Using PXI-6682(H) in PXI Express chassis to replace backplane clock

I have a PXI-6682H in a PXIe-1075 which I use for event timestamping. I also have a PXIe-6672 card in the timing slot.
I would like to replace the 10 MHz backplane clock to use the 6682 as a GPS disciplined oscillator and synchronize multiple PXI chasses.
I understand from the block diagram in the manual that the PXI-6682H does not possess the connection to directly replace the backplane clock as the PXI-6682 does in a PXI chassis.
Is there any way for me to replace this clock? Perhaps using an external connection? If so could you briefly explain how this would work and what software steps would be required?

Hello Gregoryng,
It might work since the PXIe-6672 and the PXIe-6674T are both timing and synchronization modules, but the best option would be the PXIe-6674T, which is able to work with other protocols such as GPS while the other cannot. It seems that in the video they use GPS.
I think the PXIe-6672 will not work for this with the PXI-6682H, but you can give it a try.
The one in the video seems to be a PXIe-6674T.
Regards.
Ernesto.

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Hi
Does anyone know how to set up an NI PXIe 1078 chassis so it will power up as soon as power is applied?
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Hi Steve,
Ah ok I did not realise that, if you go to this link page 2-12 you will see instructions to change the power inhibit switch in th chassis this should allow you to bypass the switch on the front of the chassis and control the power from the backplane. Remeber through that when using a MXI system the powerup order is important and you need to ensure that the slave chassis is powered on first.
I hope this helps, sorry for the mix up.
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National Instruments

Can i use PXIe-1073 with an embedded PXIe controller PXIe-8108

I have a PXI express chassis PXIe-1073 with an integrated controller MXI-Express controller PCIe-8361. I now want to use the chassis as a standalone system with an embedded controller.
(a)Can i use PXIe-1073 chassis with PXIe-8108 embedded controller
(b)Can i use a windows based laptop to control the PXIe-1073 via the PCIe-8361 integrated controller.

Hello kanad,
The PXIe-1073 is a MXI-integrate chassis. This means that the MXI card that would normally go into the controller slot (slot 1) is built into the chassis. The PCIe-8361 or Expresscard8360 are placed into the desktop or laptop, respectively, and connect to the chassis. The cards in the PXIe-1073 then appear as if they are part of the desktop of laptop.
Since the controller is built into the chassis, the PXIe-1073 does not have a slot 1. Controllers, such as the 8108 can only be plugged into slot 1. Therefore, the PXIe-1073 can only be controlled by the desktop or laptop MXI link. It cannot run standalone with an embedded controller.
Consider reading page 1-3 and 1-6 in the manual below:
NI PXIe-1073 User Manual and Specifications
Regards,
George T.
Applications Engineering Specialist
National Instruments UK and Ireland

How do I use the PXI_clk10 backplane clock? It's not there!

Hi, folks!
This might seem a trivial question, but I'm completely at a loss here. I have made an RT-project in LV8 which (among other things) samples data continuously from two cards located in a PXI-system. All 32 (16+16) differential channels are used and one task for each card is configured in MAX. Since signal phase is an issue, I need to synchronize both tasks accurately. The lv8 code examples have a couple of VIs that should have been directly applicable to my situation, and I have studied them (and lots of others) in detail.
I have attached one example below that seemed to be spot on, and it makes use of the external PXI_Clk10 clock located in the pxi backplane. Here the confusion starts. When you attach a constant to the "source" input of the "sample clock" VI you get a drop-down list of possible sources. In the example code, PXI_Clk10 is chosen in this list, but when I try to do the same I discover that this option is simply not present. Only internal timing sources (located on the cards) can be chosen. If I configure the timing of the tasks directly in MAX, the PXI_Clk10 is an available option, but this leads to a vague error message when I start the tasks saying roughly that "it might be that you did not specify a name for the external sample clock...".
I have tried everything. My PXI-settings in MAX, routing signals via PFI-pins (didn't work at all), etc etc.
What is going on? Also: when routing a signal through a pfi-port, does this necessitate connecting the pfi-connectors physically or is the signal routed internally through the backplane? It doesn't help that I use BNC-2110 connector blocks. How can I be sure that the connectors on these blocks actually correspond to the terminals on the cards? I can't find a wiring diagram anywhere on the web.
Some facts: PXI-1031 chassis with PXI-8184 controller (dual boot) and two cards PXI-6229 / PXI-6259. These cards are located in slot 3-4.
Regards, Einar
Attachments:
Multi-Device Synch-Analog Input-Cont Acquisition.vi ‏77 KB

All PXI chassis produce PXI_CLK10 on the backplane (from an on-board 10 MHz oscillator), and most of them can also receive a 10 MHz clock from Slot 2 and broadcast that on the backplane. Some models can receive 10 MHz from a BNC connector on the back. Similarly, both 10 MHz and 100 MHz clocks are always available on PXI Express chassis.
Unfortunately, the 6143 and 6133 have no provision to connect to PXI_CLK10. This is likely because the master clock on those boards is 20 MHz, and there may not have been board space or room in the cost budget for a PLL to lock it to 10 MHz. Many other PXI products can use PXI_CLK10, such as the 6120. There is a list of products which use CLK10 and other PXI features here:
http://digital.ni.com/public.nsf/allkb/F4AD3B87DC8CD62E862571E3007042E5
I suspect this list is a little outdated; perhaps someone reading this knows where a more updated version is.
Hope this helps,
Ed

