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PXI Express NI PXIe-6672 User Manual Timing and Synchronization Module for PXI E xpress NI PXIe-6672 User Manual June 2008 372185F-01.
Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Aust in, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide O.
Important Information Warranty The NI PXIe-6672 is warranted against def ects in materials and workmanship for a peri od of one year from th e date of ship ment, as evidenced by receipts or other documentati on. National Instruments wil l, at its option, repair or replace equipment that proves to be defect ive during the warranty period.
© National Instruments Corporation v NI PXIe-6672 User Manual Contents About This Manual Conventions ............ .............. .............. .............. .............. .............. ............... ................ .. v ii National Instruments D ocumentatio n .
Contents NI PXIe-6672 User Manual vi ni.com Choosing the Type of Routing .................. ...... .............. .............. .............. ...... 3-15 Asynchronous Routing ....... ........................................................ ...... 3-16 Synchronous Routing .
© National Instruments Corporation vii NI PXIe-6672 User Manual About This Manual Thank you for purchasing t he National Instruments NI PXIe-6 672 Timing and Synchronization Module. The NI PXIe-6672 enables you to pass PXI timing and trigger signals betw een two or more PXI Express chassis.
About This Manual NI PXIe-6672 User Manual viii ni.com monospace T ext in this font denotes text or ch aracters that you should ent er from the keyboard, sections of code, programming examples, and syntax examples.
© National Instruments Corporatio n 1-1 NI PXIe-6672 User Manual 1 Introduction The NI PXIe-6672 timing and triggering modu le enables you to pass PXI timing signal s between two or more PXI Express chassis.
Chapter 1 Introduction NI PXIe-6672 User Manual 1-2 ni.com Unpacking The NI PXIe-6672 is shipped in an antistatic package to prevent electrostatic damage to the modu le. Electrostatic discharge (ESD) can damage several components on the module. Caution Never touch the exposed pins of connectors.
Chapter 1 Introduction © National Instruments Corporatio n 1-3 NI PXIe-6672 User Manual Safety Information The following section contains important safety info rmation that you must follow when installi ng and using the product. Do not operate the product in a manner not specified in this document.
Chapter 1 Introduction NI PXIe-6672 User Manual 1-4 ni.com Operate the product at or belo w the installation ca tegory 1 marked on the hardware label. Measurement circuits are subjected to working voltages 2 and transient stresses (ov erv oltage) from the circuit to which they are connected during measurement or test .
© National Instruments Corporatio n 2-1 NI PXIe-6672 User Manual 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.
Chapter 2 Installing and Co nfiguring NI PXIe-6672 User Manual 2-2 ni.com Note The slot number prin ted on the gl yph 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.
© National Instruments Corporatio n 3-1 NI PXIe-6672 User Manual 3 Hardware Over view This chapter presents an overview of the hardware functions of the NI PXIe-6672.
Chapter 3 Hardware Overv iew NI PXIe-6672 User Manual 3-2 ni.com Figure 3-1. Fu nctional Overview of the NI PXIe-6672 CLOCK and TRIGGER Routing PCI Interface PXI PCI PXI_ST AR<0.
Chapter 3 Hardware Overview © National Instruments Corporatio n 3-3 NI PXIe-6672 User Manual NI PXIe-6672 Front Panel Figure 3-2 shows the connectors and LEDs on the front pane l of the NI PXIe-6672. Figure 3-2. NI PXIe-6672 Front Panel 1A c c e ss LED 2 Active LED 3 CLKOUT Connector 4 CLKIN Connector 5 PFI <0.
Chapter 3 Hardware Overv iew NI PXIe-6672 User Manual 3-4 ni.com Access LED The Access LED indicates the communi cation status of the NI PXIe-66 72. Refer to Figure 3-2 for the locatio n of the Access LED. T able 3-1 summarizes what th e Access LED colors represent.
Chapter 3 Hardware Overview © National Instruments Corporatio n 3-5 NI PXIe-6672 User Manual Connectors This section describes the connect ors on the front pan el of the NI PXIe-6672.
Chapter 3 Hardware Overv iew NI PXIe-6672 User Manual 3-6 ni.com T able 3-3 outlines the function and directio n of the signals discussed in detail in the remainder of this chapter .
Chapter 3 Hardware Overview © National Instruments Corporatio n 3-7 NI PXIe-6672 User Manual The remainder of this chapter desc ribes ho w these signals are used, acquired, and generated by the NI PXIe-6672 hardware, and e xplains ho w you can route the signals between v arious locations to synchronize multiple measurement devices and PXI chassis.
