Motorola 92FT3800 User Manual

PDR 3500

Portable Repeater

Basic Service Manual

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Commercial, Government, Industrial Solutions Sector

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

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

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

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

Connecting PC to

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

iii

List of Tables

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

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

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

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

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

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

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

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

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

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

List of Figures

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

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

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

Figure 4. PDR 3500 Station Troubleshooting Overview

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Foreword

General

Safety Information

Manual Revisions

Computer Software

Copyrights

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

Before operating a PDR 3500 station, 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 September 27, 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: 1-847-538-8198 FAX: 1-410-712-4991 (Federal Government) Domestic (U. S. A.) after hours or weekends: 1-800-925-4357 International: 1-847-538-8023

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

Safety Information

General

Safe and Efﬁcient

Operation of

Motorola T wo-way

Radios

RF Operational

Characteristics

This section contains important information on safe and efﬁcient operation. Read this information before using your radio.

The information provided in this document supersedes the general safety information contained in user guides published prior to July

2000. For information regarding radio use in a hazardous atmosphere please refer to the Factory Mutual (FM) Approval Manual Supplement or Instruction Card, which is included with radio models that offer this capability.

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

Exposure to Radio

Frequency Energy

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

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

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

Institute of Electrical and Electronic Engineers (IEEE) C95.11999 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

68P81093C75-O September 27, 2000 2-1

•

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

Electromagnetic Interference/ Compatibility

Facilities

Aircraft

Medical Devices

NOTE: Nearly every electronic device is

susceptible to electromagnetic interference (EMI) if inadequately shielded, designed or otherwise conﬁgured for electromagnetic compatibility.

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.

When instructed to do so, turn off your radio when on board an aircraft. Any use of a radio must be in accordance with applicable regulations per airline crew instructions.

• Pacemakers

The Health Industry Manufacturers Association recommends that a minimum separation of 6 inches (15 cm) be maintained between a handheld wireless radio and a pacemaker. These recommendations are consistent with the independent research by, and recommendations of, Wireless Technology Research.

Persons with pacemakers should:

ALWAYS keep the radio more than 6 inches (15 cm) from their pacemaker when the radio is turned ON.

not carry the radio in the breast pocket. use the ear opposite the pacemaker to minimize the potential for

interference. turn the radio OFF immediately if you have any reason to

suspect that interference is taking place.

• Hearing Aids

Some digital wireless radios may interfere with some hearing aids. In the event of such interference, you may want to consult your hearing aid manufacturer to discuss alternatives.

• Other Medical Devices

If you use any other personal medical device, consult the manufacturer of your device to determine if it is adequately shielded from RF energy. Your physician may be able to assist you in obtaining this information.

2-2 September 27, 2000 68P81093C75-O

•

Operational Warnings

WARNING: Do not place a portable radio in the area over an air bag or in the air bag deployment area. Air bags inﬂate with great f orce. If a portable radio is placed in the air bag deploy-

ment area and the air bag inﬂates, the radio may be propelled with great force and cause serious injury to occupants of the vehicle.

WARNING: Turn off your radio prior to entering any area with a potentially explosive atmosphere, unless it is a radio type especially qualiﬁed for use in such areas as “Intrinsically

Safe” (for example, Factory Mutual, CSA, or UL Approved). Do not remove, install, or charge batteries in such areas. Sparks in a potentially explosive atmosphere can cause an explosion or ﬁre resulting in bodily injury or even death.

NOTE:

The areas with potentially explosive atmospheres referred to above include fueling areas such as below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles, such as grain, dust or metal powders, and any other area where you would normally be advised to turn off your vehicle engine. Areas with potentially explosive atmospheres are often but not always posted.

WARNING: To avoid possible interference with blasting operations, turn off your radio when you are near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-wa y

radio.” Obey all signs and instructions.

Vehicles with an air bag

Potentially explosive atmospheres

Blasting caps and areas

Operational Cautions

CAUTION: Do not use any portable radio that has a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn can result.

