PXI and PXI Express Timing and Synchronization Control NI PXI-665x, NI PXIe-6672 • Works with all PXI and PXI Express modules • Multichassis PXI synchronization • Onboard routing of internal and external clock and trigger signals • PXI slot 2 star trigger controller (PXI-665x) • PXI Express system timing slot star trigger controller (NI PXIe-6672) • Onboard high-stability references • OCXO, 50 ppb (PXI-6653) • TCXO, 1 ppm (PXI-6652 and NI PXIe-6672) • Reference clock import and export with PLL capabilities • DC to 105 MHz, high-resolution DDS clock generation • Software trigger generation • Frequency measurement capabilities Operating Systems • Windows Vista/XP • LabVIEW Real-Time Recommended Software • LabVIEW • LabWindows /CVI TM Driver Software (included) • NI-Sync >> For complete specifications, see the NI PXI-665x and the NI PXIe-6672 user manuals at ni.com/manuals. Overview and Applications CLKIN PXI_CLK10_IN AC Coupled Clock Detector OCXO (6653) TCXO (6652) PLL OCXO/TCXO Clock OCXO Calibration DAC PXI_CLK10 PXI The National Instruments PXI-665x and NI PXIe-6672 timing and synchronization control modules use the trigger bus, star trigger, and system reference clock features of PXI to implement advanced multimodule or multichassis synchronization. You can vastly improve the accuracy of measurements, implement advanced triggering schemes, or synchronize multiple modules and/or multiple chassis to act as a single system for high-channel-count applications. CLKOUT DDS DDS Clock PFI 0 Driver/ Comparator PFI 0 Threshold DAC PFI 1 3 3 6 SMB 3 3 6 SMB 3 3 6 SMB 3 3 3 3 PFI 3 3 3 3 3 PFI 4 3 3 3 3 TCXO (1 ppm) OCXO (50 ppb) TCXO (1 ppm) DC to 105 MHz DC to 105 MHz DC to 105 MHz Table 1. NI PXI-665x and NI PXIe-6672 Features PXI_TRIG<0...7> Driver/ Comparator PFI 1 Threshold DAC 3 – 2 SMB – – PXI_STAR<0...12> PFI 2 Driver/ Comparator PCI Interface PFI 2 Threshold DAC Driver/ Comparator PFI 3 Threshold DAC Driver/ Comparator PFI 4 Threshold DAC PFI 5 Driver/ Comparator PFI 5 Threshold DAC Figure 1. Block Diagram of PXI-6652 and PXI-6653 Master Modules PCI Features Front Panel Connectivity CLK10 in CLK10 out General-purpose PFI lines Programmable voltage threshold Trigger Routing Star trigger source (PXI_STAR) PXI trigger bus (PXI_TRIG) Onboard Clock Sources 10 MHz timebase DDS programmable clock NI PXI-6651 NI PXI-6652 NI PXI-6653 NI PXIe-6672 Slave Module Master Module Master Module Master Module CLOCK and TRIGGER Routing PXI and PXI Express Timing and Synchronization Control Star Trigger Bus Module Local Bus Module Module Star Trigger Controller System Controller 10 MHz Clock 132 MB/s, 33 MHz, 32-Bit PCI Bus PXI Trigger Bus Figure 4. Diagram of Synchronization Features in the PXI Backplane • Star trigger (PXI_STAR) – 13 or 17 equal-trace-length, point-to-point lines for providing low-skew (<1 ns) trigger or clock signals from slot 2 to slots 3 through 15 in a PXI chassis or the system timing slot to slots 2 through 17 in a PXI Express chassis. • Trigger bus (PXI_TRIG) – Eight bused TTL lines for general-purpose routing of triggers, clocks, and handshaking signals. • 10 MHz clock (PXI_CLK10) – For improved accuracy, capable devices, such as the NI PXI-5xxx modular instruments, can phase-lock to this high-accuracy low-jitter 10 MHz reference clock. Figure 2. Block Diagram of NI PXIe-6672 Master Module PXI Backplane Overview PXI-665x and NI PXIe-6672 modules provide full control of the following timing and synchronization features of the PXI and the PXI Express backplane, respectively. To act as a PXI star trigger controller or to provide a high-accuracy 10 MHz reference clock, a PXI-665x module must be installed in slot 2 of the PXI chassis, as shown in Figure 4, and the NI PXIe-6672 must be installed in the system timing slot of the PXI Express chassis. CLKIN PXI_CLK10_IN AC Coupled Clock Detector PXI High-Stability 10 MHz Timebase PXI_STAR <0...12> PFI 0 Driver/ Comparator PFI 0 Threshold DAC PFI 1 CLOCK and TRIGGER Routing PXI_TRIG<0...7> Driver/ Comparator PFI 1 Threshold DAC When installed in slot 2 of a PXI chassis, the PXI-6652 and PXI-6653 modules can override the built-in 10 MHz reference clock on a PXI chassis, and when installed in the system timing slot of a PXI Express chassis, the NI PXIe-6672 can override the built-in 10 MHz reference clock on a PXI Express chassis. Typically, most chassis provide a 10 MHz reference clock with 25 ppm accuracy (10 MHz ±250 Hz). This accuracy is improved to 1 ppm with the PXI-6652 and NI PXIe-6672, and to 50 ppb with the PXI-6653. Many modules, such as the PXI-5xxx modular instruments, have phase-locked-loop (PLL) circuitry to synchronize with the 10 MHz reference clock. PCI PCI Interface Figure 3. Block Diagram of PXI-6651 Slave Module BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.) 