National Instruments NI PCI-5911 - Manuals

Contents NI PCI-5911 User Manual vi ni.com Memory ......................................................................................................................... 2-10 Triggering and Memory Usage ....................................................................... 2-10 Multi-Record Acqui...

© 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...

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 ...

© 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...

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....

© 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...

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...

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...

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...

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 ...

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...

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...

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...

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,...

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...

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 ...

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...

© 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; refe...

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 ...

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 Flex...

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 ...

Appendix A Specifications NI PCI-5911 User Manual A-6 ni.com Clock jitter ..............................................<75 pS rms , independent of reference clock source Clock compatibility ................................TTL for both input and output Sampling clock frequencies Conventional mode...

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...

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.........................

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...

© 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...

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