CAUTION: All batteries can cause property damage and/or bodily injury such as burns if a conductive material such as jewelry, keys, or beaded chains touch exposed terminals. The

conductive material may complete an electrical circuit (short circuit) and become quite hot. Exercise care in handling any charged battery, particularly when placing it inside a pocket, purse, or other container with metal objects.

Mobile Radio Operation

and EME Exposure

Damaged antennas

Batteries

To assure optimal radio performance and that human exposure to radio frequency electromagnetic energy is within the guidelines referenced earlier in this document, transmit only when people outside the vehicle are at least the minimum distance away from a properly installed, externally-mounted antenna.

68P81093C75-O September 27, 2000 2-3

•

The table below lists the minimum distance for several different ranges of rated radio power.

Table 1: Rated Power and Distance

Antenna Installation

Rated Power of Vehicle-Installed

Mobile Tw o-Way Radio

7 to 15 Watts 16 to 50 Watts 2 Feet (61 Centimeters) More than 50 Watts 3 Feet (91.5 Centimeters)

Minimum Distance from

Transmitting Antenna

1 Foot (30.5 Centimeters)

Mobile Antennas

Recommended mobile antenna installations are limited to metal body vehicles at the center of the roof and center of the trunk deck locations.

The antenna installation must additionally be in accordance with:

a. The requirements of the antenna manufacturer/supplier

b. Instructions in the Radio Installation Manual

Fixed Site Antennas

Mobile radio equipment is sometimes installed at a ﬁxed location and operated as a control station or as a ﬁxed unit. In such cases the antenna installation must comply with the following requirements in order to assure optimal performance and make sure human exposure to radio frequency electromagnetic energy is within the guidelines set forth in the above standards.

The antenna must be mounted outside the building. Mount the antenna on a tower if at all possible. If the antenna is to be mounted on a building then it must be

mounted on the roof. As with all ﬁxed site antenna installations, it is the responsibility

of the licensee to manage the site in accordance with applicable regulatory requirements and may require additional compliance actions such as site survey measurements, signage, and site access restrictions in order to insure that exposure limits are not exceeded.

2-4 September 27, 2000 68P81093C75-O

Introduction

General

Compact Mechanical

Design

State-of-the-Art

Electrical Design

The Motorola PDR 3500 Station provides conventional analog,

ASTRO™ , ASTRO CAI™ , and SECURENET™ capabilities in a

compact, software-controlled design. The station architecture and microprocessor-controlled Station Control Module allow for fast and reliable upgrading. FLASH memory in the Station Control Module allows software updates to be performed locally (using serial port), or remotely via modem.

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 The station receive circuitry features multiple bandwidth capability

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

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.

(12.5, 25, or 30 kHz, depending on band), as well as ASTR O 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.

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 September 27, 2000 3-1

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

interfaces, including analog, ASTRO, ASTRO CAI, SECURENET, Tone Remote Control, and DC Remote Control. Telephone line connections are easily made to the wireline circuitry via connectors on the top panel.

Switching Power Supply

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

Standard Features • Compact single case design

• Extensive Self-Test Diagnostics and Alarm Reporting

• FRU maintenance philosophy

• Easily programmed via Radio Service Software

• Local or Remote Software downloading to FLASH memory

• Upgrades performed by module replacement and/or software

upgrade

• Compatible (with appropriate options) with analog,

SECURENET, ASTRO, and ASTRO CAI digital signaling

• Versatile and reliable switching-type power supply

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

+140˚ F)

Optional Hardware Features

3-2 September 27, 2000 68P81093C75-O

• 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.

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.

Two Antenna

Operation

The PDR 3500 Portable Digital Repeater may be operated with the internal duplexer , using a single antenna. The duplex er pro vides the necessary electrical isolation between the transmitter and the receiver frequencies for repeater operation. The same isolation can be obtained by physically separating transmit and receive antennas either horizontally or vertically . The repeater requires approximately 50 dB isolation between the transmit and receive antennas for proper operation.

Horizontal Antenna Separation:

VHF Band 275 feet UHF Band 75 feet 800 MHz Band 40 feet

The Isolation values shown are for dipole antennas. If gain antennas are used, additional separation is required. For example, if both receive and transmit antennas have 3dB gain each, an additional 6 dB isolation is required. At UHF frequencies, an additional 75 feet separation is required.

