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
14
Hardware
Note: The parameters below were measured with the A440 + A431 combination.
Parameter Min. Typ. Max. Unit
Common
Supply 5.6 6.2 10.0 V
Operating Temperature -30 +70 °C
Relative Humidity 99 %
Class Protection IP65
RF Data Rate (Using the low-speed Modem) 1000 1500
a
a. Data rate is content dependent.
2000 bps
RF Data Rate (Using the high-speed Modem) 8000 bps
Operating Frequency (-44 version)
b
b. This parameter represents the alignment range; the switching range can
be limited in software to a narrower space (even to the extent of a single
channel).
430 450 MHz
Operating Frequency (-46 version)
b
450 470 MHz
Frequency Stability (-20 to +50°C) ±1.5 kHz
Frequency Stability (-30 to +60°C) ±2.5 kHz
Receive mode
Sensitivity (12 db S/S+N) -118 dBm
Image Frequency Attenuation (1st IF = 45 MHz) -70 dB
Local Oscillator Leakage 2 nW
Adjacent Channel Attenuation (12.5 kHz mode) -57 dB
RSSI dynamic 90 dB
Operating Current (incl. On-board Microcontroller) 32 mA
Transmit mode (all measurements made on a 50
Ω
resistive load)
Output Power 27 dBm
Spurious Radiation 200 nW
Adjacent Channel Power (12.5 kHz mode) -34 dBm
Occupied Bandwidth (12.5 kHz mode) 7.0 kHz
Operating Current (incl. On-board Microcontroller) 600 mA