©
National Instruments Corporation
5-1
5
Theory of Operation
This chapter contains a functional overview of the SCXI-1104/C module
and explains the operation of each functional unit making up the
SCXI-1104/C module.
Functional Overview
The block diagram in Figure 5-1 illustrates the key functional components
of the SCXI-1104/C module.
Figure 5-1.
SCXI-1104/C Module Block Diagram
Front Signal Connector
CH 0 +
CH 0 –
CH 31+
CH 31 –
Lowpass
Filter
Digital
Control
Calibration EEPROM
Lowpass
Filter
MCH0+
SCXIbus
Interface
SCXIbus Connector
Rear Signal Connector
Switch
Mux
MCH0-
AOGND
OUTREF
32-to-1 Mux
Switch
Inst.
Amp
+
Buffer
Switch
Mux
Attenuator and
Lowpass Filter
Inst.
Amp
+
Buffer
Buffer
AB0+
AB0-
–
–
Attenuator and
Lowpass Filter