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Computer-Based Instruments NI 5102 User Manual High-Speed Digitizer NI 5102 User Manual June 2001 Edition Part Number 321390D-01.
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Important Information Warranty The NI 51 02 is warranted against defects in materials and workmans hip for a period of one year from the date of shipment , as evidenced by receipts or other documenta tion. National Instruments will, at its option, r epair 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.
© National Instruments Corporatio n vii NI 5102 User Manual Contents About This Manual Conventions Used in This Manual ................. ................. ................. ................. ............. ix Related Documentation ............... ....
Contents NI 5102 User Manu al viii ni.com Chapter 4 Hardware Overview I/O Connector ............. .............. ................. ................. ................. ................. .............. ... 4-2 Signal Connections ................ .......
© National Instruments Corporation ix NI 5102 User Manual About This Manual T h eN I5 1 0 2i sa na n a l o gi n p u td e v i c ea v a i l a b l ei nP C I ,P X I ,I S A , PCMCIA, and USB form factors. This manual descri bes the installation and operation of these digitizers.
About This Man ual NI 5102 User Manual x ni.com NI 5102 NI 5102 is a generic term t hat denotes one or more of t he NI 5102 (PCI), NI 5102 (PXI), NI 5102 (ISA), NI 5102 (PCMCIA), and NI 51 02 (USB) de vices. NI 5102 (ISA) Refers to the NI 5102 for ISA bus.
© National Instruments Corporatio n 1-1 NI 5102 User Manual 1 Introduction This chapter describes the National Instruments (NI) 5102 and lists additional equipment.
Chapter 1 Introduction NI 5102 User Manual 1-2 ni.com T o improv e timing resolutio n for repetitiv e sign als, you can use random interleaved sampling (RIS) on your NI 51 02. This method of samplin g allo ws you to view pretrigger data and achiev e an effecti ve sampling rate as high as 1 GS/s, 50 times the real-time sampling rate of the de vice.
Chapter 1 Introduction © National Instruments Corporatio n 1-3 NI 5102 User Manual Figure 1-1. The Relationship Between the Programming Environment, NI-DAQ, and Y our Hardware Interactively Controlli.
Chapter 1 Introduction NI 5102 User Manual 1-4 ni.com NI-SCOPE Driver The NI-SCOPE driver is the preferred choice to program you r NI 5102. It provides flexibilit y and programmabili ty in a standard .
Chapter 1 Introduction © National Instruments Corporatio n 1-5 NI 5102 User Manual Note NI 5102 digitizers use only th e easy I/O interface under data acquisition in LabW indows/CVI. The easy I/O interface provides limited functionality in CVI. T o use the NI 5102 to its full capabil ities, use the NI-SCOPE driv er as shown in Figure 1-1.
Chapter 1 Introduction NI 5102 User Manual 1-6 ni.com PXI-specific features, R TSI bus trigger , R TSI Clock, and Serial Communication are implemented on the J2 connector of the CompactPCI bus.
© National Instruments Corporatio n 2-1 NI 5102 User Manual 2 Installation and Configuration This chapter describes how to unpack, in stall, and configure your NI 5102.
Chapter 2 Installation and Configuration NI 5102 User Manual 2-2 ni.com – NI 5102 (USB) NI 5102 (USB) power supply ❑ V inyl pouch for storing cables and accessories for the NI 5102 (PCMCIA) only Unpacking ♦ NI 5102 (PCI, PXI, ISA) Y our device is shipped in an antistatic package to prev ent electrost atic damage to the device.
Chapter 2 Installation and Configuration © National Instruments Corporatio n 2-3 NI 5102 User Manual Installing the NI 5102 There are two main steps invol ved in installation: 1. Install the NI-S COPE driv er sof tware. Y ou use this driver to write programs to control your NI 5102 in different application de velopment en vironm ents (ADEs).
Chapter 2 Installation and Configuration NI 5102 User Manual 2-4 ni.com Hardware Configuration The NI 5102 is a fully software-configurable, Plug and Play device. Hardware confi guration infor mation and resource requi rements are stored in nonvolatile memory.
© National Instruments Corporatio n 3-1 NI 5102 User Manual 3 Digitizer Basics This chapter explains basic inform ation about using digitizers, i ncluding important terminology and use of the probe.
