How To output the PXI-6608 OCXO to PXI_CLK10_IN

[Hezapeter]

Hi!

I am trying to make high accuracy measurements with the PXI-6608.

I am using a 3rd party PXI backplane which has no StarTrigger slot that would override the PXI_CLK10 automatically with the PXI-6608 OCXO output PXI_CLK10_IN.

It appears that the PXI-6608's OCXO has no direct link to the time source of the counters but that instead the time source can "only" be PLL-synced to PXI_CLK10 signal of the backplane. Is this correct?

I tried to measure the high accuracy OCXO output on PXI_CLK10_IN but got nothing. What needs to have the PXI-6608 output its OCXO clock to PXI_CLK10_IN?

ThanXs for your help, Hezapeter

[crossrulz]

By connecting the OCXO to the PXI_CLK10_IN, you are overriding the PXI clock to make a more accurate reference clock.  So anything that is using the PXI clock at a reference will become more accurate.  I believe you have to set the source reference clock for the DAQmx tasks to the PXI clock in order to get this benefit.

But here's how you connect the OCXO to the PXI clock.