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
9-16 December 1, 2000 68P81093C75-O
Verifying Receiver
Circuitry Procedure
Step 1. Connect test equipment by performing Step 1 through
3 shown in Figure 7.
NOTE: The cover plate over the SCM side of the chassis
must be removed to perform these tests.
Step 2. Disable PL and carrier squelch by repeatedly pressing
the PL/CSQ/Off button until receiver noise is heard
through the handset (or external speaker). Refer to
Figure 5 for the location of the PL/CSQ/Off button. If
no audio is heard, suspect the following:
• Faulty Receiver Module
• Faulty Station Control Module
• R2001 is outputting a carrier signal
Step 3. Set R2001 to generate a 0.5 µV (-13 dBm) FM signal
at the PDR 3500 receiver frequency, modulated by a 1
kHz tone at 3 kHz deviation. The 1 kHz tone should be
audible through the handset (or external speaker). If
no audio is heard, suspect the following:
• Faulty Station Control Module (2.1 MHz
reference)
• Faulty Receiver Module
• Faulty antenna-to-Receiver preselector RF cable
• Faulty R2001-to-station RF cable
• Duplexer/station receive frequency mismatch, or
faulty duplexer