Differential Measurements Using High-Speed Digitizers
PrintOverview
Taking differential measurements is easy to do with NI high-speed digitizers. With the built-in math functions, you can get a quick and easy value without having to manually take the data from two single ended measurements and perform the subtraction. The attached code demonstrates how to carry this out.
Downloads
Filename: scopediffmeasure.vi
Requirements: View
Filename: differential_measurements.zip
Requirements: View
This VI shows you how to take differential measurements with any of National Instruments two-channel high-speed digitizers. Using the built-in waveform math functions in NI-SCOPE, you can take differential readings using the subtract channels function.
Use this VI in conjunction with the "Differential Measurements using High-Speed Digitizers" Application Note. Also included with the Differential Measurements VI is the Gain and Offset Calibration VI discussed in the application note.
The second attached file scopediffmeasure.vi is a newer version of the same application designed to work in NI LabVIEW 8.5 and later, with NI-SCOPE version 3.3.2 or later.
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Requirements
Filename: scopediffmeasure.vi
Software Requirements
Application Software: LabVIEW Full Development System 8.5
Language(s): LabVIEW
Hardware Requirements
Hardware Group: High-Speed Digitizers (Scopes)
Driver: NI-Scope 3.3.2
Software Requirements
Application Software: LabVIEW Base Development System 6.1
Hardware Requirements
Hardware Group: High-Speed Digitizers (Scopes)
Driver: NI-Scope 2.1.4
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).