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National Instruments NI 5620 User Manual

National Instruments NI 5620 User Manual

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Computer-Based
Instruments
NI 5620 User Manual
Digitizer for PXI
™
NI 5620 User Manual
June 2001 Edition
Part Number 322949B-01
Download from Www.Somanuals.com. All Manuals Search And Download.

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  • Page 1 Computer-Based Instruments NI 5620 User Manual Digitizer for PXI ™ NI 5620 User Manual June 2001 Edition Part Number 322949B-01 Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 2 Sweden 08 587 895 00, Switzerland 056 200 51 51, Taiwan 02 2528 7227, United Kingdom 01635 523545 For further support information, see the Technical Support Resources appendix. To comment on the documentation, send e-mail to techpubs@ni.com. Copyright © 2001 National Instruments Corporation. All rights reserved. Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 3 Warranty The NI 5620 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.
  • Page 4 Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department of Communications (DOC). Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the equipment under the FCC Rules.
  • Page 5 Canadian Department of Communications This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. Compliance to EU Directives Readers in the European Union (EU) must refer to the Manufacturer's Declaration of Conformity (DoC) for information** pertaining to the CE Mark compliance scheme.
  • Page 6 Conventions The following conventions are used 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, DBIO<3..0>. » The » symbol leads you through nested menu items and dialog box options to a final action.

  • Page 7: Table Of Contents

    Contents Chapter 1 Taking Measurements with the NI 5620 Installing the Software and Hardware ................1-1 Acquiring Data with Your NI 5620 ................1-2 Programmatically Controlling Your NI 5620..........1-2 Safety Information ......................1-2 Chapter 2 Hardware Overview How the NI 5620 Works ....................2-1 Connecting Signals..................2-2...

  • Page 8: Taking Measurements With The Ni 5620

    Installing the Software and Hardware For step-by-step instructions for installing the NI-SCOPE software and the NI 5620, see the Where to Start with Your NI 5620 Digitizer document. There are two main steps involved in installation: Install the NI-SCOPE driver. You use NI-SCOPE to write programs to control your NI 5620 in different application development environments (ADEs).

  • Page 9: Acquiring Data With Your Ni 5620

    Acquiring Data with Your NI 5620 You can acquire data programmatically either by writing an application for your NI 5620 or using one of the examples that ships with NI-SCOPE. Programmatically Controlling Your NI 5620 To help you get started programming your NI 5620, the software comes with examples that you can use or modify.
  • Page 10 Chapter 1 Taking Measurements with the NI 5620 Caution Do not operate the device in an explosive atmosphere or where there may be flammable gases or fumes. The device can only be operated at or below pollution degree 2, as stated in Appendix A, Specifications. Pollution is foreign matter, solid, liquid, or gas that may produce a reduction of dielectric strength or surface resistivity.

  • Page 11: Hardware Overview

    NI 5620. How the NI 5620 Works A signal follows this path through the NI 5620 to your host computer: The signal enters the NI 5620 through the analog front panel connector, INPUT. To find more about the front panel, see the Connecting Signals section later in this chapter.

  • Page 12: Connecting Signals

    Chapter 2 Hardware Overview Connecting Signals Figure 2-2 shows the NI 5620 front panel, which contains three connectors—two SMA connectors and an SMB connector. One of the SMA connectors, INPUT, is for attaching the analog input signal you wish to measure. The second SMA connector, REF CLK IN, is a 50 Ω,10 MHz, AC-coupled reference input.

  • Page 13: Conditioning The Signal-Impedance, Dither, Gain, And Ac Coupling

    There is one set gain, and all signals are AC coupled, meaning that the NI 5620 rejects any DC portion of a signal. The NI 5620 also has a set input impedance of 50 Ω and applies dither to the configurable signal.

  • Page 14: Incorporating The Ddc

    FFT may be used to look at only the band passed through the DDC. Refer to the NI-SCOPE VI Reference Help for specific DDC attributes you can use to program your NI 5620. If you installed the included measurement software, there is also online help for LabVIEW users using the DDC.

  • Page 15: Block Diagram

    10 MHz reference clock supplied through REF CLK IN or to the CLK 10 signal from the PXI backplane. You can also choose to leave the © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.

  • Page 16: Other Features

    This process is a multiple-record acquisition. To perform multiple-record acquisitions, configure the NI 5620 to the number of records to be acquired before starting the acquisition. The NI 5620 acquires an additional record each time a trigger is accepted until all the requested records have been stored in memory.

  • Page 17: Triggering

    Figure 2-4. Multiple-Record Acquisition Timing Diagram Triggering You can externally trigger the NI 5620 through the digital line, PFI1. You can also use software to trigger it. Figure 2-5 shows the different trigger sources. The digital triggers are TTL-level signals with a minimum pulse-width requirement of 100 ns or 16 ns times the DDC decimation.

