NI PXI-6682 User manual

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NI PXI-6682 User Manual
Timing and Synchronization Module for PXI
NI PXI-6682 User Manual
October 2007
372292A-01
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Important Information
Warranty
The NI PXI-6682 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 carefully 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
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failures caused by owner’s failure to follow the National Instruments installation, operation, or maintenance instructions; owner’s modification of the
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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 generates 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 numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
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/certification, 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.
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©National Instruments Corporation v NI PXI-6682 User Manual
Contents
About This Manual
Conventions ...................................................................................................................vii
National Instruments Documentation ............................................................................viii
Related Documentation..................................................................................................viii
Chapter 1
Introduction
What You Need to Get Started ......................................................................................1-1
Unpacking......................................................................................................................1-2
Software Programming Choices ....................................................................................1-2
Safety Information .........................................................................................................1-3
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
Time-Synchronized Clock and Event Generation...........................................3-8
Routing Signals..............................................................................................................3-9
Determining Sources and Destinations ...........................................................3-10
I/O Considerations .........................................................................................................3-11
Using the Ethernet Port ...................................................................................3-11
Using Front Panel PFI Terminals as Outputs ..................................................3-12
Using Front Panel PFI Terminals as Inputs.....................................................3-12
Note Regarding PFI0.......................................................................................3-13
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Contents
NI PXI-6682 User Manual vi ni.com
Using the PXI Triggers ................................................................................... 3-13
Using the PXI Star Triggers............................................................................ 3-14
Choosing the Type of Routing ........................................................................ 3-15
Asynchronous Routing ..................................................................... 3-15
Synchronous Routing ....................................................................... 3-16
Chapter 4
Synchronization
GPS................................................................................................................................ 4-1
IRIG-B........................................................................................................................... 4-1
IEEE 1588 ..................................................................................................................... 4-3
PPS ................................................................................................................................ 4-3
Synchronization Best Practices ..................................................................................... 4-3
Operating Environment................................................................................... 4-4
Timing System Performance ............................................................ 4-4
IEEE 1588 Synchronization Best Practices .................................................... 4-4
Network Topology............................................................................ 4-4
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
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©National Instruments Corporation vii NI PXI-6682 User 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,
DIO<3..0>.
»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
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 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 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.
monospace 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.
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About This Manual
NI PXI-6682 User Manual viii ni.com
National Instruments Documentation
The NI PXI-6682 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:
• Measurement hardware documentation—This documentation contains
detailed information about the measurement hardware that 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—Refer to the NI-Sync User Manual,
available at ni.com/manuals.
You can download NI documentation from ni.com/manuals.
Related Documentation
The following documents contain information that you might find helpful
as you read this manual:
•PICMG 2.0 R3.0, CompactPCI Core Specification, available from
PICMG at www.picmg.org
•PXI Specification, Revision 2.1, available from www.pxisa.org
•NI-VISA User Manual, available from ni.com/manuals
•NI-VISA Help, included with the NI-VISA software
•NI-Sync User Manual, available from ni.com/manuals
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©National Instruments Corporation 1-1 NI PXI-6682 User Manual
1
Introduction
The NI PXI-6682 enables you to synchronize PXI systems using GPS,
IEEE 1588, IRIG-B or PPS to perform synchronized events. The NI
PXI-6682 can generate events and clock signals at specified synchronized
future times and timestamp input events with the synchronized system
time. The PXI-6682 also allows you to route clock signals and triggers with
low skew within a PXI chassis or between 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-6682, you need the following items:
❑NI PXI-6682 Timing and Triggering Module
❑NI PXI-6682 User Manual
❑NI-VISA
❑NI-Sync CD
❑One of the following software packages and documentation:
–LabVIEW
– LabWindows/CVI™
– Microsoft Visual C++ (MSVC)
❑PXI chassis
❑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
can refer to the NI-Sync User Manual, which you can find on the NI-Sync
CD or download from ni.com/manuals.
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Chapter 1 Introduction
NI PXI-6682 User Manual 1-2 ni.com
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:
• Ground yourself using a grounding strap or by touching a grounded
object.
• 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-6682 in the antistatic envelope when not in use.
Software Programming Choices
The NI PXI-6682 uses NI Sync software as its driver.
When programming the NI PXI-6682, you can use NI application
development environment (ADE) software such as LabVIEW or
LabWindows/CVI, or you can use other ADEs such as Visual C/C++ to
interface with the NI Sync software.
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 LabVIEW
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.
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Chapter 1 Introduction
©National Instruments Corporation 1-3 NI PXI-6682 User Manual
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 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:
• Pollution Degree 1 means no pollution or only dry, nonconductive
pollution occurs. The pollution has no influence.
• Pollution Degree 2 means that only nonconductive pollution occurs in
most cases. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
• 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.
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Chapter 1 Introduction
NI PXI-6682 User Manual 1-4 ni.com
Operate the product at or below the installation category1marked on the
hardware label. Measurement circuits are subjected to working voltages2
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
MAINS3voltage. 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 equipment 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.
1 Installation categories, also referred to as measurement categories, are defined in electrical safety standard IEC 61010-1.
