYKREYEDA+

C53 C54C52

U4

6

MC74HC32A

U4

8

MC74HC32A

PTT_REQ_INV

LN+5

R50
15K

A+

Q2

LED_GREEN

LN+5

U12

ENABLE*

6

LN+5

LN+5

LN+5

S

Q3

G

D

167

VCC

13

X

3

Y

10

A

9

B

VEE

GND

8

LN+5

R21

16.2K
1%

R22

10.5K
1%

LN+5

R48
10K

1%

R10

5.62K

R11

32.4K

1%

1%

R27
0

R28
1K

C39
470pF

C41

100pF

C45

470pF

R20
10K

1%

9

8

U3

10

MC33074

R46
10K

1%

C72

100pF

R24

33.2K
1%

R59
100

R25
0

R26
0

C38

0.1uF

L13

220nH

C42
470pF

R19

18.2K
1%

C71

100pF

R49

10.5K
1%

SPICLK
SPIMOSI
SPIMISO

U5

3

MC74HC86

U5

6

MC74HC86

U5

8

MC74HC86

C69

LN+5

A5

LN+5

1
2

4

5

9
10

R16
390

VR2

2.8V

R38
10K

1%

2

3

MC33074

15pF15pF

R51
10K

4
5

9

10

R52

6.2K

MC74HC32A

11

MC74HC32A

LN+5

3

R40

16.2K
1%

R41

10.5K
1%

220nH

U4

1

2

U4

12
13

C58

C57

39pF

39pF

L2

C60
100pF

VCONTROL

R39

18.2K
1%

100pF

LN+5

R5

11.5K
1%

R6

1K

C79

C55

100pF

39pF

A4

C56

39pF

A3

A0-CS1
A1-CS2

A2

C59
39pF

R17

20K
1%

R32

5.62K
1%

VR5

2.8V

R33

22.6K
1%

U3

1

LN+5

U15

5

6

MC33074

C68

100pF

U15

9

8

10

MC33074

R31
10K

R36

10K

1%

R37

10.5K
1%

LED_RED

R35

10K
1%

C70

100pF

S

G

7

D

R18

20K

1%

13
12

R14

100

R34

MC33074

S

Q1

G

D

R9

10K

12

X0

14

X1

15

X2

11

X3

1

Y0

5

Y1

2

Y2

4

Y3

10K

1%

U3

14

LN+5

C35

C34

470pF

0.1uF

16

12

X0

VCC

U11

VEE

7

U3

MC33074

13

X

3

Y

10

A

9

B

GND

8

12

X0

14

X1

15

X2

11

X3

1

Y0

5

Y1

2

Y2

4

Y3

7

C36
470pF

LN+5

167

VCC

U13

ENABLE*8GND

VEE

6

C37
470pF

13

X

3

Y

10

A

9

B

C47

C46

470pF

0.1uF

VTEMP_FROM_PA

C44

470pF

C61

470pF

SETTINGS FOR S1
1 2 BAND

VHF R1

000

VHF R2

011

UHF R1

11

UHF R2

C62

470pF

220nH

C40
100pF

L10

R43

R42

20K

20K

14

X1

15

X2

11

X3

1

Y0

5

Y1

2

Y2

4

Y3

ENABLE*

6

VFWD_FROM_PA VFINALFORWARD

R47

10K

1%

6

5

R12

16.2K
1%

R13

5.62K
1%

LN+5

S1

81

S1

72

A+

C64

0.22uF

C43

0.22uF

LN+5

C15

C14

470pF

0.1uF

167

12

X0

VCC

U2

VEE

LN+5

16

VCCVEE

U1

7

13

X

3

Y

10

A

9

B

GND

8

C21

0.1uF

13

X

3

Y

10

A

9

B

8

PATEMP

PTT_REQ_INV

PTT_REQ_EX

220nH

L11

220nH

L12

220nH

C16
100pF

L8

L9

220nH

C22
470pF

C65

100pF

3

U16

MC74HC00

14

X1

15

X2

11

X3

1

Y0

5

Y1

2

Y2

4

Y3

ENABLE*

6

12

X0

14

X1

15

X2

11

X3

1

Y0

5

Y1

2

Y2

4

Y3

ENABLE*6GND

L3

220nH

C63
100pF

L6

220nH

L7

220nH

C17
100pF

