National Instruments 1142 用户手册
Contents
© National Instruments Corporation
vii
Figures
Figure 2-1.
Ground-Referenced Signal Connection.................................................2-4
Figure 2-2.
Floating Signal Connection ...................................................................2-5
Figure 2-3.
Ground-Referenced AC-Coupled Signal Connection ...........................2-5
Figure 2-4.
Ground Offset AC-Coupled Signal Connection....................................2-6
Figure 2-5.
Floating AC-Coupled Signal Connection..............................................2-6
Figure 4-1.
SCXI-1141/1142/1143 Module Block Diagram ...................................4-2
Figure 4-2.
Ideal and Real Lowpass Filter Transfer Function Characteristics ........4-5
Figure 4-3.
Real and Ideal Filter Responses to a Step Input Signal.........................4-6
Figure 4-4.
Typical Magnitude Response of the SCXI-1141/1142/1143 Module Filters .......................................................................................4-7
Figure 4-5.
Typical Passband Responses of the SCXI-1141/1142/1143 Module....4-8
Figure 4-6.
Phase Response Characteristics of the SCXI-1141/1142/1143 Module Filters .......................................................................................4-9
Figure 4-7.
Phase Error of the SCXI-1141/1142/1143 Module ...............................4-10
Figure 4-8.
Unit Step Response of the SCXI-1141/1142/1143 Module ..................4-11
Figure 4-9.
Aliasing of an Input Signal with a Frequency 0.8 Times the Sample Rate.....................................................................................4-12
Figure 5-1.
Typical Program Flowchart for Voltage Measurement Channels.........5-2
Figure A-1.
SCXI-1141/1142/1143 Dimensions ......................................................A-5
Figure B-1.
Removing the SCXI-1141/1142/1143 Module .....................................B-2