Technical 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
- 3.4. PCB Parts Placement
- 3.6. Frequency Reference Specifications
- 3.7. A431 Module’s Photographs
- 4. Software
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The A431 Radio Module
Commands valid for all bands
ID 1
PMP 65 72
SLOT 900 15
RSSI 58
Commands required for band 1
TF 430000000
BL 430000000 440000000
FREQ 430000000 12500
Commands required for band 2
TF 440000000
BL 440000000 450000000
FREQ 440000000 12500
Commands required for band 3
TF 450000000
BL 450000000 460000000
FREQ 450000000 12500
Commands required for band 4
TF 460000000
BL 460000000 470000000
FREQ 460000000 12500
Note: The TF command sets the start tuning frequency, the BL command sets the
band limits, and the FREQ command sets the actual operating frequency;
before shipping and depending on the target country, the last two parame-
ters may be changed. The BL command must always be issued before the
FREQ command.