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PXI-6682

型号：

PXI-6682

描述：

GPS， IEEE 1588和IRIG -B的定时和同步模块的PXI和PXI Express[ GPS, IEEE 1588, and IRIG-B Timing and Synchronization Modules for PXI and PXI Express ]

品牌：

NI[ National Instruments ]

页数：

4 页

PDF大小：

702 K

下载PDF手册
GPS, IEEE 1588, and IRIG-B Timing and  
Synchronization Modules for PXI and PXI Express  
NI PXI-6682, NI PXI-6682H  
◾◾  
Synchronize PXI and PXI Express  
systems using GPS, IEEE 1588-2008,  
IRIG-B, or PPS  
Available for PXI systems, PXI-6682,  
and for PXI Express systems, PXI-6682H  
Onboard routing of internal and  
external clock and trigger signals  
Can be used as PXI slot 2 star  
trigger controller (not available  
on PXI-6682H)  
Operating Systems  
◾◾  
Windows 7/Vista/XP  
Recommended Software  
◾◾  
◾◾  
◾◾  
◾◾  
LabVIEW  
™
◾◾  
LabWindows /CVI  
Driver Software (included)  
◾◾  
NI-Sync  
PXI System Configuration  
◾◾  
Complete PXI system configuration  
◾◾  
Onboard high-stability 10 MHz  
reference (1 ppm)  
at ni.com/pxiadvisor  
>>For complete specifications and compliance information, see  
appendix A in the NI PXI-6682 user manual at ni.com/manuals.  
Overview  
The NI PXI-6682 and PXI-6682H timing and synchronization modules synchronize  
PXI and PXI Express systems using GPS, IEEE 1588, IRIG-B, or PPS to perform  
synchronized events. You can use them to generate events and clock signals  
at specified synchronized future times and timestamp input events with the  
synchronized system time. When installed in slot 2 of a PXI chassis, the  
NI PXI-6682 routes 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. Because of this, you can greatly improve the accuracy  
of measurements, implement advanced triggering schemes, or synchronize  
multiple devices and/or multiple chassis to act as a single system for high-  
channel-count applications. Table 1 compares the features of different NI timing  
and synchronization product offerings.  
Features  
Front Panel Connectivity  
CLK in  
NI PXI-6651  
NI PXI-6652  
NI PXI-6653  
NI PXIe-6672  
NI PXI-6682/H  
3
–
3
3
3
3
3
3
32  
3
CLK out  
General-purpose PFI lines  
GPS, IEEE 1588, IRIG-B  
Time References  
GPS  
2 SMB  
–
6 SMB  
–
6 SMB  
–
6 SMB  
–
3 SMB  
3
–
–
–
–
–
–
–
–
3
3
3
IEEE 1588  
IRIG-B  
–
–
–
–
Programmable Voltage Threshold  
Trigger Routing  
3
3
3
3
Star trigger source (PXI_STAR)  
PXI trigger bus (PXI_TRIG)  
Onboard Clock Sources  
10 MHz timebase  
3
3
3
3
3
3
3
3
32  
3
–
–
TCXO (1 ppm)  
OCXO (50 ppb)  
TCXO (1 ppm)  
TCXO (1 ppm)  
DC to 1.5 MHz  
Programmable clock1  
DC to 105 MHz (DDS)  
DC to 105 MHz (DDS)  
DC to 105 MHz (DDS)  
1Frequency resolution of <0.075 Hz for NI PXI-6652, PXI-6653, and PXIe-6672. For NI PXI-6682, the clock period and duty cycle have to be a multiple of 10 ns.  
2Not available on the hybrid-compatible version of the module, the PXI-6682H.  
Table 1. Features Comparison for Various NI Timing and Synchronization Modules Including the PXI-6682 and PXI-6682H  
GPS, IEEE 1588, and IRIG-B Timing and Synchronization Modules for PXI and PXI Express  
Synchronize PXI and PXI Express Systems  
Using GPS, IEEE 1588, or IRIG-B  
With the PXI-6682 and PXI-6682H, you can use GPS, IEEE 1588, IRIG-B, or PPS  
signals as the time reference to synchronize with other devices or PXI and  
PXI Express systems. You have not only a synchronized clock for multiple PXI  
and PXI Express systems but also a common time reference. Because of this,  
you can generate synchronized future time events and timestamp incoming  
signals with the synchronized time.  
The GPS receiver on the PXI-6682 and PXI-6682H can power an active GPS  
antenna and receive and process the RF signals (1.575 GHz) from satellites. It  
generates a very precise pulse-per-second (PPS) signal that the PXI-6682 and  
PXI-6682H use to achieve submicrosecond synchronization. Because of this,  
Figure 2. Functional Overview of the PXI-6682  
you can use the PXI-6682 and PXI-6682H to synchronize spatially located PXI  
and PXI Express systems as long as GPS satellites are visible to the antenna  
from those locations. Furthermore, once the PXI-6682 and PXI-6682H are  
synchronized to GPS, they can function as IEEE 1588 grandmasters to achieve  
synchronization of external 1588 devices. NI-Sync 3.1 or later supports  
IEEE 1588-2008. NI-Sync 3.0 is available on the Web for those who need  
IEEE 1588-2002 support.  
Note: The PXI-6682H does not have PXI_STAR trigger lines, shown as  
PXI_STAR<0..12> in Figure 2. The PXI-6682H does not have the CLKIN circuitry  
or the ability to drive PXI_CLK10_IN.  
Star Trigger Bus  
10 MHz  
Clock  
PXI-6682 as a Star Trigger Controller  
The PXI-6682 provides full control of the timing and synchronization features  
of the PXI backplane (Figure 3). To act as a PXI star trigger controller or to offer  
a high-accuracy, free-running 10 MHz reference clock, the PXI-6682 must be  
installed in slot 2 of the PXI chassis, as shown in Figure 1. It is capable of routing  