2 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.
3 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.
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©National Instruments Corporation 2-1 NI PXI-6682 User Manual
2
Installing and Configuring
This chapter describes how to install the NI PXI-6682 hardware and
software and how to configure the device.
Installing the Software
Refer to the readme.htm file that accompanies the NI-Sync CD for
software installation directions.
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.
1. Power off and unplug the chassis.
2. Choose an available PXI slot in the PXI chassis.
Note The NI PXI-6682 is usually installed in Slot 2.
3. Remove the filler panel for the PXI slot you chose in step 2.
4. 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.
5. Insert the NI PXI-6682 into the PXI slot. Use the injector/ejector
handle to fully insert the module into the chassis.
6. Screw the front panel of the device to the front panel mounting rail of
the chassis.
7. Visually verify the installation. Make sure the module is not touching
other modules or components and is fully inserted into the slot.
8. Plug in and power on the chassis.
The NI PXI-6682 is now installed.
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Chapter 2 Installing and Configuring
NI PXI-6682 User Manual 2-2 ni.com
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, Hardware Overview,
describe the LEDs in greater detail.
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©National Instruments Corporation 3-1 NI PXI-6682 User Manual
3
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
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Chapter 3 Hardware Overview
NI PXI-6682 User Manual 3-2 ni.com
Figure 3-2 provides a functional overview of the NI PXI-6682.
Figure 3-2. Functional Overview of the NI PXI-6682
Synchronization
Clock Generation
and
Routing
Circuitry
PCI Interface
PXIPCI
PXI_STAR<0..12>
PXI_TRIG<0..7>
PXI_CLK10_IN
CLKIN AC Coupled
Clock Detector
PXI_CLK10
PFI 0 IRIG-B
Receiver
PFI 1
PFI 2
TCXO
CLKOUT AC Coupling
To GPS
Antenna
GPS RF
Detector
PFI0 Digital
Ethernet
Controller
Ethernet
Port
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Chapter 3 Hardware Overview
©National Instruments Corporation 3-3 NI PXI-6682 User Manual
NI PXI-6682 Front Panel
Figure 3-3 shows the connectors and LEDs on the front panel of the
NI PXI-6682.
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.
Table 3-1 summarizes what the GPS LED colors represent.
1 GPS LED
2 1588 LED
3 GPS Antenna Connector
4 CLKOUT Connector
5 CLKIN Connector
6 PFI0/IRIG-B Input Connector
7 PFI <1..2> Connectors
8 Ethernet Speed LED
9 Ethernet ACT/LINK LED
10 Ethernet Connector
NI PXI-6672
Timing Module
12
4
5
7
GPS 1588
CLK
OUT
CLK
IN
PFI1
PFI2
PFI0/
IRIG-B
IN
10/100 ACT/LINK
GPS
ANT
3
10
8
9
6
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Chapter 3 Hardware Overview
NI PXI-6682 User Manual 3-4 ni.com
1588 LED
The 1588 LED indicates the status of the 1588 synchronization protocol.
Refer to Figure 3-3 for the 1588 LED location.
Table 3-2 summarizes what the 1588 LED colors represent.
Speed LED
The Speed LED indicates the NI PXI-6682 Ethernet link speed. Refer to
Figure 3-3 for the Speed LED location.
Table 3-1. GPS LED Color Description
Color Status
Off Not using GPS*
Amber Attempting to start self survey
Blinking Amber Self survey in progress
Blinking Green Self survey complete (normal operation)
Red Error**
* The GPS LED is turned off if GPS is not set as the time reference.
** An error is generated when the antenna is disconnected, when there is an antenna
malfunction, or when there is a hardware malfunction.
Table 3-2. 1588 LED Color Description
Color Status
Off Not using 1588*
Amber Initializing
Blinking Amber
(2 seconds)
Listening or Passive
Green Uncalibrated or Slave
Blinking Green
(2 seconds)
Master or Premaster
Red Faulty
* 1588 has been disabled or stopped.
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Chapter 3 Hardware Overview
©National Instruments Corporation 3-5 NI PXI-6682 User Manual
Table 3-3 summarizes what the Speed LED colors represent.
Note 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.
Connectors
This section describes the connectors on the front panel of the
NI PXI-6682.
•GPS ANT—GPS antenna RF input and DC power output for active
GPS antenna. This connector provides 5 VDC for an active antenna.
This connector also serves as the input for the RF signal coming in
from the GPS antenna.
•CLKOUT—Clock Output. This connector is used to source a 10 MHz
clock that can be routed programmatically from the
temperature-compensated crystal oscillator (TCXO) or backplane
clock (PXI_CLK10).
•CLKIN—Clock Input. This connector supplies the module with
a clock that can be programmatically routed to the PXI backplane
(PXI_CLK10_IN) for distribution to the other modules in the chassis.
Table 3-3. Speed LED Description
Color Status
Off 10 Mbps
Green 100 Mbps
Table 3-4. ACT/LINK LED Color Description
Color Status
Off No Ethernet link
Green Ethernet link established
Blink Ethernet activity occurring
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