PLL with the Ni 5411 Arb and PXI Star

Question

I am trying to PLL the NI 5411 Arb with the PXI Star, but I have found no documentation indicating how to do it and it does not appear to happen automatically like some other devices. I currently have a 6608 timing card in the PXI Star Slot.

Answer 1

The PXI-5411 is capable of Phase-Lock Looping with the 10MHz Backplane clock and is capable of receiving a trigger signal from the PXI Star Trigger line. However, the PXI-5411 is not capable of driving the PXI Star Trigger.
For more information abotu how the PXI-5411 uses the PXI Trigger Lines, see the "RTSI/PXI Trigger Lines" part of "Chapter 2 - Arb Operation" in the User Manual of the board (linkes below).
NI 5411 User Manual
The Example program attached below (written under LabVIEW 6.1) shows how to synchronize two NI 5411 boards by first Phase-Lock Looping (PLL) their internal clocks with the 10MHz Backplane Clock provided by the chassis, and then sending a trigger line from one 5411 (the master board) to the other (the slave board).
If you want to receive the PXI Star Trigger as the Star Trigger, you will need to use a PXI board capable of sending a signal to this pin. The only NI PXI boards capable of sending a digital trigger pulse over the PXI Star Trigger line are the PXI-5112 (High Speed Digitizer) and the PXI-7344 (Motion).
The PXI-6608 board is not capable of driving the PXI Star Trigger line, however, if you install the PXI-6608 board in slot 2 of the PXI chassis, it will override the 10MHz clock signal provide by the PXI chassis, with the onboard OCXO 10MHz signal provided by the board itself. The PXI-6608 provides a 75 ppb accuracy 10MHz clock, that replaces the aproximately 50 ppm accuracy 10MHz clock provided by the PXI chassis. By overriding the 10MHz clock with a better accuracy one, the PXI-5411 boards will do PLL using a better reference clock.
The only device that PLL automatically with the 10MHz backplane clock are the PXI-6115 Simultaneous Sampling boards.
See related links for more information.
Hope this helps,
Claudia Lorente
Applications Engineer
National Instruments
http://www.ni.com/ask
Knowledge Base 2S2BFCQ7 : PXI Devices That Can Send and Receive Star Triggers
About Your 6608 Device
Knowledge Base 2NFGGQAL : OCXO Stability On The PXI-6608 Counter/Timer
Knowledge Base 2CCF38PQ : Accuracy Problems when I Drive the PXI Backplane Clock with a PXI-6608
Attachments:
5411_Synchronize_Generation.vi ‏229 KB