I have two NI 4472 DSA cards synced with each other and am using Labview. Is it possible to run the cards at different scan rates.1st DSA at 30Ks,2nd DSA for display only 2Ks.

[Captainz]

I would like to run the first card from 15Ks to 50Ks per all eight channels.
On the second card I would like to set it�s scan rate on all eight channels from
2Ks to 4Ks. The second card is for display only.

[Gerald Albertini]

It is not possible to run multiple 4472's at different sampling rates when these boards are synchronized.
If you're using a PXI system, the 4472 located in slot 2 will generate the clock (actually, an "oversampling" clock since Delta Sigma converters are used) and will export it to the appropriate PXI_STAR lines so that other 4472's may use it.
As of today, there is no divider on the 4472 that would allow you to divide the sampling frequency so that multiple boards are still synchronized but running at different sampling frequencies.

If your second board is for display only, you may want to decimate the result before displaying it or display only one block of data out of n.
That will not decrease the memory usage needed by the acquisition but wi
ll release some CPU load.

I hope this helps

Gerald Albertini

[Annette Perez]

Hello,

I definitely agree with Gerald. There is a pretty good Knowledge Base that talks about this in detail. Here is the link: How Do I Synchronize Multiple NI 4472 DSA Devices for PXI?

Keep up the good work!

Annette.

[TWago]

No problem,

Thanks anyway for the help!