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
10-4 December 1, 2000 68P81093C75-O
• 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 Division Multiplex (TDM)
bus.
• ASTRO and ASTRO CAI data signals are processed by an ASTRO
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.)
NOTE: The WIB is offered in the 4-wire configuration only.
Power Supply Module
Operation
The Power Supply Module is a switching-type power supply which
accepts an AC input (85-265 VAC, 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.