Vertical Antenna Separation

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

VHF Band 23 feet UHF Band 9.5 feet 800 MHz Band 4 feet

68P81093C75-O September 27, 2000 4-1

Gain antennas do not effect the transmit-to-receive antenna separation required. Gain antennas are longer than unity gain antennas.Therefore additional tower height will be required to maintain the tip-to-base separation.

The antenna isolation distances shown above are based upon ideal conditions. The antenna-to-antenna coupling is affected by nearby objects that may result in increased separation required for proper operation.The antenna coax cable must be a double-shielded type to minimize cable-to-cable coupling. If RG58 style cables have to be used, keep the cables as far apart as possible to minimize cable coupling.

External Duplexer Operation

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

4-2 September 27, 2000 68P81093C75-O

Models and Speciﬁcations 5

Model Chart

Table 2: Model Structure

Model Description

P2066A 132-154 MHz

P2067A 150-174 MHz

P2068A 403-433 MHz

P2069A 438-470 MHz

P2070A 470-494 MHz

P2071A 494-512 MHz

Kit Description

X PLD1177_ Receiver VHF R1 X PLD1178_ Exciter VHF R2

X PLD1179_ Receiver VHF R2 X PLD1180_ Exciter VHF R2

X PLE1254 Receiver UHF R1 X PLE1255 Exciter UHF R1

X PLE1256 Receiver UHF R2 X PLE1257 Exciter UHF R2

X PLE1258 Receiver UHF R3 X PLE1259 Exciter UHF R3

X PLE1260 Receiver UHF R4

X PLE1261 Exciter UHF R4 XXXXXXPLN1682_ Board, Control X X X X X X PLN1681_ Chassis, main XXXXXXPLN7776_ Case, portable X X X X X X PLN7777_ Board, backplane XXXXXXPPN6026_ Power supply X X PLD7981_ P A, VHF

X PLE9367_ PA, UHF R1

X X PLE9369_ PA, UHF R3

X PLE9372_ PA, UHF R4 X X PFD6060_ Duplexer, VHF

XXXXPFE6060A Duplexer, UHF X X X X X X PAN6003A Antenna, mag mount XXXXXXPDR7778A Label X X X X X X PBN6048A Packing

x = Indicates one of each is required.

68P81093C75-O September 27, 2000 5-1

Table 3: Options

OPTION DESIGNATOR DESCRIPTION PURPOSE

Q245AL Add: Duplexer, VHF Adds VHF duplexer. Requires customer frequency. Q245AM Add: Duplexer, UHF Adds UHF duplexer. Requires customer frequency. H338AC Add: Transit Case Adds a transit case for increased protection during transport.

Maintenance Speciﬁcations

The following are the PDR 3500 speciﬁcations for analog as measured per the revised EIA/TIA 603 Standards and for digital as measured per TIA TSB-102.CAAB:

Table 4: Speciﬁcations

GENERAL VHF UHF

Standard model numbers P2066A, P2067A P2068A, P2069A, P2070A, P2071A Channel spacing 12.5, 25, 30 kHz 12.5, 25 kHz Stability 0.0001% 0.0001% Preselector bandwidth (3dB) 7 MHz 7 MHz Squelch Carrier, PL, DPL Carrier, PL, DPL Number of modes 1 1

TRANSMITTER VHF UHF

RF power (without duplexer) 30 watts 30 watts RF power (with duplexer) 20 watts 20 watts Maximum transmit duty cycle 50% 50% TX spurs/harmonics -60 dB -60 dB FM noise (EIA) -45 dB nominal -45 dB nominal Audio response per EIA per EIA TX distortion (1 kHz, clear audio) <5% <5%

RECEIVER VHF UHF

Sensitivity (20dBQ) 0.35 uV 0.5 uV Sensitivity (12dB SINAD) 0.25 uV 0.35 uV Selectivity (EIA SINAD) 85 dB (25/30 kHz) 85 dB (25 kHz)

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

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

75 dB (12.5 kHz)

Spurious and image 80 dB 80 dB

Note: Speciﬁcations are subject to change without notice.