C18
100pF

C23
100pF

C66

100pF

4

6

U16

MC74HC00

100pF

5

C80

1

2

C19

100pF

L4

220nH

220nH

C24

100pF

LN+5 LN+5

R54
10K

L5

R55

C81

100pF

10K

X3MUX

Y3MUX

AMUXCTRL

BMUXCTRL

X2MUX
Y2MUX

PTT_REQ_SC
PTT_SWITCH

MAEPF-27076-O

Figure 17. PDR 3500 Schematic Sheet 1

68P81093C75-O January 31, 2001 11-3

HDLCCLK

J2

43

J5

VR10

VR11

VR33

43
31

J7

HDLCDATA

J2

41

J5

41
29

J7

HST_REQ

J7

50

J9

67

LINE1+

J6

1

J21

1

R56

3

J22

LINE1-

J6

2

J21

2

R57

4

J22

LINE2+

J6

7

J22

1

J21

3

LINE2-

J6

8
2

J22
J21

4

M10

LINEPTTDTGCC

J8

16

M8

MONDET-GCC

J8

20

M23

MUTE-PLSTRIP

J8

62

ODC1

75

J2
J7

75

M11

M6

M25

J8

J7
J9

J2
J5

J7
J9
J8

J20
J8

J8

60

59
77

40
40
28

55
49

8

24

63

PTT

REFAUDIO

RESET

RINGINDICATOR

RSSI-GCC

RSTAT-PAHINH

VR15

0

0

VR21

VR22

VR23

VR24

VR32

VR31 VR30

VR14

M22

M3

M15

M4

VR34

SW+5

A+

22

J2
J2

23

J2

24

J2

25

J2

26

J2

27

J2

28

J2

29
30

J2
J2

31

J2

32

J2

33

J2

34

J2

1

J2

2

J2

3
4

J2
J2

18

J2

19

J2

20

J2

21

J2

35

J2

36

J2

59
61

J2
J2

63

J2

64

J2

67

J2

68

J2

71

J2

72

J2

73

J2

79

J2

80

22

J5

23

J5

24

J5

25

J5

26

J5

27

J5

28

J5

29

J5

30

J5

31

J5

32

J5

33

J5

34

J5

J5

1

J5

2

J5

3
4

J5
J5

18

J5

19

J5

20

J5

21

J5

35

J5

36

J5

57
59

J5

J5

63

J5

64

J5

67

J5

68

J5

71

J5

72

J5

73
79

J5
J5

80

SW+5

A+

5

J7
J7

6

J7

7

J7

8

J7

9

J7

10

J7

11

J7

12
13

J7
J7

14

J7

15

J7

16

J7

17

J7

18

J7

19

J7

20
21

J7
J7

22

J7

49

J7

1

J7

2

J7

3

J7

4

J7

23
24

J7
J7

51

J7

52

J7

53

J7

54

J7

57

J7

58

J7

61
62

J7
J7

65

J7

66

J7

72

J7

73

J7

79

J7

80

A+

PTT_REQ_SC

SW+5

J8

SW+5

A+

5

J8
J8

6

J8

13

J8

14

J8

26

J8

27

J8

28

J8

29
30

J8
J8

31

J8

38

J8

45

J8

46

J8

47

J8

48

J8

55
65

J8
J8

66

J8

70

J8

71

J8

72

J8

73

J8

75

J8

77
79

J8

U10

2

58

NC1

DATA

1

NC2

GND

3

NC3

NC

3

J9
J9

5

J9

6

J9

7

J9

8

J9

9

J9

10

J9

11
12

J9
J9

48

J9

49

J9

20

J9

19

J9

44

J9

46

J9

45
47

J9
J9

66

J9

1

J9

2

J9

13

J9

14

J9

23

J9

24
29

J9
J9

30

J9

39

J9

40

J9

41

4

J9

50

5
6

J9

51

J9

68
69

J9
J9

71

J9

72

J9

73

J9

74

J9

75

J9

76

J9

79
80

J9

AMUXCTRL
BMUXCTRL

PATEMP
VFINALFORWARD
X2MUX

X3MUX
Y2MUX
Y3MUX

PTT_REQ_EX

38

J6
J6

53

J6

79

J6

80

M9

M17

M19

J20

