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Computer-Based Instruments NI 5620 User Manual Digitizer for PXI NI 5620 User Manual ™ June 2001 Edition Part Number 322949 B-01.
Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 794 0100 Worldwide Off.
Important Information Warranty The NI 5620 is warranted ag ainst defects i n materials an d workmanshi p for a peri od of one ye ar from the da te of shipme nt, as eviden ced by receipts or other documenta tion. National Instruments will, at it s option, repair or replace equipment that proves to be defective during the warranty period.
Compliance FCC/Canada Radio Frequency Interference Compliance* Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless communications from interference.
Canadian Depart ment of Communications This Class B digital apparatus meets all requirements of the Canadian I nterference-Causing Equipment Regulations. Cet appareil num é rique de la classe B respecte toutes les exigences du R è gleme nt sur le mat é riel brouilleur du Canada.
Conventions The follo wing con ventions 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 e xample, DBIO<3..0>. » The » symbol leads you through nested menu items and dialog box options to a final action.
© National Instruments Corporatio n vii NI 5620 User Manual Contents Chapter 1 Taking Measurements with the NI 5620 Installing the Software and Hardware .............. .......................... ......................... .......... 1-1 Acquiring Data with Your NI 5620 .
© National Instruments Corporatio n 1-1 NI 5620 User Manual 1 T aking Measurements with the NI 5620 Thank you for buying a National In struments (NI) 5620 digitizer. This chapter provides information on installing, conn ecting signals to, and acquiring data from the NI 5620.
Chapter 1 T aking Measurements w ith the NI 5620 NI 5620 User Manual 1-2 ni.com Acquiring Data with Y our NI 5620 You can acquire data programmatically either by writing an application for your NI 5620 or using on e of the examples that ships w ith NI-SCOPE.
Chapter 1 T ak ing Measuremen ts with the NI 5620 © National Instruments Corporatio n 1-3 NI 5620 User Manual Caution Do not operate the device in an e xplosive at mosphere or where there may be flammable gases or fumes. The device can only be operated at or belo w pollution degree 2, as stated in Appendix A, Specifications .
© National Instruments Corporatio n 2-1 NI 5620 User Manual 2 Hardware Over view This chapter provides an overview of the feat ures and functionality of the NI 5620. How the NI 5620 W orks A signal follows this path through the NI 56 20 to your host computer: 1.
Chapter 2 Hardware Over view NI 5620 User Manual 2-2 ni.com Connecting Signals Figure 2-2 shows the NI 5620 front panel, w hich contains three connectors — two SMA connectors and an SMB connector. One of the SMA connectors, INPUT , i s for attaching the analog inpu t signal you wish to measure.
Chapter 2 Hardware Over view © National Instruments Corporatio n 2-3 NI 5620 User Manual Conditioning the Signal—Impedance, Dither , Gain, and AC Coupling To minimize distortion, signals receive a minimal amount of conditioning. There is one set gain, and all signals are AC coupled, meaning that the NI 5620 rejects any DC portion of a signal .
Chapter 2 Hardware Over view NI 5620 User Manual 2-4 ni.com Incorporating the DDC You may optionally route the data through the DDC before storing it in onboard memory .
Chapter 2 Hardware Over view © National Instruments Corporatio n 2-5 NI 5620 User Manual Block Diagram This block diagram is intended for advanced users.
Chapter 2 Hardware Over view NI 5620 User Manual 2-6 ni.com acquisition clock in a free-r unning state, in which the acquisiti on clock is not synchronized to any e xternal reference. The voltage controlled c rystal oscillator (VCXO) is a 6 4 MHz clock.
Chapter 2 Hardware Over view © National Instruments Corporatio n 2-7 NI 5620 User Manual Figure 2-4. Multiple-Record Acquisition Timing Diagram T riggering You can externally trigger the NI 5620 t hrough the digital line, PFI1. You can also use software to trigger it.
Chapter 2 Hardware Over view NI 5620 User Manual 2-8 ni.com 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.
© National Instruments Corporatio n A- 1 NI 5620 User Manual A Specifications This appendix lists the sp ecifications of the NI 5620. These specifications are typical at 25 ° C unless otherwise specif ied. General Specifications Number of channels .