Chapter 3 Digitizer Basics NI 5102 User Manual 3-2 ni.com Analog Bandwidth Analog bandwidth describes the frequency range (in hertz) in which a signal can be digitized accurately.
Chapter 3 Digitizer Basics © National Instruments Corporatio n 3-3 NI 5102 User Manual Sample Rate Sample rate is the rate at which a signal is sampled and digitized by an ADC.
Chapter 3 Digitizer Basics NI 5102 User Manual 3-4 ni.com V ertical Sensitivity Vertical sensitivity describes th e smallest input voltage chan ge the digitizer can capture. This limitation is because one distinct digital voltage encompasses a range of analog voltages.
Chapter 3 Digitizer Basics © National Instruments Corporatio n 3-5 NI 5102 User Manual rate of 20 MHz, the duration of acquisitio n is 5 ms (100,000 × 50 ns). The NI 5102 has a buf fer size of 663,000 sam ples. When performi ng a single-channel acquisition, you can use the entire available memory to capture data for a duration of 33.
Chapter 3 Digitizer Basics NI 5102 User Manual 3-6 ni.com Figure 3-5. Dynamic Range of an 8-Bit ADC with Three Different Gain Settings • Source impedance — Many digitizers an d most digital stor age oscilloscopes (DSOs) hav e a 1 M Ω i nput resistance in the passb and with an X1 probe and a 10 M Ω input resistance with an X10 p robe.
Chapter 3 Digitizer Basics © National Instruments Corporatio n 3-7 NI 5102 User Manual buf fering. See the Understanding the Probe and Its Effects on Your Waveform section later in this chapter for more information.
Chapter 3 Digitizer Basics NI 5102 User Manual 3-8 ni.com Understanding the Probe and Its Effects on Y our W aveform Signals travel from the tip of the probe to the input amplifier and are then digitized by the ADC. This signal path makes the probe an important electrical system component that can severely affect the accuracy of the measurement.
Chapter 3 Digitizer Basics © National Instruments Corporatio n 3-9 NI 5102 User Manual Analytically , obtaining a flat frequency response means: R in /(R in +R p )=C p / ( C p +C in +C c ) It can be shown t hat: R in (C in +C c )=C p R p or the time constant of the probe equals the time constant of the digitizer input.
Chapter 3 Digitizer Basics NI 5102 User Manu al 3-10 ni.com Figure 3-7. Connecting the Probe Compensation Cabling As shown in Figure 3-8, an undercompensated probe attenuates higher frequency signals , whereas an ov ercompensated probe amplifies higher frequencies.
Chapter 3 Digitizer Basics © National Instruments Corporation 3-11 NI 5102 User Manual Figure 3-8. Probe Compensation Comparison Active and Current Probes You can also use active probes and current probes with digitizers and DSOs.
© National Instruments Corporatio n 4-1 NI 5102 User Manual 4 Hardware Over view This chapter includes an overview of t he NI 5102, explains the operatio n of each functional unit making up your NI 5102, and describes the signal connections. Figure 4-1 shows a block diagram of th e NI 5102 (PCI, PXI, ISA).
Chapter 4 Hardware Over view NI 5102 User Manual 4-2 ni.com Figure 4-2 shows a block diagram of th e NI 5102 (PCMCIA, USB). Figure 4-2. NI 5102 (PCMCIA, USB) Block D iagram I/O Connector ♦ NI 5102 (.
Chapter 4 Hardware Over view © National Instruments Corporatio n 4-3 NI 5102 User Manual The NI 5102 (PCI, ISA) gi ves you direct BNC connecti vi ty on the brack et, as shown in Figure 4-3. Figure 4-3. NI 5102 (PCI, ISA) I/O Connectors Use the cable assembly provided for these connections on the NI 5102 (PCMCIA), as sho wn in Figure 4-4.
Chapter 4 Hardware Over view NI 5102 User Manual 4-4 ni.com The NI 5102 (USB) gi ves you d irect BNC connecti vity , as sho wn in Figure 4-5. Figure 4-5.
Chapter 4 Hardware Over view © National Instruments Corporatio n 4-5 NI 5102 User Manual Figure 4-6. NI 5102 (PXI) I/O Connectors Signal Connections You can use CH0 and CH1 to digitize data as well as to trigger an acquisition. Use the TRIG channel for an external analog trigger only; data on the TRIG channel cannot be digitized.
