synchronized generation at 30 MHz

[gcg]

Hi!

 I would like to generate data from my PXI-6541 at a rate of 30 MHz. This data is not synchronized with my device at 30 MHz, how can I set up a reference  clock or something to synchronize these two devices??

Thanks 

[John_P1]

Hi gcg,

What is the device that you are using with the 6541?  Do you have a 30 MHz clock to use from this device?  One problem is that the 6541 uses a divide down from a 200 MHz timebase, so you can't hit exactly 30 MHz from its on-board clock (33.333 MHz or 28.571 MHz would be 200/6 and 200/7 respectively).  Providing a reference clock to the 6541 would not help with this limitation.

If you want the data to be clocked out at exactly 30 MHz, you will need to provide the 30 MHz clock to the 6541.  For a generation task, you can use either the CLK_IN SMB connector or the PXI_STAR line on your PXI chassis (of course, you would need a module in your timing and synchronization slot of your PXI chassis that is capable of driving the PXI_STAR line if you want to use the backplane).

I hope this helps, if you let us know more details we might be able to give more advice for your application.

Best Regards,

[Keith.Shapiro]

Also, you can export a source synchronous generation clock from the 6541 to your DUT.  Use the niHSDIO Export Signal.vi to export "Sample Clock" to "DDC CLK OUT".

Keith Shapiro

National Instruments R&D