5-2 September 27, 2000 68P81093C75-O

75 dB

Table 5: Speciﬁcations, continued

DUPLEXER

Repeat frequency spread, TX/TX: 300 kHz VHF minimum duplexer T-R separation 3 MHz: 132-174 MHz UHF minimum duplexer T-R separation 3 MHz: 403-520 MHz

AC power voltage range: 80-265 Vac AC power frequency input: 49-61 Hz External DC power: 11-16 Vdc

CURRENT DRAIN

High power repeat: 10.0 A Standby: 1.9 A

DIMENSIONS

Size (English): 20.00 x 15 x 7.75 inches Size (metric): 508 X 381 X 197 mm

WEIGHT

Weight (English): 41 lbs Weight (metric): 18.6 kg

Note: Speciﬁcations are subject to change without notice.

68P81093C75-O August 18, 2000 5-3

Notes

5-4 September 27, 2000 68P81093C75-O

Approved Accessories 6

General The following accessories are recommended by Motorola for use

with the PDR 3500 Portable Repeater.

Antenna One of the following antennas should be used:

• The magnetic-mount whip antenna (Motorola part number

PAN6003A) shipped with the PDR 3500.

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

manufacturer’s instructions enclosed with the antenna.

• An aftermarket antenna which meets these requirements:

- Monopole

- Unity gain

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

- Minimum input power rating of 60W continuous

- VSWR of 1.5:1 or less

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

TXD

RXD

3 4

GND

5 6

RTS

CTS

8 9

Connects

to RSS Port

on Top Panel

MAEPF-27075-O

Figure 1. EIA-232 Wiring Diagram

68P81093C75-O September 27, 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 September 27, 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 September 27, 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 September 27, 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 September 27, 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). Please refer to the Antenna Spacing Chart on page 4-1 in this manual.

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

transmit and receive.

1. Connect the UHF connector labeled “RX” on the station top panel, to the N-type connector labeled “RX” on the duplexer.

2. Connect the top panel UHF connector, labeled “TX,” to the Ntype connector labeled “TX” on the duplexer .

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

7-6 September 27, 2000 68P81093C75-O

Operation 8

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

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

Summary of Switches, Pushbuttons, and Connectors

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 6 Switches, Pushbuttons, and Connectors

Top Panel

Wireline connectors Transmit UHF connector RSS port connector Receive UHF connector DC connector AC connector Momentary PTT/Reset switch

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 7 Summary of LED Indicators

Top Panel Station Control Module

Power/Transmit LED Station On

Station Fail Intcm/Acc D Control Ch Rx 1 Active Rx2 Active Rx Fail Aux LED

68P81093C75-O September 27, 2000 8-1

Duplexer

Wireline

Connections

(RJ-45)

Antenna

Receive

UHF Jack

Transmit

UHF Jack

MAEPF-27065-O

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

Table 8 Switches, Pushbuttons, and LED Indicators

Item Name Purpose

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

RSS software. Performs station alignment, optimization, and diagnostics. Requires Null Modem Cable (Motorola part

number 30-80369E31). B DC Connector External DC source (+12 Vdc) C AC Connector and Fuses AC Inlet (110/220 Vac, 3 A) D Power/Transmit LED The function of this LED indicator is described in the Trou-

bleshooting section of this manual. E Momentary PTT/Reset Switch When set to “PTT,” its purpose is to test the station. When

set to “RESET,” its purpose is to reset the station. F Control Module Status LEDs The function of these LED indicators is described in the

Troubleshooting section of this manual.

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

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

Rx Fail; Aux LED.

8-2 September 27, 2000 68P81093C75-O

Troubleshooting 9

Introduction This section provides troubleshooting recommendations and

procedures for the PDR 3500 station 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 station and ancillary equipment:

Test Equipment List • Motorola R2001 or R2600 Series

Communications Analyzer (or equivalent)

• PC with RSS program

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

equivalent)

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

• Handset/Microphone with PTT switch

(TMN6164, or equivalent)

Troubleshooting Procedures

68P81093C75-O September 27, 2000 9-1

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

Many of the troubleshooting procedures require the use of the Motorola-supplied Radio Service Software (RSS) since the PDR 3500 station is computer-controlled, employing state-of-the-art signal processing. The RSS operates on a PC (or compatible), with RS-232 communication port capability. The RSS allows the technician to access alarm logs, run diagnostics, and set up the equipment for various audio and RF tests. Complete details on the operation of the RSS are provided in the RSS User’ s Guide (manual number 68P81085E35).

