Related Manuals for National Instruments NI PXI-6682
Summary of Contents for National Instruments NI PXI-6682
- Page 1 NI PXI-6682 Series User Manual NI PXI-6682 and NI PXI-6682H Timing and Synchronization Modules for PXI NI PXI-6682 Series User Manual March 2009 372292B-01...
- Page 2 Thailand 662 278 6777, Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545 For further support information, refer to the Technical Support and Professional Services appendix. To comment on National Instruments documentation, refer to the National Instruments Web site at and enter ni.com/info the info code feedback ©...
- Page 3 Warranty The NI PXI-6682 and NI PXI-6682H are 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.
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Page 4: Table Of Contents
Chapter 2 Installing and Configuring Installing the Software ....................2-1 Installing the Hardware....................2-1 Configuring the Module....................2-2 Chapter 3 Hardware Overview NI PXI-6682 Series Front Panel ..................3-3 GPS LED ......................3-4 1588 LED ......................3-4 Speed LED.......................3-5 ACT/LINK LED....................3-5 Connectors.......................3-5 Hardware Features ......................3-6 Clock and Event Generation ..................3-8 PXI_CLK10 and TCXO ..................3-8... - Page 5 Contents Brief Overview of PXI Synchronization Features .......... 3-13 Using the PXI Triggers ................... 3-15 Using the PXI Star Triggers (NI PXI-6682 only) ........... 3-16 Choosing the Type of Routing ................ 3-16 Asynchronous Routing ..............3-16 Synchronous Routing ............... 3-18...
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Page 6: About This Manual
About This Manual This manual describes the electrical and mechanical aspects of the NI PXI-6682 and NI PXI-6682H, and contains information concerning its operation and programming. Conventions 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,... -
Page 7: National Instruments Documentation
Platform following it applies only to that platform. NI PXI-6682 Series This term is used when the content would apply to either the NI PXI-6682 or the NI PXI-6682H. National Instruments Documentation The NI PXI-6682 Series User Manual is one piece of the documentation set for your measurement system. -
Page 8: Introduction
PXI system. What You Need to Get Started To set up and use the NI PXI-6682 Series, you need the following items: ❑ NI PXI-6682 Series Timing and Triggering Module ❑... -
Page 9: Unpacking
Notify NI if the module appears damaged in any way. Do not install a damaged module into the computer. Store the NI PXI-6682 Series in the antistatic envelope when not in use. Software Programming Choices The NI PXI-6682 Series uses NI Sync software as its driver. -
Page 10: Safety Information
Misuse of the product can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any way. If the product is damaged, return it to National Instruments for repair. Do not substitute parts or modify the product except as described in this document. - Page 11 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation. 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-6682 Series User Manual ni.com...
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Page 12: Installing And Configuring
Power off and unplug the chassis. Caution Do not install the NI PXI-6682 Series module in the system controller slot (slot 1) of a chassis. Choose an available slot in the chassis. : Install the NI PXI-6682 in an available PXI slot. -
Page 13: Configuring The Module
Chapter 1, Introduction. Remove any packing material from the front panel screws and backplane connectors. Insert the NI PXI-6682 Series module into the PXI/PXIe hybrid slot. Use the injector/ejector handle to fully insert the module into the chassis. -
Page 14: Hardware Overview
This chapter presents an overview of the hardware functions of the NI PXI-6682 Series, shown in Figure 3-1. 1 NI PXI-6682 2 NI PXI-6682H Figure 3-1. Isometric View of the NI PXI-6682 Series © National Instruments Corporation NI PXI-6682 Series User Manual... - Page 15 Chapter 3 Hardware Overview Figure 3-2 provides a functional overview of the NI PXI-6682 Series. Not in PXI-6682H AC Coupled PXI_CLK10_IN CLKIN Clock Detector TCXO AC Coupling CLKOUT PXI_CLK10 From GPS GPS RF Antenna Detector Not in PXI-6682H PFI 0...
