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
13
The Power Supply and Serial Interface
2.1.3. The Power Supply and Serial Interface
The interface connector allows for:
• External supply (any DC source from 5.6 to 10
volts)
• Communication over serial lines, at 19200 baud
(RS-485).
For testing purposes, Adcon supplies a 220VAC power
adapter that provides also an RS-485 to RS-232 conversion. Thus, the unit can be
connected to a serial port of a PC and can be switched in various operating modes.
A list of commands is given in the sub chapter “Controlling the Unit” on page 50.
2.1.4. External Power Supply
In order to test the unit over the specified supply range, a special power cable is sup-
plied by Adcon Telemetry. This cable must be connected to the interface connector
of the unit
before
the serial cable (see Figure 3). The two wires with banana plugs
may then be connected to an external variable power supply: the red plug to plus
and the black plug to minus.
WARNING!
Do not apply more than 10 Volts to the unit: permanent damage of the
device may result.
Figure 3.
Connection of an external power supply.
2.2. Specifications
The A440 fulfills the specifications of the EN 300 220-1, Class 12, and ETS 300 113,
as well as the FCC Part 90.214 (Subpart J) of the CFR 47.
1
2
3
4
V+
BA
Gnd
INTERF
+
-
Black
Red
5.6 to 10 Volt
ANT
To Interface Unit
A440