Re : analog trigger pxi-5600

[rvpsa]

Dear all,

I'm using a PXI-5600 to recieve one RF signal and then CVI to decode it.

I would like this PXI to trig on a specific analog voltage, but it seems that all the trigger configuration this card can accept is "immediate trigger" (using niscope_ConfigureTriggerImmediate function).

When I try to set an analog trigger (using niscope_ConfigureTriggerHysteresis) I obtain the run time error 0xbffa0010 ("Invalid value for parameter or property").

Does anyone know if analog hysteresis trigger is possible for this card ? And, if possible, how to trig ?

Thank you very much.

Best regards from France,

Herve

[ElRambo]

Hi,

Can you tell me what is paired with your PXI-5600 card ? Why do you use NI SCOPE instead of NI RFSA ?

Regards,

[rvpsa]

Hello and Thanx for your reply.

Yes, of course I can : it's the PXI-5620 card.

In fact, I haven't found any analog level trigger function within RFSA library.

All I've found is :

    Component : National Instruments Tuner

    Class : Synchronization

    Function : ConfigAdvanceTrigger, with trigger sources : software or RTSI0 to RTSI6. No AnalogTrigger.

And as this card executes several ni_scope functions, I've tried to use its analog trigger function. Without success.

But I still hope that these cards can realize analog trigger...

Best Regards.

Herve

[ElRambo]

Hello,

In fact with the PXI-5600 there is no trigger function available, why don't you use your PXI-5620 to trigger ?

Regards,

[ElRambo]

Hello,

I had some discussions with colleagues and apparently when a PXI-5600 is paired with a PXI-5620 like you said, it is possible to triger and this actually use NI SCOPE functions what I ignored.

I advise you to have a look at this forum PXI-5660 / 5620. What is lowest reasonable voltage when using Analog Edge Trig? . I'm looking closely at the NI SCOPE documentation to provide you an answer as soon as possible.

On your side, did you manage to trigger with the functions you gave me ?

Regards,

[rvpsa]

Dear Maxime,

Thank you very much for your reply. I've been busy on another problem for a few weeks, and I'm now back to try to solve this first one.

So, I've taken a look at the forum, but it seems that only LabView is concerned there.

But I'm working with LabWindows CVI and I haven't found any function that would realize an analog trigger.

In this forum, analog trigger was already realized using a special .vi but the problem was the trigger level which could not go below a value.

My problem is that the only NiScope analog trigger function I've found and tried to use always returns "function not supported by this device" error.

Do you think that analog trigger could be available for LabView and not for LabWindows CVI ?

I go on searching help and trying functions...

Thanks for your help if you can.

Best regards

Hervé

[ElRambo]

Hello,

I have been searching for some triggering functions you could use, and I found niScope_ConfigureTriggerWindow which is pretty similar to niScope_ConfigureTriggerHysteresis, you can find the C prototype here : niScope_ConfigureTriggerWindow .

Let me know if this helps !

As for me I will re-contact the R & D about this issue.

Have a nice day,

Message Edité par Maxime MULLER le 08-07-2008 08:11 AM

[rvpsa]

Hi

Thank you for your answer.

As you've suggested, I've tried to use niScopeConfigureTriggerWindow function, but I've obtained the same result : an error.

In fact, the error is "invalid value for parameter or property" (0xbffa0010).

For instance, when I try to use niScope_ConfigureTriggerDigital with PFIx as trigger source, no error is returned and the software runs correctly (waits for digital trigger to occur).

When I use niScope_ConfigureTriggerImmediate I obtain the same result, the software does its job correctly : it starts acquiring as soon as niScope_InitiateAcquisition function is called.

But when I try to use an analog trigger, the result is nothing but non-fatal run-time errors.

In NI_tuner functions, the only trigger function I've found is "niTuner_ConfigureAdvanceTrigger", but the only signal sources available are "software trigger" or RTSI (0 to 6) triggers.

I'm still searching for new ideas, and waiting for anyone's help.

Thank you.

Hervé

[ElRambo]

Hi Hervé,

Thanks for these informations, I am contacting R & D right now about your issue.

Can you tell what versions of NI Scope and NI Rfsa are you running ?

Have a nice day !

Regards,

[rvpsa]

Dear Maxime,

Here are software versions :

NI-SCOPE : 3.0.0f4

NI-FRSA : 1.5.0

Thank you very much for your help.

Best Regards,

Hervé