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Page 16: Ni Pxi-6682 Series Front Panel
4 CLKOUT Connector 9 Ethernet ACT/LINK LED 5 CLKIN Connector 10 RJ-45 Ethernet Connector Figure 3-3. NI PXI-6682 Front Panel Note The NI PXI-6682H does not have the CLKIN connector, shown as item 5 in Figure 3-3. © National Instruments Corporation... -
Page 17: Gps Led
Table 3-2. 1588 LED Color Description Color Status Not using 1588* Amber Initializing Blinking Amber (2 seconds) Listening or Passive Green Uncalibrated or Slave Blinking Green (2 seconds) Master or Premaster Faulty * 1588 has been disabled or stopped. NI PXI-6682 Series User Manual ni.com... -
Page 18: Speed Led
Ethernet activity occurring Connectors This section describes the connectors on the front panel of the NI PXI-6682 Series. Refer to Figure 3-3 for the location of the connectors. • GPS ANT—GPS antenna RF input and DC power output for active GPS antenna. -
Page 19: Hardware Features
Connections that exceed any of the maximum ratings of input or output signals Caution on the NI PXI-6682 Series can damage the module, the computer, or other devices connected to the NI PXI-6682 Series. NI is not liable for any damage resulting from such signal connections. Hardware Features The NI PXI-6682 Series performs the following functions: •... - Page 20 PXI_CLK10 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-6682 Series in Slot 2 can replace this signal with PXI_CLK10_IN. Oscillator This is the output of the 10 MHz TCXO.
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Page 21: Clock And Event Generation
An NI PXI-6682 module 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 TCXO. All other PXI modules in the chassis that reference the 10 MHz backplane clock benefit from this improved reference. -
Page 22: Time-Synchronized Clock And Event Generation
PXI triggers. In addition, the polarity of the destination signal can be inverted, which is useful when handling active-low digital signals. The NI PXI-6682 also can route a 10 MHz clock from CLKIN to the PXI 10 MHz reference clock (the NI PXI-6682H does not have a CLKIN connector). -
Page 23: Determining Sources And Destinations
Table 3-6 summarizes the sources and destinations of the NI PXI-6682 Series. The destinations are listed in the horizontal heading row, and the sources are listed in the column at the far left. A in a cell... -
Page 24: I/O Considerations
Chapter 3 Hardware Overview indicates that the source and destination combination defined by that cell is a valid routing combination. Table 3-6. Sources and Destinations for NI PXI-6682 Series Signal Routing Operations Destinations Front Panel Backplane CLKOUT PFI<0..2> PXI_ PXI_Star... -
Page 25: Using Front Panel Pfi Terminals As Outputs
Do not attempt to drive signals into PFI terminals set up as outputs. Doing so can damage the NI PXI-6682 Series or the device driving the PFI terminal. The signal source for each PFI trigger line configured as an output can be independently selected from one of the following options: •... -
Page 26: Note Regarding Pfi0
PXI combines the Peripheral Component Interconnect (PCI) electrical bus with the rugged, modular Eurocard mechanical packaging of CompactPCI and adds specialized synchronization buses and key software features. © National Instruments Corporation 3-13 NI PXI-6682 Series User Manual... - Page 27 PXI slot. This 10 MHz signal can be sourced from the native PXI backplane oscillator or from a Slot 2 Controller Module installed in Slot 2 (such as the NI PXI-6682). The following sections describe in more detail the use of PXI triggers and PXI star triggers with the NI PXI-6682 series.
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Page 28: Using The Pxi Triggers
PXI_STAR triggers. However, the NI PXI-6682 Series does support routing of clocks to the PXI_Trigger lines, in case you must use them. For each PXI_Trigger line configured as an output in the NI PXI-6682 Series, the signal source can be independently selected from the following options: •... -
Page 29: Using The Pxi Star Triggers (Ni Pxi-6682 Only)
NI 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 NI PXI-6682 is able to route low skew triggers to the PXI_Star lines from any PFI line. - Page 30 Figure 3-6. Asynchronous Routing Operation Some delay is always associated with an asynchronous route, and this delay varies among NI PXI-6682 Series modules, depending on variations in temperature and chassis voltage. Typical delay times in the NI PXI-6682 Series for asynchronous routes between various sources and destinations are given in Appendix A, Specifications.
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Page 31: Synchronous Routing
If a signal arrives at two chassis within the same clock cycle, each NI PXI-6682 Series module realigns the signal with the synchronization clock and distributes it to the modules in each chassis at the same time. - Page 32 Any PXI star trigger line (PXI_STAR<0..12>) (NI PXI-6682 only) • Any PXI Trigger line (PXI_TRIG<0..7>) In the NI PXI-6682 Series, the synchronization clock for synchronous routes is always PXI_CLK10. Note The possible destinations for a synchronous route are identical to those for an asynchronous route.
