NI PXI-6653 User Manual
Contents
1. AN 1 Access LED 4 CLKIN Connector 2 Active LED 5 PFI lt 0 5 gt Connectors 3 CLKOUT Connector Figure 3 2 NI PXI 6653 Front Panel National Instruments Corporation 3 3 NI PXI 6653 User Manual Chapter 3 Hardware Overview Access LED The Access LED indicates the communication status of the NI PXI 6653 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 error or phase locked loop PLL activity You can change the Active LED to amber unless an error overrides the selection Refer to Figure 3 2 for the location of the Active LED Tip Changing the Active LED color to amber is helpful when you want to identify devices in a multichassis situation or when you want an indication that your application has reached a predetermined section of the code Table 3 2 illustrates the meaning of each Active LED color Table 3 2 Active LED Color Quick Reference Table PXI_CLK10 User PLL Color Stopped PLL Error Setting Active Red Yes Yes Amber No No Yes Green No No No Yes Off No No No No 3 Note A red Activ2. LabVIEW LabWindows CVI Microsoft Visual C MSVC PXI chassis PXI embedded controller or a desktop computer connected to the PXI chassis using MXI 3 hardware If you are using the NI PXI 6653 in a system to synchronize NI PXI 4472 NI PXI 5112 NI PXI 5411 NI PXI 6115 or E Series DAQ modules you can refer to the NI Sync User Manual which you can find on the NI Sync Driver and Examples CD or download from ni com manuals National Instruments Corporation 1 1 NI PXI 6653 User Manual Chapter 1 Introduction Unpacking The NI PXI 6653 is shipped in an antistatic package to prevent electrostatic damage to the module Electrostatic discharge ESD can damage several components on the module UN Caution Never touch the exposed pins of connectors To avoid such damage in handling the module take the following precautions e Ground yourself using a grounding strap or by touching a grounded object e Touch the antistatic package to a metal part of the computer chassis before removing the module from the package Remove the module from the package and inspect the module for loose components or any sign of damage Notify NI if the module appears damaged in any way Do not install a damaged module into the computer Store the NI PXI 6653 in the antistatic envelope when not in use Software Programming Choices When programming the NI PXI 6653 you can use NI application development environment
3. Low Voltage Directive safety 73 23 EEC Electromagnetic Compatibility Directive EMC reirei 89 336 EEC 3 Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com hardref nsf search by model number or product line and click the appropriate link in the Certification column National Instruments Corporation A 7 NI PXI 6653 User Manual Technical Support and Professional Services Visit the following sections of the National Instruments Web site at ni com for technical support and professional services National Instruments Corporation Support Online technical support resources include the following Self Help Resources For immediate answers and solutions visit our extensive library of technical support resources available in English Japanese and Spanish at ni com support These resources are available for most products at no cost to registered users and include software drivers and updates a KnowledgeBase product manuals step by step troubleshooting wizards conformity documentation example code tutorials and application notes instrument drivers discussion forums a measurement glossary and so on Assisted Support Options Contact NI engineers and other measurement and automation professionals by visiting ni com support Our online system helps you define your questio
4. a Eurocard configuration of the PCI bus for industrial applications digital to analog digital to analog converter an electronic device that converts a digital number into a corresponding analog voltage or current data acquisition 1 collecting and measuring electrical signals from sensors transducers and test probes or fixtures and inputting them to a computer for processing 2 collecting and measuring the same kinds of electrical signals with A D and or DIO devices plugged into a computer and possibly generating control signals with D A and or DIO devices in the same computer G 2 ni com DC DDS E EEPROM ESD F frequency frequency tuning word front panel H in jitter National Instruments Corporation G 3 Glossary direct current Direct Digital Synthesis a method of creating a clock with a programmable frequency electrically erasable programmable read only memory ROM that can be erased with an electrical signal and reprogrammed electrostatic discharge the basic unit of rate measured in events or oscillations per second using a frequency counter or spectrum analyzer Frequency is the reciprocal of the period of a signal a number that specifies the frequency the physical front panel of an instrument or other hardware hertz the number of scans read or updates written per second inch or inches the rapid variation of a clock or sampling frequency from an ideal constant
5. ADE software such as LabVIEW or LabWindows CVI or you can use other ADEs such as Visual C C LabVIEW features interactive graphics a state of the art interface and a powerful graphical programming language The LabVIEW Data Acquisition VI Library a series of virtual instruments for using Lab VIEW 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 NI PXI 6653 User Manual 1 2 ni com 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 product except as described in this document Use the product only with the chassis modules accessories and cables specified in the installation instructions You must have all covers and filler panels installed during operation of the product Do not operate the product in an explosive atmosphere or where there may be flammable gases or fumes If you must operate the product in
6. avoid injury data loss or a system crash When this symbol is marked on the product refer to the Safety Information section of Chapter 1 Introduction for precautions to take Bold text denotes items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names and hardware labels Italic text denotes variables emphasis a cross reference or an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply National Instruments Corporation vii NI PXI 6653 User Manual About This Manual monospace NI PXI 6653 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 and code excerpts This phrase refers to the NI PXI 6653 module for the PXI bus National Instruments Documentation The NI PXI 6653 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 Use the documentation you have as follows e Measurement hardware documentation This documentation contains detailed information about the measurement hardware that
7. backplane The feedback in the PLL comes from PXI_CLK10 This PLL makes it possible for the NI PXI 6653 to align clock edges at CLKIN with the edges of PXI_CLK10 that the modules receive If you split an external accurate 10 MHz reference and route it to two chassis they can both lock to it The result is a tighter synchronization of PXI_CLK10 on the chassis 3 18 ni com Calibration This chapter discusses the calibration of the NI PXI 6653 Calibration consists of verifying the measurement accuracy of a device and correcting for any measurement error The NI PXI 6653 is factory calibrated before shipment at approximately 25 C to the levels indicated in Appendix A Specifications The associated calibration constants the corrections that were needed to meet specifications are stored in the onboard nonvolatile memory EEPROM The driver software uses these stored values Factory Calibration OCXO Frequency PXI CLK10 Phase The factory calibration of the NI PXI 6653 involves calculating and storing four calibration constants These values control the accuracy of four features of the device which are discussed in the following sections The OCXO frequency can be varied over a small range The output frequency of the OCXO is adjusted using this constant to meet the specification listed in Appendix A Specifications When using the PLL to lock PXI_CLK10 to an external reference clock the phase between the clocks can b