9
5

J21

J22

6

J22

8

M16

M18

M20

LN+5

VR25

VR6

M14

VR26

5.6V

A0-CS1

A1-CS2

J22

J21

J21

J21

J8

J2
J5

J7

J2

J5
J7

J2
J5

J7

J2

J5
J7

J2
J5

J7

J2

J5
J7

J2
J7
J8

J20
J8
J20

J8

J6

J6

J6

J6

53
53
41

54

54
42

A2

62
62
47

A3

60

60
46

A4

58
58
45

A5

56

56
44
74

74
57

56

61

48

39

35

52

64

7

2

7

8

7

6

M24

AGC1

ASYNC+

ASYNC-

AUXCARRIER

EXTPTT+

EXTPTT-

RDSTAT-

RDSTAT+

CCI-MONITOR

VR28

VR18

M2

M7

VR27

M1

VR29

VR8

VR9

VR17

VR19

VR20

CTS1

52

J8
J20

6

DATA*1

78

J2
J7

78

DATA1

J2

77

J7

77

DATAPTT-GCC

J8

21

DATARX-GCC

J8

22

DATATX-GCC

23

J8

DCD1

J8

54

J20

1

EXTSPARE#1

J2

5
5

J5

EXTSPARE#10

J2

14

J5

14

EXTSPARE#11

15

J2
J5

15

EXTSPARE#12

J2

16

J5

16

EXTSPARE#2

J2

6
6

J5

EXTSPARE#3

J2

7

J5

7

EXTSPARE#4

8

J2
J5

8

EXTSPARE#5

J2

9

J5

9

EXTSPARE#6

J2

10
10

J5

EXTSPARE#7

J2

11

J5

11

EXTSPARE#8

12

J2
J5

12

EXTSPARE#9

J2

13

J5

13

HDLCBUSY

J2

42
42

J5
J7

30

J8

J20

J2
J5
J7

J2
J5
J8

J8

J20

J8

J8

J2
J7

J8

J2
J5

J7
J9

J2
J5
J7

J9
J2
J5

J7
J9

J2
J5
J7

J9
J2
J5

J7
J9

53

4
65

65
55
17

17
68

50

3

19

25

76

76
17

47
47

35
56
48

48
36

57
49
49

37
58
50

50
38

60
51
51

39
61

RTS1

RX16.8MHZREF

RXAUDIO

RXD1

RXMUTE-GCC

RXPLDET

SBI1

SEIZERELSEGC

SPARE#1

SPARE#2

SPARE#3

SPARE#4

SPARE#5

VR37

VR40

VR38

VR39

M21

TXDATA-

J8

69

VR12

VR36

VR13

M12

J2

J5
J7
J9

SPICLK

J2
J5

J7
J9

J7
J9

SPIMISO

J2
J5
J7

J9

SPIMOSI

J2
J5
J7

J9
J2
J5

J7
J2

J5
J7
J2

J5
J7

J8

J5

J7
J9
J8

J20

J8

52
52

40
62

39
39

27
54
43

59

37
37
25

52

38

38
26

53
46
46

34
45
45

33

TDMFRAMESYNC

44

44
32

TSTAT-RXCAIE

59

TX16.8MHZREF

66
56

70
51

5

TXDATA+_TXAIO

67

M13

SPARE#6

SPIGRANT

TDMCLOCK

TDMDATA

TXD1

M5

TXPLINHITGCC

J8

15

TXWIDEBANDAIO

J2

69

J5

69

J7

63

VCOAUDIO

60

J7
J9

78

VCONTROL

J9

15

J9

16

J9

17

J9

18

XMITSPIREQ

J7

48
65

J9

A+ LN+5

MC78M05ACDT

1

C50
330UF 330UF

A+

C48

330UF

330UF

RESET_SWITCH

A+

C3
470pF

VR16

VR41

3

U14

2

C8

C9

470pF

C4
10uF

9.6V

4

GND
4

U3

U5

11

14

7

C73

0.1uF

8

MC74HC00

11

MC74HC00

6

BOOST

U6

TAB VC
8

OUT

ADJ
TAB
6

U16

U16

SENSE

1

470pF

VSW

1

2

C5

C26

0.1uF

C30

0.1uF

C74

470pF

C11

1500pF

POWER

VR42

VR43

POWER POWER

9.6V

4

POWER

U15

11

C51

5

IN

2

SHDN*

C77

100pF

5

IN

U7

4

SHDN*

GND
3

9

10

12

13

