National Instruments NI 5911 User Manual

Also see for NI 5911: Getting started guide

Contents

National Instruments NI 5911 User Manual Manual pdf 16 page image

Chapter 2 Hardware Overview© National Instruments Corporation 2-5 NI 5911 User Manualanalysis, distortion analysis, and other measurements for which highresolution is crucial.Oscilloscope ModeThe ADC converts at a constant rate of 100 MS/s, but you can choose tostore only a fraction of these samples into memory at a lower rate. Thisallows you to store waveforms using fewer data points and decreases theburden of storing, analyzing, and displaying the waveforms. If you needfaster sampling rates, you can use Random Interleaved Sampling (RIS) toeffectively increase the sampling rate to 1 GS/s for repetitive waveforms.In oscilloscope mode, all signals up to 100 MHz are passed to the ADC.You need to ensure that your signal is band-limited to prevent aliasing.Aliasing and other sampling terms are described more thoroughly in yourNI-SCOPE Software User Manual.Sampling Methods—Real-Time and RISThere are two sampling methods available in oscilloscope mode, real-timeand random interleaved sampling (RIS). Using real-time sampling, you canacquire data at a rate of 100/n MS/s, where n is a number from 1 to 2 32.RIS sampling can be used on repetitive signals to effectively extend thesampling rate above 100 MS/s. In RIS mode, you can sample at rates of100 MS/s × n, where n is a number from 2 to 10.Flexible Resolution ModeTable 2-2 shows the relationship between the available sampling rates,resolution, and the corresponding bandwidth for flexible resolution mode.