Troubleshooting Overview

Introduction Two procedures are provided for troubleshooting the PDR 3500

station and ancillary equipment. Each procedure is designed to quickly identify faulty modules, and replace them with known working modules.

Procedure 1: Routine Maintenance Functional Checkout

Procedure 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 station equipment.

Step 1. Select the appropriate troubleshooting procedure ﬂow

chart (Procedure 1 or Procedure 2).

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

additional explanation are marked with page references.

• Locate the additional information

• Perform the tasks (if any)

• Return to the ﬂow chart

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

Module Replacement Procedures, beginning on page 25.

9-2 September 27, 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?

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?

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

• USING RSS, RUN DIAGNOSTICS ON STATION MODULES

YES

GO TO TROUBLESHOO TING PROCEDURE 2 FLOW CHART

MODULE

SUSPECTED

OF BEING

FAULTY?

DONE

YES

GO TO TROUBLESHOO TING PROCEDURE 2 FLOW CHART

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

68P81093C75-O September 27, 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?

MODULE

SUSPECTED

OF BEING

FAULTY?

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

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

MODULE

SUSPECTED

OF BEING

FAULTY?

GO TO

YES

GO TO MODULE REPLACEMENT PROCEDURES ON page 25

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

9-4 September 27, 2000 68P81093C75-O

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?

RUN TRANSMITTER AND RECEIVER TESTS:

• PERFORM VERIFYING TRANSMITTER CIRCUITR Y

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

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 Station Troubleshooting Overview (Procedure 2: Reported or Suspected Problem) (Continued)

68P81093C75-O September 27, 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 9.

Table 9: PDR 3500 Station 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

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

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

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

– OFF when:

PA not keyed

PA keyed, but PA output power is not at expected power level (as set by technician via RSS during station alignment)

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

expected power level (as set by technician via RSS during station alignment) but not shut down (for example, during power cutback mode)

– OFF when:

EXCITER MODULE

PA Fail – RED when:

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

PA not keyed

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 September 27, 2000 68P81093C75-O

Table 9: PDR 3500 Station 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 September 27, 2000 9-7

9-8 September 27, 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 September 27, 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 September 27, 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 September 27, 2000 9-11

Antenna

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

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

Duplexer or

Antenna Relay

Antenna Port

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

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

out to select antenna rf input.

MAEPF-27032-O

Figure 6 Test Equipment Setup for Verifying Transmitter Circuitry

9-12 September 27, 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 September 27, 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 T ransmitter Circuitry

test procedure. If all displays and measurements are correct, the transmitter circuitry may be considered to be operating properly.

9-14 September 27, 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 September 27, 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 September 27, 2000 68P81093C75-O

Disconnect cables from top panel transmit and

receive ports.

Antenna

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

(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

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

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 September 27, 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 September 27, 2000 68P81093C75-O

Duplexer

PDR 3500

Top Panel

PDR 3500 Top Panel

Capacitive

Coupler

(Isolated T)

RF SECTION

RF Output

RF SECTION

COMMUNICATIONS SYSTEM ANALYZER

789 456 1023

OSCILLOSCOPE

R2001 Communications

MAEPF-27035-O

789 456 1023

OSCILLOSCOPE

Motorola Analyzer

Dummy

Load

MONITOR

Duplexer

RF Output

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 September 27, 2000 9-19

Station Control

Module

Press and hold

Shift Button.

Intcm/Acc D LED

should Flash yellow.