Chapter 4 Hardware Over view NI 5102 User Manual 4-6 ni.com Serial Communications Port (AUX) ♦ NI 5102 (PXI) The serial communication port, A UX, provides +5V and GND for applications that may require up to 100 mA of current operation an d PF12 for triggering.
Chapter 4 Hardware Over view © National Instruments Corporatio n 4-7 NI 5102 User Manual The CH0, CH1, and TRIG channels ha ve a softw are-programmable coupling selection between A C and DC. Use AC coupling when your A C signal con tains a large DC component.
Chapter 4 Hardware Over view NI 5102 User Manual 4-8 ni.com ADC Pipeline Delay The ADC on th e NI 5102 is a pipelined flash converter wit h a maximum conversion rate of 20 MS/s. The pipeli ned architecture imposes a 2.5 Scan Clock cycle delay to convert analog vo ltage into a digital value, as shown in Figure 4-7.
Chapter 4 Hardware Over view © National Instruments Corporatio n 4-9 NI 5102 User Manual Note If Scan Clock is externally supplied, you must supply a free-running clock for proper operation. On the NI 5102 (ISA, PCMCIA, USB), data tran sfer takes place after an acquisition ends, limiting the scan count to the si ze of the onboard memory .
Chapter 4 Hardware Over view NI 5102 User Manu al 4-10 ni.com T able 4-5 describes the posttrigger acquisitio n signals. Table 4-5. Posttrigger Acquisition Signals Signal Description Start T rigger T riggers the acquisit ion. It can be generated through software, or CH0, CH1, TRIG, PFI1, and PF I2, or any of the se ven R TSI bus t rigger lines.
Chapter 4 Hardware Over view © National Instruments Corporation 4-11 NI 5102 User Manual Pretrigger Acquisition In pretrigger acquisition mod e, the device acquires a certain number of scans, called the pretrigger scan count, before the trigger occurs.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-12 ni.com Figure 4-9 shows the relev ant tim ing signals for a t ypical pretriggered acquisition. The illustratio n represents fi ve pretrigger and fi ve posttrigger scans, and abov e-high-lev el an alog triggering is used.
Chapter 4 Hardware Over view © National Instruments Corporation 4-13 NI 5102 User Manual T able 4-7 describes the pretrigger acquisitio n signals. Table 4-7. Pretrigger Acquisition Signals Signal Description Start T rigger Starts data acquisit ion. In pretrigger mo de, the Start Trigger signal enables the storage of pretrigger data.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-14 ni.com T rigger Sources The Scan Clock, Start Trigger, and Stop Trigger signals can b e generated through software or supplie d externally as digital triggers or as analog triggers on one of the input channels or the TRIG channel.
Chapter 4 Hardware Over view © National Instruments Corporation 4-15 NI 5102 User Manual Analog T rigger Circuit The NI 5102 contains a sophisticated analog trigger circuit that accepts boolean outputs from level comparators and makes intellig ent decisions about the trigger.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-16 ni.com Figure 4-11. Pretrigger and Posttrigger Acquisitions with Hold-off Note When you use trigger hold-off, you cannot calibrate your probe or g enerate an asynchronous frequency at the same time.
Chapter 4 Hardware Over view © National Instruments Corporation 4-17 NI 5102 User Manual Random Interleaved Sampling The NI 5102 supports Random Interleaved Sampling ( RIS), a form of Equivalent Time Sampling (ETS ) which allows multiplicatio n of the maximum real-time sampling rate.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-18 ni.com your NI 5102 and afterward s whenev er operating en vironm ent conditions change. Externally recalibrate the NI 510 2 when its interval has e xpired. This requires connecting a precision reference to your de vice, and is normally performed at NI or a metrology lab .
Chapter 4 Hardware Over view © National Instruments Corporation 4-19 NI 5102 User Manual Figure 4-12. R TSI Bus T rigger Lines The R TSI bus clock line is a special clock line on the R TSI bus that can only carry the timebase of the master to the slav es.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-20 ni.com PFI Lines All NI 5102 digitizers have two multipurpose programmable function digital input/output lines, PFI1 and PFI2, that yo u can use for external timing and triggering or output ting various signals.
