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
21
Additional Issues Related to Type Approval Testing
Local Oscillator Leakage 2 nW
Adjacent Channel Attenuation (both versions) 70 dB
RSSI dynamic 90 dB
Operating Current (incl. On-board Microcontroller) 15 mA
Transmitter (all measurements made on a 50 W resistive load)
Output Power 7 9 10 dBm
Spurious Radiation (0 to 862 MHz) 2 nW
Spurious Radiation (862 MHz to 3.5 GHz) 200 nW
Adjacent Channel Power (12.5 kHz version) -32 dBm
Adjacent Channel Power (25 kHz version) -44 dBm
Occupied Bandwidth (12.5 kHz version) 8.5 kHz
Occupied Bandwidth (25 kHz version) 15 kHz
Operating Current (incl. On-board Microcontroller) 50 mA
a. Data rate is content dependent.
b. This parameter represents the tunning range; the switching range can be
software limited to a narrower space (even to the extent of a single channel).
Parameter Min Typ Max Unit