clock share between digital and analog

[hosa]

Hello,

I want to make a synchronized detection. The detector output is analog and is acquired by a MIO. The subject is controlled digitally with DIO. I have a PXI with DIO and MIO devices. My question is that, if I could synchronize the clock between DIO and MIO devices which are digital and analog, respectively. 

Thank you

[hosa]

Or, let me ask a better question first. Is the bus speed of PXI system, 10 MHz, is the speed limit of operation?

[Kira_T]

Hey hosa,

What PXI system DIO and MIO devices are you using?  

Regards,

Kira T 

[hosa]

Hi,

It is a NI PXI 6508 for DIO and a NI PXI 7030/6040E for MIO.

Thanks

[Kira_T]

Hey hosa,

I still need a little bit more information from you.  What do you mean by clock sharing? How do you plan to program this, are you using LabVIEW or LabVIEW Real-Time?  Are you using DAQmx?  Thanks!

Kira T

[hosa]

Hi,

I am trying to find that if the two modules can share a same clock. I don't know if this is possible or not. This is needed for a synchronized measurement. And for a fast measurement, I need to trust the modules output data. So, the base for my decision would be the clock. For example, if I want to be sure that output # 100 (in time reference) of detector corresponds to output # 100 of piezo controller, I think that the clock must be shared between the detector and controller.

And Yes. I am going to use DAQmx. I have LV RT, too.

Before start, I need to know that if this clock share is possible or necessary. I mean that, should I trust on the bus? or there is a need to somehow share the clocks.

Thanks,

hosa

[Kira_T]

Hey hosa,

It is possible to share clocks among your PXI cards.  You could either have the cards share the clock of the back plane or share the clock of either one of the cards.  Which one you choose depends on your requirements for the time base and stability.  What chassis are you using?  Do you already have a RealTime application running on the 7030?

Kira T

[hosa]

Thank you Kira.

That would be the exact thing I am after. Sharing clock from one of the cards. I am using PXI 1000B. And I have not any real time application on 7030.

hosa