Barcode Reader User Manual

Contents
SC-2043-SG User Manual vi © National Instruments Corporation
Chapter 4
Theory of Operation
.......................................................................................................... 4-1
Functional Overview...................................................................................................... 4-1
Bridge Completion Network.......................................................................................... 4-3
Amplification ................................................................................................................. 4-3
Offset Nulling ................................................................................................................ 4-3
Filtering.......................................................................................................................... 4-4
I/O Connectors and Breakout Screw Terminals ............................................................ 4-4
Excitation Voltage Source ............................................................................................. 4-4
Power Supply ................................................................................................................. 4-4
Chapter 5
Calibration Procedures
..................................................................................................... 5-1
Excitation Adjustment.................................................................................................... 5-1
Onboard Excitation Source ................................................................................ 5-1
External Excitation Source................................................................................. 5-2
Appendix A
Specifications
........................................................................................................................ A-1
Appendix B
Customer Communication
............................................................................................... B-1
Glossary.................................................................................................................................. G-1
Index ........................................................................................................................................ I-1