Related Manuals for National Instruments NI 5911
Summary of Contents for National Instruments NI 5911
- Page 1 Computer-Based Instruments NI 5911 User Manual High-Speed Digitizer with FLEX ADC ™ NI 5911 User Manual June 2001 Edition Part Number 322150D-01...
- 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 © 1998, 2001 National Instruments Corporation. All rights reserved.
- Page 3 The reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.
- 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: » The » symbol leads you through nested menu items and dialog box options to a final action. The sequence File»Page Setup»Options directs you to pull down the File menu, select the Page Setup item, and select Options from the last dialog box.
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Page 7: Table Of Contents
When Internal Calibration Is Needed ..............2-7 What Internal Calibration Does...............2-7 Why Errors Occur During Acquisition ..........2-8 External Calibration..................2-8 Triggering and Arming ....................2-8 Analog Trigger Circuit ..................2-9 Trigger Hold-Off .....................2-10 Memory..........................2-10 Triggering and Memory Usage ...............2-10 Multiple-Record Acquisitions..................2-11 © National Instruments Corporation NI 5911 User Manual... -
Page 8: Specifications
RTSI Bus and Clock PFI ....................2-11 PFI Lines ......................2-11 PFI Lines as Inputs ................2-12 PFI Lines as Outputs................. 2-12 Synchronization ....................2-12 Appendix A Specifications Appendix B Technical Support Resources Glossary Index NI 5911 User Manual viii ni.com... -
Page 9: Taking Measurements With The Ni 5911
Taking Measurements with the NI 5911 Thank you for buying a National Instruments (NI) 5911 digitizer, featuring the FLEX ADC. This chapter provides information on installing, connecting signals to, and acquiring data from your NI 5911. Installing the NI 5911 There are two main steps involved in installation: Install the NI-SCOPE driver software. - Page 10 PFI2 (DIN) Figure 1-1. NI 5911 Connectors 1 +5 Volts (Fused) 4 Reserved 7 Reserved 2 GND 5 Reserved 8 Reserved 3 Reserved 6 PFI 2 9 Reserved Figure 1-2. 9-Pin Mini Circular DIN Connector NI 5911 User Manual ni.com...
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Page 11: Acquiring Data With Your Ni 5911
LabVIEW VIs. For more detailed function reference help, see the NI-SCOPE Function Reference Help file, 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»National Instruments»NI-SCOPE. -
Page 12: Hardware Overview
The analog input of the NI 5911 is equipped with a differential programmable gain input amplifier. The PGIA accurately interfaces to and scales the signal presented to the analog-to-digital converter (ADC) regardless of source impedance, source amplitude, DC biasing, or common-mode noise voltages. © National Instruments Corporation NI 5911 User Manual... -
Page 13: Differential Input
As a result, most of the noise voltage occurs at the negative input of the PGIA where it is rejected, rather than in the positive input, where it would be amplified. NI 5911 User Manual ni.com... -
Page 14: Input Ranges
R is the input impedance. If the device you are measuring has a very large output impedance, your measurements will be affected by this impedance divider. For example, © National Instruments Corporation NI 5911 User Manual... -
Page 15: Input Bias
Flexible resolution differs from oscilloscope mode in two ways: it has higher resolution (sampling rate dependent), and the signal bandwidth is limited to provide antialiasing protection. This mode is useful for spectral NI 5911 User Manual ni.com... -
Page 16: Oscilloscope Mode
100 MS/s × n, where n is a number from 2 to 10. Flexible Resolution Mode Table 2-2 shows the relationship between the available sampling rates, resolution, and the corresponding bandwidth for flexible resolution mode. © National Instruments Corporation NI 5911 User Manual... -
Page 17: How Flexible Resolution Works
A digital lowpass filter applied to the data removes all but a fraction of the original shaped quantization noise. The signal is then resampled to a lower sampling frequency and a higher resolution. Flexible resolution provides antialiasing protection due to the digital lowpass filter. NI 5911 User Manual ni.com... -
Page 18: Calibration
This temperature stabilization accounts for the majority of the calibration time. • Gain and offset are calibrated for each individual input range. © National Instruments Corporation NI 5911 User Manual... -
Page 19: Why Errors Occur During Acquisition
When you use a digital signal, that signal must be at a high TTL level for at least 40 ns before any triggers will be accepted. The NI 5911 does not support delayed triggering. Note NI 5911 User Manual ni.com... -
Page 20: Analog Trigger Circuit
You can generate triggers on a rising or falling edge condition. For a more complete discussion of triggering, see Chapter 3, Common Functions and Examples, of your NI-SCOPE Software User Manual. © National Instruments Corporation NI 5911 User Manual... -
Page 21: Trigger Hold-Off
NI 5911 continues to acquire posttrigger samples if you have specified a posttrigger sample count. The acquired samples are placed into onboard memory. The number of posttrigger or pretrigger samples is only limited by the amount of onboard memory. NI 5911 User Manual 2-10 ni.com... -
Page 22: Multiple-Record Acquisitions
The NI 5911 has two digital lines that can accept a trigger, accept or generate a reference clock, or output a 1 kHz square wave. The function of each PFI line is independent. However, only one trigger source can be accepted during acquisition. © National Instruments Corporation 2-11 NI 5911 User Manual... -
Page 23: Pfi Lines As Inputs
Hardware arming cannot be used during an acquisition using multiple devices. For more information about synchronization, refer to your NI-SCOPE Software User Manual. NI 5911 User Manual 2-12 ni.com... - Page 24 15.5 Bits 1 MS/s Flexible Resolution 17.5 Bits 500 kS/s Flexible Resolution 18 Bits 200 kS/s Flexible Resolution 18.5 Bits 100 kS/s Flexible Resolution 19 Bits 50 kS/s Flexible Resolution 19.5 Bits © National Instruments Corporation NI 5911 User Manual...
