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Principles of Operation
Teledyne API
– T200 NO/NO2/NOx Analyzer Operation Manual
328
13.8.1. LVDS TRANSMITTER BOARD
The LVDS (low voltage differential signaling) transmitter board converts the parallel
display bus to a serialized, low voltage, differential signal bus in order to transmit the
video signal to the LCD interface PCA.
13.8.2. FRONT PANEL TOUCHSCREEN/DISPLAY INTERFACE PCA
The front panel interface PCA controls the various functions of the display and
touchscreen. For driving the display it provides connection between the CPU video
controller and the LCD display module. This PCA also contains:
power supply circuitry for the LCD display module
a USB hub that is used for communications with the touchscreen controller and
the two front panel USB device ports
the circuitry for powering the display backlight
13.9. SOFTWARE OPERATION
The T200 has a high performance, VortexX86-based microcomputer running
WINDOWS CE. Inside the WINDOWS CE shell, special software developed by
Teledyne API interprets user commands via the various interfaces, performs procedures
and tasks, stores data in the CPU‟s various memory devices and calculates the
concentration of the sample gas.
Windows CE
API FIRMWARE
ANALYZER
OPERATIONS
Calibration Procedures
Configuration Procedures
Autonomic Systems
Diagnostic Routines
INTERFACE HANDLING
Sensor input Data Display
Messages
Touchscreen
Analog Output Data
RS232 & RS485
External Digital I/O
MEMORY HANDLING
DAS Records
Calibration Data
System Status Data
MEASUREMENT
ALGORITHM
ANALYZER
HARDWARE
PC-104 BUSS
PC-104 BUSS
Figure 13-28: Basic Software Operation
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