Related Manuals for NI PXI-6682H
Summary of Contents for NI PXI-6682H
- Page 1 NI PXI-6682 User Manual Timing and Synchronization Module for PXI NI PXI-6682 User Manual October 2007 372292A-01...
- Page 2 Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 662 457990-0, Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,...
- Page 3 Instruments Corporation. National Instruments respects the intellectual property of others, and we ask our users to do the same. NI software is protected by copyright and other intellectual property laws. Where NI software may be used to reproduce software or other materials belonging to others, you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction.
- Page 4 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...
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Page 5: 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 Front Panel ....................3-3 GPS LED ......................3-3 1588 LED ......................3-4 Speed LED.......................3-4 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 6 GPS Synchronization Best Practices............... 4-5 Appendix A Specifications Safety ......................A-9 Electromagnetic Compatibility ............... A-9 CE Compliance ....................A-9 Environmental Management ................A-9 Appendix B IRIG Protocol Overview Appendix C Technical Support and Professional Services Glossary Index NI PXI-6682 User Manual ni.com...
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Page 7: About This Manual
About This Manual This manual describes the electrical and mechanical aspects of the NI PXI-6682, 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 8: National Instruments Documentation
Use this documentation for hardware installation and configuration instructions, specifications about the measurement hardware, and application hints. • Software documentation—Refer to the NI-Sync User Manual, available at ni.com/manuals You can download NI documentation from ni.com/manuals... -
Page 9: Introduction
PXI embedded controller or a desktop computer connected to the PXI chassis using MXI hardware If you are using the NI PXI-6682 in a system to synchronize NI PXI-4472, NI PXI-5112, NI PXI-5411, NI PXI-6115, or E Series DAQ modules, you... -
Page 10: Unpacking
Chapter 1 Introduction Unpacking The NI PXI-6682 is shipped in an antistatic package to prevent electrostatic damage to the module. Electrostatic discharge (ESD) can damage several components on the module. Caution Never touch the exposed pins of connectors. To avoid such damage in handling the module, take the following precautions: •... -
Page 11: Safety Information
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 NI PXI-6682 User Manual... - Page 12 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 User Manual ni.com...
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Page 13: Installing And Configuring
Note Be sure to install the driver software before installing the NI PXI-6682 hardware. Installing the Hardware The following are general installation instructions. Consult the chassis user manual or technical reference manual for specific instructions and warnings about installing new modules. -
Page 14: Configuring The Module
Chapter 2 Installing and Configuring Configuring the Module The NI PXI-6682 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 front panel description sections of Chapter 3,... -
Page 15: Hardware Overview
Hardware Overview This chapter presents an overview of the hardware functions of the NI PXI-6682, shown in Figure 3-1. Figure 3-1. Isometric View of the NI PXI-6682 © National Instruments Corporation NI PXI-6682 User Manual... - Page 16 Chapter 3 Hardware Overview Figure 3-2 provides a functional overview of the NI PXI-6682. AC Coupled PXI_CLK10_IN CLKIN Clock Detector TCXO AC Coupling CLKOUT PXI_CLK10 To GPS GPS RF Antenna Detector PFI 0 IRIG-B Receiver PXI_STAR<0..12> Synchronization PFI0 Digital PXI_TRIG<0..7>...
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Page 17: Ni Pxi-6682 Front Panel
4 CLKOUT Connector 9 Ethernet ACT/LINK LED 5 CLKIN Connector 10 Ethernet Connector Figure 3-3. NI PXI-6682 Front Panel GPS LED The GPS LED indicates the status of the GPS hardware. Refer to Figure 3-3 for the GPS LED location. -
Page 18: 1588 Led
Blinking Green Master or Premaster (2 seconds) Faulty * 1588 has been disabled or stopped. Speed LED The Speed LED indicates the NI PXI-6682 Ethernet link speed. Refer to Figure 3-3 for the Speed LED location. NI PXI-6682 User Manual ni.com... -
Page 19: Act/Link Led
When there is no Ethernet link the Speed LED is off. ACT/LINK LED The ACT/LINK LED indicates the NI PXI-6682 Ethernet link condition. Refer to Figure 3-3 for the ACT/LINK LED location. Table 3-4 summarizes what the ACT/LINK LED colors represent. -
Page 20: Hardware Features
Connections that exceed any of the maximum ratings of input or output signals Caution on the NI PXI-6682 can damage the module, the computer, or other devices connected to the PXI-6682. NI is not liable for any damage resulting from such signal connections. - Page 21 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 in Slot 2 can replace this signal with PXI_CLK10_IN. Oscillator This is the output of the 10 MHz TCXO. The TCXO is a very stable and accurate frequency source.
