1. Manuals
  2. Brands
  3. National Instruments Manuals
  4. Network Card
  5. Network Adapter NI PXIe-6672
  6. User manual

National Instruments Network Adapter NI PXIe-6672 User Manual

National instruments network adapter user's manual
Hide thumbs Also See for Network Adapter NI PXIe-6672:
Table of Contents

Advertisement

Quick Links

Download this manual

PXI Express

NI PXIe-6672 User Manual
Timing and Synchronization Module for PXI Express
NI PXIe-6672 User Manual
June 2008
372185F-01

Advertisement

Table of Contents
loading

Related Manuals for National Instruments Network Adapter NI PXIe-6672

Summary of Contents for National Instruments Network Adapter NI PXIe-6672

  • Page 1: Pxi Express

    PXI Express NI PXIe-6672 User Manual Timing and Synchronization Module for PXI Express NI PXIe-6672 User Manual June 2008 372185F-01...
  • Page 2 Thailand 662 278 6777, Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545 For further support information, refer to the Technical Support and Professional Services appendix. To comment on National Instruments documentation, refer to the National Instruments Web site at and enter ni.com/info the info code feedback ©...

  • Page 3: Important Information

    Instruments Corporation. National Instruments respects the intellectual property of others, and we ask our users to do the same. NI software is protected by copyright and other intellectual property laws. Where NI software may be used to reproduce software or other materials belonging to others, you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction.

  • Page 4: Table Of Contents

    Contents About This Manual Conventions ...vii National Instruments Documentation ...viii Related Documentation...viii Chapter 1 Introduction What You Need to Get Started ...1-1 Unpacking ...1-2 Software Programming Choices ...1-2 Safety Information ...1-3 Chapter 2 Installing and Configuring Installing the Software ...2-1 Installing the Hardware...2-1...
  • Page 5 Contents Choosing the Type of Routing ... 3-15 Asynchronous Routing ... 3-16 Synchronous Routing ... 3-17 Generating a Single Pulse (Global Software Trigger) ... 3-18 Using the PXI_CLK10 PLL ... 3-19 Chapter 4 Calibration Factory Calibration... 4-1 TCXO Frequency ... 4-1 PXI_CLK10 Phase...

  • Page 6: About This Manual

    About This Manual Thank you for purchasing the National Instruments NI PXIe-6672 Timing and Synchronization Module. The NI PXIe-6672 enables you to pass PXI timing and trigger signals between two or more PXI Express chassis. The NI PXIe-6672 can generate and route clock signals between devices in multiple chassis, providing a method to synchronize multiple devices in a multichassis PXI Express system.

  • Page 7: National Instruments Documentation

    NI PXIe-6672 This phrase refers to the NI PXIe-6672 module for the PXI Express bus. National Instruments Documentation The NI PXIe-6672 User Manual is one piece of the documentation set for your measurement system. You could have any of several other documents describing your hardware and software.

  • Page 8: Introduction

    For information on using the driver software for synchronization, refer to the NI-Sync User Manual, which you can find on the NI-Sync CD or download from © National Instruments Corporation NI PXIe-6672 Timing and Triggering Module NI PXIe-6672 User Manual...

  • Page 9: Unpacking

    The LabVIEW Data Acquisition VI Library, a series of virtual instruments for using LabVIEW with National Instruments DAQ hardware, is included with LabVIEW. LabWindows/CVI is a complete ANSI C ADE that features an interactive user interface, code generation tools, and the LabWindows/CVI Data Acquisition and Easy I/O libraries.

  • Page 10: Safety Information

    Misuse of the product can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any way. If the product is damaged, return it to National Instruments for repair. Do not substitute parts or modify the product except as described in this document.
  • Page 11 Chapter 1 Introduction Operate the product at or below the installation category hardware label. Measurement circuits are subjected to working voltages and transient stresses (overvoltage) from the circuit to which they are connected during measurement or test. Installation categories establish standard impulse withstand voltage levels that commonly occur in electrical distribution systems.

  • Page 12: Installing And Configuring

    Figure 2-2. System Timing Device Slot Indicator Glyph on the NI PXIe-1062Q Chassis © National Instruments Corporation file that accompanies the NI-Sync CD for readme.htm Power off and unplug the chassis.

  • Page 13: Configuring The Module

    Chapter 2 Installing and Configuring The slot number printed on the glyph may vary from chassis to chassis. Note The circle inside of the square indicates that the slot may also be used as a PXI Express peripheral slot. The NI PXIe-6672 is now installed. Configuring the Module The NI PXIe-6672 is completely software configurable.