8. bus skew slave slot Slot 2 National Instruments Corporation G 5 Glossary phase locked loop the measure of the stability of an instrument and its capability to give the same measurement over and over again for the same input signal 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 a special set of trigger lines in the PXI backplane for high accuracy device synchronization with minimal latencies on each PXI slot the clock signal that is used to synchronize the RTSI PXI triggers or PXI STAR triggers on an NI PXI 6653 Real Time System Integration bus the NI timing bus that connects DAQ devices directly by means of connectors on top of the devices for precise synchronization of functions seconds 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 a computer or peripheral device controlled by another computer the place in the computer or chassis in which a card or module can be install
9. can also be routed out to the CLKOUT connector In addition to replacing the native backplane clock directly the OCXO can phase lock to an external frequency source This operation is discussed in detail in the Using the PXI_CLK10 PLL section 3 8 ni com Chapter 3 Hardware Overview Routing Signals The NI PXI 6653 has versatile trigger routing capabilities It can route signals to and from the front panel the PXI star triggers and the PXI RTSI triggers The NI PXI 6653 also can route a 10 MHz clock from CLKIN to the PXI 10 MHz reference clock or it can lock the OCXO to an external reference clock and send that to the PXI 10 MHz reference clock The NI PXI 6653 can route either the OCXO or the PXI 10 MHz reference clock to CLKOUT Figures 3 3 and 3 4 summarize the routing features of the NI PXI 6653 The remainder of this chapter details the capabilities and constraints of the routing architecture Selection PXI_STAR lt 0 12 gt Selection PFI OH Circuitry pa PXI_TRIG lt 0 7 gt 28 gt Circuitry PXI_STAR 0 Selecti SUE M are SOURCE Selecti election election PFI 1 Circuitry p routed to SOURCE Circuitry PXI_STAR 1 of each Selection e Circuitry block e e e e e e e e e e e e e e e Selection E M gt Selection PFI5 Circuitry 4 5 gt Circuitry PXI STAR 12 SYNCHRONIZATION CLOCKS for PFI 0 5 M Selection gt Circuitry PXI_TRIG
10. failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation Trademarks CVI IMAQ IVI LabVIEW MXI National Instruments NI ni com NI DAQ NI VISA and RTSI are trademarks of National Instruments Corporation Product and company names mentioned herein are trademarks or trade names of their respective companies Patents For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 1 NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN 2 IN ANY A
11. frequency NI PXI 6653 User Manual Glossary L LabVIEW LED master Measurement amp Automation Explorer MAX NI DAQ 0 OCXO oscillator output impedance PCI PFI NI PXI 6653 User Manual a graphical programming language Light Emitting Diode a semiconductor light source the requesting or controlling device in a master slave configuration a controlled centralized configuration environment that allows you to configure all of your National Instruments DAQ GPIB IMAQ IVI Motion VISA and VXI devices National Instruments driver software for DAQ hardware oven controlled crystal oscillator a device that generates a fixed frequency signal An oscillator most often generates signals by using oscillating crystals but may also use tuned networks lasers or atomic clock sources The most important specifications on oscillators are frequency accuracy frequency stability and phase noise the measured resistance and capacitance between the output terminals of a circuit Peripheral Component Interconnect a high performance expansion bus architecture originally developed by Intel to replace ISA and EISA It is achieving widespread acceptance as a standard for PCs and work stations it offers a theoretical maximum transfer rate of 132 Mbytes s Programmable Function Interface G 4 ni com PLL precision propagation delay PXI PXI star PXI Trig PXI Star synchronization clock R RTSI
12. pin on the backplane that will replace PXI_CLK10 There is a delay through the module as well as a distribution delay on the backplane These delays tend to be similar for chassis of the same model so routing the same clock to a pair of chassis usually matches PXI CLK10 to within a few nanoseconds The third option is to employ the NI PXI 6653 PLL circuitry for the OCXO As in option 1 the output of the OCXO replaces the native 10 MHz signal However this scheme also requires an input signal on CLKIN This signal must be a stable clock and its frequency must be a multiple of 1 MHz 5 MHz or 13 MEZ for example The PLL feedback circuit generates a voltage proportional to the phase difference between the reference input on PXI_CLK10 and the output of the OCXO itself This PLL voltage output then tunes the output frequency of the OCXO As long as the incoming signal is a stable 1 MHz frequency multiple the PLL circuit quickly locks the OCXO to the reference eliminating all phase drift between the two signals Using the PLL provides several advantages over the other two options for replacing the PXI backplane clock CLKIN is not required to be 10 MHz If you have a stable reference that is a multiple of 1 MHz such as 13 or 5 MHz you can frequency lock the chassis to it If CLKIN stops or becomes disconnected PXI_CLK10 is still present in the chassis If CLKIN is 10 MHz the NI PXI 6653 can compensate for distribution delays in the
13. such an environment it must be in a suitably rated enclosure If you need to clean the product use a soft nonmetallic brush The product must be completely dry and free from contaminants before you return it to service Operate the product only at or below Pollution Degree 2 Pollution is foreign matter in a solid liquid or gaseous state that can reduce dielectric strength or surface resistivity The following is a description of pollution degrees e Pollution Degree 1 means no pollution or only dry nonconductive pollution occurs The pollution has no influence e Pollution Degree 2 means that only nonconductive pollution occurs in most cases Occasionally however a temporary conductivity caused by condensation must be expected e Pollution Degree 3 means that conductive pollution occurs or dry nonconductive pollution occurs that becomes conductive due to condensation You must insulate signal connections for the maximum voltage for which the product is rated Do not exceed the maximum ratings for the product Do not install wiring while the product is live with electrical signals Do not remove or add connector blocks when power is connected to the system Avoid contact between your body and the connector block signal when hot swapping modules Remove power from signal lines before connecting them to or disconnecting them from the product National Instruments Corporation 1 3 NI PXI 6653 User Manual Chapter 1 Introdu
14. 0 PFI O Sa Selection gt Circuitry PXI_TRIG 1 DDS e e e e e e N e e e PXI CLK10 9M Lohe Selection PXI TRIG 7 Circuitry PFIO SYNCHRONIZATION CLOCKS for DDS gt PXI_STAR lt 0 12 gt and d PXI_TRIG lt 0 7 gt gt 2N PXI_CLK10 s 2M National Instruments Corporation Figure 3 3 High Level Schematic of NI PXI 6653 Signal Routing Architecture 3 9 NI PXI 6653 User Manual Chapter 3 Hardware Overview Figure 3 4 provides a more detailed view of the Selection Circuitry referenced in Figure 3 3 PFI 0 5 a ul PXI_TRIG lt 0 7 gt O 5 PXI_STAR lt 0 12 gt gt el 2 Software Trigger gt e GND z E z CLK N u J c SE CLK N 9 fo gt e e 5 o Es CLK M 7 gt Figure 3 4 Signal Selection Circuitry Diagram Determining Sources and Destinations All signal routing operations can be characterized by a source input and a destination In addition synchronous routing operations must also define a third signal known as the synchronization clock Refer to the Choosing the Type of Routing section for more information on synchronous versus asynchronous routing Table 3 4 summarizes the sources and destinations of the NI PX1 6653 The destinations are listed in the horizontal heading row and the sources are listed in the column at the far left A v in a cell indicates th