- Page 25 1 MS 4 MS * 1<n<2 in oscilloscope mode Vertical sensitivity (input ranges) Input Range Noise Referred to Input ±10 V 174 dBfs/ ±5 V 168 dBfs/ ±2 V 160 dBfs/ ±1 V 154 dBfs/ NI 5911 User Manual ni.com...
- Page 26 Input protection ........±42 VDC (DC + peak AC) Input bias current ........±1 nA, typical at 25 °C Common-Mode Characteristics Impedance to chassis ground ....10 kΩ Common-mode rejection ratio ....CMRR > –70 dB, (F < 1 kHz) © National Instruments Corporation NI 5911 User Manual...
- Page 27 Noise Density Total Noise 100/n MS/s 100 MHz –120 dBfs/ –43 dBfs 3.75 MHz –135 dBfs/ –64 dBfs 12.5 MS/s 2 MHz –150 dBfs/ –83 dBfs 5 MS/s 1 MHz –155 dBfs/ –91 dBfs 2.5 MS/s NI 5911 User Manual ni.com...
- Page 28 160 dB 20 kS/s 100 dB 110 dB 160 dB 10 kS/s 100 dB 110 dB 160 dB Timebase System Reference clock........10 MHz Clock accuracy (as master) ....10 MHz ±50 ppm © National Instruments Corporation NI 5911 User Manual...
- Page 29 TRIG is fixed to ±5 V (without external attenuation) Coupling ..........AC/DC on CH0, TRIG Pretrigger depth ........1 to 16 million samples Posttrigger depth........1 to 16 million samples Holdoff time ...........5 µs – 171.85 s in increments of 40 ns NI 5911 User Manual ni.com...
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Page 30: Acquisition Modes
+12 VDC ..........100 mA –12 VDC ..........100 mA Physical Dimensions..........33.8 by 9.9 cm (13.3 by 3.9 in) I/O connectors Analog input CH0 ......BNC female Digital triggers ........ SMB female, 9-pin mini DIN © National Instruments Corporation NI 5911 User Manual... -
Page 31: Operating Environment
Interval..........1 week, or any time temperature changes beyond ±5 °C. Hardware detects temperature variations beyond calibration limits, which can also be queried by software. External...........Internal reference requires recalibration Interval..........1 year Warm-up time.........1 minute NI 5911 User Manual ni.com... - Page 32 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 33 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 34 – 6 µ- micro- milli- –3 kilo- mega- giga- Symbols percent positive of, or plus – negative of, or minus ° degree ± plus or minus Ω amperes analog to digital alternating current © National Instruments Corporation NI 5911 User Manual...
- Page 35 Typically, a bus is the expansion vehicle to which I/O or other devices are connected. Examples of PC buses are the PCI and ISA bus. Celsius channel pin or wire lead to which you apply or from which you read the analog or digital signal NI 5911 User Manual ni.com...
- Page 36 © National Instruments Corporation NI 5911 User Manual...
- Page 37 Instrument drivers are available in several forms, ranging from a function callable language to a virtual instrument (VI) in LabVIEW. interrupt a computer signal indicating that the CPU should suspend its current task to service a designated activity NI 5911 User Manual ni.com...
- Page 38 1,000, or 10 , used with units of measure such as volts, hertz, and meters 1,000 samples laboratory virtual instrument engineering workbench—a graphical LabVIEW programming ADE developed by National Instruments least significant bit meters megabytes of memory memory buffer see buffer...
- Page 39 132 Mbytes/s peak value the absolute maximum or minimum amplitude of a signal (AC + DC) posttriggering the technique to acquire a programmed number of samples after trigger conditions are met NI 5911 User Manual ni.com...
- Page 40 RTSI bus real-time system integration bus—the National Instruments timing bus that connects devices directly, by means of connectors on top of the boards, for precise synchronization of functions...
- Page 41 Nyquist frequency—can cause aliasing undersampling the number of output updates per second update rate NI 5911 User Manual ni.com...
- Page 42 © National Instruments Corporation NI 5911 User Manual...
- Page 43 2-5 connectors memory sample depth (table), A-2 BNC connector, 1-1 purpose and use, 2-6 DIN connector, 1-1 sampling rate specifications (table), A-1 location on front panel (figure), 1-2 SMB connector, 1-1 © National Instruments Corporation NI 5911 User Manual...
- Page 44 PFI lines, 2-11 multiple record acquisitions, 2-11 triggering and arming, 2-8 block diagram of NI 5911, 2-1 calibration, 2-7 differential programmable gain input National Instruments Web support, B-1 amplifier (PGIA) NI 5911 AC coupling, 2-4 See also hardware overview differential input, 2-2...
- Page 45 2-12 vertical sensitivity specifications, A-2 sampling methods—real-time and RIS, 2-5 sampling rate, flexible resolution mode (table), 2-6 Web support from National Instruments, B-1 Scope Soft Front Panel, 1-3 worldwide technical support, B-2 SMB connector, 1-1 © National Instruments Corporation...