  • Page 14: Hardware Overview

    Hardware Overview This chapter presents an overview of the hardware functions of the NI PXIe-6672. Figure 3-1 provides a functional overview of the NI PXIe-6672 hardware. © National Instruments Corporation NI PXIe-6672 User Manual...
  • Page 15 Chapter 3 Hardware Overview AC Coupled CLKIN Clock Detector TCXO Clock CLKOUT PFI 0 Driver/ Comparator PFI 0 Threshold PFI 1 Driver/ Comparator PFI 1 Threshold PFI 2 Driver/ Comparator PFI 2 Threshold PFI 3 Driver/ Comparator PFI 3 Threshold PFI 4 Driver/ Comparator...

  • Page 16: Ni Pxie-6672 Front Panel

    NI PXIe-6672 Front Panel Figure 3-2 shows the connectors and LEDs on the front panel of the NI PXIe-6672. 1 Access LED 2 Active LED 3 CLKOUT Connector © National Instruments Corporation Chapter 3 NI PXIe-6672 Timing Module ACCESS ACTIVE...

  • Page 17: Access Led

    Chapter 3 Hardware Overview Access LED The Access LED indicates the communication status of the NI PXIe-6672. Refer to Figure 3-2 for the location of the Access LED. Table 3-1 summarizes what the Access LED colors represent. Active LED The Active LED can indicate an error or phase-locked loop (PLL) activity. You can change the Active LED to amber, unless an error overrides the selection.

  • Page 18: Connectors

    The NI PXIe-6672 perform two broad functions: • • © National Instruments Corporation CLKIN—Clock Input. This connector supplies the module with a clock that can be programmatically routed to the onboard PLL for use as a reference or routed directly to the PXI backplane (PXI_CLK10_IN) for distribution to the other modules in the chassis.
  • Page 19 Chapter 3 Hardware Overview Table 3-3 outlines the function and direction of the signals discussed in detail in the remainder of this chapter. Signal Name Direction PXI_CLK10_IN PXI_CLK10 TCXO Clock CLKIN CLKOUT DDS Clock PXI_STAR <0..16> In/Out PFI <0..5> In/Out PXI_TRIG <0..7>...

  • Page 20: Clock Generation

    The source for this update signal is either immediate (DDS starts outputting the programmed frequency as soon as software programs it) or one of the eight PXI triggers. When one © National Instruments Corporation Chapter 3 Hardware Overview...

  • Page 21: Pxi_Clk10 And Tcxo

    Chapter 3 Hardware Overview of the PXI trigger lines is used as the source for the update, frequency generation will not start until a rising edge occurs on the PXI trigger selected. Note NI-Sync software defaults to an immediate update. If a PXI trigger is used instead, the user must specify the update signal source before setting any of the other DDS properties.

  • Page 22: Routing Signals

    CLKIN may be any multiple of 1 MHz to 105 MHz. In addition, CLKIN is a valid source for PXI_Star. The CLKOUT SMB on the NI PXIe-6672 may also be used to route the TCXO, PXI_CLK10, or DDS Clock. © National Instruments Corporation Using the PXI_CLK10 PLL section. Chapter 3...
  • Page 23 Chapter 3 Hardware Overview Figures 3-3 and 3-4 summarize the routing features of the NI PXIe-6672. The remainder of this chapter details the capabilities and constraints of the routing architecture. Selection PFI 0 Circuitry Selection PFI 1 Circuitry Selection PFI 5 Circuitry PFI 0 PXI_CLK10...

  • Page 24: Determining Sources And Destinations

    In addition, synchronous routing operations must also define a third signal known as the synchronization clock. Refer to the the Type of Routing asynchronous routing. © National Instruments Corporation Figure 3-4. Signal Selection Circuitry Diagram section for more information on synchronous versus 3-11...

  • Page 25: Using Front Panel Pfis As Inputs

    Chapter 3 Hardware Overview Table 3-4 summarizes the sources and destinations of the NI PXIe-6672. The destinations are listed in the horizontal heading row, and the sources are listed in the column at the far left. A ✓ in a cell indicates that the source and destination combination defined by that cell is a valid routing combination.

  • Page 26: Using Front Panel Pfis As Outputs

    • The PFI synchronization clock may be any of the following signals: • • • • • © National Instruments Corporation Another PFI <0..5> PXI triggers <0..7> (PXI_TRIG <0..7>) PXI_STAR <0..16> Global software trigger PFI synchronization clock DDS clock PXI_CLK10...

  • Page 27: Using The Pxi Triggers

    Chapter 3 Hardware Overview Refer to the the synchronization clock. Note The PFI synchronization clock is the same for all routing operations in which PFI <0..5> is defined as the output, although the divide-down ratio for this clock (full rate, first divider, second divider) may be chosen on a per route basis.