15. EL eet ere 2 5 PSims Duty cycle distortion of CLKIN without PLL eee 1 Duty cycle of PLL 45 to 55 CLKIN fundamental frequency can be any multiple of 1 MHz within the range specified when the PLL is engaged and PXI_CLK10 is locking to it The frequency must be 10 MHz when replacing PXI_CLK10 without the PLL 2 Stresses beyond those listed can cause permanent damage to the device Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability Functional operation of the device outside the conditions indicated in the operational parts of the specification is not implied National Instruments Corporation A 1 NI PXI 6653 User Manual Appendix A Specifications CLKOUT Characteristics Output frequency From PXI CLKI1O 10 MHz From QCXO ce eie 10 MHz From DDS nee 1 MHz to 80 MHz Duty cycle ioeheete v tee bee 40 to 6096 Output impedance sess 50 Q 5 Output coupling seeeeee AC Amplitude software configurable to two voltage levels low and high drive Open Load Square Wave Low Drive 4 1 5 4 Vp p High Drive 7 1 9 2 Vp p 50 Q Load Square Wave Low Drive 2 0 2 7 Vp p High Drive 3 5 4 6 V p p Square wave rise fall time 10 to 90 LOowdrVe iie e aeree 4 ns min 6 ns max High drives uoo 4 5 ns min 7 ns max Maximum reco
16. I 6653 performs synchronous routing operations Generating a Single Pulse Global Software Trigger The global software trigger is a single pulse with programmable delay that is fired on a software command This signal is always routed synchronously with a clock Therefore asynchronous routing is not supported when the signal source is the global software trigger The software trigger can be delayed by up to 15 clock cycles on a per route basis This feature is useful if a single pulse must be sent to several destinations with significantly different propagation delays By delaying the pulse on the routes with shorter paths you can compensate for the propagation delay An example of such a situation would be when a trigger pulse must arrive nearly simultaneously at the local backplane and the backplane of another chassis separated by 50 m of coaxial cable National Instruments Corporation 3 17 NI PXI 6653 User Manual Chapter 3 Hardware Overview Using the PXI CLK10 PLL NI PXI 6653 User Manual A module in Slot 2 of a PXI chassis can replace the PXI_CLK10 reference clock The NI PXI 6653 offers three options for this replacement This section describes each option The first option is to replace PXI_CLK10 directly with the OCXO output This oscillator is a more stable and accurate reference than the native backplane clock The second option is to route a 10 MHz clock directly from the front panel to PXI_CLK10_IN which is the
17. I RTSI triggers from PFI lt 0 5 gt from the PXI star triggers or from other PXI RTSI triggers You also can route PXI_CLK10 or the DDS clock to a PXI RTSI trigger line PXI_TRIG lt 0 7 gt using the synchronization clock You can independently select the output signal source for each PXI RTSI trigger line from one of the following sources e PHI 0 5 e Another PXI RTSI trigger lt 0 7 gt PXI TRIG lt 0 7 gt e PXI STAR lt 0 12 gt e Global software trigger e PXI Trig PXI Star synchronization clock The PXI Trig PXI Star synchronization clock may be any of the following signals e DDS clock e PXI_CLK10 e PFI0 Input e Any of the above signals divided by the first frequency divider 2 up to 512 Any of the above signals divided by the second frequency divider 2 up to 512 Refer to the Choosing the Type of Routing section for more information about the synchronization clock National Instruments Corporation 3 13 NI PXI 6653 User Manual Chapter 3 Hardware Overview B Note The PXI Trig PXI Star synchronization clock is the same for all routing operations in which PXI RTSI lt 0 5 gt 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 Using the PXI Star Triggers There are up to 13 PXI star triggers per chassis Each trigger line is a dedicated connection between Slot 2 and one other slot The P
18. PPLICATION INCLUDING THE ABOVE RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY COMPUTER HARDWARE MALFUNCTIONS COMPUTER OPERATING SYSTEM SOFTWARE FITNESS FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION INSTALLATION ERRORS SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES TRANSIENT FAILURES OF ELECTRONIC SYSTEMS HARDWARE AND OR SOFTWARE UNANTICIPATED USES OR MISUSES OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER ADVERSE FACTORS SUCH AS THESE ARE HEREAFTER COLLECTIVELY TERMED SYSTEM FAILURES ANY APPLICATION WHERE A SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS INCLUDING THE RISK OF BODILY INJURY AND DEATH SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE TO AVOID DAMAGE INJURY OR DEATH THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM FAILURES INCLUDING BUT NOT LIMITED TO BACK UP OR SHUT DOWN MECHANISMS BECAUSE EACH END USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS TESTING PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL INSTRUMENTS THE USER OR APPLICATION DESIGNER IS
19. PXI NI PXI 6653 User Manual Timing and Synchronization Module for PXI Wy NATIONAL November 2003 Edition P INSTRUMENTS Part Number 370968A 01 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 0 662 45 79 90 0 Belgium 32 0 2 757 00 20 Brazil 55 11 3262 3599 Canada Calgary 403 274 9391 Canada Ottawa 613 233 5949 Canada Qu bec 450 510 3055 Canada Toronto 905 785 0085 Canada Vancouver 514 685 7530 China 86 21 6555 7838 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 385 0 9 725 725 11 France 33 0 1 48 14 24 24 Germany 49 0 89 741 31 30 Greece 30 2 10 42 96 427 India 91 80 51190000 Israel 972 0 3 6393737 Italy 39 02 413091 Japan 81 3 5472 2970 Korea 82 02 3451 3400 Malaysia 603 9131 0918 Mexico 001 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 095 783 68 51 Singapore 65 6226 5886 Slovenia 386 3 425 4200 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 200 51 51 Taiwan 886 2 2528 7227 Thailand 662 992 7519 United Kingdom 44 0 1635 523545 For further support information refer to the Technical Support and Professional Services appendix To comment on the docu
20. PXI 6653 User Manual 2 2 ni com Hardware Overview This chapter presents an overview of the hardware functions of the NI PXI 6653 Figure 3 1 provides a functional overview of the NI PXI 6653 hardware National Instruments Corporation 3 1 NI PXI 6653 User Manual Chapter 3 Hardware Overview p Diver PFI 2 gt Comparator PFI 3 Comparator Driver Driver Driver PFI 4 EE Comparator Driver PFI5 a Comparator PCI Interface AC Coupled P PXI_CLK10_IN CEKIN Clock Detector PLL gt OCXO OCXO Calibration OCXO DAC PXI_CLK10 Clock e CLKOUT DDS DDS Clock gt Driver PFI O W Comparator a Biens PXI_STAR lt 0 12 gt i m PFI elcome 5 pesce PXI_TRIG lt 0 7 gt PFI 0 1 Threshold L DAC PXI PCI PFI 2 5 Threshold DAC Figure 3 1 Functional Overview of the NI PXI 6653 NI PXI 6653 User Manual 3 2 ni com Chapter 3 Hardware Overview NI PXI 6653 Front Panel Figure 3 2 shows the connectors and LEDs on the front panel of the NI PXI 6653 Yy NATIONAL INSTRUMENTS NI PXI 6653 Timing Module CLK OUT CLK IN PFIO PFI 1 PFI2 PFI3 PFI4 PFI5
21. PXI 6653 User Manual B 2 ni com Glossary Symbol Prefix Value p pico 10 2 n nano 10 9 u micro 10 6 m milli 10 3 k kilo 103 M mega 106 Symbols percent plus or minus positive of or plus negative of or minus per T degree Q ohm A accumulator ADE asynchronous a part where numbers are totaled or stored application development environment a property of an event that occurs at an arbitrary time without synchronization to a reference clock National Instruments Corporation G 1 NI PXI 6653 User Manual Glossary backplane CLKIN CLKOUT clock CompactPCI D D A DAC DAQ NI PXI 6653 User Manual an assembly typically a printed circuit board PCB with 96 pin connectors and signal paths that bus the connector pins PXI systems have two connectors called the J1 and J2 connectors 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 An example of a PC bus is the PCI bus Celsius CLKIN is a signal connected to the SMB input pin of the same name CLKIN can serve as PXI CLK10 IN or be used as a phase lock reference for the OCXO CLKOUT is the signal on the SMB output pin of the same name Either the OCXO clock or PXI CLK10 may be routed to CLKOUT hardware component that controls timing for reading from or writing to groups
22. ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION INCLUDING WITHOUT LIMITATION THE APPROPRIATE DESIGN PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION Compliance Compliance with FCC Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission FCC has rules to protect wireless communications from interference The FCC places digital electronics into two classes These classes are known as Class A for use in industrial commercial locations only or Class B for use in residential or commercial locations All National Instruments NI products are FCC Class A products Depending on where it is operated this Class A product could be subject to restrictions in the FCC rules In Canada the Department of Communications DOC of Industry Canada regulates wireless interference in much the same way Digital electronics emit weak signals during normal operation that can affect radio television or other wireless products All Class A products display a simple warning statement of one paragraph in length regarding interference and undesired operation The FCC rules have restrictions regarding the locations where FCC Class A products can be operated Consult the FCC Web site at www fcc gov for more information FCC DOC Warnings This equipment gener
23. XI Specification Revision 2 1 requires that the propagation delay along each star trigger lines be matched to within 1 ns A typical upper limit for the skew in most PXI chassis is 500 ps The low skew of the PXI star trigger bus is useful for applications that require triggers to arrive at several modules nearly simultaneously The star trigger lines are bidirectional so signals can be sent to Slot 2 from a module in another slot or from Slot 2 to the other module You can independently select the output signal source for each PXI star trigger line from one of the following sources e PFI 0 5 e PXI RTSI triggers lt 0 7 gt PXI_TRIG lt 0 7 gt e Another PXI star trigger line PXI STAR lt 0 12 gt e Global software trigger e PXI Trig PXI Star synchronization clock Refer to the Using the PXI RTSI Triggers section for more information on the PXI_Trig PXI_Star synchronization clock Choosing the Type of Routing NI PXI 6653 User Manual The NI PXI 6653 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 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 When the source signal
24. at the source and destination combination defined by that cell is a valid routing combination NI PXI 6653 User Manual 3 10 ni com Table 3 4 Sources and Destinations for NI PXI 6653 Signal Routing Operations Chapter 3 Hardware Overview Destinations Front Panel Backplane Onboard CLKOUT PFI lt 0 5 gt PXI_ PXI Star RTSI PXI OCXO E CLK10_IN Trigger TRIG Reference S lt 0 12 gt lt 0 7 gt PLL CLKIN 4 4 E PFI lt 0 5 gt V V V PXI V 4 V V V CLK10 wu 2 2 5 PXLSTAR v V y A E lt 0 12 gt o i f RTSUPXI V V V TRIG lt 0 7 gt OCXO V 4 E DDS J A V J e E Global 4 V 4 Software Trigger Using Front Panel PFls As Inputs The front panel PFIs can receive external signals from 0 to 5 V They can be terminated programmatically with 50 Q resistances to match the cable impedance and minimize reflections Note Terminating the signals with a 50 resistance is recommended when the source is another NI PXI 6653 or any other source with a 50 Q output 3 The voltage thresholds for the front panel PFI inputs are programmable The input signal is generated by comparing the input voltage on the PFI connectors to the voltage output of software programmable DACs The threshold for PFI lt 0 1 gt can be set to one value and the threshold for PFI lt 2 5 gt can be set to a second value This capability is useful if you are importing signals from
25. ates and uses radio frequency energy and if not installed and used in strict accordance with the instructions in this manual and the CE marking Declaration of Conformity may cause interference to radio and television reception Classification requirements are the same for the Federal Communications Commission FCC and the Canadian Department of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user is required to correct the interference at their own expense Canadian Department of Communications This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe A respecte toutes les exigences du R glement sur le mat riel brouilleur du Ca
26. cks to PXI_CLK10 PXI STAR lt 0 12 gt In Out The PXI star trigger bus connects Slot 2 to Slot 3 15 in a star configuration The electrical paths of each star line are closely matched to minimize intermodule skew An NI PXI 6653 in Slot 2 can route signals to Slots lt 3 15 gt using the star trigger bus NI PXI 6653 User Manual 3 6 ni com Chapter 3 Hardware Overview Table 3 3 Signal Descriptions Continued Signal Name Direction Description PFI 0 5 In Out The Programmable Function Interface pins on the NI PXI 6653 route timing and triggering signals between multiple PXI chassis A wide variety of input and output signals can be routed to or from the PFI lines PXI TRIG lt 0 7 gt In Out The PXI trigger bus consists of eight digital lines shared among all slots in the PXI chassis The NI PXI 6653 can route a wide variety of signals to and from these lines Note PXI TRIG lt 0 5 gt are also known as RTSI 0 5 in some hardware devices and APIs However PXI TRIG 6 7 are not identical to RTSI lt 6 7 gt The remainder of this chapter describes how these signals are used acquired and generated by the NI PXI 6653 hardware and explains how you can route the signals between various locations to synchronize multiple measurement devices and PXI chassis Clock Generation The NI PXI 6653 can generate two types of clock signals The first clock is generate
27. ction Operate the product at or below the installation category marked on the 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 I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Installation Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as that provided by a standard wall outlet for example 115 V for U S or 230 V for Europe Examples of Installation Category II are measurements performed on household appliances portable tools and similar products Installation Category III is for measurements performed in the building installation at the distribution level This category refers to measurements on hard wired equipment such as equi
28. ctor 3 5 using the PXI_CLK10 PLL 3 18 power requirement specifications A 6 programmable function interface See PFI programming examples NI resources B 1 PXI backplane clock 3 8 PXI star trigger bus See PXI STAR lt 0 12 gt National Instruments Corporation F3 Index PXI star triggers front panel triggers as outputs 3 12 PXI trigger bus See PXI TRIG lt 0 7 gt PXI_CLK10 Active LED 3 4 clock generation 3 8 DDS phase lock 3 6 front panel triggers as outputs 3 12 routing to the CLKOUT connector 3 5 using front panel PFIs as outputs 3 12 using the PXI RTSI triggers 3 13 using the PXI_CLK10 PLL 3 18 PXI_CLK10_IN routing from the CLKIN connector 3 5 signal description table 3 6 PXI_CLK10_OUT signal description table 3 6 PXI STAR lt 0 12 gt asynchronous routing 3 15 signal description table 3 6 specifications A 4 using front panel PFIs as outputs 3 12 using the PXI star triggers 3 14 using the PXI RTSI triggers 3 13 PXI TRIG lt 0 7 gt asynchronous routing 3 15 signal description table 3 7 specifications A 4 using front panel PFIs as outputs 3 12 using the PXI star triggers 3 14 using the PXI RTSI triggers 3 13 PXI Trig PXI Star synchronization clock possible sources 3 13 using the PXI RTSI triggers 3 13 R reflections recommended cable configuration 3 12 related documentation viii resistors terminating signals note 3 11 NI PXI 6653 User Manual Index routin
