User's Manual
Table Of Contents
- Front Cover
- Contents
- 1 - Foreword 11
- 2 - Safety and General Information 21
- 3 - Introduction 31
- 4 - System Applications 41
- 5 - Models and Specifications 51
- 6 - Approved Accessories 61
- 7 - Setup and Connections 71
- 8 - Operation 81
- 9 - Troubleshooting 91
- Introduction 91
- Recommended Test Equipment 91
- Troubleshooting Procedures 91
- Module Replacement Procedures 925
- General Replacement Information 925
- Anti-Static Precaution 925
- Care of Gold-Plated Connector Contacts 926
- Power Down Station Before Removing/Inserting Modules 926
- Validating Repairs 926
- Module Replacement 926
- Wireline 928
- ASTRO Modem Card/V.24 Interface Card 929
- Receiver 929
- Exciter 931
- Power Amplifier 932
- Power Supply 933
- Backplane 934
- Preselector Field Tuning Procedure 935
- 10 - Functional Theory of Operation 101
- 11 - Block Diagram, Schematics, Electrical Parts List, and Circuit Board Detail 111
- List of Tables
- List of Figures
- Parts Lists
- Foreword
- Safety and General Information
- Introduction
- System Applications
- Models and Specifications
- Approved Accessories
- Setup and Connections
- Operation
- Troubleshooting
- Introduction
- Recommended Test Equipment
- Troubleshooting Procedures
- Module Replacement Procedures
- Preselector Field Tuning Procedure
- Functional Theory of Operation
- Schematics
- Back Cover
68P81093C75-O December 1, 2000 4-1
System Applications 4
Local Control The PDR 3500 is an APCO 25 digital repeater. The station is
identical in operation to the Quantar station, hence there is no local
control capability. There is no digital-to-audio translation within the
station. Local control style operation can be accomplished in several
ways:
a. A portable radio may be used as an RF control station talking to
the repeater.
b. The station may be equipped with the wireline and the modem
options and routed through a DIU to a tone remote console. The
Tone remote console controls the station via wireline through the
DIU. The wireline in this case is a local 4-wire cable.
External Duplexer
Operation
The PDR 3500 must be used with an external duplexer when
frequency spacing is less than 3 MHz. The duplexer isolation
required for proper operation is approximately 60 dB. Double-
shielded coaxial cables must be used from the repeater to the
duplexer.
Repeater RA or Cross
Band Repeater
Operation
The PDR 3500 can be configured for Repeater RA or cross band
repeater operation by adding the wireline card and the Astro modem
to the each repeater. The repeaters are connected together using the
wireline port on each repeater. The cables are terminated in RJ-45
connectors.
Repeater 1 Repeater 2
Wireline A Wireline A
Wireline B Wireline B