  • Page 28: Using The Pxi Star Triggers

    The NI PXIe-6672 routes signals in one of two ways: asynchronously or synchronously. The following sections describe the two routing types and the considerations for choosing each type. © National Instruments Corporation PFI <0..5> PXI triggers <0..7> (PXI_TRIG <0..7>) Another PXI star trigger line (PXI_STAR <0..16>)

  • Page 29: Asynchronous Routing

    Chapter 3 Hardware Overview Asynchronous Routing Asynchronous routing is the most straightforward method of routing signals. Any asynchronous route can be defined in terms of two signal locations: a source and a destination. A digital pulse or train comes in on the source and is propagated to the destination.

  • Page 30: Synchronous Routing

    If the delays through the system are such that an asynchronous trigger might arrive near the edge of the receiver clock, the receiver might see the signal in the first clock cycle, or it might see it in © National Instruments Corporation Trigger Input Synchronization...

  • Page 31: Generating A Single Pulse (Global Software Trigger)

    Chapter 3 Hardware Overview the second clock cycle. However, by synchronizing the signal, you can eliminate the ambiguity, and the signal will always be seen in the second clock cycle. One useful feature of synchronous routing is that the signal can be propagated on either the rising or falling edge of the synchronization clock.

  • Page 32: Using The Pxi_Clk10 Pll

    PXI backplane clock: • • © National Instruments Corporation The first option is to replace PXI_CLK10 directly with the TCXO output on the NI PXIe-6672. This oscillator is a more stable and accurate reference than the native backplane clock.
  • Page 33 Chapter 3 Hardware Overview • NI PXIe-6672 User Manual If CLKIN is 10 MHz, the NI PXIe-6672 can compensate for distribution delays in the backplane. The feedback in the PLL comes from PXI_CLK10. This PLL makes it possible for the NI PXIe-6672 to align clock edges at CLKIN with the edges of PXI_CLK10 that the modules receive.

  • Page 34: Calibration

    To start the DDS reliably, the DDS start trigger must arrive within a certain window of time. The phase of the DDS start trigger is controlled by this constant to meet the setup and hold-time requirements of the DDS. © National Instruments Corporation NI PXIe-6672 User Manual...

  • Page 35: Dds Initial Phase

    Chapter 4 Calibration DDS Initial Phase The phase of the DDS output is adjusted using this constant so that the DDS outputs from multiple NI PXIe-6672 modules are aligned. Additional Information Refer to NI calibration services. NI PXIe-6672 User Manual for additional information on ni.com/calibration ni.com...
  • Page 36 Functional operation of the device outside the conditions indicated in the operational parts of the specification is not implied. This is a requirement of the PXI specification. © National Instruments Corporation ... 1 MHz to 105 MHz, DC ... ±20 V AC ...
  • Page 37 Appendix A Specifications Jitter added to CLKIN Duty cycle distortion of CLKIN to PXI_CLK10_IN without PLL ...±1%, max Required input duty cycle when using PLL...45 to 55% CLKOUT Characteristics Output frequency Duty cycle...43 to 55% Output impedance...50 Ω, nominal Output coupling ...AC Amplitude, software configurable to two voltage levels (low and high drive) The lower limit is load dependent because of the AC coupling.
  • Page 38 PXI_CLK10 are phase locked with ±1 ns max phase difference. Refer to the Hardware Overview, for more details. © National Instruments Corporation Low drive ... 0.5 ns min, High drive ... 0.5 ns min, Voltage level ... 0 to 4.3 V, software-selectable Voltage resolution...
  • Page 39 Appendix A Specifications Output Characteristics Frequency range ...DC to 105 MHz Output impedance...50 Ω, nominal Output coupling ...DC Voltage level...0 to 1.6 V into 50 Ω; Absolute maximum applied voltage PXI_CLK10 synchronized trigger clock to out time, t Output-to-output skew, synchronous...500 ps, typical PXI_STAR Trigger Characteristics PXI_STAR <0..16>...
  • Page 40 The DDS frequency inherits the relative frequency of PXI_CLK10. For example, if you route the TCXO to PXI_CLK10, the DDS output inherits the same relative frequency accuracy as the TCXO output. © National Instruments Corporation PXI_TRIG <0..7> to PFI <0..5> output ... 15 to 22 ns, typical ...

  • Page 41: Power Requirements

    Appendix A Specifications Recommended maximum cable length Weight ...0.459 lb (208 g) Power Requirements +3.3 V ...800 mA, max +12 V ...700 mA, max Environment Maximum altitude...2,000 m (800 mbar) Pollution Degree ...2 Indoor use only. Caution When required, clean the NI PXIe-6672 with a soft nonmetallic brush. Make sure that the device is completely dry and free from contaminants before returning it to service.

