National Instruments PXIe-6674T Bedienungsanleitung

USER MANUAL

PXIe-6674T

PXI Express Timing and Synchronization Module

The PXIe-6674T enables you to pass PXI timing and trigger signals between PXI Express

chassis. The PXIe-6674T can generate and route clock signals between devices in multiple

chassis, providing a method to synchronize multiple devices in a multichassis PXI Express

system.

This manual describes the electrical and mechanical aspects of the PXIe-6674T and contains

information concerning its operation and programming.

National Instruments Documentation

The PXIe-6674T 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:

•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.

•PXIe-6674T Calibration Procedure, available from ni.com/manuals.

Contents

Introduction...............................................................................................................................2

Unpacking......................................................................................................................... 2

Software Programming Choices....................................................................................... 3

Safety Information............................................................................................................ 3

What You Need to Get Started..........................................................................................5

Installing and Configuring........................................................................................................ 5

Installing the Software...................................................................................................... 5

Installing the Hardware.....................................................................................................6

Configuring the Module....................................................................................................6

Hardware Overview.................................................................................................................. 7

PXIe-6674T Front Panel .................................................................................................. 9

Access LED.......................................................................................................................9

Active LED..................................................................................................................... 10

Connectors.......................................................................................................................11

Hardware Features...........................................................................................................11

Generating and Routing Clocks...................................................................................... 14

Routing Signals............................................................................................................... 20

Calibration...............................................................................................................................31

Factory Calibration......................................................................................................... 31

Additional Information................................................................................................... 31

Compliance............................................................................................................................. 31

Legal Information................................................................................................................... 32

Limited Warranty............................................................................................................ 33

Copyright........................................................................................................................ 34

Trademarks......................................................................................................................35

Patents............................................................................................................................. 36

Export Compliance Information..................................................................................... 36

WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS...... 36

Introduction

The PXIe-6674T timing and synchronization module enables you to share clocks and triggers

between modules in a PXI Express chassis and other PXI chassis or non-PXI systems. The

PXIe-6674T module generates and routes clock signals between devices in multiple chassis,

providing a method for synchronizing multiple devices in a PXI Express system. It also

features a precision OCXO for improving the stability and accuracy of the PXI Express

backplane reference clocks.

Unpacking

The PXIe-6674T is shipped in an antistatic package to prevent electrostatic damage to the

module. Electrostatic discharge (ESD) can damage the module.

2| ni.com | PXIe-6674T User Manual

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 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-6674T in the antistatic envelope when not in use.

Software Programming Choices

When programming the PXIe-6674T, 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 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 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.

PXIe-6674T User Manual | © National Instruments | 3

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.

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

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 measurements 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

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-6674T User Manual

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.

What You Need to Get Started

To set up and use the PXIe-6674T, you need the following items:

• PXIe-6674T Timing and Synchronization Module

• PXIe-6674T User Manual

• NI-Sync driver

• One of the following software packages and documentation:

– LabVIEW

– LabWindows™/CVI™

– Microsoft Visual C++ (MSVC)

• PXI EMC filler panels, National Instruments part number 778700-01

• PXI Express chassis

• PXI Express embedded controller or a desktop computer connected to the PXI Express

chassis using MXI-Express hardware.

The NI-Sync User Manual offers more detailed information on the software used to program

the PXIe-6674T. You can find this manual at ni.com/manuals.

Installing and Configuring

This chapter describes how to install the PXIe-6674T hardware and software and how to

configure the device.

Installing the Software

Refer to the readme.htm file tha accompanies the NI-Sync driver for software installation

directions.

Note Be sure to install the driver software before installing the PXIe-6674T

hardware.

PXIe-6674T User Manual | © National Instruments | 5

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. Locate the system timing slot for your PXI Express chassis. It is identified by the glyph

shown in Figure 1. on page 6:

Figure 1. System Timing Slot Indicator Glyph

3. Remove the filler panel for the system timing slot, if applicable.

4. Ground yourself using a grounding strap or by touching a grounded object. Follow the

ESD protection precautions described in the Unpacking section of the Introduction.

