National Instruments NI 5911 - Manuals

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...

© National Instruments Corporation vii NI 5911 User Manual Contents Chapter 1Taking Measurements with the NI 5911 Installing the NI 5911 .................................................................................................... 1-1Connecting Signals ...........................................

Contents NI 5911 User Manual viii ni.com RTSI Bus and Clock PFI ............................................................................................... 2-11 PFI Lines ......................................................................................................... 2-11 PFI Lines as I...

© National Instruments Corporation 1-1 NI 5911 User Manual 1 Taking Measurementswith the NI 5911 Thank you for buying a National Instruments (NI) 5911 digitizer, featuringthe FLEX ADC. This chapter provides information on installing,connecting signals to, and acquiring data from your NI 5911. Instal...

Chapter 1 Taking Measurements with the NI 5911 © National Instruments Corporation 1-3 NI 5911 User Manual Acquiring Data with Your NI 5911 You can acquire data either programmatically—by writing an applicationfor your NI 5911—or interactively with the Scope Soft Front Panel. Programmatically Control...

© National Instruments Corporation 2-1 NI 5911 User Manual 2 Hardware Overview This chapter includes an overview of the NI 5911, explains the operation ofeach functional unit making up your NI 5911, and describes the signalconnections. Figure 2-1 shows a block diagram of the NI 5911. Figure 2-1. NI ...

Chapter 2 Hardware Overview NI 5911 User Manual 2-2 ni.com Differential Input When measuring high dynamic range signals, ground noise is often aproblem. The PGIA of the NI 5911 allows you to make noise-free signalmeasurements. The PGIA differential amplifier efficiently rejects anynoise present on t...

Chapter 2 Hardware Overview © National Instruments Corporation 2-3 NI 5911 User Manual Input Ranges To optimize the ADC resolution, you can select different gains for thePGIA. In this way, you can scale your input signal to match the full inputrange of the converter. The NI 5911 PGIA offers seven di...

Chapter 2 Hardware Overview NI 5911 User Manual 2-4 ni.com if the device has 1 M Ω output impedance, your measured signal will be one-half the actual signal value. Input Bias The inputs of the PGIA typically draw an input bias current of 1 nA at25 ° C. Attaching a device with a very high source impe...

Chapter 2 Hardware Overview © National Instruments Corporation 2-5 NI 5911 User Manual analysis, distortion analysis, and other measurements for which highresolution is crucial. Oscilloscope Mode The ADC converts at a constant rate of 100 MS/s, but you can choose tostore only a fraction of these sam...

Chapter 2 Hardware Overview NI 5911 User Manual 2-6 ni.com Like any other type of converter that uses noise shaping to enhanceresolution, the frequency response of the converter is only flat to itsmaximum useful bandwidth. The NI 5911 has a bandwidth of 4 MHz.Beyond this frequency, there is a span w...

Chapter 2 Hardware Overview © National Instruments Corporation 2-7 NI 5911 User Manual Calibration The NI 5911 can be calibrated for very high accuracy and resolution dueto an advanced calibration scheme. There are two different types ofcalibration: internal, or self, calibration and external calibr...

Chapter 2 Hardware Overview NI 5911 User Manual 2-8 ni.com • The linearity of the ADC is calibrated using an internal sinewavegenerator 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 5911 ...

Chapter 2 Hardware Overview © National Instruments Corporation 2-9 NI 5911 User Manual Figure 2-3. Trigger Sources Analog Trigger Circuit The analog trigger on the NI 5911 operates by comparing the currentanalog input to an onboard threshold voltage. This threshold voltage is thetrigger value, and c...

Chapter 2 Hardware Overview NI 5911 User Manual 2-10 ni.com Trigger Hold-Off Trigger hold-off is the minimum length of time (in seconds) from anaccepted trigger to the start of the next record. In other words, when atrigger is accepted, the trigger counter is loaded with the desired hold-offtime. Af...

Chapter 2 Hardware Overview © National Instruments Corporation 2-11 NI 5911 User Manual Multiple-Record Acquisitions After the trigger has been received and the posttrigger samples have beenstored, the NI 5911 can be configured to begin another acquisition that isstored in another onboard memory rec...

Chapter 2 Hardware Overview NI 5911 User Manual 2-12 ni.com PFI Lines as Inputs You can select PFI1 or PFI2 as inputs for a trigger or a reference clock.Please see the Synchronization section below for more information about the use of reference clocks in the NI 5911. PFI Lines as Outputs You can se...

© National Instruments Corporation A-1 NI 5911 User Manual A Specifications This appendix lists the specifications of the NI 5911. These specificationsare typical at 25 ° C unless otherwise stated. Acquisition System Bandwidth .............................................. 100 MHz maximum, see Table...

Appendix A Specifications © National Instruments Corporation A-3 NI 5911 User Manual Acquisition Characteristics Accuracy DC gain accuracy ................................... ±0.05% signal ±0.0001% fs for all input ranges at 1 MS/s inflexible resolution mode DC offset accuracy .........................

Appendix A Specifications NI 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 Oscilloscope 100 MHz ±3 dB N/A 12.5 MS/s Flexible Resolution 3.75 MHz ±0.2 dB –60 dB 5 MS/s Flexible...

Appendix A Specifications © National Instruments Corporation A-5 NI 5911 User Manual Distortion Timebase System Reference clock ...................................... 10 MHz Clock accuracy (as master) .................... 10 MHz ±50 ppm 1 MS/s 400 kHz –160 dBfs/ –104 dBfs 500 kS/s 200 kHz –160 dBfs/...

Appendix A Specifications NI 5911 User Manual A-6 ni.com Clock input tolerance (as slave)..............10 MHz ±100 ppm Clock jitter ..............................................<75 pS rms, independent of reference clock source Clock compatibility ...............................TTL for both input...

Appendix A Specifications © National Instruments Corporation A-7 NI 5911 User Manual Sensitivity............................................... 170 steps in full-scale voltage range TRIG input range ................................... ±5 V (without external attenuation) TRIG input impedance ...........

Appendix A Specifications NI 5911 User Manual A-8 ni.com Operating Environment Note Multiple NI 5911s in the same computer may raise operating temperatures beyond specification and give rise to imprecise data. NI strongly recommends leaving an emptyPCI slot between multiple NI 5911s or adding a fan....

© National Instruments Corporation B-1 NI 5911 User Manual B Technical Support Resources Web Support National Instruments Web support is your first stop for help in solvinginstallation, configuration, and application problems and questions. Onlineproblem-solving and diagnostic resources include freq...

Appendix B Technical Support Resources NI 5911 User Manual B-2 ni.com Worldwide Support National Instruments has offices located around the world to help addressyour support needs. You can access our branch office Web sites from theWorldwide Offices section of ni.com . Branch office Web sites provid...

© National Instruments Corporation G-1 NI 5911 User Manual Glossary Prefix Meanings 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...

© National Instruments Corporation I-1 NI 5911 User Manual Index A AC coupling, 2-4accuracy characteristics, A-3acquisition multiple record, 2-11Scope Soft Front Panel, 1-3 acquisition characteristics specifications accuracy, A-3common-mode characteristics, A-3distortion, A-5dynamic range, A-4filter...