  • Page 42: Storage Environment

    , search by model number or product line, and click the appropriate link certification in the Certification column. © National Instruments Corporation Operating ... 5 to 500 Hz, 0.3 g Nonoperating ... 5 to 500 Hz, 2.4 g • IEC 61010-1, EN 61010-1 •...

  • Page 43: Electromagnetic Compatibility

    Certification column. Environmental Management National Instruments is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers.
  • Page 44 Waste Electrical and Electronic Equipment (WEEE) At the end of their life cycle, all products must be sent to a WEEE recycling EU Customers center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm RoHS...
  • Page 45 Technical Support and Professional Services Visit the following sections of the award-winning National Instruments Web site at • • • © National Instruments Corporation for technical support and professional services: ni.com Support—Technical support resources at the following: – Self-Help Technical Resources—For answers and solutions,...
  • Page 46 Appendix B Technical Support and Professional Services • • If you searched your local office or NI corporate headquarters. Phone numbers for our worldwide offices are listed at the front of this manual. You also can visit the Worldwide Offices section of office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events.
  • Page 47 A part where numbers are totaled or stored. application development environment asynchronous A property of an event that occurs at an arbitrary time, without synchronization to a reference clock. © National Instruments Corporation Value –12 –9 – 6 –3...
  • Page 48 Glossary backplane An assembly, typically a printed circuit board (PCB), with connectors and signal paths that bus the connector pins. The group of conductors that interconnect individual circuitry in a computer. Typically, a bus is the expansion vehicle to which I/O or other devices are connected.
  • Page 49 The physical front panel of an instrument or other hardware . hertz—the number of scans read or updates written per second. inch or inches jitter The rapid variation of a clock or sampling frequency from an ideal constant frequency. © National Instruments Corporation Glossary NI PXIe-6672 User Manual...
  • Page 50 The requesting or controlling device in a master/slave configuration. Measurement & A controlled centralized configuration environment that allows you to Automation Explorer configure all of your National Instruments DAQ, GPIB, IMAQ, IVI, (MAX) Motion, VISA, and VXI devices. NI-DAQ National Instruments driver software for DAQ hardware.
  • Page 51 The amount of time required for a signal to pass through a circuit. A rugged, open system for modular instrumentation based on CompactPCI, with special mechanical, electrical, and software features. The PXIbus standard was originally developed by National Instruments in 1997, and is now managed by the PXIbus Systems Alliance. PXI Express An open system for modular instrumentation based on PXI and CompactPCI Express.
  • Page 52 Glossary seconds skew The actual time difference between two events that would ideally occur simultaneously. Inter-channel skew is an example of the time differences introduced by different characteristics of multiple channels. Skew can occur between channels on one module, or between channels on separate modules (intermodule skew).
  • Page 53 (NI resources), B-2 CE compliance, specifications, A-8 changing the Active LED color (tip), 3-4 CLKIN connector description, 3-5 location (diagram), 3-3 specifications, A-1 © National Instruments Corporation CLKOUT connector description, 3-5 location (diagram), 3-3 signal description (table), 3-6 specifications, A-2 clock generation...
  • Page 54 Index documentation conventions used in manual, vii NI resources, B-1 related documentation, viii drivers (NI resources), B-1 electromagnetic compatibility, A-8 equipment, getting started, 1-1 examples (NI resources), B-1 factory calibration, 4-1 frequency tuning word, 3-7 front panel See also CLKIN connector; CLKOUT connector;...
  • Page 55 National Instruments support and services, B-1 NI PXI-6653, parts locator diagram, 3-3 NI PXI-665x configuration, 2-2 connectors, 3-5 functional overview, 3-5 installation hardware, 2-1 software, 2-1 NI support and services, B-1 operating environment specifications, A-6 PFI <0..5> connector description, 3-5...
  • Page 56 Index PXI_Trig/PXI_Star synchronization clock possible sources, 3-14 using the PXI triggers, 3-14 reflections, recommended cable configuration, 3-13 related documentation, viii resistors, terminating signals (note), 3-12 routing architecture (figure), 3-10 routing signals front panel triggers using as inputs, 3-12 using as outputs, 3-13 generating a single pulse (trigger), 3-18 overview, 3-9 possible sources and destinations...
  • Page 57 (note), 3-12 threshold, voltage, 3-12 training and certification (NI resources), B-1 trigger bus. See PXI_TRIG <0..7> troubleshooting (NI resources), B-1 unpacking the device, 1-2 © National Instruments Corporation voltage thresholds, programming, 3-12 Web resources, B-1 Index NI PXIe-6672 User Manual...

Table of Contents