3

7

LN+5

POWER

U16

C27

470pF

C31

470pF

14

7

C10

0.27uF

R7

10.5K
1%

13
12

POWER

U15

MC33074

D1

L1

4.7UH

VR1

SCHOTTKY
MBRS330T3

R8

16.2K
1%

LN+5

14

C28

U4

0.1uF

7

LN+5LN+5

14

C32

0.1uF

U9

7

11

MC74HC86

C76

C75

470pF

0.1uF

6

MC74HC32A

SW+5

8

MC74HC32A

11

MC74HC32A

C13
470pF

9.6V

C6
10uF

14

C12
330UF 330UF

C29
470pF

C33
470pF

U5

12

13

U9

4

5

U9

9

10

U9

12

13

C49

C7
470pF

MAEPF-27077-O

Figure 18. PDR 3500 Schematic Sheet 2

11-4 January 31, 2001 68P81093C75-O

Ω

Electrical Parts List : Backplane Circuit Board

Reference

C1 2113741B69 0.1uF
C2, C3 2113740F67 470
C4 2311049A19 10 uF
C5 2113740F67 470
C6 2311049A19 10uF
C7 2113740F67 470
C8 2313748R01 330uF
C9 2113740F67 470
C10 2113743B22 0.27uF
C11 2113741F29 1500
C12 2313748R01 330uF
C13 2113740F67 470
C14 2113741B69 0.1uF
C15 2113740F67 470
C16 thru C19 2113741F01 100
C21 2113741B69 0.1uF
C22 2113740F67 470
C23, C24 2113741F01 100
C26 2113741B69 0.1uF
C27 2113740F67 470
C28 2113741B69 0.1uF
C29 2113740F67 470
C30 2113741B69 0.1uF
C31 2113740F67 470
C32 2113741B69 0.1uF
C33 2113740F67 470
C34 2113741B69 0.1uF
C35 thru C37 2113740F67 470
C38 2113741B69 0.1uF
C39 2113740F67 470
C40, C41 2113741F01 100
C42 2113740F67 470
C43 2113741D28 0.22uF
C44, C45 2113740F67 470
C46 2113741B69 0.1uF
C47 2113740F67 470
C48 thru C51 2313748R01 330uF
C52 thru C54 2113740F31 15
C55 thru C59 2113740F41 39

Motorola Part

Number

Description

CAPACITOR, Fixed:
pF±5%; 50V Unless

otherwise stated

Electrical Parts List : Backplane Circuit Board

Reference

C60 2113741F01 100
C61, C62 2113740F67 470
C63 2113741F01 100
C64 2113741D28 0.22uF
C65 thru C72 2113741F01 100
C73 2113741B69 0.1uF
C74 2113740F67 470
C75 2113741B69 0.1uF
C76 2113740F67 470
C77 2113741F01 100
C80 2113741F01 100
C81 2113928E01 1uF
C82 2113741F01 100

D1 4805129M76 Silicon
D2 4813833A12 Silicon

J2 0982407W01 connector, 80-pin
J5 thru J9 0982407W01 connector, 80-pin
J20 2880007R05 connector, 10-pin
J21, J22 0960113B01 connector, RJ-45

L1 2485721C01 4.7uH
L2 thru L13 2462587T19 220nH

P1 thru P4 2985762C01 terminal, power
P5 2884324M08 header, 3-pin
P6, P7 2985762C01 terminal, power
P8 2884324M09 header, 4-pin
P9 2884324M10 header, 5-pin
P10 2885761C01 connector, 12-pin

Q1 thru Q4 4813821A47 mosfet
Q5 4813823A13 mosfet_gsd

Motorola Part

Number

Description

DIODE: See Note.

JACK:

COIL, RF: unless

otherwise stated

PLUG:

TRANSISTOR: See

Note.