  • Page 18: Synchronizing Multiple Pxi Devices

    Hardware Overview Synchronizing Multiple PXI Devices The NI 5620 uses a PLL to synchronize the 64 MHz sample clock to a 10 MHz reference clock. You can either supply the reference clock through the SMA connector (REF CLK IN) on the front panel or use the system reference clock on the PXI backplane.
  • Page 19 Specifications This appendix lists the specifications of the NI 5620. These specifications are typical at 25 °C unless otherwise specified. General Specifications Number of channels ....... 1 Resolution ..........14 bits Max sample rate ........64 MS/s (also integer divisions of 64 MS/s) Onboard memory Using DDC (complex data) ....

  • Page 20: Appendix A Specifications

    Absolute...........Less than ±0.5 dB Absolute, using calibration table ..Less than ±0.1 dB Absolute (0.1 to 32 MHz)....±2.5 dB Relative (0.1 to 32 MHz, to 15 MHz)....±1.5 dB NI 5620 User Manual ni.com Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 21 Group delay variation (0.5 to 30 MHz)........26 ns pk-to-pk Decimation rate with installed software ........32 to 4096 DDC tuning resolution ......0.014901 Hz © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 22 Connector (REF CLK IN) ......SMA female Impedance..........50 Ω Input amplitude........–5 to +15 dBm Max nonoperating input level....+16 dBm Max DC input voltage ......±10 VDC Frequency ..........10 MHz Required frequency accuracy ....±40 ppm NI 5620 User Manual ni.com Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 23 Meets the requirements of the following standards for safety for electrical equipment for measurement, control, and laboratory use: EN 61010-1:1993/A2:1995, IEC 61010-1:1990/A2:1995, UL 3101-1:1993, UL 3111-1:1994, UL 3121:1998, CAN/CSA C22.2 no. 1010.1:1992/A2:1997 d. © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 24 When tested as specified in EN 61000-4-6 at 3 Vrms, the spurious response will be within specifications except at the test frequency. A spurious signal of up to –45 dBm may appear at the test frequency. NI 5620 User Manual ni.com Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 25 Technical Support Resources Web Support National Instruments Web support is your first stop for help in solving installation, configuration, and application problems and questions. Online problem-solving and diagnostic resources include frequently asked questions, knowledge bases, product-specific troubleshooting wizards, manuals, drivers, software updates, and more. Web support is available through the Technical Support section of ni.com...
  • Page 26 Appendix B Technical Support Resources Worldwide Support National Instruments has offices located around the world to help address your support needs. You can access our branch office Web sites from the Worldwide Offices section of . Branch office Web sites provide ni.com...
  • Page 27 – negative of, or minus ° degree ± plus or minus Ω < less than amperes analog-to-digital alternating current © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 28 Typically, a bus is the expansion vehicle to which I/O or other devices are connected. An example of the PC bus is the PCI bus. Celsius CMOS complementary metal oxide semiconductor. A process used in making chips. NI 5620 User Manual © National Instruments Corporation Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 29 © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 30 NI 5620 User Manual © National Instruments Corporation Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 31 PCI bus interface. The MITE supports bus mastering for high-speed data transfers over the PCI bus. multiple-record multiple, distinct chunks (or records) of data acquisition © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 32 PCI eXtensions for Instrumentation. PXI is an open specification that builds on the CompactPCI specification by adding instrumentation-specific features. resistor random-access memory NI 5620 User Manual © National Instruments Corporation Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 33 (higher is better) system noise a measure of the amount of noise seen by an analog circuit or an ADC when the analog inputs are grounded © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 34 (2) a LabVIEW software module (VI), which consists of a front panel user interface and a block diagram program volts, root mean square value NI 5620 User Manual © National Instruments Corporation Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 35 © National Instruments Corporation NI 5620 User Manual Download from Www.Somanuals.com. All Manuals Search And Download.
  • Page 36 A-6 environmental specifications, A-5 external frequency reference input basic signal flow (figure), 2-1 specifications, A-4 block diagram for NI 5620 digitizer, 2-5 to 2-6 frequency specifications, A-2 calibration, 2-7 certifications and compliances, A-6 conditioning signals AC coupling, 2-3...
  • Page 37 Index signal path from NI 5620 to host computer, 2-1 programmatically controlling the NI 5620, 1-2 storing data in memory, 2-4 PXI devices, multiple, synchronizing, 2-8 synchronizing multiple PXI devices, 2-8 triggering, 2-7 REF CLK IN connector, 2-2, 2-8 incorporating DDC, 2-4...
  • Page 38 System Reference Clock, PXI, 2-9 voltage controlled crystal oscillator (VCXO), 2-6 technical support resources, B-1 to B-2 TIO (timing engine), 2-6 Web support from National Instruments, B-1 trigger and clock routing area, 2-6 Worldwide technical support, B-2 triggering digital trigger sources (figure), 2-7...
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