©
National Instruments Corporation
4-1
SCXI-1102/B/C User Manual
Chapter
4
Theory of Operation
This chapter contains a functional overview of the SCXI-1102/B/C
module and explains the operation of each functional unit making up the
SCXI-1102/B/C module.
Functional Overview
The block diagram in Figure 4-1 illustrates the key functional
components of the SCXI-1102/B/C module.
Figure 4-1.
SCXI-1102/B/C Module Block Diagram
Front Signal Connector
CH 0 +
Gain 0
CH 0 –
CH 31+
CH 31 –
Lowpass
Filter
Digital
Control
Calibration EEPROM
Lowpass
Filter
Lowpass
Filter
CJSENSOR
MCH0+
Gain 31
Gain
Register
SCXIbus
Interface
SCXIbus Connector
Rear Signal Connector
Switch
Mux
MCH0-
AOGND
OUTREF
32-to-1 Mux
Switch
Inst.
Amp
+
Buffer
Switch
Mux
Input Protection
and Lowpass Filter
Inst.
Amp
+
Buffer
Buffer
Buffer
AB0+
AB0-
–
–
Input Protection
and Lowpass Filter
Input Protection
and Lowpass Filter