Timing different C series modules under FPGA

[vcb]

Hello,

After I tried different programming techniques to manage synchronization of different C modules I trying to synchronize them using same clock.

I have

9237 (that exports its onboard clock)

9203

9201

mounted in cRIO-9075

How can I synchronize all these modules? I use different frequencies for all of them.

Is it possible it time the 9237 from FPGA clock?

Thank you,

Przemek

[Zody]

Hello,

Your system has two types of modules:

NI 9201 and 9203 have a SAR A/D convertor but 9237 has a delta-sigma A/D convertor, therefore, 9201 and 9203 can accept any sampling rate within the technical specification of the modules, but the 9237 can accept only specific ones that is a derivied fom a master time base clock. In the manual of 9237 you can find the formula by wich is calculated.

I've attached a printscreen of the FPGA vi that will allow you to synchronize the modules. You specify the samplin rate of the 9237, let's say to 50 KS/S and you add the three channels in the same node read on FPGA, this will assure that they are synchronized with 50KS/s sampling rate.

Kind regards,

Ion R.

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