How to use PXI Star Trigger for PXIe-5663 in PXIe-1075 chassis

HI all,
I have this sytem configuration:
PXIe-8135 controller. Windows 7 64-bit, RFSA 2.7.5. NI-SYNC 3.4.1
PXIe-1075 chassis
PXIe-5663 (2x)
PXIe-6672 Timing & Sync Card (slot #10)
I want to trigger the recording of my Digitizer with an external trigger.
The External Trigger is connected to PFI0 of the PXIe-6672 Timing card.
Then, the PXIE-6672 card routes the trigger to the backplane of the PXIe-1072 (Destination "NISYNC_VAL_PXITRIG0")
The PXIe-5663 are triggered with “NIRFSA_VAL_PXI_TRIG0_STR” as the source.
The trigger fires my PXIe-5663 correctly, but the timing is not tight (> 5ns).
I would like to use the PXI Star trigger instead, I think that I should be able to acheive much better synchronization with this.
But NI-RFSA won't let me do this:
When I try to call
"niRFSA_ConfigureDigitalEdgeStartTrigger(rfsa_session, NIRFSA_VAL_PXI_STAR_STR , NIRFSA_VAL_RISING_EDGE)", I get the error:
"Specified Route Cannot Be Satisfied, Because the Hardware Does Not Support It"
I don't understand why the PXIe-5663E would not be able to use that Route.
Any idea?
Regards,
Serge
Serge Malo, ing.
Concepteur logiciel
Software Developer
T (514) 842-7577 x648 | [email protected]

That explanation isn't quite right. Usually, even PXIe modules have a connection to PXI_Star. The PXIe standard added the PXIe_DStar trigger buses, and it also preserved the PXI_Star bus from the PXI standard.
However, there is an additional twist in this situation. I'm assuming that your PXIe-5663 includes a PXIe-5622 as the digitizer. It turns out that a synchronization technique called NI-TClk has eliminated the need for our more recent digitizers to rely on triggering from PXI_Star. I was able to find some documentation that includes this information, here and here. Given that, I think you have two options that should result in better synchronization.
The first option is to use TClk; I found an example program that demonstrates using TClk to acheive phase coherent signal acquisition across two 5663s. The second option is to use cables of matched length to connect two PFI front panel terminals of the timing board (6672) to the PFI1 front panel terminals of the digitizers (5622). The timing board would accept the external trigger on PFI0 and then issue triggers on PFI1 and PFI2 with around 500 ps of skew (manual, page A-4) . The digitizers would use NIRFSA_VAL_PFI1_STR as the trigger. I hope one of these solutions will meet the demands of your particular application.
I will also follow up with the owners of the RFSA product documentation to see if we can include a note about why PXI_Star is not supported in some cases.
James Blair
NI R&D

Using Keysight M9037A Controller in a NI PXIe-1075 Chassis, need to add a slave PXIe-1065 Chassis

Hello,
I have a bit of an odd configuration and I was hoping someone could confirm whether or not the PXIe-8374 will fulfill my needs or not, and if there is some other product that will.
Our master chassis is a NI PXIe-1075. It has a Keysight M9037A controller installed, which is working perfectly with all of the PXI cards we have installed in the chassis. However, we have a PXIe-1065 Chassis that we now need to make a slave to our PXIe-1075. In the case that we were using an NI controller, I know that a NI PXIe-8374 in the master and a NI PXIe-8370 in the slave would be the solution. However, it is unclear to me wheter or not the NI PXIe-8374 will work in a chassis (even an NI chassis) with an non-NI controller. I was hoping someone would be able to clear that up for me.
Thanks,
Alex

Thank you. That's what I suspected, but I wasn't sure.
Part of my confusion came from a paragraph in the related datasheet (found at http://www.ni.com/datasheet/pdf/en/ds-327 ):
"National Instruments provides several chassis expansion MXI products you can use to create multichassis PXI systems that interface to the same system computer. The system computer in the master PXI chassis can be either an NI embedded controller or a PC connected via an NI remote controller."
It kind of implies that the chassis expansion MXI products only work with PCs or NI embedded controllers, and not with other embedded controllers.

Can I use a PXI-1033I chassis (part number 779756-01) with a desktop PC via Port PCIe as well as with a notebook via ExpressCard ?

