National Instruments NI 5911 O, P, R

Glossary

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National Instruments Corporation G-5 NI 5911 User Manual

O

Ohm’s Law (R=V/I)—the relationship of voltage to current in a resistance

overrange a segment of the input range of an instrument outside of the normal

measuring range. Measurements can still be made, usually with a

degradation in specifications.

P

PCI Peripheral Component Interconnect—a high-performance expansion bus

architecture originally developed by Intel to replace ISA and EISA; it is

achieving widespread acceptance as a standard for PCs and workstations

and offers a theoretical maximum transfer rate of 132 Mbytes/s

peak value the absolute maximum or minimum amplitude of a signal (AC + DC)

PXI PCI eXtensions for Instrumentation. PXI is an open specification that

builds off the CompactPCI specification by adding

instrumentation-specific features.

R

Rresistor

RAM random-access memory

resolution the smallest signal increment that can be detected by a measurement

system. Resolution can be expressed in bits or in digits. The number of bits

in a system is roughly equal to 3.3 times the number of digits.

rms root mean square—a measure of signal amplitude; the square root of the

average value of the square of the instantaneous signal amplitude

ROM read-only memory

CBIHWum.book Page 5 Thursday, October 29, 1998 1:56 PM

Contents

Main Page Important Information Warranty Copyright Trademarks WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS Conventions ! Contents Chapter 1 Taking Measurements with the NI 5911 Chapter 2 Hardware Overview Page Taking Measurements with the NI 5911 Connecting Signals Introduction to the VirtualBench-Scope Soft Front Panel Soft Front Panel Features Page Using the VirtualBench-SCOPE Soft Front Panel Acquiring Data Page National Instruments Corporation 2-1 NI 5911 User Manual Hardware Overview Figure 2-1. NI 5911 Block Diagram Measurement Fundamentals Differential Input Grounding Considerations Input Ranges Input Impedance Input Bias Input Protection AC Coupling Measurement Modes Oscilloscope Mode Flexible Resolution Mode Acquisition System Calibration Internal Calibration External Calibration Triggering and Arming Analog Trigger Circuit Page Trigger Hold-Off Memory Multiple Record Errors During Acquisition RTSI Bus Trigger and Clock Lines PFI Lines PFI Lines as Inputs PFI Lines as Outputs Synchronization A Specifications NI 5911 Acquisition System Page Acquisition Characteristics Accuracy Common-Mode Characteristics Filtering Dynamic Range Noise (excluding input-referred noise) Distortion Timebase System Triggering Systems Acquisition Modes Power Requirements Physical Operating Environment Storage Environment EMC Compliance Calibration Digitizer Basics Understanding Digitizers Nyquist Theorem Analog Bandwidth Sample Rate Vertical Sensitivity ADC Resolution Record Length Triggering Options Making Accurate Measurements Appendix B Digitizer Basics National Instruments Corporation B-5 NI 5911 User Manual Figure B-5. Dynamic Range of an 8-Bit ADC with Three Different Gain Settings Page Page C Customer Communication Electronic Services Bulletin Board Support FTP Support Fax-on-Demand Support Telephone and Fax Support Country Telephone Fax Technical Support Form NI 5911 Hardware and Software Configuration Form National Instruments Products Other Products Documentation Comment Form Title: Edition Date: Part Number: Mail to: Technical Publications Fax to: Technical Publications Glossary Numbers/Symbols A B C D E F G H I M N O P R S T V W Index A B C D E F G H I M N O P R S T V