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Chapter 4 Theory of Operation
SCXI-1141/1142/1143 User Manual 4-2 ni.com
Figure 4-1. SCXI-1141/1142/1143 Module Block Diagram
External Clock
Analog Bus
Rear Signal Connector
Analog
Switch
Analog
Switch
Digital
Interface
and Control
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Input
Protection
Front Signal Connector
SCXIbus Connector
Calibration
Selection
+
–
Instrumentation
Amplifier
Instrumentation
Amplifier
Filter
Bypass
Input
Protection
Calibration
Selection
Calibration
EEPROM
+
–
Output Clock
AI 0
AI 7
AI 0+
AI 0–
AI 7+
AI 7–
Digital Control Bus
Internal
16-Pin Analog
Input Connector
8 to 1 Multiplexer
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Filter
Bypass
AI 0
AI 7