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
11-2 January 31, 2001 68P81093C75-O
Figure 16. PDR 3500 Functional Block Diagram
SPI Bus
To/From Station
Control Module
SPI Bus
To/From Station
Control Module
Receive
Antenna
RF Input/Output
(Top Panel)
RSS Terminal
(Laptop Typical)
2.1 MHz Ref
2.1 MHz Ref
2.1 MHz Ref
VCO & Ref Mod Audio
AC Input
(Top Panel)
DC Input
(Top Panel)
Switching
Circuitry
+13.8 V
+9.6 V
SW +5 V
LN +5 V
Regulator
Circuitry
RECEIVER MODULE
STATION CONTROL MODULE
POWER SUPPLY MODULE
WIRELINE INTERFACE BOARD
1st
Mixer
21.45 MHz (VHF)
73.35 MHz (UHF)
Address
Address
Address
Data
Data
Audio
Interface
Bus
SPI Bus
To/From
Station Modules
TDM Bus
HDLC Bus
VCO & Ref
Mod Audio
HDLC Bus
EXCITER MODULE POWER AMPLIFIER MODULE
2.1 MHz Ref
VCO & Ref
Mod Audio
PA Key
TX Enable
Modulated RF
TX Forward Power Detect
+13 DBM
Microprocessor
Power
Control
Circuitry
Synthesizer/
VCO
RF Switch
Circuitry
Differential Data
Data
Data
Data
Address
2.1 MHz Ref
2.1 MHz Ref
External
Speaker
Handset
Transmit
Antenna
Preselector
Filter
3-Pole (UHF)
5-Pole (VHF)
7-Pole (800/900)
Synthesizer/
VCO
Bandpass
Filtering
Custom
Receiver IC
(2nd Injection,
Amplification,
A/D Conversion)
Host
Microprocessor
RSS Host
Interface
Memory
Memory
DSP
ASIC
Digital
Signal
Processor
(DSP)
DSP
ASIC
Interface
Wireline Audio
From Station
To Landline
Wireline Audio
From Landline
To Station
Audio
Interface
Circuitry
2.1 MHz
Reference
Oscillator
Amplifier
Coupler
Peripheral
ASIC
ASTRO
Modem
Microprocessor
Memory
4 - Wire Audio Circuit
Host
ASIC
MAEPF-27042-O