Electrical Parts List : Backplane Circuit Board

Reference

R1 0662057P22 22.1k; 1%
R2 0662057P10 10k; 1%
R3 0662057P66 5.62k; 1%
R4 0662057P22 22.1k; 1%
R5 0662057Z35 11.5k; 1%
R6 0662057A49 1k
R7 0662057P12 10.5k; 1%
R8 0662057P16 16.2k; 1%
R9 0662057A73 10K
R10 0662057P66 5.62k; 1%
R11 0662057Y16 32.4k; 1%
R12 0662057P16 16.2k; 1%
R13 0662057P66 5.62k; 1%
R14 0662057A25 100
R16 0662057A39 390
R17, R18 0662057P20 20k; 1%
R19 0662057P18 18.2k; 1%
R20 0662057P10 10k; 1%
R21 0662057P16 16.2k; 1%
R22 0662057P12 10.5k; 1%
R24 0662057T73 33.2k; 1%
R25 thru R27 0662057B47 0
R28 0662057A49 1k
R31 0662057A73 10k
R32 0662057P66 5.62k; 1%
R33 0662057Z26 22.6k; 1%
R34 thru R36 0662057P10 10k; 1%
R37 0662057P12 10.5k; 1%
R38 0662057P10 10k; 1%
R39 0662057P18 18.2k; 1%
R40 0662057P16 16.2k; 1%
R41 0662057P12 10.5k; 1%
R42 thru R44 0662057A80 20k
R45 0662057A73 10K
R46 thru R48 0662057P10 10k; 1%
R49 0662057P12 10.5k; 1%
R50 0662057A77 15k
R51 0662057A73 10k
R52 0662057A68 6.2k

Motorola Part

Number

Description

RESISTOR, Fixed:

±5%; 1/8W unless

otherwise stated

Electrical Parts List : Backplane Circuit Board

Reference

R54
R55 0662057A80 20k
R56, R57 0662057B47 0
R59 0662057A25 100
R60 0662057A73 10k
R61 0662057A63 3.9k
R62 0662057A73 10k

S1 4080564C02 dip

U1, U2
U3 5113819A05 Op-amp, quad
U4 5113805A13 OR gate, quad
U5 5113805A22 XOR gate, quad
U6 5185130C93 Regulator, switching
U7 5105109Z13 Regulator, linear
U8 5185368C03 A/D converter
U9 5113805A13 OR gate, quad
U10 5185130C99 Silicon serial

U11 thru U13 5113805A84 multiplexer
U14 5113816A53 Regulator, 5V
U15 5113819A05 Op-amp, quad
U16 5113805A27 NAND Schmitt trigger

VR1 4813833B02 Zener
VR2 4813830A73 Zener, 2.8V
VR5 4813830A73 Zener, 2.8V
VR6 4813830A15 Zener, 5.6V
VR8 thru VR43 4813830A71 Zener, 15V

NOTE:
For optimum performance, order replacement diodes,
transistors, and cir cuit modules by Motorola part num­ber only.

Motorola Part

Number

0662057A73 10k

5113805A84 multiplexer

Description

SWITCH:

MODULE:

number

DIODE: See Note.