Press Vol Down/

Access Disable

Exciter

Module

Figure 9 Disabling the Transmitter

PA Full LED should

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 September 27, 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 September 27, 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 September 27, 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 September 27, 2000 9-23

Power

Supply

AC Jack

SwitchLED

Motherboard

Terminal

Tabs

J20 P10

RSS

Fan Fan

MAEPF-27080-O

Receiver

Exciter

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 P ower 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 cab le 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 September 27, 2000 68P81093C75-O

AC Inlet

(Viewed from

Underside)

Power Supply

Output Input

Pos

Neg

BROWN

ORANGE

Nuts

Ring Lugs

Chassis

Ground Stud

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 September 27, 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 f aulty 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 September 27, 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 September 27, 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.

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 September 27, 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 September 27, 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.

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 September 27, 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 September 27, 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 September 27, 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 September 27, 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 10.

Table 10 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 Wireline Module until they disengage from their respective backplane connectors. The modules need not be completely removed from the chassis.

5. On the back of the chassis, remove the six Phillips screws holding the backplane in place.

6. Slowly, but ﬁrmly, pull the bottom edge of the backplane away from the chassis. Continue pulling until the 80-pin card edge connectors dislodge from the Receiver and Exciter modules. Then pull the backplane down and away from the top panel of the chassis.

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

8. If the dip switches on the new backplane have not been set to match the PA/Exciter combination of the station, set them now according to Table 10.

9-34 September 27, 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 September 27, 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 September 27, 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

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 September 27, 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.

Preselector

Assembly

To Dip/Peak

Monitor

(RF Millivoltmeter

or Power Meter)

Tension Nut

Tuning Screw

Tuning

Probe

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 frequency calculated

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

9-38 September 27, 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

H4 H5

Receiver

Board

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 September 27, 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

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 September 27, 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.

Preselector

Assembly

To RX

Connector

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 frequency calculated

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

68P81093C75-O September 27, 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

Station Receive

TUNING SCREW 2

TUNING SCREW 3

TUNING SCREW 4

Receiver

Antenna Port

Board

MAEPF-27041-O

Figure 15 Location of Tuning Screws and Cavity Probe Holes

9-42 September 27, 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 September 27, 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 September 27, 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 Interf ace 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 September 27, 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 September 27, 2000 68P81093C75-O

Motorola 92FT3800 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Tables

List of Figures

Foreword

General

Safety Information

Manual Revisions

Parts Ordering

Motorola Parts

Related Documents

Safety Information

General

Electromagnetic Interference/ Compatibility

Facilities

Aircraft

Medical Devices

Operational Warnings

Operational Cautions

Antenna Installation

Introduction

General

Transmitter Circuitry

Receiver Circuitry The station receive circuitry features multiple bandwidth capability

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

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

Switching Power Supply

Standard Features • Compact single case design

Optional Hardware Features

System Applications 4

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

External Duplexer Operation

Repeater RA or Cross Band Repeater Operation

Model Chart

Approved Accessories 6

General The following accessories are recommended by Motorola for use

Antenna One of the following antennas should be used:

Setup and Connections 7

Programming with RSS

Introduction

Connecting PC to PDR 3500 RSS Port

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

Alignment From the Main Menu, press “F2-Service. ” No w press “F3” to arri ve

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

Electrical Connections

Power Supply Connections

RF Cabling Connections

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

Separate RX and TX Connectors

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

Operation 8

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

Summary of Switches, Pushbuttons, and Connectors

Summary of LED Indicators

Troubleshooting 9

Introduction This section provides troubleshooting recommendations and

Troubleshooting Overview

Recommended T est Equipment

Test Equipment List • Motorola R2001 or R2600 Series

Troubleshooting Procedures

Troubleshooting Overview

Introduction Two procedures are provided for troubleshooting the PDR 3500

Procedure 1: Routine Maintenance Functional Checkout

Procedure 2: Troubleshooting A Reported/Suspected Problem

How to Use These Troubleshooting Procedures

Interpreting LED Indicators

Interpreting Alarm Alert T ones

Introduction Four station alarm conditions are reported with audio alert tones

V erifying Transmitter Circuitry

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

Verifying T ransmitter Circuitry Procedure

Verifying Receiver Circuitry

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

Verifying Receiver Circuitry Procedure

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

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

Module Replacement Procedures