Chapter 3 Hardware Overv iew NI PXIe-6672 User Manual 3-8 ni.com of the PXI trigger lines is used as the source for the update, frequen cy generation will not start until a rising edge occurs on the PXI trigger selected. Note NI-Sync software defaults to an immediate update.
Chapter 3 Hardware Overview © National Instruments Corporatio n 3-9 NI PXIe-6672 User Manual clock; this feature must be explic itly enabled in software. The TCXO output also can be routed out to the CLK OUT connector . In addition to replaci ng the nativ e b ackplane clock directly , the TCXO can phase lock to an external frequency source.
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-10 ni.com Figures 3-3 and 3-4 summarize the routing features of the NI PXIe-6672. The remainder of this chapter details the capabi lities and constraints of the routing architecture. Figure 3-3.
Chapter 3 Hardware Overview © National Instruments Corporation 3-11 NI PXIe-6672 User Manual Figure 3-4 provides a more detailed view of the Selection Circuitry referenced in Figure 3-3.
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-12 ni.com T able 3-4 summarizes the sources an d destinations of the N I PXIe-6672. The destinations are listed in the ho rizontal heading ro w , and the sources are listed in the column at the far left.
Chapter 3 Hardware Overview © National Instruments Corporation 3-13 NI PXIe-6672 User Manual PFI connectors to the voltage output of software-programmable D A Cs. The thresholds for the PFI lines are in di vidually progr ammable, whi ch is useful if you are importing signals from multiple sources with different voltage swings.
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-14 ni.com Refer to the Choosing the Type of Ro uting section for more inf ormation on the synchronization clock. Note The PFI synchronization clock is the same for all ro uting operations in which PFI <0.
Chapter 3 Hardware Over view © National Instruments Corporation 3-15 NI PXIe-6672 User Manual Refer to the Choosing the Type of Routing section fo r more information about the synchronization clock. Note The PXI_T rig/PXI_Star synchronization clock is the same for all routing operations in which PXI_TRIG <0.
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-16 ni.com Asynchronous Routing Asynchronous ro uting is the most straightforward m ethod of routing signals. Any asynchronous route can be defined in terms of two signal locations: a source and a destination.
Chapter 3 Hardware Overview © National Instruments Corporation 3-17 NI PXIe-6672 User Manual Synchronous Routing A synchronous routing o peration is defined i n terms of three signal locations: a source, a destination, and a synchronization clock .
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-18 ni.com the second clock cycle. Ho wev er , b y synchronizing the signal, yo u can eliminate the ambiguity , and the signal will always be seen in the second clock cycle.
Chapter 3 Hardware Overview © National Instruments Corporation 3-19 NI PXIe-6672 User Manual destinations with significantly different propagation delays. By delaying the pulse on the routes with shorter path s, you can compensate for the propagation delay .
Chapter 3 Hardware Overv iew NI PXIe-6672 User M anual 3-20 ni.com • If CLKIN is 10 MHz, the NI PXIe-6672 can compensate for distribution delays in the backplan e. The feedback in the PLL comes from PXI_CLK10. This PLL makes it possible for the NI PXIe-6672 to align clock edges at CLK IN with the edges of PXI_CLK10 that t he modules receiv e.
© National Instruments Corporatio n 4-1 NI PXIe-6672 User Manual 4 Calibration This chapter discusses the cal ibration of the NI PXIe-6672. Calibration consists of ve rifying the measurement accuracy of a de vice and correcting for any measurement er ror .
Chapter 4 Calibr ation NI PXIe-6672 User Manual 4-2 ni.com DDS Initial Phase The phase of the DDS output is adjusted using this constant so that th e DDS outputs from multiple NI PX Ie-6672 modules are aligned. Additional Information Refer to ni.com/calibration for additional information o n NI calibration services.
© National Instruments Corporation A-1 NI PXIe-66 72 User Manual A Specifications CLKIN Characteristics CLKIN fundamental frequency range 1 .................. ................. . 1 MHz to 105 MHz, sine or square wave Input impedance .................
Appendix A Specifications NI PXIe-6672 User Manual A-2 ni.com Jitter added to CLKIN Without PLL .................. .............. ....0.5 ps rms , 10 Hz to 100 kHz, typical With PLL ............... .............. ............0.6 ps rms , 10 Hz to 100 kHz, typical Duty cycle distortion of CLKIN to PXI_CLK10_ IN without PL L .
Appendix A Specifications © National Instruments Corporation A-3 NI PXIe-66 72 User Manual Square wave rise/fall time (10 to 90%) Low drive ............................ ............ 0.5 ns min, 2.5 ns max High drive ........................ .........
Appendix A Specifications NI PXIe-6672 User Manual A-4 ni.com Output Characteristics Frequency range ........... .............. ............DC to 105 MHz Output impedance ................. .............. ....50 Ω , nominal Output coupling ...........