68P81093C75-O January 31, 2001 11-5

1

VIEWED FROM SIDE 1

80

78

79

77

56

58

J7

55

57

4

2

3

1

80

78

79

77

1

3

2

4

56

58

J8

55

57

57

J6

55

58

56

4

2

3

1

77

79

78

80

1

3

2

4

1

3

2

4

57

55

J5

58

56

57

55

J2

58

56

77

79

78

80

77

79

78

80

VR38

VR18

VR25

M24

VR26

M22

VR29
M1

M14
M13

VR40

VR30

VR34

VR39

VR36

J21

U10

VR37

M3

M9

VR41
M19

M20

VR42

M17

M15

M18

M21

VR32

M23

VR15

M25

VR43

M5

M7

M11
M12

M10

M8

M6

M4

M2

VR27

80

78

79

77

M16

VR28

VR33

VR31

VR21

VR19VR20

R56
R57

R1
R3

C80
R54

C81

J9

J22

VR22

VR6

VR17

C1

C2

20

1

R2
R4

U8

11

10

C75

C76

1

14

R60

U16

R55

D

7

8

G

S

D

S

G

R61

24

26

23

25

C32

VR23

1

14

C33

U9

VR24

7

8

C29

C52
C53
C54

C55
C56

Q4

R62

Q5

C28

1

14

C58

U4

C57

7

8

C31

C30

1

14

U5

C59

7

8

P8

4

2

3

1

R12

R13

C14

C15

C17

1

L7

16

C16

C43

C23

L5

C24

J20

L6

U2

9

8

L8

C18

L9

C19

C21

C22

161

U1

C63

C64

9

8

L3

C65

L4

VR14

R40

L11

L12

R41

C66

C27

C26

R46

VR8

VR11

VR16

1

9

2

10

VR9

VR10

R39

VR13

R26

1

8

8

R38

C69

R47

VR12

C60

R45

R27

R28

U11

U13

1

U3

7

C72

R48

L2

R50

R52

C34

16

9
C36
C47

161

C44

9

C61

R36

R37

R34

14

C70
C71

8

R49

R44

C35

1

14

R51

R24

C67

R11

U15

R10

R25
C37

C46

L10

C62

R35
R21

R22

R19

R31

R17

C74

78

R5

C73

C41

U12

C40

8

S1

BLU

2
1

C68

R18

R6

R16

C39

C38

161

L13

C82

R32

R33

9

C45

C42

R42

R43

P4

P3

RED

12

P10

11

C13

7

D1

U6

VR2

VR5

VR1

D2

BLK

P2

P7

P6

C10

C9

1

C77

C11

C6

C7

1

R7

P1

WHT

P5

U7

R8

C5

C3

5

C4

C50

C12

L1

C49

C8

C48

U14

C51

Q1

Q2

G

S

R14

G

D

S

D

P9

G

D

R9

S

Q3

R59

MAEPF-27078-O

Figure 19. PDR 3500 Backplane Circuit Board Detail

11-6 January 31, 2001 68P81093C75-O

Mechanical Parts List: PLN1681A Main Chassis

Part Number Description Qty Where Used

0200001355
0200835638 Nut, elastic 4-40 4 AC receptacle and DC connector
0200844628 Nut, elastic 6-32 8 Fans
0300139392 Screw, 1/4-20 4 Handle
0300139800 Screw, 6-32 x .5 4 Preselector
0307644M09 Screw 10-32 x .75 8 Chassis to case
0307644M12 Screw 10-32 x .375 20 PA, backplane board, receiver and exciter brackets
0307644M28 Screw 4-40 x .437 6 RSS connector, DC connector, AC receptacle
0310907C83 Screw., M3 x .05 x 8 2 Receiver bracket.
0311995A17 Screw, 6-32 x 1 8 Fans
0385865C01 Screw, 8-32 x .250 4 Power supply
0385865C02 Screw, 8-32 x .312 8 Duplexer and duplexer cover
0400002645 Washer, lock #6 ext. 4 Preselector
0400002646 Washer, lock #8 int 2 Ground stud
0400007652 Washer, lock #10 ext 6 Backplane board
0400119331 Washer, split lock 4 Handle
0400490775 Washer, flat #6 2 Preselector
0407643M01 Washer, flat #10 8 Chassis to case
0485061D01 Spacer 2 Spacer for panel RF connectors
0705723V01 Clip, PA 1
0785688C01 Bracket, receiver 1
0785689C01 Bracket, exciter 1
1505432W01 Cover, PA 1
1585693C01 Cover, duplexer 1
2785687C01 Chassis 1
2800048250 Adapter, right angle UHF 2 On TX and RX port
2885828C01 AC Receptacle w/ fuse holder 1
3082933N02 Line cord 1
3085697C01 Coax cable, Exciter to PA 1
3085698C01 Cable, ribbon RSS 1
3085699C01 Cable, ribbon PA 1
3085700C01 Cable, PA power 1 PA to backplane board
3085701C01 Cable, DC power 1
3085702C01 Coax cable, PA to top panel 1
3085702C02 Coax cable, receiver to top panel 1
3085703C01 Wire, brown 1 Power supply to AC receptacle
3085703C02 Wire, orange 1 Power supply to AC receptacle
3085703C03 Wire, green/yellow 1 Chassis to AC inlet
3085703C04 Wire, black 1 Power supply to backplane board
3085703C05 Wire, white 1 Power supply to backplane board
3085703C06 Wire, green/yellow 1 Chassis to power supply
3085786C01 Coax cable, Duplexer to RX port 1
3085786C02 Coax cable, Duplexer to TX port 1
4085732C01 Assembly, PTT/LED 1
4385800C01 Standoff, hex 2 Preselector
4685799C01 Card guides 2
5507519M04 Handles 2
5882273C01 Adapter, N antenna 1 On duplexer
5985731C01 Fan assembly 2
6500139837 Fuse, 3A 250V 2
7505658W01 Thermal pad, PA 1
7582200H01 Pad, gray 6
7582200H14 Pad, black 8
7585798C01 Feet, rubber 4

Nut, 8-32 hex 2 Chassis ground stud

68P81093C75-O January 31, 2001 11-7

*6881093C75*

68P81093C75-O

4

Motorola
8000 West Sunrise Boulevard
Fort Lauderdale, Florida 33322