signals to and from the front panel, the PXI star triggers, and the PXI triggers.  
In addition, you can invert the polarity of the destination signal, which is useful  
when handling active-low digital signals. The PXI-6682 can also route a 10 MHz  
clock from CLKIN to the PXI 10 MHz reference clock and route the TCXO or PXI  
10 MHz reference clock to CLKOUT. Refer to Figure 2 for the PXI-6682 functional  
block diagram.  
Local  
Bus  
132 MB/s, 33 MHz, 32-Bit PCI Bus  
PXI Trigger Bus  
Figure 3. Diagram of Synchronization Features in the PXI Backplane  
Synchronizing PXI Express Systems  
with the PXI-6682H  
You can use the PXI-6682H in any PXI hybrid-compatible slot in PXI Express  
chassis with PXI hybrid slots. By using the PXI-6682H in such a system, you  
can timestamp events and create future time events on the PXI_TRIG lines as  
well as reference your system time to GPS, IEEE 1588, or IRIG-B. The PXI-6682H  
is essentially the same module as the PXI-6682 except NI has removed one  
connector so the PXI-6682H can plug into PXI Express systems. For this reason,  
you cannot drive PXI_CLK10, the PXI_STAR trigger lines, or any of the PXI  
Express clocks and triggers. If you wish to override CLK_10 in a PXI Express  
system, you can route a coaxial cable from CLKOUT on the PXI-6682H to the  
10 MHz clock input on the rear of the PXI Express chassis (if the chassis you  
have selected has this input). To drive the PXI_STAR trigger lines, you must also  
incorporate a PXI Express timing module such as the NI PXIe-6672.  
Figure 1. The PXI-6682 is connected to an active GPS antenna and installed in a system  
timing slot (slot 2) of an NI PXI-1042 chassis.  
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)  
2
GPS, IEEE 1588, and IRIG-B Timing and Synchronization Modules for PXI and PXI Express  
Synchronization Accuracy  
NI-Sync Software  
Table 2 lists the synchronization accuracy that the PXI-6682 and PXI-6682H offer  
while operating in various modes.  
The included NI-Sync driver software provides powerful yet easy-to-use control  
of PXI-6682 and PXI-6682H modules. You can use NI application development  
environment (ADE) software such as LabVIEW or LabWindows/CVI, or other  
ADEs such as Visual C/C++, for programming the PXI-6682 and PXI-6682H.  
For NI-Sync example programs, visit ni.com/examples.  
Mode1  
Synchronization Accuracy  
±100 ns, <13 ns std deviation  
±±7 ns, <10 ns std deviation  
±210 ns, <35 ns std deviation  
±25 ꢀs, <150 ns std deviation  
±55 ns, <13 ns std deviation  
±1 ꢀs, <220 ns std deviation  
±5 ꢀs, <500 ns std deviation  
±±7 ns, <10 ns std deviation  
GPS2  
IEEE 1588 3 m Ethernet direct connection3  
IEEE 1588 via hub3,±  
IEEE 1588 via switch3,5  
IRIG-B DC  
>>For complete specifications and compliance information, see  
appendix A in the NI PXI-6682 user manual at ni.com/manuals.  
IRIG-B AM matching6,7  
IRIG-B AM to source7  
PPS  
Ordering Information  
NI PXI-6682 (GPS, IEEE 1588, IRIG-B) ............................................779929-01  
NI PXI-6682H (GPS, IEEE 1588, IRIG-B)..........................................781059-01  
GPS antenna with 30 m coaxial cable...........................................19630±-30  
SMB 200  
1All synchronization measurements were done by recording the offset between PPS signals generated  
by two PXI-6682 modules inside a closed NI PXI-1031 chassis at ambient room temperature conditions.  
Synchronization was performed for 15 minutes before testing began. All test durations were 12 hours.  
2For the GPS test, two PXI-6682 modules were independently synchronized to GPS and configured to  
generate a PPS signal. The specification above represents empirical results. Please note that GPS  
satellites are guaranteed to be within only 100 ns of UTC. Therefore, the offset between any two  
synchronized devices can be as high as 200 ns plus the offset of that device to GPS.  
3Sync interval of 1 second was used for IEEE 1588 tests, and all Ethernet connections were 100 Mb/s.  
±Netgear DS10± hub used.  
SMB plug to SMB plug coax, 50 W, 1 m ..............................188859-01  
SMB 210  
Dual SMB plug to dual SMB plug coax, 50 W, 1 m..............188858-01  
5Airlink101 gigabit over copper switch used. For this test, a moderate amount of non-1588 Ethernet  
traffic was present on the switch.  
6IRIG-B AM matching specification was obtained by setting two PXI-6682 modules to synchronize  
independently to the same IRIG-B AM source and generate a PPS signal. The offset between their  
PPS signals was then measured over a 12-hour period.  
BUY NOW  
For complete product specifications, pricing, and accessory information,  
7IRIG-B performance depends on IRIG-B source stability and quality.  
call 800 813 3693 (U.S.) or go to ni.com/pxi.  
Table 2. NI PXI-6682 and PXI-6682H Synchronization Accuracy  
High-Stability 10 MHz Timebase  
When configured as a star trigger controller, the PXI-6682 can override the  
built-in 10 MHz reference clock on a PXI chassis. Most PXI chassis provide a  