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Page 33: Synchronization
This makes the GPS system a precise timing and synchronization source. The NI PXI-6682 Series has a GPS receiver which powers an active GPS antenna and receives and processes the RF signals (1.575 GHz) from the satellites. The GPS receiver then generates a very precise pulse-per-second (PPS) that the NI PXI-6682 Series uses to achieve sub-microsecond synchronization. - Page 34 IRIG-B 00X (DC). When configured to synchronize to an IRIG-B AM source, the NI PXI-6682 Series will be able to accept a 1 kHz AM modulated IRIG-B 12X signal on its PFI0 input. When configured to synchronize to an IRIG-B DC source, the NI PXI-6682 Series will be able to accept an IRIG-B 00X DC encoded signal on its PFI0 input.
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Page 35: Ieee 1588
GPS or IRIG-B, it will use its internal free-running timebase, which will be updated to the host computer’s system time during power up. The NI PXI-6682 Series is capable of using a PPS (pulse per second) signal for synchronization. Any PFI, PXI_Trigger or PXI_Star line can be configured as the PPS input terminal. -
Page 36: Operating Environment
Timing System Performance The NI PXI-6682 Series can generate or receive a 1 Hz pulse per second signal on any PFI or PXI Trigger terminal. You can set up this signal to transition on the seconds boundary of the synchronized system time. -
Page 37: Gps Synchronization Best Practices
If it is impossible to use a 100 Mbps network and you must run IEEE 1588 Note synchronization using a 10 Mbps network, ensure the network interface of the NI PXI-6682 Series is explicitly configured for 10 Mbps Full Duplex operation using the Windows configuration panels. GPS Synchronization Best Practices The embedded GPS receiver in the NI PXI-6682 Series requires signals from several satellites to be able to compute precise timing and location. -
Page 38: Appendix A Specifications
, typical Square wave rise/fall time (10 to 90%)..........0.5 ns min, 2.5 ns max CLKIN Characteristics (NI PXI-6682 only) CLKIN fundamental frequency ..... 10 MHz, sine or square wave Input impedance........50 Ω, nominal Input coupling ........AC Voltage range ......... 400 mV... - Page 39 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 specifications is not implied. NI PXI-6682 Series User Manual ni.com...
- Page 40 Functional operation of the device outside the conditions indicated in the operational parts of the specifications is not implied. The NI PXI-6682H does not have star trigger lines. © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 41 Input characteristics for IRIG-B DC..same as PFI digital input characteristics listed above The following assumptions are made regarding the received IRIG-B signal. All conditions must be met for the NI PXI-6682 Series to be able to synchronize accurately: • Seconds begin every minute at 0, increment to 59, and then roll-over to 0.
- Page 42 ......DC to 1.5 MHz Duty cycle ..........Programmable Note Clock signals generated on PFI, PXI_STAR (NI PXI-6682 only), or PXI Trigger lines must have a period and duty cycle that is a multiple of 10 ns. Minimum pulse width for timestamping ........
- Page 43 Maximum allowable cable signal loss at 1575.42 MHz ....17 dB The GPS antenna kit offered by National Instruments comes with a 30 m cable Note which has a loss of 15 dB/100 ft, making the total loss in the cable approximately 14.8 dB.
- Page 44 Appendix A Specifications Physical Chassis requirement NI PXI-6682 ........One 3U CompactPCI or PXI slot (PXI Slot 2 for full functionality) NI PXI-6682H......... One 3U CompactPCI, PXI, or PXIe hybrid slot Weight NI PXI-6682 ........235 g NI PXI-6682H......... 220 g Front panel connectors NI PXI-6682 ........
- Page 45 IRIG-B AM matching specification was obtained by setting two PXI-6682 Series boards to synchronize independently to the same IRIG-B AM source and generate a PPS. The offset between their PPS signals was then measured over a 12 hour period. IRIG-B performance depends on IRIG-B source stability and quality. NI PXI-6682 Series User Manual ni.com...
- Page 46 Relative humidity range ......5% to 95% noncondensing (Tested in accordance with IEC-60068-2-56.) Shock and Vibration Operational Shock........30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC-60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.) © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 47 ICES-001: Class A emissions Note For the standards applied to assess the EMC of this product, refer to the Online Product Certification section. For EMC compliance, operate this device with shielded cabling. Note NI PXI-6682 Series User Manual A-10 ni.com...
