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
16
Hardware
2.3. PCB Parts Placement (A733)
Figure 5.
A733MB Parts placement (top).
Local Oscillator Leakage 2 nW
Adjacent Channel Attenuation -70 dB
RSSI dynamic 90 dB
Operating Current (incl. On-board Microcontroller) 25 mA
Transmitter (all measurements made on a 50
Ω
resistive load)
Output Power 27 dBm
Spurious Radiation 200 nW
Adjacent Channel Power (12.5 kHz version) -34 dBm
Adjacent Channel Power (25 kHz version) -44 dBm
Occupied Bandwidth (12.5 kHz version) 7.0 kHz
Occupied Bandwidth (25 kHz version) 12 kHz
Operating Current (incl. On-board Microcontroller) 600 mA
a. Data rate is content dependent.
b. This parameter represents the alignment range; the switching range can
be limited in the software to a narrower space (even to the extent of a
single channel).
Parameter Min Typ Max Unit