Technical Manual
Table Of Contents
- Wireless Sensor Interface A720 (addIT™)
- 1. About the A720
- 2. Hardware
- 4. Software
- 4.1. AMOS
- 4.2. Mode Check
- 4.3. A/D Task
- 4.4. The Terminal Task
- 4.5. The Radio Interface Task
- 4.5.1. Digital Squelch
- 4.5.2. Modulation Technique Used
- 4.5.3. Generic Format of a Radio Frame
- 4.5.4. Data Frames
- 4.5.5. Frame Types
- 4.5.5.1. Request
- 4.5.5.2. Broadcast Answer
- 4.5.5.3. Set I/O Request
- 4.5.5.4. Read I/O Answer
- 4.5.5.5. Broadcast Request
- 4.5.5.6. Ping
- 4.5.5.7. Pong
- 4.5.5.8. Memory Dump Request
- 4.5.5.9. Memory Dump Answer
- 4.5.5.10. Data
- 4.5.5.11. Set ID
- 4.5.5.12. Set Slot Time and Sample Rate
- 4.5.5.13. Set Frequency
- 4.5.5.14. Set Battery Charge Levels
- 4.5.5.15. Set Pulse Counters Parameters
- 4.5.5.16. General Acknowledge
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Table of Contents
1. About the A720 5
2. Hardware 6
2.1. The Radio Unit 6
2.1.1. Receiver Section 6
2.1.2. Synthesizer Section 8
2.1.3. Transmitter Section 9
2.2. The Modem Interface 9
2.3. The Microcontroller and the Power Management Sections 10
2.4. The Interface Board 11
3. Tuning Procedure 12
3.1. Programming the Boards 13
3.2. Setting-up the Default Parameters 13
3.3. Tuning 13
3.3.1. Definitions 14
3.3.2. Test Equipment Settings 15
3.3.2.1. Network Analyzer (HP 8711) 15
3.3.2.2. Service Monitor (Rohde & Schwarz CMS50) 15
3.3.3. Adjusting the Receiver Front End 16
3.3.4. Adjusting the VCOs 17
3.3.5. Checking the Receiver Parameters 17
3.3.6. Checking the Transmitter Parameters 18
3.3.7. Data Transfer Check 18
3.4. Additional Issues Related to Type Approval Testing 19