Chapter 4 Hardware Over view © National Instruments Corporation 4-21 NI 5102 User Manual • Analog T rigger Circuit Ou tput — This signal is the digital o utput of the Analog T rigger Circuit on the NI 5102. Th e frequency and duty cycle of this signal depends o n the trigger cha nnel, the trig ger le vels, polarity , and tri ggering mode.
Chapter 4 Hardware Over view NI 5102 User Manu al 4-22 ni.com Master/Slave Operation You can use two or more NI 5102 digitizers in one system to increase the number of channels for your app lication by synchronizing devi ces over the RTSI bus or PFI lines.
Chapter 4 Hardware Over view © National Instruments Corporation 4-23 NI 5102 User Manual 3. Program the master d e vice to output it s internal timebase on the R TSI b us clock line. 4. Program the master device to output its Scan Clock and Stop T rigger on unused R TSI bus trigger lines.
© National Instruments Corporatio n A- 1 NI 5102 User Manual A Specifications This appendix lists the sp ecifications of the NI 5102. These specifications are typical at 25 ° C unless otherwise stated. The operating temperatu re range is 0 to 50 ° C.
Appendix A Specifications NI 5102 User Manual A-2 ni.com Input signal ranges (CH0, CH1) (without probe attenuation) ................ ....±5 V at gain of 1 ±1 V at gain of 5 ±0.25 V at gain of 20 ± 5 0m Va tg a i no f1 0 0 Input coupling ..........
Appendix A Specifications © National Instruments Corporatio n A- 3 NI 5102 User Manual T ransfer Characteristics Relative accuracy ................................... ±1 LSB typ, ±1.8 LSB max Differential nonlinearity ......................... ±0.
Appendix A Specifications NI 5102 User Manual A-4 ni.com T riggers Analog Source ................ ................. .............. ......CH0, CH1, TRIG Level .................. ................. ................ ....256 levels between ±Full-scale for CH0 and CH1; ±5 V for TRIG; software-selectable Slope .
Appendix A Specifications © National Instruments Corporatio n A- 5 NI 5102 User Manual R TSI (NI 5102 for PCI, PXI, ISA Only) Trigger lines ........... ................. ............... 7 I/O (6 I/O on the PXI-5102) Clock lines ................. ....
Appendix A Specifications NI 5102 User Manual A-6 ni.com Maximum W orking Voltage (Signal voltage plus common-m ode voltage) Channel to earth ....................... ...............5 V, Installation Category I Channel to channel ..................... .
Appendix A Specifications © National Instruments Corporatio n A- 7 NI 5102 User Manual by your product, and a link to the DoC (in Adobe Acrobat format) appears. Click the Acrobat icon to do wnload or read the DoC. Calibration Internal ...............
© National Instruments Corporatio n B- 1 NI 5102 User Manual B T echnical Support Resources W eb Support NI W eb support is your first stop for help in solving installation, configuration, and application problems and questions.
Appendix B T echnical Support Resources NI 5102 User Manual B-2 ni.com W orldwide Support NI has of fices located around the w o rld to help address your support needs. Y ou can access our branch of fice W eb sites from the W orldwide Off ices section of ni.
© National Instruments Corporatio n G-1 NI 5102 User Manual Glossar y Pref ix Meaning 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 5102 User Manual G-2 ni.com A C coupled allowing the transmission of A C signals while bl ocking DC signals ADC analog-to-digital con verter — an electronic de vice, often an integrated circuit, that con verts an analog voltage to a digital number ADC resolution the resolution of the AD C, which is measured in bits.
Glossary © National Instruments Corporatio n G-3 NI 5102 User Manual bandwidth the range of frequencies present in a signal, or the range of frequencies to which a measuring de v ice can respond bipo.
Glossary NI 5102 User Manual G-4 ni.com channel pin or wire lead to which you apply or from which you read the analog or digital signal. Analog signals can be single-ended or differential.
Glossary © National Instruments Corporatio n G-5 NI 5102 User Manual counter/timer a c ircuit that counts external pulses or clock pulses (timin g) coupling the manner in which a signal is connected .