Appendix A Specifications NI 5620 User Manual A-2 ni.com VSWR 0.1 to 25 MHz ...................... ............< 1.5:1 25 to 32 MHz ................. ..................< 3:1 Dither (can be disabled) Frequency range .... ...................... ..
Appendix A Specifications © National Instruments Corporatio n A- 3 NI 5620 User Manual Figure A-1. Frequency Response from 5 to 100 MHz Phase Group delay variation (5 to 25 MHz) .................... ..................... 9 ns pk-to-pk Group delay variation (0.
Appendix A Specifications NI 5620 User Manual A-4 ni.com T riggering Modes ..................... .......................... ...... Immediate, software, digital Sources....................... ......................... .... PFI 1, RTSI<0..7>, PXI star Export .
Appendix A Specifications © National Instruments Corporatio n A- 5 NI 5620 User Manual Environmental Specifications Calibration interval ... ......................... .... 1 year Warm-up time .. ............................. ......... 10 minutes Operating environment Ambient temperature .
Appendix A Specifications NI 5620 User Manual A-6 ni.com Electromagnetic Compatibility CE, C-Tick, and FCC Part 15 ( Class A) compliant Electrical emissions .................... ............EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Electrical immunity .
© National Instruments Corporatio n B- 1 NI 5620 User Manual B T echnical Support Resources W eb Support National Instruments W eb support is your first stop for help in solving installation, configuration, and application pro blems and questions.
Appendix B T echnical Support R esources NI 5620 User Manual B-2 ni.com W orldwide Support National Instruments has of fices located around the world to help address your support needs. Y ou can access our branc h of fice W eb sites from the W o rldwide Of fices section of ni.
© National Instruments Corporatio n G-1 NI 5620 User Manual Glossar y Pref ix Meanings V alue p- pico 10 – 12 n- nano- 10 – 9 µ- micro- 10 – 6 m- milli- 10 – 3 k- kilo- 10 3 M- mega- 10 6 G-.
Glossary NI 5620 User Manu al G-2 © National Instruments Cor poration A C coupled allowing the transmission of A C signals while blocking DC signals ADC analog-to-digital con verter — an electronic.
Glossary © National Instruments Corporatio n G-3 NI 5620 User Manual CMRR common-mode rejection ratio — a measure of an instrument ’ s ability to reject interference from a common-mode signal, us.
Glossary NI 5620 User Manu al G-4 © National Instruments Cor poration dr i v er s software that control s a specific hardware instrument DSP digital signal processo r E EEPR OM electrically erasable .
Glossary © National Instruments Corporatio n G-5 NI 5620 User Manual input bias current the current that flows into the inputs of a circuit input impedance the measured resistance an d capacitance between the input terminal s of a circuit instrument driv er a set of high-lev el software functio ns that controls a specific plug-in D A Q board.
Glossary NI 5620 User Manu al G-6 © National Instruments Cor poration N noise an undesirable electrical signal — Noise comes from e xternal sources such as the A C power line, motors, generators, t.
Glossary © National Instruments Corporatio n G-7 NI 5620 User Manual random interleav ed sampling method of increasing sample rate b y repetitiv ely sampling a repeated wav eform real-time sampling s.
Glossary NI 5620 User Manu al G-8 © National Instruments Cor poration T temperature coef ficient the percentage that a measurement will v ary according to temperature.
Glossary © National Instruments Corporatio n G-9 NI 5620 User Manual W wa veform shap e the shape the magni tude of a signal creates ov er ti me working voltage the hi ghest voltage that should be ap.
© National Instruments Corporatio n I-1 NI 5620 User Manual Index A AC coupling, 2-3 acquiring data multiple-record acqui sitions, 2-6 programmatically, 1-2 ADC, 2-3 amplitude specifications, A-2 to .
Index NI 5620 User Manual I- 2 ni.com signal path from NI 5620 to host computer, 2-1 storing data in memory, 2-4 synchronizing multiple PXI d evices, 2-8 triggering, 2-7 I incorporating DDC, 2-4 input.
Index © National Instruments Corporatio n I-3 NI 5620 User Manual system integration, by Natio nal Instrument s, B-1 System Reference Clock, PXI, 2-9 T technical support resources, B-1 to B-2 TIO (ti.
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