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
14
Wireless Sensor Interface A720 (addIT™)
3.3.1. Definitions
The diagram of the setup environment is depicted in
Figure 3.
Figure 2.
Trimming Setup.
The testing fixture is used to fasten the PCB under test both mechanically and elec-
trically in such a way to allow its rapid and comfortable trimming. It consists of a me-
chanical breadboard with two screws that are used to fasten the board; 5 elastic pins
are used to transport the relevant signals from the PCB to their corresponding appa-
ratus test cables. In addition, a switch (
Power/Sens. <–> Wobble
) allows switching of
the antenna input/output to the network analyzer or to the service monitor. The
schematic diagram of the testing fixture is depicted in
Figure 3.
Figure 3.
Schematic Diagram of the Testing Fixture.
0.765 V
Power/
Sens
Wobble
Out
Scope
In/Out
Service
Monitor
In
Network
Analyzer
Out
Voltmeter
Out
Network
Analyzer
Testing
Fixture
RS232 To/From PC
+
–
6.5 V
A720MB
Connector
Optional
Scope Service Monitor Network Analyzer
Voltmeter
Scope
Service
Monitor
In Network
Analyzer
Out Network
Analyzer
Wobble
Power/Sens.
Ant
Gnd
TP4
A720MB
TP2
TP1
Voltmeter
680 W
12 KW
1 MW