10 MHz reference clock with 25 ppm accuracy (10 MHz ±250 Hz). This accuracy  
is improved to 1 ppm with the PXI-6682. Many modules, such as NI PXI-5xxx  
modular instruments, have phase-locked loop (PLL) circuitry to synchronize with  
the 10 MHz reference clock.  
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)  
3
NI Services and Support  
NI has the services and support to meet  
Local Sales and Technical Support  
In offices worldwide, our staff is local to the country, giving you access to  
engineers who speak your language. NI delivers industry-leading technical  
support through online knowledge bases, our applications engineers,  
and access to 1±,000 measurement and automation professionals within NI  
Developer Exchange forums. Find immediate answers to your questions at  
ni.com/support.  
I
your needs around the globe and through  
A
the application life cycle – from planning  
and development through deployment and  
SERVICE  
NEEDS  
ongoing maintenance. We offer services  
and service levels to meet customer  
requirements in research, design, validation,  
and manufacturing.  
P
E
V
Y
We also offer service programs that provide automatic upgrades to your  
application development environment and higher levels of technical support.  
Visit ni.com/ssp.  
Visit ni.com/services.  
Training and Certification  
NI training is the fastest, most certain route to productivity with our products.  
NI training can shorten your learning curve, save development time, and reduce  
maintenance costs over the application life cycle. We schedule instructor-led  
courses in cities worldwide, or we can hold a course at your facility. We also  
offer a professional certification program that identifies individuals who have  
high levels of skill and knowledge on using NI products.  
Hardware Services  
System Assurance Programs  
NI system assurance programs are designed to make it even easier for you  
to own an NI system. These programs include configuration and deployment  
services for your NI PXI, CompactRIO, or Compact FieldPoint system. The NI Basic  
System Assurance Program provides a simple integration test and ensures that  
your system is delivered completely assembled in one box. When you configure  
your system with the NI Standard System Assurance Program, you can select  
from available NI system driver sets and application development environments  
to create customized, reorderable software configurations. Your system arrives  
fully assembled and tested in one box with your software preinstalled. When  
you order your system with the standard program, you also receive system-  
specific documentation including a bill of materials, an integration test report,  
a recommended maintenance plan, and frequently asked question documents.  
Finally, the standard program reduces the total cost of owning an NI system  
by providing three years of warranty coverage and calibration service. Use the  
online product advisors at ni.com/advisor to find a system assurance program  
to meet your needs.  
Visit ni.com/training.  
Professional Services  
Our NI Professional Services team is composed of NI applications and systems  
engineers and a worldwide National Instruments Alliance Partner program of  
more than 600 independent consultants and integrators. Services range from  
start-up assistance to turnkey system  
integration. Visit ni.com/alliance.  
OEM Support  
We offer design-in consulting and product integration assistance if you want to  
use our products for OEM applications. For information about special pricing and  
services for OEM customers, visit ni.com/oem.  
Calibration Services  
NI recognizes the need to maintain properly calibrated devices for high-  
accuracy measurements. We provide manual calibration procedures, services  
to recalibrate your products, and automated calibration software specifically  
designed for use by metrology laboratories. Visit ni.com/calibration.  
Repair and Extended Warranty  
NI provides complete repair services for our products. Express repair and  
advance replacement services are also available. We offer extended warranties  
to help you meet project life-cycle requirements. Visit ni.com/services.  
n
ni.com 800 813 3693  
n
National Instruments info@ni.com  
©2009 National Instruments. All rights reserved. CVI, LabVIEW, FieldPoint, National Instruments, National Instruments Alliance Partner, NI, and ni.com are trademarks of National Instruments. The mark LabWindows is used under a  
license from Microsoft Corporation. Windows is a registered trademark of Microsoft Corporation in the United States and other countries. Other product and company names listed are trademarks or trade names of their respective  
companies. A National Instruments Alliance Partner is a business entity independent from National Instruments and has no agency, partnership, or joint-venture relationship with National Instruments. 0718  
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