Руководство по эксплуатации National Instruments NI PXI-562X

Руководство по эксплуатации для устройства National Instruments NI PXI-562X

Устройство: National Instruments NI PXI-562X
Категория: Графический планшет
Производитель: National Instruments
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Добавлено: 10/8/2014
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Краткое содержание
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Computer-Based
Instruments
NI PXI-562x User Manual
High-Speed Frequency-Domain Digitizer
NI PXI-562x User Manual
July 2002 Edition
Part Number 322949C-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 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 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, China 86 21 6555 7838, Czech Republic 02 2423 57

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Important Information Warranty The NI PXI-5620 and the NI PXI-5621 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 programmin

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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). Depending on where it is operated, this product could be subject to restrictions in the FCC rules. (In Canad

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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. The Manufacturer includes a DoC for mo

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Contents About This Manual Conventions ...................................................................................................................ix Related Documentation..................................................................................................x Chapter 1 Taking Measurements with the NI PXI-562x Installing the Software and Hardware ...........................................................................1-1 Configuring and Testing the Digitizer .................

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About This Manual The NI PXI-562x is a single-channel high-speed digitizer module whose dynamic range and resolution are optimized for frequency-domain analysis applications in research, product design and validation, and manufacturing test. This manual provides information on installing, connecting signals to, and acquiring data from the NI PXI-562x. This manual also provides an overview of the features, functionality, and use of the NI PXI-562x high-speed digitizer module. Conventions The foll

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About This Manual Related Documentation The following documents contain information that you might find helpful as you read this manual:  NI PXI-5620 Specifications  NI PXI-5621 Specifications  NI-SCOPE User Manual  Spectral Measurements Toolset User Guide NI PXI-562x User Manual x ni.com

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1 Taking Measurements with the NI PXI-562x The NI PXI-5620 is a 64 Ms/s, 14-bit frequency-domain digitizer module optimized for the best possible noise and distortion performance in a 5–25 MHz passband. It has a –3 dB front-end bandwidth from 10 kHz to 36 MHz, and is always AC-coupled, meaning it does not admit DC components of a signal. The NI PXI-5621 is a DC-coupled version of the NI PXI-5620, optimized for a passband of 0–25 MHz. Except for its permanent DC coupling and wider front-end bandw

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ON STANDBY 1 2 3 4 5 6 7 8 Chapter 1 Taking Measurements with the NI PXI-562x a. Insert your NI-SCOPE CD into your CD drive. If installation does not start automatically, navigate to your CD drive and click setup.exe. b. To install both the instrument driver and ADE examples, select the Programmatic and Interactive Support option when prompted. 3. Install the Spectral Measurements Toolset (SMT) CD, if included. The SMT provides frequency-domain functionality and examples. If installation does no

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Chapter 1 Taking Measurements with the NI PXI-562x 3. Find the NI 562x in the list. Notice the device number assigned to your NI 562x. You need this device number to program your NI 562x. 4. Right-click the device name, and select Properties from the menu. 5. From the Properties window, click Test Resources to test the device resources. A dialog box appears and indicates if the resource test has passed. 6. Click Run Test Panels to run the functional test panels and begin using your NI 562x. Conn

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Chapter 1 Taking Measurements with the NI PXI-562x For more detailed VI and function help, refer to the NI-SCOPE VI Reference Help and the NI-SCOPE Function Reference Help, located at Start»Programs»National Instruments»NI-SCOPE. Safety Information The following section contains important safety information that you must follow when installing and using the product. Do not operate the product in a manner not specified in this document. Misuse of the product can result in a hazard. You can compro

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Chapter 1 Taking Measurements with the NI PXI-562x Operate this product only at or below the installation category stated in the NI PXI-5620 Specifications and the NI PXI-5620 Specifications documents. The following is a description of installation categories:  Installation Category I is for measurements performed on circuits not 1 directly connected to MAINS . This category is a signal level such as voltages on a printed wire board (PWB) on the secondary of an isolation transformer. Examples o

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Chapter 1 Taking Measurements with the NI PXI-562x Below is a diagram of a sample installation. NI PXI-562x User Manual 1-6 ni.com

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2 Hardware Overview This chapter provides an overview of the features and functionality of the NI 562x. How the NI 562x Works A signal follows this path through the NI 562x to the host computer: 1. The signal enters the NI 562x through the analog front panel connector, INPUT. Refer to the Connecting Signals section to find more about the front panel. 2. The signal is filtered and conditioned. Gain and dither are applied to the signal. Refer to the Conditioning the Signal—Impedance, Dither, Gain,

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Chapter 2 Hardware Overview Connecting Signals Figure 2-2 shows the NI 562x 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 want to measure. The second SMA connector, REF CLK IN, is a 50 Ω , 10 MHz, AC-coupled reference input. The SMB connector, PFI1, is for external digital triggers. 562x 64 MS/s Digitizer INPUT 50 +20 dBm MAX REF CLK IN 50 +16 dBm MAX PFI 1 Figure 2-2. NI

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Chapter 2 Hardware Overview Conditioning the Signal—Impedance, Dither, Gain, and AC Coupling To minimize distortion, signals receive a minimal amount of conditioning. Gain and coupling are nonadjustable. The NI PXI-5620 is AC coupled, meaning it rejects any DC signal components. The NI PXI-5621 is DC coupled, meaning its wider passband acquires DC signal components also. Both versions of the NI 562x digitizer module have a set input impedance of 50 Ω and may apply dither to the input signal. Inp

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Chapter 2 Hardware Overview Incorporating the DDC Optionally, you can route the data through the DDC before storing it in onboard memory. The DDC is a digital signal processing (DSP) chip, the Intersil HSP50214B. The first stage uses a digital quadrature mixer that shifts a signal to baseband from any frequency within the range of the digitizer. The next stage decimates (reduces the sample rate) by an integer from 4–16,384. A series of programmable digital lowpass filters prior to each stage of

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Chapter 2 Hardware Overview Block Diagram The block diagram below illustrates the operation of the NI 562x. An explanation of some of these features follows. Digital Dither Downconverter Analog Input (INPUT) Onboard Data Path MITE Filter + ADC Logic Memory (PXI Interface) P X I Voltage Phase TIO Controlled PLL Detector (Timing and Control) Oscillator 10 MHz CalDAC Reference Input (REF CLK IN) CLK 10 Trigger and Clock Routing External Trigger PXI Trigger EXT TRIG (PFI) Figure 2-3. NI 562x Block D

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Chapter 2 Hardware Overview a free-running state, in which the acquisition clock is not synchronized to any external reference. The voltage controlled crystal oscillator (VCXO) is a 64 MHz clock. The trigger and clock routing area directs clock signals and triggers. The TIO is the timing engine used for the NI 562x. The MITE is the PXI bus interface. The MITE provides high-speed direct memory access (DMA) transfers from the NI 562x to the host computer memory. Other Features This section contain


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