- Page 48 Waste Electrical and Electronic Equipment (WEEE) At the end of their life cycle, all products must be sent to a WEEE recycling EU Customers center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm National Instruments...
- Page 49 In addition to the characteristics of each standard described in the table above, each of those is subdivided further depending on the electrical characteristics of the signal used to transmit the data, and the actual data © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 50 The second’s boundary is embedded into the transmission by sending two consecutive position identifiers; the beginning of the second position identifier is the second’s boundary. NI PXI-6682 Series User Manual ni.com...
- Page 51 The figure shows the information transmitted using an amplitude modulated signal, and a pulse width modulated signal. Figure B-1. IRIG-B AM and DC Transmission Example © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 52 Position identifier P 50–53 Units of year or control function bits 55–58 Tens of year or control function bits Position identifier P 60–68 Control function bits Position identifier P 70–78 Control function bits Position identifier P NI PXI-6682 Series User Manual ni.com...
- Page 53 IRIG-B 12X, and when configured to synchronize to IRIG-B DC, it supports IRIG-B 00X. The following assumptions are made regarding the received IRIG-B signal. All conditions must be met for the NI PXI-6682 Series to be able to synchronize accurately: •...
- Page 54 Technical Support and Professional Services Visit the following sections of the award-winning National Instruments Web site at for technical support and professional services: ni.com • Support—Technical support at includes the ni.com/support following resources: – Self-Help Technical Resources—For answers and solutions,...
- Page 55 You also can visit the Worldwide Offices section of to access the branch ni.com/niglobal office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. NI PXI-6682 Series User Manual ni.com...
- Page 56 – negative of, or minus ° degree Ω alternating current application development environment asynchronous a property of an event that occurs at an arbitrary time, without synchronization to a reference clock © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 57 It is electrically compatible with the PCI Specification, which enables low-cost PCI components to be utilized in a mechanical form factor suited for rugged environments. NI PXI-6682 Series User Manual ni.com...
- Page 58 Global Positioning System; worldwide system that allows you to receive precise location and timing information. © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 59 Measurement & a controlled centralized configuration environment that allows you to Automation Explorer configure all of your National Instruments DAQ, GPIB, IMAQ, IVI, (MAX) Motion, VISA, and VXI devices NI PXI-6682 Series User Manual...
- Page 60 CompactPCI, with special mechanical, electrical, and software features. The PXIbus standard was originally developed by National Instruments in 1997, and is now managed by the PXIbus Systems Alliance. PXI star...
- Page 61 CtoQ hold time hold propagation delay time TRIG trigger signal trigger a digital signal that starts or times a hardware event (for example, starting a data acquisition operation) setup time setup volts virtual instrument NI PXI-6682 Series User Manual ni.com...
- Page 62 (table), 3-7 See also CLKIN connector specifications, A-1 1588 LED, 3-4 clock and event generation ACT/LINK LED, 3-5 overview, 3-8 connector descriptions, 3-5 clock generation GPS LED, 3-4 PXI_CLK10 and TCXO, 3-8 © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 63 Index NI PXI-6682 Series diagram, 3-3 synchronization, 4-1 best practices, 4-3 PFI, 3-6 Speed LED, 3-5 GPS, 4-1 front panel PFI terminals, using as inputs, 3-12 IEEE1855, 4-3 IRIG-B, 4-1 PPS, 4-3 help, technical support, C-1 generating a clock PXI_CLK10 and TCXO, 3-8...
- Page 64 3-10 PXI_CLK10_IN possible sources (table), 3-11 routing from the CLKIN software connector, 3-6 installing, 2-1 signal description (table), 3-7 NI resources, C-1 PXI_CLK10_OUT programming choices, overview, 1-2 signal description (table), 3-7 © National Instruments Corporation NI PXI-6682 Series User Manual...
- Page 65 C-1 unpacking the device, 1-2 synchronization accuracy, A-8 best practices, 4-3 GPS, 4-5 Web resources, C-1 IEEE 1588, 4-4 WEEE information, A-11 network topology, 4-4 GPS, 4-1 IEEE 1588, 4-3 IRIG-B, 4-1 NI PXI-6682 Series User Manual ni.com...