29. d using the onboard DDS chip and the second is generated with a precise 10 MHz oscillator The following sections describe the two types of clock generation and explain the considerations for choosing either type Direct Digital Synthesis DDS DDS is a method of generating a clock with programmable frequency DDS consists of a frequency tuning word an accumulator a sine lookup table a D A converter DAC and a comparator The frequency tuning word is a number that specifies the desired frequency Each master clock cycle the frequency tuning word is added to the accumulator which rolls over when it gets to its maximum value The accumulator value is used to get a point in the sine lookup table which is converted to an analog voltage by the DAC For example if the sine table is 128 points long and the frequency tuning word is one the accumulator takes 128 clock cycles to output one sine wave If you change the frequency National Instruments Corporation 3 7 NI PXI 6653 User Manual Chapter 3 Hardware Overview tuning word to 3 the accumulator steps through the sine table three times as fast and outputs a sine wave in 128 3 or 42 6 clock cycles The output of the DAC is run through an analog filter to smooth the sine wave The filtered output is then run through a comparator which changes the output to a square wave with the specified frequency You can specify the programmable DDS frequency on the NI PXI 6653 with a precis
30. e LED can indicate that either PXI_CLK10 has stopped or that there is a PLL error NI PXI 6653 User Manual 3 4 ni com Chapter 3 Hardware Overview Connectors This section describes the connectors on the front panel of the NI PXI 6653 e 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 e CLKOUT Clock Output This connector is used to source a clock that can programmatically be routed from the oven controlled crystal oscillator OCXO Direct Digital Synthesis DDS or backplane clock PXI_CLK10 e PFI 0 52 Programmable Function Interface lt 0 5 gt These connectors can be used for either input or output Additionally PFI 0 can be used as a clock input for internally synchronizing other signals Refer to the Synchronous Routing section for more information about this functionality You can program the behavior of these PFI connections individually Refer to Figure 3 2 for a diagram showing the locations of these connections on the NI PXI 6653 front panel UN Caution Connections that exceed any of the maximum ratings of input or output signals on the NI PXI 6653 can damage the module and the computer NI is not liable for any damage resulting from such signal connections Hardware Features The NI PXI 6653
31. e adjusted The time between rising edges of PXI CLK10 and the input clock is minimized using this constant DDS Start Trigger Phase 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 4 1 NI PXI 6653 User Manual 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 PXI 6653 modules are aligned Additional Information Refer to ni com calibration for additional information on NI calibration services NI PXI 6653 User Manual 4 2 ni com Specifications All specifications are typical at 25 C unless otherwise noted CLKIN Characteristics CLKIN fundamental frequency range arnensondussimeiss 1 MHz to 100 MHz sine or square wave Input impedance sess 50 Q 5 Input coupling eee AC Voltage range ssssseeee 400 mV to 5 V Absolute maximum input voltage 6 Vp p max CLKIN to PXI_CLK10_IN delay Uncompensated 11 ns to 11 7 ns PLL compensated X ns max CLKIN frequency accuracy for PLL and OCXO s 1 5 ppm Jitter added to CLKIN Without PLL esee 15 PSims With P
32. ed the second slot in a PXI system which can house a master timing unit NI PXI 6653 User Manual Glossary SMB synchronous T tctoQ thoid tpa TRIG trigger tsetup V VI NI PXI 6653 User Manual Sub Miniature Type B a small coaxial signal connector that features a snap coupling for fast connection a property of an event that is synchronized to a reference clock clock to output time hold time propagation delay time trigger signal a digital signal that starts or times a hardware event for example starting a data acquisition operation setup time volts virtual instrument G 6 ni com Index A Access LED color explanation table 3 4 overview 3 4 Active LED color explanation table 3 4 overview 3 4 asynchronous routing overview 3 14 sources and destinations 3 15 timing diagram 3 15 block diagram NI PXI 6653 functional overview 3 2 routing architecture 3 9 signal selection circuitry 3 10 C cable configuration 3 12 calibration certificate NI resources B 2 CE compliance specifications A 7 changing the Active LED color tip 3 4 CLKIN connector description 3 5 location diagram 3 3 specifications A 1 CLKOUT connector description 3 5 location diagram 3 3 signal description table 3 6 specifications A 2 clock generation DDS 3 7 National Instruments Corporation overview 3 7 PXI CLK10 and OCXO 3 8 color Access LED color exp
33. g architecture figure 3 9 routing signals front panel triggers using as inputs 3 11 using as outputs 3 12 generating a single pulse trigger 3 17 overview 3 9 possible sources and destinations table 3 11 PXI star triggers 3 14 RTSUPXI triggers 3 13 types asynchronous 3 14 synchronous 3 15 RTSI signal names note 3 7 RTSI PXI triggers front panel triggers as outputs 3 12 S safety specifications A 6 signal selection circuitry figure 3 10 signal source 3 10 possible sources table 3 11 single pulse generation 3 17 software NI resources B 1 software programming choices overview 1 2 software installing 2 1 source possible sources table 3 11 signal 3 10 specifications CE compliance A 7 CLKIN characteristics A 1 CLKOUT characteristics A 2 DDS characteristics A 5 electromagnetic compatibility A 6 environmental A 6 OCXO characteristics A 5 NI PXI 6653 User Manual l 4 PFI lt 0 5 gt input characteristics A 3 output characteristics A 4 physical A 5 power requirements A 6 PXI trigger characteristics A 4 PXI_STAR trigger characteristics A 4 safety A 6 star triggers See PXI_STAR lt 0 12 gt support technical B 1 synchronization clock See also PXI_Trig PXI_Star synchronization clock PFI synchronization clock overview 3 15 synchronous routing overview 3 15 possible sources and destinations 3 17 synchronization clock sources 3 17 timing diagram 3 16 T technica
34. goes from low to high this rising edge is transferred to the destination after a propagation delay through the module Figure 3 5 illustrates an asynchronous routing operation 3 14 ni com Chapter 3 Hardware Overview Propagation Delay Trigger Input Trigger Output Figure 3 5 Asynchronous Routing Operation Some delay is always associated with an asynchronous route and this delay varies among NI PXI 6653 modules depending on variations in temperature and chassis voltage Typical delay times in the NI PXI 6653 for asynchronous routes between various sources and destinations are given in Appendix A Specifications Asynchronous routing works well if the total system delays are not too long for the application Propagation delay could be caused by the following reasons e Output delay on the source e Propagation delay of the signal across the backplane s and cable s Propagation delay of the signal through the NI PXI 6653 e Time for the receiver to recognize the signal Both the source and the destination of an asynchronous routing operation on the NI PXI 6653 can be any of the following lines e Any front panel PFI pin PFI 0 5 e Any PXI star trigger line PXI STAR lt 0 12 gt e Any PXI RTSI trigger line PXI TRIG lt 0 7 gt Synchronous Routing A synchronous routing operation is defined in terms of three signal locations A source a destination and synchronization clock A digital signal co
35. ion clock The PFI synchronization clock may be any of the following signals e DDS clock e PXI CLKIO e PFIO Input e Any of the above signals divided by the first frequency divider 2 up to 512 e Any of the above signals divided by the second frequency divider 2 up to 512 Refer to the Choosing the Type of Routing section for more information on the synchronization clock B Note The PFI synchronization clock is the same for all routing operations in which PFI lt 0 5 gt 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 NI PXI 6653 User Manual 3 12 ni com Chapter 3 Hardware Overview Using the PXI RTSI Triggers The PXI RTSI triggers go to all the slots in the chassis All modules receive the same PXI RTSI triggers so PXI RTSI trigger 0 is the same for Slot 2 as it is for Slot 3 and so on This feature makes the PXI RTSI triggers convenient in situations where you want for instance to start an acquisition on several devices at the same time because all modules will receive the same trigger The frequency on the PXI RTSI triggers should not exceed 20 MHz to preserve signal integrity The signals do not reach each slot at precisely the same time A difference of several nanoseconds between slots can occur in an eight slot chassis However this delay is not a problem for many applications You can route signals to the PX
