6608 80 MHz timebase

[Timothy_Wright]

I have a PXI system with a 6608 timer device in slot 2 and a 5122 digitizer in slot 3.  I know that the 6608 has an internal 80 MHz timebase, and I would like to use this timebase as a clock source for the 5122 using LabVIEW.  I would prefer to route the timebase internally through the PXI backplane or a RTSI line, but would accept routing the timebase to something like PFI 0 and wiring it externally to the digitizer CLK IN.  I have not been able to learn how to route the timer's 80 MHz timebase to another line that the digitizer can use for a clock source, and I have not learned how to use any digitizer external clock source but CLK IN and PXI Star.  Any help would be appreciated in learning any of these things.
This has also been posted to the LabVIEW board, I'm posting here to cover my bases.

[NatasaLingurovska]

Hi Tim,

The 5122 digitizer can be synchronized with external sample clock only if this clock is routed on the CLK IN (front panel SMB connector) or the PXI_Star_Trigger of the card. In your scenario, it would be easiest to export the 80MHz timebase from the 6608 to the PXI_Star_Trigger line and then specify that the clock source for the 5122 is the PXI_Star_Trigger. Use the Daqmx_Connect_Terminals.vi to export the 80MHz timebase to the PXI_Star_Trigger line on the 5122. On the digitizer side, you will have to use a property node in order to specify the source clock. Please see the jpg attached below.

I hope this helps.

 

[Timothy_Wright]

Hi Natasa,

Sorry this is rather belated, but thank you for your help with this problem.  We've just completed that phase of our project and thankfully nothing blew up.

Cheers,

Tim