National Instruments Network Adapter NI PXIe-6672 Bedienungsanleitung

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

2| ni.com | PXIe-6672 User Manual

• 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.

4| ni.com | PXIe-6672 User Manual

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

ACCESS ACTIVE

1 2

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.

8| ni.com | PXIe-6672 User Manual

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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