36. ion of better than 1 Hz within the range 1 Hz to 80 MHz The accuracy of the frequency depends on the PXI_CLK10 reference clock so a precise 10 MHz source improves the accuracy of the DDS output You can replace the 10 MHz clock with the OCXO for more accurate DDS timing PXI CLK10 and OCXO NI PXI 6653 User Manual The NI PXI 6653 features a precision 10 MHz OCXO The frequency accuracy of this clock is several orders of magnitude greater than the frequency accuracy of the native 10 MHz PXI backplane clock PXI CLK10 The main source of error in most frequency reference oscillators is temperature variation The OCXO houses the oscillator circuit inside a sealed oven A resistive heater and automatic feedback circuit maintain a precisely controlled operating temperature for the oscillator This temperature control scheme minimizes frequency error An NI PXI 6653 module located in Slot 2 of a PXI chassis can replace the native PXI 10 MHz backplane frequency reference clock PXI_CLK10 with the more stable and accurate output of the OCXO All other PXI modules in the chassis that reference the 10 MHz backplane clock benefit from this more accurate frequency reference Furthermore the DDS chip on the NI PXI 6653 references its output to the backplane clock and also takes advantage of the superior OCXO accuracy The OCXO does not automatically replace the native 10 MHz clock this feature must be explicitly enabled in software The OCXO output
37. l support B 1 terminating signals with resistors note 3 11 threshold voltage 3 11 training NI resources B 1 trigger bus See PXI TRIG lt 0 7 gt troubleshooting NI resources B 1 U unpacking the device 1 2 V voltage thresholds programming 3 11 W Web resources B 1 ni com
38. lanation table 3 4 Active LED color explanation table 3 4 configuring the device Access LED 3 4 Active LED 3 4 overview 2 2 conventions used in the manual vii D DDS clock generation 3 7 DDS clock PFI synchronization clock 3 12 PXI Trig PXI Star synchronization clock 3 13 routing to the CLKOUT connector 3 5 front panel triggers as outputs 3 12 signal description table 3 6 specifications A 5 Declaration of Conformity NI resources B 1 destinations possible destinations table 3 11 diagnostic tools NI resources B 1 direct digital synthesis See DDS documentation conventions used in manual vii NI resources B 1 related documentation viii drivers NI resources B 1 E electromagnetic compatibility specifications A 6 environmental specifications A 6 NI PXI 6653 User Manual Index equipment getting started 1 1 examples NI resources B 1 F frequency tuning word 3 7 front panel See also CLKIN connector CLKOUT connector PFI synchronization clock PFI connector descriptions 3 5 diagram 3 3 G generating a clock DDS 3 7 overview 3 7 PXI_CLK10 and OCXO 3 8 generating a single pulse trigger 3 17 getting started configuring the device 2 2 equipment 1 1 installing the hardware 2 1 installing the software 2 1 software programming choices 1 2 unpacking 1 2 global software trigger generating a single pulse 3 17 using front panel PFIs as outputs 3 12 using the PXI
39. mentation send email to ctechpubseni com 2003 National Instruments Corporation All rights reserved Important Information Warranty The NI PXI 6653 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 due to defects in materials and workmanship for a period of 90 days from date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period National Instruments does not warrant that the operation of the software shall be uninterrupted or error free A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instruments believes that the information in this document is accurate The document has been carefull
40. mes in on the source and is propagated to the destination after the edge has been realigned with the synchronization clock Unlike asynchronous routing the output of a synchronous routing operation does not directly follow the input after a propagation delay Instead the output waits for the next rising edge of the clock before it National Instruments Corporation 3 15 NI PXI 6653 User Manual Chapter 3 Hardware Overview NI PXI 6653 User Manual follows the input Thus the output is said to be synchronous with this clock Figure 3 6 shows a timing diagram that illustrates synchronous routing Setup Hold Time Time i tsetup t thol 4 gt lt Trigger Input Synchronization Clock Clock to Output Time tetog lt gt Trigger Output Figure 3 6 Synchronous Routing Operation Synchronous routing can send triggers to several places in the same clock cycle or send the trigger to those same places after a deterministic skew of a known number of clock cycles If a signal arrives at two chassis within the same clock cycle each NI PXI 6653 realigns the signal with the synchronization clock and distributes it to the modules in each chassis at the same time Synchronous routing can thus remove uncertainty about when triggers are received 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
41. mmended 50 Q loads 8 low or high drive The lower limit is load dependent because of the AC coupling This limit is less than 1 MHz for high impedance loads 2 With an external 50 Q splitter This value does not include cable attenuation or splitter insertion loss NI PXI 6653 User Manual A 2 ni com Appendix A Specifications PFI lt 0 5 gt Input Characteristics Frequency range eee DC to 100 MHz Input impedance sess 50 Q 5 or 1 KQ 5 software selectable Input coupling eeee DC Voltage level teme 0to5 V Absolute maximum input voltage System powered off 7 V max System powered on to 45 5 V max Input threshold Voltage level sss 0 3 to 4 3 V software selectable Voltage resolution 20 mV 8 bits io MC 40 mV EIySIET6SIS encre sites 10 mV Asynchronous delay tpa PFI lt 0 5 gt to PXI_TRIG lt 0 7 gt output 16 to 23 ns PFI lt 0 5 gt to PXI STAR lt 0 12 gt output 11 to 12 5 ns Synchronized trigger input setup time fuis esteso 8 ns Synchronized trigger input hold time ty 8 ns Stresses beyond those listed can cause permanent damage to the device Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability Functional operation of the device
42. multiple sources with different voltage swings The front panel PFI inputs can be routed to any PXI star triggers PXI RTSI triggers or other front panel PFI outputs National Instruments Corporation NI PXI 6653 User Manual Chapter 3 Hardware Overview Using Front Panel PFIs As Outputs The front panel PFI outputs are 3 3 V drivers with 50 Q output impedance The outputs can drive 50 loads such as a 50 Q coaxial cable with a 50 Q receiver This cable configuration is the recommended setup to minimize reflections With this configuration the receiver sees a single 1 6 V step a 43 3 V step split across the 50 Q resistors at the source and the destination You also can drive a 50 cable with a high impedance load The destination sees a single step to 3 3 V but the source sees a reflection This cable configuration is acceptable for low frequency signals or short cables You can select the signal source from the front panel triggers PFI lt 0 5 gt the PXI star triggers the PXI RTSI triggers or the synchronization clock PXI_CLK10 the DDS clock or PFI 0 The synchronization clock concept is explained in more detail in the Choosing the Type of Routing section You can independently select the output signal source for each PFI line from one of the following sources e Another PFI lt 0 5 gt e PXI RTSI triggers lt 0 7 gt PXI TRIG lt 0 7 gt e PXI STAR 0 12 e Global software trigger e PFI synchronizat
