Can't replace PXI onboard clock with PXI-6682 oscillator clock on PXI back plane

Question

I have installed a PXI-6682 timing module in slot 2 of a PXI-1031chassis with a PXI-8110 controller running Hypervisor and RT.  The 6682 is installed on the RT system under Hypervisor for GPS timing during measurements but I would like to put the TCXO on the PXI-1031 chassis backplane (replacing the PXI onboard clock).  When I try to run the "Route Clock.vi" that I found in the example finder, all I get are error messages indicating that a parameter for this operation is invalid.  The source terminal is "Oscillator" and the destination terminal is "PXI-Clk10_In".  How do I determine which parameter is invalid?  Any suggestions?  Thanks
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Answer 1

Hi vugt,
I tested this out and have what I believe to be your final answer.
The short answer:  The PXI-6682 can be used with NI-Hypervisor on the Windows side, but not on the Real-Time side.
The long answer:
While the NI-Hypervisor Manager allow you to put the PXI-6682 on two different systems, it is still only one PXI card on the PCI bus, so really only one system can access it at a time.
Therefore we need to assign both "devices" to either Windows or Real-Time.  For our purposes, let's assume we assign it to Real-Time.
On an NI-Hypervisor system, each PCI interrupt line can only be assigned to one operating system.  Either it can be assigned to Windows, or it can be assigned to RT.
Here is where the problem arises: The PXI-6682 needs to be located in a System Timing slot (generally slot 2).  However, this slot (at least in the 1000B chassis I tested in) is located on the same PCI interrupt line as the chipset.  Windows is required to have access to this PCI interrupt line, so devices used by Real-Time cannot be located on this interrupt line.
This prevents us from being able to use the PXI-6682 in Real-Time.
The NI-Hypervisor Manager will try to tell you to resolve this conflict by moving the PXI-6682 to slot 3, however, now the System Timing slot requirement is not met.
This does not prevent the card from being used on the Windows side of an NI-Hypervisor system, or on a purely Real-Time system.
Have a great day,
Chris V
Applications Engineer
National Instruments