National Instruments NI 5911 Acquiring Data

Chapter1 TakingMeasurements with the NI 5911

NI5911 User Manual 1-4 ni.com

Acquiring Data

Whenyou launch VirtualBench-Scope, it operates in continuous run mode.

To startacquiring signals w ith VirtualBench-Scope, complete the

following steps:

1. Connect a signal to Channel 0 of your NI 5911.

2. ConfigureVirtualBench-Scope.

a. From the Edit menu on the front panel, select General Settings.

b. SelectNI 5 911 from the instrument list as shown in Figure 1-3.

If the NI 5911 is not in the devicel ist,m akesure yo u have

properlyconfigured the device using Measurement & Automation

Explorer (MAX). Formore inform ation on howto configure

your NI 5911 in MAX, refer to the Where to Start with Your

Oscilloscope/Digitizer document that shipped with your NI 5911.

c. Click OK to use these settings.

Figure1-3. AcquireTab of VirtualBench-Scope Settings Dialog Box

1 Device Type Selector 2DeviceList

Contents

Main Page Important Information Warranty Copyright Trademarks WARNINGREGARDING 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 Installing the NI 5911 Connecting Signals Page Acquiring Data with Your NI 5911 Programmatically Controlling Your NI 5911 Interactively Controlling Your NI 5911 with VirtualBench-Scope Using the VirtualBench-Scope Soft Front Panel Acquiring Data Soft Front Panel Features Page Hardware Overview Differential Programmable Gain Input Amplifier (PGIA) Differential Input Grounding Considerations Input Ranges Input Impedance Input Bias Input Protection AC Coupling Oscilloscope and Flexible Resolution Modes Oscilloscope Mode Sampling MethodsReal Time and RIS Flexible Resolution Mode How Flexible Resolution Works Calibration Internally Calibrating the NI 5911 When Internal Calibration Is Needed What Internal Calibration Does Why Errors Occur During Acquisition External Calibration Triggering and Arming Analog TriggerCircuit Page Page TriggerHold-Off Memory Triggeringand Memor y Usage Multiple Record Acquisitions RTSI Bus Triggerand Clock Lines PFI Lines PFI Lines as Inputs PFI Lines as Outputs Synchronization A Specifications Acquisition System Acquisition Characteristics Accuracy Common-Mode Characteristics Filtering Dynamic Range Distortion Timebase System TriggeringSystems Page Calibration B Digitizer Basics Understanding Digitizers Nyquist Theorem Analog Bandwidth Sample Rate Vertical Sensitivity ADC Resolution Record Length TriggeringOptions Random Interleaved Sampling Page Making Accurate Measurements FigureB-7. DynamicRange of an 8-Bit ADC with Three Different Gain Settings Page Page C Technical Support Resources Web Support NI Developer Zone Customer Education System Integration Worldwide Support Glossary Symbols A B C D E F G H I Page N O P R S T U V W Index Numbers A B C E F G H I M N O P R S T V W