43. n and connects you to the experts by phone discussion forum or email Training Visit ni com training for self paced tutorials videos and interactive CDs You also can register for instructor led hands on courses at locations around the world System Integration If you have time constraints limited in house technical resources or other project challenges NI Alliance Program members can help To learn more call your local NI office or visit ni com alliance Declaration of Conformity DoC A DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electronic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni com hardref nsf B 1 NI PXI 6653 User Manual Appendix B Technical Support and Professional Services Calibration Certificate If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration If you searched ni com and could not find the answers you need contact 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 ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events NI
44. nada Compliance with EU Directives Users in the European Union EU should refer to the Declaration of Conformity DoC for information pertaining to the CE marking Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com hardref nsf search by model number or product line and click the appropriate link in the Certification column The CE marking Declaration of Conformity contains important supplementary information and instructions for the user or installer Contents About This Manual Conventions e EROS eH NU ER NI Te REN de RAUM ERE ETE SEE vii National Instruments Documentation eeeeeeeeeeeeeene nene nnn nnne nennen nene Vili Related Documentation ner tertie estet E reir ble EA Ue dn viii Chapter 1 Introduction What You Need to Get Started ccccccecesesessssscsscecescecsccececeseesesesssesessnesessseeesssseeeess 1 1 MIP ACK Giese ELE 1 2 Software Programming Choices sees eene entente nnne enne 1 2 safety Information ccs rct rte nee etes pude dae ats Melee E RARE ERN E 1 3 Chapter 2 Installing and Configuring Installing the Software n terree d eee detainee aes 2 1 Installing the Hard W re iea rir a eeu E veneto een 2 1 Configuring the Module sees een eere rennen eee 2 2 Chapter 3 Hardware Overview NIPXI 6653 Front Panel eee tete tete coset ceret case
45. nformation 5 cei ise Pete fet et eter te ettet e eevee 4 2 Appendix A Specifications Appendix B Technical Support and Professional Services Glossary Index NI PXI 6653 User Manual vi ni com About This Manual Conventions Thank you for purchasing the National Instruments NI PXI 6653 Timing and Synchronization Module The NI PXI 6653 enables you to pass PXI timing and trigger signals between two or more PXI chassis The NI PXI 6653 can generate and route clock signals between devices in multiple chassis providing a method to synchronize multiple devices in a multichassis PXI system This manual describes the electrical and mechanical aspects of the NI PXI 6653 and contains information concerning its operation and programming lt gt gt Ge bold italic The following conventions appear in this manual Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name for example DIO lt 3 0 gt The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box This icon denotes a tip which alerts you to advisory information This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to
46. outside the conditions indicated in the operational parts of the specifications is not implied 2 Relative to PXI CLKIO National Instruments Corporation A 3 NI PXI 6653 User Manual Appendix A Specifications Output Characteristics Frequency range eee DC to 100 MHz Output impedance eee 50 Q 5 Output coupling eeeneee DC Voltage level oue 1 6 V into 50 Q 3 3 V into open circuit Absolute maximum input voltage System powered off 7 V max System powered on 7 V to 5 5 V max Synchronized trigger clock tO QUE HME fei Sog odee gue qa dq e 10 ns Output to output skew synchronous 500 ps PXI STAR Trigger Characteristics PXI STAR lt 0 12 gt to PXI STAR lt 0 12 gt output skew at NI PXI 6653 backplane connector 400 ps Asynchronous delays tpa PXI STAR lt 0 12 gt to PFI lt 0 5 gt output 7 5 to 13 ns PXI_STAR lt 0 12 gt to PXI TRIG lt 0 7 gt output 13 to 19 ns PXI Trigger Characteristics Asynchronous delay tpa PXI TRIG lt 0 7 gt to PFI lt 0 5 gt output 11 to 16 ns Stresses beyond those listed can cause permanent damage to the device Exposure to absolute maximum rated conditions for extended periods of time can affect device reliability Functional operation of the device outside the conditions indicated in the o
47. perational parts of the specifications is not implied 2 Relative to PXI_CLK10 5 This specification applies to all synchronous routes to the PXI Star lines as well as asynchronous routes from the PFI inputs to the PXI Star lines NI PXI 6653 User Manual A 4 ni com OCXO Characteristics FrequenCcy i mee ee Warm up time to within 20 ppb of operating frequency one hour reading power off duration 1 hour Initial accuracy eeeeeees Long term stability Temperature stability 0 to 55 C DDS Characteristics Physical Frequency range eese Frequency resolution Frequency accuracy Chassis requirement Front panel connectors Front panel indicators Recommended maximum cable length nie Includes stability of OCXO and supporting circuitry 2 Includes temperature stability of OCXO and supporting circuitry 3 The DDS frequency inherits the relative frequency of PXI_CLK10 For example if you route the OCXO to PXI_CLK10 the DDS output inherits the same relative frequency accuracy as the OCXO output National Instruments Corporation A 5 Appendix A Specifications 50 ppb year 5 ppb referenced to 25 C 1 Hz to 80 MHz 711 nHz Equivalent to PXI_CLK10 accuracy One 3U CompactPCI or PXI slot PXI Slot 2 fo
48. performs two broad functions e Generating clock and trigger signals e Routing internally or externally generated signals from one location to another Table 3 3 outlines the function and direction of the signals that are discussed in detail in the remainder of this chapter National Instruments Corporation 3 5 NI PXI 6653 User Manual Chapter 3 Hardware Overview Table 3 3 Signal Descriptions Signal Name Direction Description PXI CLKIO IN Out This is a signal that can replace the native 10 MHz oscillator on the PXI backplane PXI CLKI10 IN may originate from the onboard OCXO 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 native 10 MHz oscillator in the chassis An NI PXI 6653 in Slot 2 can replace this signal with PXI CLKI1O IN OCXO Clock Out This is the output of the 10 MHz OCXO The OCXO is an extremely stable and accurate frequency source CLKIN In CLKIN is a signal connected to the SMB input pin of the same name CLKIN can serve as PXI CLKI10 IN or be used as a phase lock reference for the OCXO CLKOUT Out CLKOUT is the signal on the SMB output pin of the same name Either the OCXO clock or PXI_CLK10 may be routed to this location DDS Clock Out This is the output of the NI PXI 6653 DDS The DDS frequency can be programmed with fine granularity from 1 Hz to 80 MHz The DDS chip automatically phase lo
49. plugs into or is connected to the computer Use this documentation for hardware installation and configuration instructions specifications about the measurement hardware and application hints Software documentation Please refer to the readme htm file on the NI Sync Driver and Examples CD which ships with the device You can download NI documentation from ni com manuals Related Documentation NI PXI 6653 User Manual The following documents contain information that you might find helpful as you read this manual e PICMG 2 0 R3 0 CompactPCI Core Specification available from PICMG at www picmg org e PXI Specification Revision 2 1 available from www pxisa org e NI VISA User Manual available from ni com manuals e NI VISA Help included with the NI VISA software e NI Sync User Manual available from ni com manuals Viii ni com Introduction The NI PXI 6653 timing and triggering module enables you to pass PXI timing signals between two or more PXI chassis The NI PXI 6653 generates and routes clock signals between devices in multiple chassis providing a method for synchronizing multiple devices in a PXI system What You Need to Get Started To set up and use the NI PXI 6653 you need the following items Q Coo vo Q Q NI PXI 6653 Timing and Triggering Module NI PXI 6653 User Manual NI VISA NI Sync Driver and Examples CD One of the following software packages and documentation