5. Carefully insert the PXIe-6674T into the system timing slot, making sure to not scrape

the module on any adjacent modules. 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. 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).

8. Visually verify the installation. Ensure that the module is fully inserted into the slot.

9. Plug in and power on the chassis.

The PXIe-6674T is now installed.

Configuring the Module

The PXIe-6674T 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 the Hardware Overview describe the LEDs in greater detail.

6| ni.com | PXIe-6674T User Manual

Hardware Overview

This chapter presents an overview of the hardware functions of the PXIe-6674T. Refer to

Figure 2. on page 8 for a functional overview of the PXIe-6674T hardware.

PXIe-6674T User Manual | © National Instruments | 7

Figure 2. PXIe-6674T Functional Overview

CLOCK and

TRIGGER

Routing

PCI Express

Interface

PCI Express

PXI_STAR<0..16>

PXI_TRIG<0..7>

CLKOUT

Clock

Generation

CLKIN AC Coupled

Clock Detector

PLL OCXO

PXI_CLK10_IN

OCXO

Calibration

DAC

OCXO

Clock

PXI_CLK10

Clock Generation

PXIe_DSTARA

Routing

PXI Express

PXIe_CLK100

PXIe_DSTARA

<0..16>

OCXO

CLK10

CLK100

PXIe_DSTARC

<0..16>

PXIe_DSTARB

<0..16>

PFI 0

Threshold

DAC

PFI 0

Driver/

Comparator

Driver/

Comparator

PFI 1

Threshold

DAC

LVDS Driver/

Receiver

PFI 1

PFI 2

Threshold

DAC

PFI 2

Driver/

Comparator

Driver/

Comparator

PFI 3

Threshold

DAC

LVDS Driver/

Receiver

PFI 3

PFI 4

Threshold

DAC

PFI 4

Driver/

Comparator

Driver/

Comparator

PFI 5

Threshold

DAC

LVDS Driver/

Receiver

PFI 5

PFI_LVDS

<0..2>

PFI<0..5>

CLKIN

8| ni.com | PXIe-6674T User Manual

PXIe-6674T Front Panel

Figure 3. PXIe-6674T Front Panel Connectors

1 2

Timing Module

NI PXIe-6674T

PFI 0/

LVDS

PFI 1/

LVDS

PFI 2/

LVDS

PFI 3/

LVDS

PFI 5/

LVDS

PFI 4/

LVDS

CLK

OUT

CLK

1. Access LED

2. Active LED

3. CLKOUT Connector

4. PFI<0..5> Connectors

5. CLKIN Connector

Access LED

The Access LED indicates the communication status of the PXIe-6674T. Refer to Figure 3. on

page 9 for the location of the Access LED.

Table 1. on page 10 summarizes what the Access LED colors represent:

PXIe-6674T User Manual | © National Instruments | 9

Table 1. Access LED Color Indications

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.

Blinking Red Module has detected an over-temperature condition.

Solid Red A hardware error has been detected.

Caution If the Access LED is observed to be blinking red, the module has detected

an over-temperature condition. Continued use of the PXIe-6674T in this condition is

not recommended as product reliability has been compromised. Since several

common problems can cause an over-temperature condition, please investigate the

following:

• Check that all chassis covers, filler panels, and/or slot blockers are installed.

• Make sure that the chassis fan speed is set to the highest setting.

• If applicable, check that the chassis fan air intake is not blocked and that the fan

filters are clean.

• Make sure that the ambient temperature around the chassis isn't above the rated

temperature specifications. If so, move the chassis to a cooler ambient

temperature location.

Caution If the Access LED is observed to be solid red, a hardware failure has been

detected that may impact the performance of the PXIe-6674T. Contact National

Instruments for support.

Active LED

The active LED indicates an error or phase-locked loop (PLL) activity. You can change the

Active LED to amber, unless an error overrides the selection. Refer to Figure 3. on page 9 for

the location of the active LED.

Tip Changing the Active LED color to amber is helpful when you want to identify

devices in a multichassis situation or when you want an indication that your

application has reached a predetermined section of the code.

Table 2. on page 11 summarizes what the Active LED colors represent.

10 | ni.com | PXIe-6674T User Manual

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