Chapter 4
Theory of Operation
SCXI-1502 User Manual
4-2
ni.com
Figure 4-1.
SCXI-1502 Module Block Diagram
Calibr
ation
Source
SCXIb
us
Interf
ace
CJSENSOR
Front Signal Connector
Rear Signal Connector
32-to-1 Mux
Input Protection
and Lowpass Filter
Lo
wpass
Filter
Switch
Switch
Switch
Mux
Inst.
Amp
+
–
CH 0 +
CH 0 –
CH 0 +
CH 0 –
Lo
wpass
Filter
Buff
er
Buff
er
Inst.
Amp
+
–
CH 31 +
CH 31 –
Gain 31
Gain 0
Lo
wpass
Filter
Gain Select
Digital Interf
ace
and Control
Buff
er
Buff
er
Mux
Calibr
ation EEPR
OM
Input Select
OUT REF
A
O
GND
AB 0 +
AB 0
–
SCXIbus Connector
