User's Manual
Table Of Contents
- 1. Introduction
- 2. Hardware
- 3. The A431 Radio Module
- 3.1. About the A431 Radio Module
- 3.2. Functional description
- 3.3. Manufacturing Issues
- 3.3.1. Marking and labeling issues
- 3.3.2. Alignment Range and Switching Range
- 3.3.3. Tuning Procedure
- 3.3.4. Setting Up the Default Parameters
- 3.3.5. Definitions
- 3.3.6. Test Equipment Settings
- 3.3.7. Trimming Elements
- 3.3.8. Adjusting the Receiver Front End
- 3.3.9. Adjusting the VCOs
- 3.3.10. Adjusting the Crystal Reference
- 3.3.11. Checking the Receiver Parameters
- 3.3.12. Checking the Transmitter Parameters
- 3.3.13. Data Transfer Check
- 3.6. Frequency Reference Specifications
- 3.7. A431 Module’s Photographs
- 4. Software
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Table of Contents
Introduction ____________________________________________________7
About the A440 ______________________________________________________________ 7
Hardware _______________________________________________________9
Overview_____________________________________________________________________ 9
The Modem Interfaces ________________________________________________________________ 10
The Microcontroller and the Power Conditioning Sections _________________________________ 10
The Power Supply and Serial Interface___________________________________________________ 13
External Power Supply_________________________________________________________________ 13
Specifications________________________________________________________________13
PCB Parts Placement (A440) __________________________________________________15
Bills of Materials _____________________________________________________________15
A440MB _____________________________________________________________________________ 16
A440 Device’s Photographs___________________________________________________21
The A431 Radio Module _______________________________________ 27
About the A431 Radio Module________________________________________________27
Functional description________________________________________________________27
Receiver Section ______________________________________________________________________ 27
Transmitter Section____________________________________________________________________ 28
Manufacturing Issues _________________________________________________________30
Marking and labeling issues ____________________________________________________________ 30