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PXI Express
NI PXIe-6672 User Manual
Timing and Synchronization Module for PXI Express
NI PXIe-6672 User Manual
June 2008
372185F-01
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Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 662 457990-0, Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599, Canada 800 433 3488, China 86 21 5050 9800, Czech Republic 420 224 235 774, Denmark 45 45 76 26 00, Finland 358 (0) 9 725 72511, France 01 57 66 24 24, Germany 49 89 7413130, India 91 80 411900
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Important Information Warranty The NI PXIe-6672 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. The media on which you receive National Instruments software are warranted not to fail to execute programming instructions
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Contents About This Manual Conventions ...................................................................................................................vii National Instruments Documentation ............................................................................viii Related Documentation..................................................................................................viii Chapter 1 Introduction What You Need to Get Started ..................................................
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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 .........................................................................
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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. This manual describes the electrical and mechanical aspects of the NI PXIe-6672 and conta
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About This Manual monospace Text in this font denotes text or characters that you should enter from the keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, programs, subprograms, subroutines, device names, functions, operations, variables, filenames, and extensions. NI PXIe-6672 This phrase refers to the NI PXIe-6672 module for the PXI Express bus. National Instruments Documentation The NI PXIe
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1 Introduction The NI PXIe-6672 timing and triggering module enables you to pass PXI timing signals between two or more PXI Express chassis. The NI PXIe-6672 module generates and routes clock signals between devices in multiple chassis, providing a method for synchronizing multiple devices in a PXI Express system. What You Need to Get Started To set up and use the NI PXIe-6672, you need the following items: ❑ NI PXIe-6672 Timing and Triggering Module ❑ NI PXIe-6672 User Manual ❑ NI-Sync CD ❑
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Chapter 1 Introduction Unpacking The NI PXIe-6672 is shipped in an antistatic package to prevent electrostatic damage to the module. Electrostatic discharge (ESD) can damage several components on the module. Caution Never touch the exposed pins of connectors. To avoid such damage in handling the module, take the following precautions: � Ground yourself using a grounding strap or by touching a grounded object. � Touch the antistatic package to a metal part of the computer chassis before remo
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Chapter 1 Introduction Safety Information The following section contains important safety information that you must follow when installing and using the product. Do not operate the product in a manner not specified in this document. 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 prod
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Chapter 1 Introduction 1 Operate the product at or below the installation category marked on the 2 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. The following is a description of installation categories: � Installation Category
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2 Installing and Configuring This chapter describes how to install the NI PXIe-6672 hardware and software and how to configure the device. Installing the Software Refer to the readme.htm file that accompanies the NI-Sync CD for software installation directions. Note Be sure to install the driver software before installing the NI PXIe-6672 hardware. Installing the Hardware The following are general installation instructions. Consult the chassis user manual or technical reference manual for spe
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Chapter 2 Installing and Configuring Note The slot number printed on the glyph may vary from chassis to chassis. The circle inside of the square indicates that the slot may also be used as a PXI Express peripheral slot. 3. Remove the filler panel for the PXI slot you located in step 2. 4. Ground yourself using a grounding strap or by holding a grounded object. Follow the ESD protection precautions described in the Unpacking section of Chapter 1, Introduction. 5. Remove any packing material fr
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3 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 3-1 NI PXIe-6672 User Manual
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Chapter 3 Hardware Overview PXI_CLK10_IN AC Coupled CLKIN Clock Detector PLL TCXO TCXO Calibration DAC TCXO PXI_CLK10 Clock CLKOUT CLKIN DDS DDS Clock Driver/ PFI 0 PXI_STAR<0..16> Comparator CLOCK and PFI 0 TRIGGER PXI_TRIG<0..7> Threshold Routing DAC Driver/ PFI 1 Comparator PFI 1 Threshold DAC PFI 2 Driver/ PCI Interface Comparator PFI 2 Threshold DAC PFI 3 Driver/ Comparator PFI 3 Threshold DAC Driver/ PFI 4 Comparator PFI 4 Threshold DAC Driver/ PFI 5 Comparator PFI 5 Threshold DAC Figure 3
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Chapter 3 Hardware Overview NI PXIe-6672 Front Panel Figure 3-2 shows the connectors and LEDs on the front panel of the NI PXIe-6672. NI PXIe-6672 Timing Module 1 2 ACCESS ACTIVE CLK 3 OUT CLK 4 IN PFI 0 PFI 1 PFI 2 5 PFI 3 PFI 4 PFI 5 1Access LED 4 CLKIN Connector 2 Active LED 5 PFI <0..5> Connectors 3 CLKOUT Connector Figure 3-2. NI PXIe-6672 Front Panel © National Instruments Corporation 3-3 NI PXIe-6672 User Manual
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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. Table 3-1. Access LED Color Indication Color Status Off Module is not yet functional. Green Driver has initialized the module. Amber Module is being accessed. The Access LED flashes amber for 50 ms when the module is accessed. Active LED The Active LED can indicate an e
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Chapter 3 Hardware Overview Connectors This section describes the connectors on the front panel of the NI PXIe-6672. � 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. � CLKOUT—Clock Output. This connector is used to source a clock that can be routed programmatically from the temperature-
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Chapter 3 Hardware Overview Table 3-3 outlines the function and direction of the signals discussed in detail in the remainder of this chapter. Table 3-3. Signal Descriptions Signal Name Direction Description PXI_CLK10_IN Out This is a signal that can replace the native 10 MHz oscillator on the PXI backplane. PXI_CLK10_IN may originate from the onboard TCXO or from an external source. PXI_CLK10 In This signal is the PXI 10 MHz backplane clock. By default, this signal is the output of the nat
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Chapter 3 Hardware Overview The remainder of this chapter describes how these signals are used, acquired, and generated by the NI PXIe-6672 hardware, and explains how you can route the signals between various locations to synchronize multiple measurement devices and PXI chassis. Clock Generation The NI PXIe-6672 can generate two types of clock signals. The first clock is generated using the onboard DDS chip, and the second is generated with a precise 10 MHz oscillator. The following section