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Page 22: 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 23: Routing Signals
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-6682 can route the TCXO, or PXI 10 MHz reference clock to CLKOUT. -
Page 24: Determining Sources And Destinations
Table 3-6 summarizes the sources and destinations of the NI PXI-6682. 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 indicates that the source and destination combination defined by that cell is a valid routing combination. -
Page 25: I/O Considerations
Mbps or 100 Mbps. The Ethernet port is auto-MDI capable, which means crossover cabling is not necessary when connecting the NI PXI-6682 to another network card. The NI PXI-6682 senses whether a crossed connection is needed and performs the action internally. The Ethernet port also allows for full duplex operation, so traffic can be sent and received at the same time. -
Page 26: Using Front Panel Pfi Terminals As Outputs
The front panel PFI terminals can be configured by software to accept input signals. Refer to the NI-Sync User Manual for information on how to set up the PFI terminals to accept input signals. You can use these terminals to timestamp triggers with the synchronized system time or to route signals to other destinations (refer to Table 3-6). -
Page 27: Note Regarding Pfi0
NI recommends transmitting clocks using the PXI_STAR triggers. However, if you must use the PXI Triggers, the frequency on the PXI Triggers should not exceed 20 MHz to preserve signal integrity. -
Page 28: Using The Pxi Star Triggers
1 ns. A typical upper limit for the skew in most 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. -
Page 29: Choosing The Type Of Routing
Choosing the Type of Routing The NI PXI-6682 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. -
Page 30: Synchronous Routing
Chapter 3 Hardware Overview • Time for the receiver to recognize the signal The source of an asynchronous routing operation on the NI PXI-6682 can be any of the following lines: • Any front panel PFI pin (PFI<0..2>) • Any PXI Star trigger line (PXI_STAR<0..12>) •... - Page 31 Any PXI star trigger line (PXI_STAR <0..12>) • Any PXI Trigger line (PXI_TRIG <0..7>) In the NI PXI-6682 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 32: Synchronization
This makes the GPS system a precise timing and synchronization source. The NI PXI-6682 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 uses to achieve sub-microsecond synchronization. - Page 33 PXI-6682 will be able to accept a 1kHz AM modulated IRIG-B 12X signal on its PFI0 input. When configured to synchronize to an IRIG-B DC source, the NI PXI-6682 will be able to accept an IRIG-B 00X DC encoded signal on its PFI0 input.
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Page 34: Ieee 1588
The NI PXI-6682 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 35: Operating Environment
Timing System Performance The NI PXI-6682 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 36: 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 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 requires signals from several satellites to be able to compute precise timing and location. -
Page 37: Appendix A Specifications
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 NI PXI-6682 User Manual... - Page 38 Functional operation of the device outside the conditions indicated in the operational parts of the specifications is not implied. Relative to CLKOUT when set up to route PXI_CLK10. NI PXI-6682 User Manual ni.com...
- 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. © National Instruments Corporation NI PXI-6682 User Manual...
- Page 40 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 to be able to synchronize accurately: • Seconds begin every minute at 0, increment to 59, and then roll-over to 0.
- Page 41 PXI_TRIG <0..7> output ....22 to 36 ns, typical PXI Trigger Characteristics PXI_TRIG <0..7> to PXI_TRIG <0..7> output skew at NI PXI-6682 backplane connector..< 5 ns, typical Asynchronous delay, t PXI_TRIG <0..7> to PFI <0..2> output ......18 to 34 ns, typical...
- Page 42 (green, red, and amber) for GPS and IEEE 1588 status, and two green LEDs for Ethernet link status and speed Recommended maximum cable lengths PFI, DC to 1.5 MHz ......200 m CLKOUT to CLKIN......200 m Ethernet CAT5.........100 m NI PXI-6682 User Manual ni.com...
