National Instruments Network Adapter NI PXIe-6672 Manuel utilisateur
USER MANUAL
PXIe-6672
Timing and Synchronization Module for PXI Express
The PXIe-6672 can generate and route clock and trigger signals between devices in a single
chassis or multiple chassis, providing a method to synchronize multiple devices in a PXI
Express system.
This manual describes the electrical and mechanical aspects of the PXIe-6672 and contains
information concerning its operation and programming.
Conventions
Caution 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 the Introduction for precautions to
take.
National Instruments Documentation
The PXIe-6672 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 Help, 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.
•NI-Sync User Manual, available from ni.com/manuals.
•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.
Contents
Introduction...............................................................................................................................2
What You Need to Get Started..........................................................................................2
Unpacking.........................................................................................................................3
Software Programming Choices....................................................................................... 3
Safety Information............................................................................................................ 3
Installing and Configuring........................................................................................................ 5
Installing the Software...................................................................................................... 5
Installing the Hardware.....................................................................................................5
Configuring the Module....................................................................................................6
Hardware Overview..................................................................................................................6
PXIe-6672 Front Panel..................................................................................................... 8
Hardware Features.......................................................................................................... 10
Clock Generation and Routing........................................................................................11
Routing Triggers............................................................................................................. 13
Calibration.............................................................................................................................. 21
Factory Calibration......................................................................................................... 21
Additional Information................................................................................................... 22
Compliance............................................................................................................................. 22
Electromagnetic Compatibility Information...................................................................23
Legal Information................................................................................................................... 23
Limited Warranty............................................................................................................ 24
Copyright........................................................................................................................ 25
Trademarks......................................................................................................................26
Patents.............................................................................................................................27
Export Compliance Information..................................................................................... 27
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS...... 27
Introduction
The PXIe-6672 can generate and route clock and trigger signals between devices in a single
chassis or multiple chassis, providing a method to synchronize multiple devices in a PXI
Express system.
What You Need to Get Started
To set up and use the PXIe-6672, you need the following items:
• PXIe-6672 Timing and Synchronization Module
• PXI Express chassis
• PXI Express embedded controller or a desktop computer connected to the PXI Express
chassis using MXI-Express hardware.
• PXI EMC filler panels, National Instruments part number 778700-01
• NI-Sync driver
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• One of the following software packages and documentation:
– LabVIEW
– LabWindows™/CVI™
– Microsoft Visual C++ (MSVC)
• PXIe-6672 User Manual
The NI-Sync User Manual offers more detailed information on the software used to program
the PXIe-6672. You can find this manual at ni.com/manuals.
Unpacking
The PXIe-6672 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 the 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 the 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 PXIe-6672 in the antistatic envelope when not in use.
Software Programming Choices
When programming the PXIe-6672, 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++.
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 video interface,
code generation tools, and the LabWindows/CVI Data Acquisition and Easy I/O libraries.
Safety Information
The following section contains important safety information that you must follow when
installing and using the PXIe-6672.
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.
PXIe-6672 User Manual | © National Instruments | 3
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
suitable 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 or disconnecting
them from the product.
Operate the product at or below the measurement category1 marked 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. Measurement
categories establish standard impulse to withstand voltage levels that commonly occur in
electrical distribution systems. The following is a description of measurement categories:
• Measurement Category I is for measurements performed on circuits not directly
connected to the electrical distribution system referred to as MAINS3 voltage. This
category is for measurements of voltages from specially protected secondary circuits.
Such voltage measurements include signal levels, special hardware, limited-energy parts
of hardware, circuits powered by regulated low-voltage sources, and electronics.
• Measurement Category II is for measurements performed on circuits directly connected
to the electrical distribution system (MAINS3). This category refers to local-level
electrical distribution, such as that provided by a standard wall outlet (for example, 115
1Measurement categories, also referred to as overvoltage or installation categories, are defined in
electrical safety standard IEC 61010-1 and IEC 60664-1.
2Working voltage is the highest rms value of an AC or DC voltage that can occur across any
particular insulation.
3MAINS is defined as a hazardous live electrical supply system that powers hardware. Suitably
rated measuring circuits may be connected to the MAINS for measuring purposes.
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AC voltage for U.S. or 230 AC voltage for Europe). Examples of Measurement Category
II are measurements performed on household appliances, portable tools, and similar
hardware.
• Measurement Category III is for measurement performed in the building installation at
the distribution level. This category refers to measurements on hard-wired hardware such
as hardware 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.
• Measurement Category IV is for measurements performed at the primary electrical
supply installation typically outside buildings. Examples include electricity meters and
measurements on primary overcurrent protection devices and on ripple control units.
Installing and Configuring
This section describes how to install the PXIe-6672 hardware and software and how to
configure the device.
Installing the Software
Refer to the readme.htm file that accompanies the NI-Sync software for software installation
directions.
Note Be sure to install the driver software before installing the PXIe-6672
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 slot in the chassis. The PXIe-6672 can be installed in a System
Timing Slot (marked by either a square glyph shown in Figure 1. on page 5 or a square
glyph with a circle inside of it, as shown in Figure 2. on page 6), or in a non-timing
PXI Express (PXIe) slot.
Note Star trigger functionality and the ability to replace PXI_CLK10 are not
available when the PXIe-6672 is installed in a non-timing PXIe slot.