Appendix A Specifications © National Instruments Corporation A-5 NI PXIe-66 72 User Manual PXI T rigger Characteristics PXI_TRIG <0..7> to PXI_TRIG <0..7> ou tput skew at NI PXIe-6672 backplan e connector ... 5 ns, typical Asynchronous delay, t pd PXI_TRIG <0.
Appendix A Specifications NI PXIe-6672 User Manual A-6 ni.com Recommended maximum cable length 1 PFI/CLKOUT, DC to 10 MHz ........ 200 m CLKOUT High Gain, 105 MHz ......80 m 2 PFI/CLKOUT Low Gain, 105 MHz ................ .............. ............30 m 3 Weight .
Appendix A Specifications © National Instruments Corporation A-7 NI PXIe-66 72 User Manual Storage Environment Ambient temperature range ........... ......... – 40 to 71 °C (Tested in accordance with IEC-60068-2-1 and IEC-60068-2-2. Meets MIL-PRF-28800F Class 3 low temperature lim it.
Appendix A Specifications NI PXIe-6672 User Manual A-8 ni.com Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for elect rical equipmen.
Appendix A Specifications © National Instruments Corporation A-9 NI PXIe-66 72 User Manual W aste Electrical and Electronic Equipment (WEEE) EU Customers At the end of their li fe cycle, all products must be sent to a WE EE recy cling center . For more information about WEEE recycling centers and Nation al Instruments WEEE initiativ es, visit ni.
© National Instruments Corporation B-1 NI PXIe-66 72 User Manual B T echnical Support and Professional Ser vices Visit the following sections of the award-winning National Instruments Web site at ni.com for technical support and professional services: • Support —T echnical support resources at ni.
Appendix B T echnica l Support and Professional Services NI PXIe-6672 User Manual B-2 ni.com • Declaration of Conformit y (DoC) —A DoC is our claim of compliance with the C ouncil of th e European Communities using the manufacturer’ s declaration of conformity .
© National Instruments Corporation G- 1 NI PXIe-6672 User Manual Glossar y Symbol Pref ix V alu e pp i c o 1 0 –1 2 nn a n o 1 0 –9 µ micro 10 –6 m milli 10 –3 k kilo 10 3 Mm e g a 1 0 6 Sym.
Glossary NI PXIe-6672 User Manual G-2 ni.com B backplane An assembly , typically a printed circuit board (PCB), with connect ors and signal paths that bus the connector pins. bus The group of conductors that interconnect individual circuitry in a computer .
Glossary © National Instruments Corporation G- 3 NI PXIe-6672 User Manual DC direct current DDS direct digital synthesis—a method of creating a clock with a prog rammable frequency . E EEPR OM electrically erasable programmabl e read-only memory—ROM that can be erased with an electrical signal and reprogrammed.
Glossary NI PXIe-6672 User Manual G-4 ni.com L LabVIEW A graphical programmi ng language. LED light-emitting diode— a semiconductor light source. M master The requesting or controlling de vice in a master/slav e conf iguration.
Glossary © National Instruments Corporation G- 5 NI PXIe-6672 User Manual P PCI peripheral component interconnect— a high-performance expansion bus architecture originally de veloped b y Intel to replace ISA and EISA.
Glossary NI PXIe-6672 User Manual G-6 ni.com S s seconds ske w The actual time difference between two e v ents that would ideally occur simultaneously . Inter-channel ske w is an example of the time dif ferences introduced by diff erent characteristics of mu ltiple channels.
© National Instruments Corporatio n I-1 NI PXIe-6672 User Manu al Index A Access LED color explanatio n (table), 3-4 overview, 3-4 Active LED color explanatio n (table), 3-4 overview, 3-4 asynchronou.
Index NI PXIe-6672 User Manual I-2 ni.com documentation conventions used in manual, vii NI resources, B-1 related documentation, viii drivers (NI resources), B-1 E electromagnetic comp atibility, A- 8.
Index © National Instruments Corporatio n I-3 NI PXIe-6672 User Manu al N National Instruments support and services, B-1 NI PXI-6653, parts lo cator diagram, 3 -3 NI PXI-665 x configuration, 2-2 conn.
Index NI PXIe-6672 User Manual I-4 ni.com PXI_Trig/PXI_Star synchronization clock possible sources, 3-14 using the PXI triggers, 3-14 R reflections, recommended cable configuration, 3-13 related docum.
Index © National Instruments Corporatio n I-5 NI PXIe-6672 User Manu al temperature-compensated oscillator. See TCXO terminating signals wi th resistors (note), 3-12 threshold, voltage, 3-12 training and certificatio n (NI resources), B-1 trigger bus.
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