- Page 43 6. IRIG-B AM matching specification was obtained by setting two PXI-6682 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. 7. IRIG-B performance depends on IRIG-B source stability and quality. © National Instruments Corporation NI PXI-6682 User Manual...
- Page 44 MIL-PRF-28800F.) Random Vibration Operating .........5 to 500 Hz, 0.3 g Nonoperating ........5 to 500 Hz, 2.4 g (Tested in accordance with IEC-60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.) NI PXI-6682 User Manual ni.com...
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Page 45: Safety
National Instruments is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers. © National Instruments Corporation NI PXI-6682 User Manual... - Page 46 Appendix A Specifications For additional environmental information, refer to the NI and the Environment Web page at . This page contains the ni.com/environment environmental regulations and directives with which NI complies, as well as any other environmental information not included in this document.
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Page 47: Irig Protocol Overview
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 User Manual... - Page 48 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 User Manual ni.com...
- Page 49 Figure B-1. IRIG-B AM and DC Transmission Example IRIG-B is one of the most common IRIG standards used. The following table describes how the information is transmitted when using IRIG-B each second. © National Instruments Corporation NI PXI-6682 User Manual...
- Page 50 Position identifier P 70–78 Control function bits Position identifier P 80–88 Nine lowest significant bits of time of day in straight binary seconds (bit 80 -> 2 … bit 88 -> 2 Position Identifier P NI PXI-6682 User Manual ni.com...
- Page 51 If the IRIG-B signal includes the year, then it also uses that information to synchronize its clock. Otherwise, it gets the year from the host computer. The NI PXI-6682 disregards the rest of the information contained in the IRIG-B signal. Therefore, when configured to synchronize to IRIG-B AM, the NI PXI-6682 supports IRIG-B 12X, and when configured to synchronize to IRIG-B DC, it supports IRIG-B 00X.
- Page 52 – Free Technical Support—All registered users receive free Basic Service, which includes access to hundreds of Application Engineers worldwide in the NI Discussion Forums at . National Instruments Application Engineers ni.com/forums make sure every question receives an answer.
- Page 53 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 to access the branch ni.com/niglobal...
- Page 54 – 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 User Manual...
- Page 55 (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 direct current electrostatic discharge NI PXI-6682 User Manual ni.com...
- Page 56 LabVIEW a graphical programming language light-emitting diode—a semiconductor light source © National Instruments Corporation NI PXI-6682 User Manual...
- Page 57 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. NI PXI-6682 User Manual ni.com...
- Page 58 PXI_Trig/PXI_Star the clock signal that is used to synchronize the PXI Triggers or PXI_STAR synchronization clock triggers on an NI PXI-6682 PXI Trigger the PXI timing bus that connects PXI devices directly, by means of connectors on top of the devices, for precise synchronization of functions...
- Page 59 Glossary setup time setup volts virtual instrument NI PXI-6682 User Manual ni.com...
- Page 60 ACT/LINK LED color explanation (table), 3-5 overview, 3-5 asynchronous routing Declaration of Conformity (NI resources), C-1 overview, 3-15 destinations, possible destinations (table), 3-11 sources and destinations, 3-16 diagnostic tools (NI resources), C-1 timing diagram, 3-15...
- Page 61 2-1 category, 1-4 software programming choices, 1-2 hardware, 2-1 unpacking, 1-2 software, 2-1 instrument drivers (NI resources), C-1 specifications, A-5 IRIG-B AM and DC transmission example (figure), B-3 GPS ANT connector IRIG-B synchronization, 4-1 description, 3-5...
- Page 62 PXI_TRIG <0..7> hardware, 2-1 asynchronous routing, 3-16 software, 2-1 signal description (table), 3-7 parts locator diagram, 3-3 specifications, A-5 NI support and services, C-1 related documentation, viii operating environment, 4-4 RJ-45 Ethernet connector description, 3-6 routing architecture (figure), 3-10 routing signals PFI <0..2>...
- Page 63 TCXO characteristics, A-5 specifications, A-5 timestamping characteristics, A-5 timing system performance, 4-4 Speed LED training and certification (NI resources), C-1 color explanation (table), 3-5 trigger bus. See PXI_TRIG <0..7> overview, 3-4 troubleshooting (NI resources), C-1 star triggers. See PXI_STAR <0..12>...
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