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Modular
Instrumentation
NI PCI-5911 User Manual
™
High-Speed Digitizer with Flex ADC
NI PCI-5911 User Manual
March 2003 Edition
Part Number 322150E-01
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Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 02 612 9672 8846, Austria 43 0 662 45 79 90 0, Belgium 32 0 2 757 00 20, Brazil 55 11 3262 3599, Canada (Calgary) 403 274 9391, Canada (Montreal) 514 288 5722, Canada (Ottawa) 613 233 5949, Canada (Québec) 514 694 8521, Canada (Toronto) 905 785 0085, Canada (Vancouver) 514 685 7530,
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Important Information Warranty The NI 5911 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due
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Compliance FCC/Canada Radio Frequency Interference Compliance Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC places digital electronics into two classes. These classes are known as Class A (for use in industrial-commercial locations only) or Class B (for use in residential or commercial locations). All National Instruments (NI) products are FCC Class A products. Depending on where it is operated, this
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Contents About This Manual Conventions ...................................................................................................................vii Related Documentation..................................................................................................viii Safety Information .........................................................................................................viii Chapter 1 Introduction Installing the NI 5911 ...........................................
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Contents Memory ......................................................................................................................... 2-10 Triggering and Memory Usage ....................................................................... 2-10 Multi-Record Acquisitions ............................................................................................ 2-11 RTSI Bus and Clock PFI ............................................................................................... 2-11 PFI
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About This Manual The NI 5911 User Manual provides information on installing, connecting signals to, and acquiring data from your NI 5911 high-speed digitizer. This manual includes an overview of the NI 5911 and explains the operation of each functional unit of the NI 5911. Conventions The following conventions appear in this manual: <> Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name—for example, DIO<3..0>. » The
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About This Manual Related Documentation The following documents contain information that you might find helpful as you read this manual: Where to Start with Your NI Digitizer NI-SCOPE Software User Manual NI-SCOPE Instrument Driver Quick Reference Guide You can download these documents from ni.com/manuals. Safety Information This section contains important safety information that you must follow when installing and using the device. Do not operate the device in a manner not specified in
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About This Manual Pollution Degree 3 means that conductive pollution occurs, or dry, nonconductive pollution occurs that becomes conductive due to condensation. You must insulate signal connections for the maximum voltage for which the device is rated. Do not exceed the maximum ratings for the device. Do not install wiring while the device is live with electrical signals. Do not remove or add connector blocks when power is connected to the system. Avoid contact between your body and the
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About This Manual outlets in the fixed installation, and stationary motors with permanent connections to fixed installations. Installation Category IV is for measurements performed at the primary electrical supply installation (<1,000 V). Examples include electricity meters and measurements on primary overcurrent protection devices and on ripple control units. NI PCI-5911 User Manual x ni.com
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1 Introduction Thank you for buying an NI PCI-5911 digitizer, featuring the Flex ADC for variable speed and resolution. This chapter contains information on installing, connecting signals to, and acquiring data from the NI 5911 Installing the NI 5911 Installation involves the following main steps: 1. Install the NI-SCOPE driver software. You use this driver to write programs to control the NI 5911 in different application development environments (ADEs). Installing NI-SCOPE also allows you
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Chapter 1 Introduction Note The +5 V signal is fused at 1.1 A. However, NI recommends limiting the current from this pin to 30 mA. The fuse is self-resetting. CH 0 PFI 1 PFI 2 (DIN) Figure 1-1. NI 5911 Connectors NI PCI-5911 User Manual 1-2 ni.com
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Chapter 1 Introduction 9 8 7 6 5 4 3 2 1 1 +5 V (Fused) 4Reserved 7 Reserved 2GND 5Reserved 8 Reserved 3 Reserved 6PFI 2 9 Reserved Figure 1-2. 9-Pin Mini-Circular DIN Connector Acquiring Data with the NI 5911 You can acquire data either programmatically—by writing an application for the NI 5911—or interactively with the Scope Soft Front Panel. Programmatically Controlling the NI 5911 To help you get started programming the NI 5911, NI-SCOPE includes examples that you can use or modify. You
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Chapter 1 Introduction NI-SCOPE Function Reference Help, located at Start»Programs» National Instruments»NI-SCOPE. For more detailed VI help, use LabVIEW context-sensitive help (Help»Show Context Help) or the NI-SCOPE VI Reference Help, located at Start»Programs»National Instruments»NI-SCOPE. Interactively Controlling the NI 5911 with the Scope Soft Front Panel The Scope Soft Front Panel allows you to interactively control the NI 5911 as you would a desktop oscilloscope. To launch the Scope
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2 Hardware Overview This chapter includes an overview of the NI 5911, explains the operation of each functional unit making up the NI 5911, and describes the signal connections. Figure 2-1 shows a block diagram of the NI 5911. Analog Input AC/DC Coupling Connector Protect/ Calibration PGIA A/D Converter Mux 100 MHz, 8-Bit Noise Shaper Calibration Generator Timing I/O, Reference Digital I/O Memory Control Clock Connector Digital Signal Capture Processor Memory Data Figure 2-1. NI 5911 Block Di
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Chapter 2 Hardware Overview presented at the negative input is subtracted from the signal presented at the positive input. As shown in Figure 2-2, this subtraction removes ground noise from the signal. The inner conductor of the BNC is V+. The outer shell is V–. Input Signal V+ + V out PGIA V– – Ground Noise Figure 2-2. Signal Noise-Free Measurements Grounding Considerations The path for the positive signal has been optimized for speed and linearity. You should always apply signals to the
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Chapter 2 Hardware Overview Input Ranges To optimize the ADC resolution, you can select different gains for the PGIA so that you can scale your input signal to match the full input range of the converter. The NI 5911 PGIA offers seven input ranges, from ±0.1 V to ±10 V, as shown in Table 2-1. Table 2-1. Input Ranges for the NI 5911 Range Input Protection Threshold ±10 V ±10 V ±5 V ±5 V ±2 V ±5 V ±1 V ±5 V ±0.5 V ±5 V ±0.2 V ±5 V ±0.1 V ±5 V Note If you try to acquire a signal below the set i
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Chapter 2 Hardware Overview where V is the measured voltage, V is the source voltage, R is the external m s s source impedance, and R is the input impedance. in If the device you are measuring has a very large output impedance, your measurements will be affected by this impedance divider. For example, if the device has 1 MΩ output impedance, your measured signal is one-half of the actual signal value. Input Bias The inputs of the PGIA typically draw an input bias current of 1 nA at 25 °C. A
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Chapter 2 Hardware Overview to allow an 8-bit digitizer to acquire accurate data. However, the NI 5911 in flexible resolution mode is much more precise and thus requires a greater number of time constants of settling time to achieve the desired precision. Refer to Appendix A, Digitizer Basics, of the NI-SCOPE Software User Manual, for more information on input coupling. Conventional and Flexible Resolution Modes In conventional mode, the NI 5911 works as a conventional desktop oscilloscope,
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Chapter 2 Hardware Overview Flexible Resolution Mode Table 2-2 shows the relationship between the available sampling rates, resolution, and the corresponding bandwidth for flexible resolution mode. Table 2-2. Available Sampling Rates and Corresponding Bandwidth in Flexible Resolution Mode Sampling Rate Resolution Bandwidth 12.5 MS/s 11 bits 3.75 MHz 5 MS/s 14 bits 2 MHz 2.5 MS/s 15.5 bits 1 MHz 1 MS/s 17.5 bits 400 kHz 500 kS/s 18 bits 200 kHz 200 kS/s 18.5 bits 80 kHz 100 kS/s 19 bits 40 kHz
