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National Instruments PCI-5911 User Manual
Summary of PCI-5911
Page 1
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...
Page 3: Important Information
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 ...
Page 4: Compliance
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 industri...
Page 5: Contents
© national instruments corporation v ni pci-5911 user manual contents about this manual conventions ...................................................................................................................Vii related documentation...............................................................
Page 6: Appendix A
Contents ni pci-5911 user manual vi ni.Com memory ......................................................................................................................... 2-10 triggering and memory usage ....................................................................... 2-10 multi-record acqui...
Page 7: About This Manual
© national instruments corporation vii ni pci-5911 user manual 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...
Page 8: Related Documentation
About this manual ni pci-5911 user manual viii ni.Com 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 ...
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About this manual © national instruments corporation ix ni pci-5911 user 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 ...
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About this manual ni pci-5911 user manual x ni.Com 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 ( meters and measurements on primary o...
Page 11: Introduction
© national instruments corporation 1-1 ni pci-5911 user manual 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 installin...
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Chapter 1 introduction ni pci-5911 user manual 1-2 ni.Com 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. Figure 1-1. Ni 5911 connectors ch 0 pfi 1 pfi 2 (din).
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Chapter 1 introduction © national instruments corporation 1-3 ni pci-5911 user manual 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....
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Chapter 1 introduction ni pci-5911 user manual 1-4 ni.Com 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»na...
Page 15: Hardware Overview
© national instruments corporation 2-1 ni pci-5911 user manual 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. Figure 2-1...
Page 16: Grounding Considerations
Chapter 2 hardware overview ni pci-5911 user manual 2-2 ni.Com 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–. Fi...
Page 17: Input Ranges
Chapter 2 hardware overview © national instruments corporation 2-3 ni pci-5911 user manual 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 in...
Page 18: Input Bias
Chapter 2 hardware overview ni pci-5911 user manual 2-4 ni.Com where v m is the measured voltage, v s is the source voltage, r s is the external source impedance, and r in is the input impedance. If the device you are measuring has a very large output impedance, your measurements will be affected by...
Page 19: Conventional Mode
Chapter 2 hardware overview © national instruments corporation 2-5 ni pci-5911 user manual 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 ...
Page 20: Flexible Resolution Mode
Chapter 2 hardware overview ni pci-5911 user manual 2-6 ni.Com flexible resolution mode table 2-2 shows the relationship between the available sampling rates, resolution, and the corresponding bandwidth for flexible resolution mode. Like any other type of converter that uses noise shaping to enhance...
Page 21: Calibration
Chapter 2 hardware overview © national instruments corporation 2-7 ni pci-5911 user manual calibration the ni 5911 can be calibrated for high accuracy and resolution because of an advanced calibration scheme. There are two different types of calibration: internal, or self-calibration, and external c...
Page 22: External Calibration
Chapter 2 hardware overview ni pci-5911 user manual 2-8 ni.Com • the linearity of the adc is calibrated using an internal sine wave generator as reference. • the time-to-digital converter used for ris measurements is calibrated. Caution do not apply high-amplitude or high-frequency signals to the ni...
Page 23: Analog Trigger Circuit
Chapter 2 hardware overview © national instruments corporation 2-9 ni pci-5911 user manual figure 2-3. Trigger sources analog trigger circuit the analog trigger on the ni 5911 operates by comparing the current analog input to an onboard threshold voltage. This threshold voltage is the trigger value,...
Page 24: Trigger Holdoff
Chapter 2 hardware overview ni pci-5911 user manual 2-10 ni.Com trigger holdoff trigger holdoff is the minimum length of time (in seconds) from an accepted trigger to the start of the next record. In other words, when a trigger is accepted, the trigger counter is loaded with the desired holdoff time...
Page 25: Multi-Record Acquisitions
Chapter 2 hardware overview © national instruments corporation 2-11 ni pci-5911 user manual multi-record acquisitions after the trigger has been received and the posttrigger samples have been stored, the ni 5911 can be configured to begin another acquisition that is stored in another onboard memory ...
Page 26: Pfi Lines As Inputs
Chapter 2 hardware overview ni pci-5911 user manual 2-12 ni.Com pfi lines as inputs you can select pfi 1 or pfi 2 as inputs for a trigger or a reference clock. Refer to the synchronization section for more information about the use of reference clocks in the ni 5911. Pfi lines as outputs you can sel...
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Chapter 2 hardware overview © national instruments corporation 2-13 ni pci-5911 user manual route that trigger over the rtsi bus to trigger the other digitizer(s). However, the trigger that is routed to the other digitizer(s) is sent synchronously to an internal 25 mhz clock. For more information ab...
Page 28: Specifications
© national instruments corporation a-1 ni pci-5911 user manual a specifications this appendix lists the specifications of the ni 5911. These specifications are typical at 25 °c unless otherwise stated. Acquisition system bandwidth .............................................. 100 mhz maximum; refer...
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Appendix a specifications ni pci-5911 user manual a-2 ni.Com sample onboard memory........................4 mb or 16 mb memory sample depth 20 ks/s flexible resolution 20.5 bits 10 ks/s flexible resolution 21 bits * 1 ≤ n ≤ 2 24 in conventional mode sampling frequency mode sample depth (4 mb) sample...
Page 30: Acquisition Characteristics
Appendix a specifications © national instruments corporation a-3 ni pci-5911 user manual vertical sensitivity (input ranges) acquisition characteristics accuracy dc gain accuracy ................................... ±0.05% signal ±0.0001% fs for all input ranges at 1 ms/s in flexible resolution mode ...