Glossary NI 5102 User Manual G-6 ni.com DC coupled allowing the transmission of both A C and DC sign als default setting a default parameter v alue recorded in the driv er . In many cases, the default input of a control is a certain v alue (often 0) that means use the curr ent default setting .
Glossary © National Instruments Corporatio n G-7 NI 5102 User Manual DOS disk operating system down counter performing frequency d ivision on an internal signal DRAM dynamic RAM dri vers software tha.
Glossary NI 5102 User Manual G-8 ni.com expansion R OM an onboard EEPR OM that may contain dev ice-specific initialization and system boot functionality exte rnal trigger a vo ltage pulse from an exte.
Glossary © National Instruments Corporatio n G-9 NI 5102 User Manual G gain the factor by which a signal is amplif ied, sometimes expressed in decibels gain accuracy a measure of de viation of the ga.
Glossary NI 5102 User Manu al G-10 ni.com 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 of .
Glossary © National Instruments Corporatio n G-11 NI 5102 User Manual K kk i l o — the standard metric prefix for 1,000, or 10 3 , used w ith units of measure such as volts, hertz, and meters Kk i .
Glossary NI 5102 User Manu al G-12 ni.com MFLOPS million floating-poi nt operations per seco nd — the unit for e xpressing the computational po wer of a processor MIPS million inst ructions per seco.
Glossary © National Instruments Corporatio n G-13 NI 5102 User Manual NRSE nonreferenced sin gle-ended mode — all measurements are made with respect to a common (NRSE) measurement system reference,.
Glossary NI 5102 User Manu al G-14 ni.com PGIA programmable gain instrumentation amplifier pipeline a high-perfor mance processor struc ture in which the completi on of an instruction is broken into i.
Glossary © National Instruments Corporatio n G-15 NI 5102 User Manual R RAM random-access memory real time a property of an e vent or system in which data is processed as it is acquired instead of be.
Glossary NI 5102 User Manu al G-16 ni.com R p probe resistance RSE referenced single-ended mode — all measurements are made with respect to a common reference measurement system or a ground.
Glossary © National Instruments Corporatio n G-17 NI 5102 User Manual SC_TC scan counter terminal count si gnal SCXI Signal Conditioning eX tensions for Instrumentation — the NI product line for co.
Glossary NI 5102 User Manu al G-18 ni.com switchless device devices that do not require dip swi tches or jumpers to configure resources on the devices — also called Plug and Play de vices synchronou.
Glossary © National Instruments Corporatio n G-19 NI 5102 User Manual U unipolar a signal range that is always positi ve (for example, 0 to +10 V) update the ou tput equiv alent of a scan. On e or more analog or dig ital output samples. T ypically , the number of output samples in an update is equal to the number of channels in the output group.
Glossary NI 5102 User Manu al G-20 ni.com W Ww a t t s wa veform multiple voltage readings taken at a speci fic sampling rate word the standard number of bits that a processor or memory manipulates at one time.
© National Instruments Corporatio n I-1 NI 5102 User Manual Index A AC/DC coupling change set tling rates (table), 4-7 acquiring data, 1-2 to 1-5 interactive control of NI 5102 using Scope Soft Front.
Index NI 5102 User Manual I-2 ni.com D data acquisition. See acquiring data. digital trigger specifications, A-4 to A-5 digitizers ADC resolution, 3-4 analog bandwidth, 3-2 basic principles, 3-1 to 3-.
Index © National Instruments Corporatio n I-3 NI 5102 User Manual P F Il i n e s ,4 - 2 0t o4 - 2 1 input lines, 4-20 output lines, 4-20 t o 4-21 random interleaved samplin g, 4-17 RTSI bus trigger a.
Index NI 5102 User Manual I-4 ni.com NI-DAQ driver soft ware overview of NI-DAQ API, 1-4 relationship with programming environment and hard ware (figure), 1-3 NI Developer Zon e, B-1 NI-SCOPE driver, .
Index © National Instruments Corporatio n I-5 NI 5102 User Manual Scope Soft Front Panel, 1-3 serial communications port (AUX), 4-6 signal connections, 4-5 to 4-6 I/O connector sign al descriptions (table), 4-5 serial communications port (AUX), 4-6 signal shape, general, 3-7 Soft Front Panel, 1-3 software programming choices.
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