Figure 1. System Timing Device Slot Indicator Glyph without Circle
PXIe-6672 User Manual | © National Instruments | 5
Figure 2. System Timing Device Slot Indicator Glyph on the PXIe-1062Q Chassis
Note The slot number printed on the glyph may vary from chassis to chassis.
3. Remove the filler panel for the PXI slot you located in step 2, if applicable.
4. Ground yourself using a grounding strap or by holding a grounded object. Follow the
ESD protection precautions described in the Unpacking section of the Introduction
section.
5. Remove any packing material from the front panel screws and backplane connectors.
6. Insert the PXIe-6672 into the PXI Express slot. Use the injector/ejector handle to fully
insert the module into the chassis.
7. Screw the front panel of the device to the front panel mounting rail of the chassis.
8. If adjacent slots are not populated, use EMC filler panels to cover the opening.
Caution
– To ensure the specified EMC performance, you must install PXI EMC
filler panels, National Instruments part number 778700-01, in all open
chassis slots.
– To ensure the specified EMC performance, operate this product only with
double-shielded cables and accessories (for example, RG-223 cables).
9. Visually verify the installation. Make sure the module is not touching other modules or
components and is fully inserted into the slot.
10. Plug in and power on the chassis.
The PXIe-6672 is now installed.
Configuring the Module
The PXIe-6672 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 PXIe-6672
Front Panel on page 8 section describes the LEDs in greater detail.
Hardware Overview
This chapter presents an overview of the hardware functions of the PXIe-6672. Figure 3. on
page 7 provides a functional overview of the PXIe-6672 hardware.
6| ni.com | PXIe-6672 User Manual
Figure 3. Functional Overview of the PXIe-6672
PXIe-6672 User Manual | © National Instruments | 7
PXIe-6672 Front Panel
NI PXIe-6672
Timing Module
CLK
OUT
PFI 0
PFI 1
PFI 2
PFI 3
PFI 4
PFI 5
CLK
IN
ACCESS ACTIVE
1 2
3
4
5
1. Access LED
2. Active LED
3. CLKOUT Connector
4. CLKIN Connector
5. PFI<0..5> Connectors
Access LED
The Access LED indicates the communication status of the PXIe-6672.
Table 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.
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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.
Tip Changing the Active LED color to amber is helpful when you want to identify
devices in a multi-chassis situation or when you want an indication that your
application has reached a predetermined section of the code.
Table 2. Active LED Color Quick Reference Table
Color Status
Off Module is not yet functional
Green PLL active
Amber User-defined
Red PXI_CLK10 has stopped, or there is a PLL error
Connectors
This section describes the connectors on the front panel of the PXIe-6672.
• CLKIN—AC-coupled, 50 Ω clock input. CLKIN can be programmatically routed to:
– Directly to PXI_CLK10_IN for distribution to other modules in the chassis.
– The reference input of the onboard oscillator's PLL circuit to route to
PXI_CLK10_IN for distribution to other modules in the chassis.
– Any PXI_STAR line.
Note Refer to the PXIe-6672 Specifications for the frequency ranges for each
one of these uses for CLKIN.
• CLKOUT—Clock Output. This connector is used to source a clock that can be routed
programmatically from the temperature-compensated crystal oscillator (TCXO), direct
digital synthesis (DDS), or the backplane clock (PXI_CLK10).
• PFI<0..5>—Programmable Function Interface<0..5>. 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 PXIe-6672 Front Panel on page 8 for a diagram showing the locations of these
connections on the PXIe-6672 front panel.
Caution Connections that exceed any of the maximum ratings of input or output
signals on the PXIe-6672 can damage the module and the computer. National
Instruments is not liable for any damage resulting from such signal connections.
PXIe-6672 User Manual | © National Instruments | 9
Hardware Features
The PXIe-6672 performs two broad functions:
• Generating clock and trigger signals.
• Routing internally or externally generated signals from one location to another.
Table 3. on page 10 outlines the function and direction of the signals discussed in detail in the
remainder of this chapter.
Table 3. Signal Descriptions
Signal Name Direction Description
PXI_CLK10_IN Out This is a signal that can replace the native 10 MHz
oscillator on the PXI backplane. PXI_CLK10_IN may
originate from the onboard TCXO 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. A PXIe-6672 in the System Timing Slot can
replace this signal with PXI_CLK10_IN.
TCXO Clock Out This is the output of the 10 MHz TCXO. The TCXO 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 be routed directly to
PXI_CLK10_IN, used as a phase lock reference for the
TCXO, or be routed to a PXI_STAR line.
CLKOUT Out CLKOUT is the signal on the SMB output pin of the same
name. Either the TCXO clock, DDS clock, or PXI_CLK10
may be routed to this location.
DDS Clock Out This is the output of the DDS. The DDS frequency can be
programmed with fine granularity from 1 Hz to 105 MHz.
The DDS chip automatically phase-locks to PXI_CLK10.
PXI_STAR <0..16> In/Out The PXI star trigger bus connects the System Timing Slot to
all other slots in a star configuration. The electrical paths of
each star line are closely matched to minimize intermodule
skew. A PXIe-6672 in the System Timing Slot can route
signals to all other slots using the star trigger bus.
10 | ni.com | PXIe-6672 User Manual
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