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PXIe-6674T OCXO to PXI_CLK10_In Issues

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Hello,

 

Currently I have a PXIe-1082 chassis, PXIe-8101 controller and a PXIe-6674T timing card installed in slot 4. What I want to do is connect the oscillator on the timing card to clk10_in to improve the accuracy of the 10MHz reference clock.

 

So here's the weird thing, for the most part when I run my labview program it fails to connect saying "PXI_Clk10_In is available as a destination terminal only for devices in a system timing slot. Move your device to a system timing slot." and will give the error code -1074118597. When it fails I try running the example code to connect to PXI_Clk10_In and using MAX and it will give me the same error, but every so often it will work without giving a single error.

 

Every time I power up the chassis the first thing I do is check to see if I can connect the clock, and if I can it gives no problems, but if I can't it seems like nothing I do will fix it and it will remain so for periods of time spanning a few weeks to a few months. When it does work, the longest it has lasted has been a week.

 

I was wondering if anyone has run into anything like this before or has any suggestions on how to get it to work consistently?

 

Also whether I can connect to PXI_Clk10_In or not I'm able to divide the DDS and output it to ClkOut so it's not a complete failure of the module just of the ability to connect to Clk10_In.


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