National Instruments NI 6614 Bedienungsanleitung

NI 6614

User Manual

NI 6614 User Manual

August 2013

374038A-01

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This product was tested and complies with the regulatory requirements and limits for electromagnetic

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limit the frequency of any digital signal driven out a screw terminal connector of the BNC-2121

to not more than 1MHz.

Contents

About This Manual

Related Documentation .................................................................................................... xi

Chapter 1

Introduction

Installation ........................................................................................................................ 1-1

Accessories and Cables .................................................................................................... 1-1

Chapter 2

Digital I/O

Digital Input Data Acquisition Methods .......................................................................... 2-3

Software-Timed Acquisitions........................................................................... 2-3

Hardware-Timed Acquisitions ......................................................................... 2-3

Digital Input Triggering............................................................................................ 2-4

Digital Waveform Acquisition ................................................................................. 2-5

DI Sample Clock Signal ................................................................................... 2-5

DI Sample Clock Timebase Signal................................................................... 2-6

DI Start Trigger Signal ..................................................................................... 2-7

DI Reference Trigger Signal............................................................................. 2-8

DI Pause Trigger Signal ................................................................................... 2-9

Digital Output Data Generation Methods................................................................. 2-10

Software-Timed Generations............................................................................ 2-10

Hardware-Timed Generations .......................................................................... 2-10

Digital Output Triggering......................................................................................... 2-11

Digital Waveform Generation .................................................................................. 2-11

DO Sample Clock Signal.................................................................................. 2-12

DO Sample Clock Timebase Signal ................................................................. 2-13

DO Start Trigger Signal.................................................................................... 2-13

DO Pause Trigger Signal.................................................................................. 2-14

I/O Protection ........................................................................................................... 2-15

DI Change Detection ................................................................................................ 2-16

DI Change Detection Applications................................................................... 2-17

Digital Filtering ........................................................................................................ 2-17

Connecting Digital I/O Signals................................................................................. 2-19

Getting Started with DIO Applications in Software................................................. 2-20

Signal Integrity Considerations ........................................................................................ 2-21

Contents

viii |ni.com

Chapter 3

Counter Input

Counter Overview.............................................................................................................3-1

Counter Input Applications............................................................................................... 3-2

Edge Counting .......................................................................................................... 3-2

Channel Settings ............................................................................................... 3-2

Timing Settings.................................................................................................3-3

Trigger Settings................................................................................................. 3-4

Other Settings ................................................................................................... 3-6

Exporting a Terminal Count Signal .................................................................. 3-6

Cascading Counters .......................................................................................... 3-6

Pulse Measurement ................................................................................................... 3-6

Create Channel.................................................................................................. 3-7

Channel Settings ............................................................................................... 3-7

Timing Settings.................................................................................................3-8

Trigger Settings................................................................................................. 3-9

Other Settings ................................................................................................... 3-10

Semi-Period Measurement........................................................................................ 3-10

Settings.............................................................................................................. 3-11

Frequency Measurement........................................................................................... 3-11

Frequency Measurement Considerations.......................................................... 3-11

Frequency Measurement Methods.................................................................... 3-13

Period Measurement ................................................................................................. 3-19

Pulse-Width Measurement........................................................................................ 3-19

Channel Settings ............................................................................................... 3-20

Timing Settings.................................................................................................3-20

Trigger Settings................................................................................................. 3-21

Other Settings ................................................................................................... 3-22

Two-Edge Separation ...............................................................................................3-22

Channel Settings ............................................................................................... 3-23

Timing Settings.................................................................................................3-23

Trigger Settings................................................................................................. 3-24

Other Settings ................................................................................................... 3-25

Quadrature and Two-Pulse Encoder Overview ........................................................3-25

Quadrature Encoders.........................................................................................3-25

Two-Pulse Encoders ......................................................................................... 3-26

Angular Position Measurement ................................................................................ 3-27

Create Channel.................................................................................................. 3-27

Channel Settings ............................................................................................... 3-27