2 PXI and PXI Express Timing and Synchronization Control High-Resolution DDS Clock Multichassis Synchronization The onboard direct digital synthesis (DDS) clock of the PXI-6652, PXI-6653, and NI PXIe-6672 modules provides an extremely highresolution programmable clock source that can generate clocks from DC to 105 MHz in frequency with <1.1 µHz (PXI-6653 and PXI-6652) or <0.075 Hz (NI PXIe-6672) resolution. Use this clock as a common timebase for data acquisition modules. Using a combination of master PXI-6652 and PXI-6653 modules with slave PXI-6651 modules, you can tightly synchronize multiple PXI chassis, and using a combination of NI PXIe-6672 modules, you can tightly synchronize multiple PXI Express chassis. With these modules, you can create very high-channel-count synchronized systems for data acquisition, control, and instrumentation. NI-Sync Software The included NI-Sync driver software provides powerful and easy-touse control of PXI-665x and NI PXIe-6672 modules. You can use NI application development environment (ADE) software such as LabVIEW or LabWindows/CVI, or other ADEs such as Visual C/C++ for programming these modules. For example programs specific to NI-Sync, please visit ni.com/examples. Figure 5. The NI-Sync driver software provides an easy-to-use interface to PXI-665x and NI PXIe-6672 modules. Ordering Information NI PXI-6653 (Master, OCXO)..................................................778715-01 NI PXI-6652 (Master, TCXO) ..................................................778726-01 NI PXI-6651 (Slave)................................................................778725-01 NI PXIe-6672 (Master, TCXO) ................................................780063-01 Cables SMB-210................................................................................188858-01 Dual SMB Plug to Dual SMB Plug Coax, 50 Ω, 1 m Figure 6. In this example, three PXI chassis containing 13 PXI-4472 eight-channel 102.4 kS/s simultaneous-sampling dynamic signal acquisition modules are synchronized. The result is a 312-channel synchronized acquisition system. >> For complete specifications, see the NI PXI-665x and the NI PXIe-6672 user manuals at ni.com/manuals. SMB-200................................................................................188859-01 SMB Plug to SMB Plug Coax, 50 Ω, 1 m BUY NOW! For complete product specifications, pricing, and accessory information, call 800 813 3693 (U.S.) or go to ni.com/pxi. BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.) 3 NI Services and Support NI has the services and support to meet your needs around the globe and through the application life cycle – from planning and development through deployment and ongoing maintenance. We offer services and service levels to meet customer requirements in research, design, validation, and manufacturing. Visit ni.com/services. Training and Certification NI training is the fastest, most certain route to productivity with our products. NI training can shorten your learning curve, save development time, and reduce maintenance costs over the application life cycle. We schedule instructor-led courses in cities worldwide, or we can hold a course at your facility. We also offer a professional certification program that identifies individuals who have high levels of skill and knowledge on using NI products. Visit ni.com/training. Professional Services Our NI Professional Services team is composed of NI applications and systems engineers and a worldwide National Instruments Alliance Partner program of more than 600 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance. OEM Support We offer design-in consulting and product integration assistance if you want to use our products for OEM applications. For information about special pricing and services for OEM customers, visit ni.com/oem. ni.com • 800 813 3693 National Instruments • [email protected] Local Sales and Technical Support In offices worldwide, our staff is local to the country, giving you access to engineers who speak your language. NI delivers industry-leading technical support through online knowledge bases, our applications engineers, and access to 14,000 measurement and automation professionals within NI Developer Exchange forums. Find immediate answers to your questions at ni.com/support. We also offer service programs that provide automatic upgrades to your application development environment and higher levels of technical support. Visit ni.com/ssp. Hardware Services NI Factory Installation Services NI Factory Installation Services (FIS) is the fastest and easiest way to use your PXI or PXI/SCXI combination systems right out of the box. Trained NI technicians install the software and hardware and configure the system to your specifications. NI extends the standard warranty by one year on hardware components (controllers, chassis, modules) purchased with FIS. To use FIS, simply configure your system online with ni.com/pxiadvisor. Calibration Services NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. We provide manual calibration procedures, services to recalibrate your products, and automated calibration software specifically designed for use by metrology laboratories. Visit ni.com/calibration. Repair and Extended Warranty NI provides complete repair services for our products. Express repair and advance replacement services are also available. We offer extended warranties to help you meet project life-cycle requirements. Visit ni.com/services. *351517A-01* 351517A-01 2007-8957-501-101-D © 2007 National Instruments Corporation. All rights reserved. CVI, LabVIEW, National Instruments, National Instruments Alliance Partner, NI, ni.com, and SCXI are trademarks of National Instruments. The mark LabWindows is used under a license from Microsoft Corporation. Other product and company names listed are trademarks or trade names of their respective companies. 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