50. pment in fixed installations distribution boards and circuit breakers Other examples are wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and stationary motors with permanent connections to fixed installations Installation Category IV is for measurements performed at the primary electrical supply installation 1 000 V Examples include electricity meters and measurements on primary overcurrent protection devices and on ripple control units Installation categories also referred to as measurement categories are defined in electrical safety standard IEC 61010 1 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation 5 MAINS is defined as a hazardous live electrical supply system that powers equipment Suitably rated measuring circuits may be connected to the MAINS for measuring purposes NI PXI 6653 User Manual 1 4 ni com Installing and Configuring This chapter describes how to install the NI PXI 6653 hardware and software and how to configure the device Installing the Software Refer to the readme htm file that accompanies the NI Sync Driver and Examples CD for software installation directions R Note Be sure to install the driver software before installing the NI PXI 6653 hardware Installing the Hardware The following are general installation instructions Consult the chassis user manual o
51. r full functionality SMB male 50 Q Two tricolor LEDs green red and amber NI PXI 6653 User Manual Appendix A Specifications Power Requirements FSV eti dvsesseebst s dede a dede tess abe 900 mA max 33 3 V Leve rro ernst cate i io utae 1 5 A max FIZ V 100 mA max Ub Ep a 100 mA max Environmental Operating temperature sess 0 to 55 C Storage temperature ssessss 25 to 85 C Humidity iet bn ERE 10 to 95 RH noncondensing Maximum altitude sssss 2 000 m Pollution Degree indoor use only 2 Safety The NI PXI 6653 meets the requirements of the following standards for safety and electrical equipment for measurement control and laboratory use e EC 61010 1 EN 61010 1 e UL2III I e CAN CSA C222 No 1010 1 Ss Note For UL and other safety certifications refer to the product label or to ni com Electromagnetic Compatibility FAI SS1ODS jess 1 tirer tee tette tr eren EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Titty teet tei carens EN 61326 1 1997 A1 1998 Table 1 EMC EMII eene CE C Tick and FCC Part 15 Class A Compliant Sy Note For EMC compliance you must operate this device with shielded cabling NI PXI 6653 User Manual A 6 ni com Appendix A Specifications CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows
52. r technical reference manual for specific instructions and warnings about installing new modules 1 2 Power off and unplug the chassis Choose an available PXI slot in the PXI chassis RE Note The NI PXI 6653 is usually installed in Slot 2 3 4 5 8 Remove the filler panel for the PXI slot you chose in step 2 Ground yourself using a grounding strap or by touching a grounded object Follow the ESD protection precautions described in the Unpacking section of Chapter 1 Introduction Insert the NI PXI 6653 into the PXI slot Use the injector ejector handle to fully insert the module into the chassis Screw the front panel of the device to the front panel mounting rail of the chassis Visually verify the installation Make sure the module is not touching other modules or components and is fully inserted into the slot Plug in and power on the chassis The NI PXI 6653 is now installed National Instruments Corporation 2 1 NI PXI 6653 User Manual Chapter 2 Installing and Configuring Configuring the Module The NI PXI 6653 is completely software configurable The system software automatically allocates all module resources The two LEDs on the front panel provide information about module status The NI PXI 6653 Front Panel section of Chapter 3 Hardware Overview describes the LEDs in greater detail Refer to Figure 3 2 NI PXI 6653 Front Panel for the parts locator diagram for the NI PXI 6653 NI
53. s Shes eee n tersre tec ONUS 3 3 Access BED inset ee valved IO ERUIT EFIE US 3 4 Active LED e hA rh a ette tutes eerte cec eere rives doe teva e egete s dee eee cadets 3 4 Connectors s oo etta m HP ERR 3 5 Har dw are Peatures eerte ti bet ete rte EG Ee dee Y Yeu ta 3 5 Clock Generaton Eee nenne 3 7 Direct Digital Synthesis DDS essere 3 7 PXI GEK1IO0 and OCXO i auae a anu 3 8 Routine Signals uo em ee eU eo ER SM I vont REERUER 3 9 Determining Sources and Destinations 00 0 0 eile ee eeceeseeceseeeeeeeeeaeenseeaeenes 3 10 Using Front Panel PFIs As Inputs eee 3 11 Using Front Panel PFIs As Outputs eene 3 12 Using the PXI RTSI Triggers eese 3 13 Using the PXI Star Triggers occie rnesa neiss 3 14 National Instruments Corporation V NI PXI 6653 User Manual Contents Choosing the Type of Routing seeeeseeeeeeeeeeeen reete 3 14 Asynchronous Routing csser sirini re eee eene 3 14 Synchronous Routing senesine reteni esiin 3 15 Generating a Single Pulse Global Software Trigger susse 3 17 Usmgthe PXI CEKTO PEL ee ertet pr e HR pieces 3 18 Chapter 4 Calibration Factory Calibration 2 uae e e tpa OP QR RR 4 1 OCXO Frequency i e eee eb e e etes 4 1 PXIZCLK10 Ph se e ee T n dA E gero ees 4 1 DDS Start Trigger Phase nenene Gora wien E N nome peg 4 1 DDS initial Phase ene ciate ast ines ens 4 2 Additional I
54. star triggers 3 14 using the PXI RTSI triggers 3 13 H hardware block diagram 3 2 configuring 2 2 connector descriptions 3 5 NI PXI 6653 User Manual l 2 installing 2 1 overview 3 5 help technical support B 1 installation category 1 4 hardware 2 1 software 2 1 instrument drivers NI resources B 1 K KnowledgeBase B 1 L LED Access LED 3 4 Active LED 3 4 light emitting diode See LED maximum signal rating caution 3 5 National Instruments support and services B 1 NI PXI 6653 configuration 2 2 connectors 3 5 functional overview 3 5 installation hardware 2 1 software 2 1 parts locator diagram 3 3 signal descriptions table 3 6 NI support and services B 1 ni com 0 OCXO clock generation 3 8 OCXO clock routing to the CLKOUT connector 3 5 using the PXI_CLK10 PLL 3 18 overview 3 8 specifications A 5 oven controlled crystal oscillator See OCXO P PFI PFI lt 0 5 gt connector description 3 5 location diagram 3 3 signal description table 3 7 PFI lt 0 5 gt signals asynchronous routing 3 15 front panel PFIs as inputs 3 11 front panel triggers as outputs 3 12 specifications A 3 using front panel PFIs as inputs 3 11 using front panel PFIs as outputs 3 12 PFI synchronization clock possible sources 3 12 using front panel PFIs as outputs 3 12 phase locked loop See PLL physical specifications A 5 PLL Active LED 3 4 routing from the CLKIN conne
55. the signal in the first clock cycle or it might see it in 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 In addition the polarity of the destination signal can be inverted which is useful when handling active low digital signals 3 16 ni com Chapter 3 Hardware Overview Possible sources for synchronous routing include the following sources e Any front panel PFI pin e Any PXI star trigger line PXI STAR lt 0 12 gt e Any PXI RTSI trigger line PXI TRIG lt 0 7 gt e Global software trigger e The synchronization clock itself 3 Note The possible destinations for a synchronous route are identical to those for an asynchronous route The destinations include any front panel PFI pin any PXI star trigger line or any PXI RTSI trigger line The synchronization clock for a synchronous route can be any of the following signals e 10 MHz PXI backplane clock signal e DDS clock on the NI PXI 6653 e Front panel PFI 0 input e One of two divided copies of any of the above three signals The NI PXI 6653 includes two clock divider circuits that can divide the synchronization clock signals by any power of 2 up to 512 Refer to Figures 3 3 and 3 4 for an illustration of how the NI PX
56. y reviewed for technical accuracy In the event that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control The warranty provided herein does not cover damages defects malfunctions or service failures caused by owner s
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