I have bought a PXI-1033I chassis (part number 779756-01) which we connect to a desktop PC via Port PCIe using a 779500-03 cable. Now we also have the requirement of using that chassis with a notebook. From NI web site we have seen that this should be possible by means of an ExpressCard.
My doubts are:
1)       Is it fully compatible PXI-1033I chassis (part number 779756-01) with an ExpressCard?
2)       If question 1) is yes, what do I need to add to my acquisition system to connect the PXI-1033 (part number 779756-01) to a notebook?. I mean, I need:
-          a ExpressCard ?
-          a new connecting cable ?
-          a new port for the chassis ?
-          a special port in the notebook ?
-          what are the minimum requirements for the notebook ?
3)       What are the part numbers I need to buy?.
Thanks

dbanner,
You can definitely acess the shared variables in a LabVIEW Project with CVI/LabWindows. To do this you will have to use the DataSocket API. I have attached a link below that will discuss this in more detail. Look for the section on programatic acess.
Using the LabVIEW Shared Variable
http://zone.ni.com/devzone/conceptd.nsf/webmain/5b4c3cc1b2ad10ba862570f2007569ef
Steven

PXIe 8262 streaming performance with HDD 8264 on a PXIe 1062Q chassis

Hello,
I have a PXIe 1062Q chassis, running Win XP, with one 8262 connected to an HD8264 and two PXIe 6537 installed, all the three board being on the express slots (3, 4 and 5). Running the benchmark application for testing the streaming speed (Win32FileIO) I get something like 100 MB/s with data chunks of about 4 MB, and around 140 MB/s with chunk of 64 M. How can improve these results toward the theoretical limit off 600 MB/s? Is there any software/driver trick to be applied?
And, in case, which is the best way to exploit the 8262 from C++ written code (using the NI libraries)? Is there anything similar to the Win32FileIO library? I tried using the RAID system from a c++ test program, and the performance seems very poor, while I would need, if not the 600 MB/s rate, at least something around 200 MB/s of continuous streaming.
Thanks in advance,
Piero.
Solved!
Go to Solution.

Hi Neil,
I actually have a 8130 controller, and in fact that was not the problem: I found the problem being the file-caching performed by Windows file system. If you use standard fstream calls from C source code you cannot bypass it, but by using Windows native call (CreateFile(...), WriteFile(...) APIs) and setting the flag for no data caching or buffering inside the call, I managed to get the full bandwith of 600 MBytes/s.
Anyway thanks for the quick reply!
Piero
I'm guessing you have a controller that only
supports x1 PCI Express. The PXIe-8130 is our highest-bandwidth
controller, with four x4 links going to the chassis. In the case of
the 1062, each of slots 3, 4 and 5 get a dedicated link from the
controller. x1 links max out at about 200 MB/s and x4 links max out at
800 MB/s.
So your first step is to use an embedded
controller or use MXI Express x4 instead of x1 back to a host
computer. While the PXIe-8130 is the best for high-bandwidth data
transfers, the PXIe-8106 should also be sufficient for your needs.
If
you want to stream data to disk from a PXIe-6537, it is already built
into DAQmx. You simply specify a file name, and the data goes to
disk. If you want to stream *from* disk, you'll have to do that on
your own. Here is a C/CVI example for streaming digitizers to disk
using a C API and the Windows File I/O functions.
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Principal Engineer
National Instruments

Synchronize 2 PXI Systems through GPS using PXI 6552

I want to synchronize two PXI systems separated by a distance of 5kms through GPS.
PXI 6682 is a timing and synchronization card which can be used to achieve this. I also have a requirement to use PXI 6552 HSDIO in my application. Few channels in PXI 6552 are free. So i want to know if it is possible to achieve GPS Synchronization of the two PXI systems using PXI 6552.
Regards,
Sundar Ganesh

Hi Ryan,
This is a system configuration which i am doing for a requirement. The requirement is RF Generation in one PXI system and RF Acquisition in another PXI system separated by a distance of 2kms. The applications that will be running at both these PXI systems may be started at different times. So i am thinking of using a PXI card in both the chassis to synchronize them through GPS.
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Sundar
Attachments:
PXI Configuration.JPG ‏21 KB

How do you configure multiple PXI 1011 chassis' in MAX?

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Hi,
So it sounds like you have two PXI systems that are not connected or related to each other, is that right? Since your PXI chassis connected via MXI-3 is working fine, we�ll take that out of the equation.
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http://digital.ni.com/public.nsf/websearch/3a4d2f5f4354e53a862568c0006a8bc0?OpenDocument
http://digital.ni.com/public.nsf/websearch/5CC9792C6CD4A34C862565BC0072D5DF?OpenDocument
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How to use PXI-8532 in LabVIEW Development Environment?

Hi,
I want to know how to use PXI-8532 in LabVIEW Development Environment.
I'm using
1. Windows7 32bit
2. LabVIEW Pro 2012 SP1 32bit
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5. PXIe-8135
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I made VI (test.vi), but it does not work.
Could you tell me the reason why my VI doesn't work correctly.
Thank you so much for your help and time.
Best Regards,
volcanon2
Attachments:
test.vi ‏28 KB

activeX

How to install a pci-6030e in a pxie-8102 chassis

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Hello Grandmaster_P!
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Using PXI-6682(H) in PXI Express chassis to replace backplane clock

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