Page 31: Filtering
Appendix a specifications ni pci-5911 user manual a-4 ni.Com filtering dynamic range noise (excluding input-referred noise) sampling frequency filter mode bandwidth ripple alias attenuation 100/ n* ms/s conventional 100 mhz ±3 db n/a 12.5 ms/s flexible resolution 3.75 mhz ±0.2 db –60 db 5 ms/s flexi...
Page 32: Distortion
Appendix a specifications © national instruments corporation a-5 ni pci-5911 user manual distortion timebase system reference clock...................................... 10 mhz clock accuracy (as master) .................... 10 mhz ±50 ppm clock input tolerance (as slave) ............. 10 mhz ±100 p...
Page 33: Triggering Systems
Appendix a specifications ni pci-5911 user manual a-6 ni.Com clock jitter .............................................. Rms , independent of reference clock source clock compatibility ................................Ttl for both input and output sampling clock frequencies conventional mode............
Page 34: Sampling Methods
Appendix a specifications © national instruments corporation a-7 ni pci-5911 user manual sampling methods random interleaved sampling................ 1 gs/s down to 200 ms/s effective sample rate, repetitive signals only real-time sampling ................................ Up to 100 ms/s sample rate ...
Page 35: Calibration
Appendix a specifications ni pci-5911 user manual a-8 ni.Com calibration self-calibration (internal calibration) .....Self-calibration is done using a software command. The calibration involves gain, offset and linearity correction for all input ranges and input modes. Interval.........................
Page 36: Ce Compliance
Appendix a specifications © national instruments corporation a-9 ni pci-5911 user manual ce compliance this product meets the essential requirements of applicable european directives, as amended for ce marking, as follows: • low-voltage directive (safety):73/23/eec • electromagnetic compatibility di...
Page 37: Technical Support and
© national instruments corporation b-1 ni pci-5911 user manual b technical support and professional services visit the following sections of the national instruments web site at ni.Com for technical support and professional services: • support—online technical support resources include the following...
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Appendix b technical support and professional services ni pci-5911 user manual b-2 ni.Com if you searched ni.Com and could not find the answers you need, contact your local office or ni corporate headquarters. Phone numbers for our worldwide offices are listed at the front of this manual. You also c...
Page 39: Glossary
© national instruments corporation g-1 ni pci-5911 user manual glossary symbol prefix value 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 giga 10 9 symbols % percent + positive of, or plus – negative of, or minus / per ° degree ± plus or minus Ω ohm a a amperes a/...
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Glossary ni pci-5911 user manual g-2 ni.Com ac coupled the passing of a signal through a filter network that removes the dc component of the signal adc analog-to-digital converter—an electronic device, often an integrated circuit, that converts an analog voltage to a digital number adc resolution th...
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Glossary © national instruments corporation g-3 ni pci-5911 user manual clock hardware component that controls timing for reading from or writing to groups cmrr common-mode rejection ratio—a measure of an instrument’s ability to reject interference from a common-mode signal, usually expressed in dec...
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Glossary ni pci-5911 user manual g-4 ni.Com e eeprom electrically erasable programmable read-only memory—rom that can be erased with an electrical signal and reprogrammed equivalent time sampling any method used to sample signals in such a way that the apparent sampling rate is higher than the real ...
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Glossary © national instruments corporation g-5 ni pci-5911 user manual input impedance the measured resistance and capacitance between the input terminals of a circuit instrument driver a set of high-level software functions that controls a specific plug-in daq board. Instrument drivers are availab...
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Glossary ni pci-5911 user manual g-6 ni.Com n noise an undesirable electrical signal—noise comes from external sources such as the ac power line, motors, generators, transformers, fluorescent lights, soldering irons, crt displays, computers, electrical storms, welders, radio transmitters, and intern...
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Glossary © national instruments corporation g-7 ni pci-5911 user manual pretriggering the technique used on a device to keep a buffer filled with data, so that when the trigger conditions are met, the sample includes the data leading up to the trigger condition pxi pci extensions for instrumentation...
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Glossary ni pci-5911 user manual g-8 ni.Com sense in four-wire resistance the sense measures the voltage across the resistor being excited by the excitation current settling time the amount of time required for a voltage to reach its final value within specified limits source impedance a parameter o...
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Glossary © national instruments corporation g-9 ni pci-5911 user manual v v volts vac volts alternating current vdc volts direct current v error voltage error vi virtual instrument—(1) a combination of hardware and/or software elements, typically used with a pc, that has the functionality of a class...
Page 48: Index
© national instruments corporation i-1 ni pci-5911 user manual index a ac coupling, 2-4 accuracy characteristics, a-3 acquisition multiple record, 2-11 scope soft front panel, 1-4 acquisition characteristics specifications accuracy, a-3 common-mode characteristics, a-3 distortion, a-5 dynamic range,...
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Index ni pci-5911 user manual i-2 ni.Com e errors during acquisition, 2-8 example code, b-1 f filtering specifications, a-4 flexible resolution mode available sampling rates (table), 2-6 definition, 2-6 purpose and use, 2-6 frequently asked questions, b-1 g grounding considerations, 2-2 h hardware o...
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Index © national instruments corporation i-3 ni pci-5911 user manual declaration of conformity, b-1 professional services, b-1 system integration services, b-1 technical support, b-1 worldwide offices, b-2 ni 5911 see also hardware overview block diagram, 2-1 connectors bnc connector, 1-1 din connec...
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Index ni pci-5911 user manual i-4 ni.Com specifications acquisition characteristics accuracy, a-3 common-mode characteristics, a-3 distortion, a-5 dynamic range, a-4 filtering, a-4 acquisition modes, a-7 acquisition system, a-1 calibration, a-8 operating environment, a-7 physical, a-7 power requirem...