Timing Settings.................................................................................................3-28

Trigger Settings................................................................................................. 3-29

Other Settings ................................................................................................... 3-29

Linear Position Measurement ................................................................................... 3-29

NI 6614 User Manual

Chapter 4

Counter Output

Counter Output Applications............................................................................................ 4-1

Generating a Series of One or More Pulses.............................................................. 4-1

Create Channel ................................................................................................. 4-1

Channel Settings ............................................................................................... 4-2

Timing Settings................................................................................................. 4-2

Triggering Setting............................................................................................. 4-3

Generating a Waveform with Constant Frequency and Duty Cycle ........................ 4-4

Create Channel ................................................................................................. 4-4

Channel Settings ............................................................................................... 4-4

Timing Settings................................................................................................. 4-4

Triggering Setting............................................................................................. 4-4

Generating a Waveform with Variable Frequency and Duty Cycle......................... 4-5

Create Channel ................................................................................................. 4-6

Channel Settings ............................................................................................... 4-6

Timing Settings................................................................................................. 4-6

Triggering Settings ........................................................................................... 4-6

Buffer Considerations....................................................................................... 4-7

Generating Complex Digital Waveform or Timing Pattern ..................................... 4-7

Create Channel ................................................................................................. 4-8

Channel Settings ............................................................................................... 4-8

Timing Settings................................................................................................. 4-8

Triggering Setting............................................................................................. 4-8

Buffer Considerations....................................................................................... 4-9

Other Features........................................................................................................... 4-9

Frequency Division........................................................................................... 4-9

Frequency Generator ........................................................................................................ 4-9

Chapter 5

Counter Signal Routing

Default Routing ........................................................................................................ 5-1

Routing Options........................................................................................................ 5-3

Matching Routing Terminology ............................................................................... 5-3

Chapter 6

PFI

Using PFI Terminals as Timing Input Signals ................................................................. 6-2

Exporting Timing Output Signals Using PFI Terminals .................................................. 6-2

Using PFI Terminals as Static Digital I/Os ...................................................................... 6-3

Using PFI Terminals to Digital Detection Events ............................................................ 6-3

Connecting PFI Input Signals........................................................................................... 6-3

PFI Filters ......................................................................................................................... 6-3

I/O Protection ................................................................................................................... 6-5

Signal Integrity Considerations ........................................................................................ 6-5

Contents

x|ni.com

Chapter 7

Clocks

Clock Routing ...................................................................................................................7-1

100 MHz Timebase...................................................................................................7-1

20 MHz Timebase..................................................................................................... 7-1

100 kHz Timebase .................................................................................................... 7-2

External Reference Clock ......................................................................................... 7-2

10 MHz Reference Clock ......................................................................................... 7-2

PXIe_CLK100 .......................................................................................................... 7-3

PXIe_SYNC100........................................................................................................7-3

PXI_CLK10 ..............................................................................................................7-3

Synchronizing Multiple Devices ......................................................................................7-3

PXI Express Devices ................................................................................................ 7-3

High Precision Clock ........................................................................................................7-3

Using the OCXO to Overdrive the PXI Backplane Clock........................................ 7-4

Chapter 8

PXI Triggers

PXI_Trigger <0..7>...........................................................................................................8-1

PXI_STAR........................................................................................................................8-1

PXIe_DSTAR <A..C> ...................................................................................................... 8-1

Chapter 9

Bus Interface

Data Transfer Methods ..................................................................................................... 9-1

PXI Express Device Data Transfer Methods ............................................................9-1

PXI Express Considerations ............................................................................................. 9-2

PXI Express Clock and Trigger Signals ................................................................... 9-2

PXI Express ..............................................................................................................9-2

Chapter 10

Calibration

Onboard Clock Source......................................................................................................10-1

Appendix A

Pinout and Signal Descriptions

Appendix B

Technical Support and Professional Services

About This Manual

This manual describes the electrical and mechanical aspects of the National Instruments NI 6614

devices, and contains information about device operation and programming.

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