Contents
© National Instruments Corporation vii SCXI-1120/D User Manual
Figure 3-4. Floating AC-Coupled Signal Connection for the SCXI-1120...............3-6
Figure 3-5. AC-Coupled Signal Connection for the SCXI-1120 with
High Common-Mode Voltage...............................................................3-6
Figure 3-6. AC-Coupled Signal Connection for the SCXI-1120D with
High Common Mode Voltage...............................................................3-7
Figure 3-7. Floating AC-Coupled Signal Connection for the SCXI-1120D............3-7
Figure 3-8. SCXI-1120/D Rear Signal Connector Pin Assignments .......................3-8
Figure 4-1. SCXI-1120/D Block Diagram...............................................................4-1
Figure 4-2. Digital Interface Circuitry Block Diagram............................................4-3
Figure 4-3. SCXI-1120/D Digital Control ...............................................................4-4
Figure 4-4. Analog Input Block Diagram ................................................................4-6
Figure 4-5. Analog Output Circuitry........................................................................4-9
Tables
Table 2-1. Digital Signal Connections, Jumper Settings........................................2-7
Table 2-2. Jumper W46 Settings.............................................................................2-9
Table 2-3. Jumper W41 Settings.............................................................................2-10
Table 2-4. Gain Jumper Allocation.........................................................................2-10
Table 2-5. Gain Jumper Positions...........................................................................2-11
Table 2-6. SCXI-1120 Filter Jumper Allocation....................................................2-12
Table 2-7. SCXI-1120D Filter Jumper Allocation .................................................2-13
Table 3-1. SCXI-1120/D Front Connector Signal Descriptions.............................3-4
Table 3-2. Rear Connector Signal Descriptions .....................................................3-9
Table 3-3. SCXIbus to SCXI-1120/D Rear Connector
to DAQ Device Pin Equivalencies........................................................3-11
Table 5-1. Calibration Potentiometers Reference Designators...............................5-2
Table A-1. Input Signal Range................................................................................A-5
Table A-2. System Noise RTI (0.1 Hz to 50 kHz) ..................................................A-6
Table A-3. Switching Supply Noise (approximately at 100 kHz)...........................A-7
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