Hi Ramkumar,
Our PXI chassis have PLL capabilities. Are you talking about implementing PLL to the PXI backplane? There are modules that can do that. The 6653 allows multiple chassis to be synchronized together. However, if you want to implement your own PLL with software on one of our boards, you can create a VI that does a PLL based on input/output channels. Check out the following examples for that:
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=BDBD4DAD5A86204DE034080020E74861&p_node=DZ53027
Another solution would be to try to implement the above example in our of our RIO (FPGA) devices, such the PXI-7831R or PXI-7811R. Can you please explain in more detail your application and exactly what are you seeking to implement.
A Saha
Applications Engineer
National Instruments
Anu Saha
Academic Product Marketing Engineer
National Instruments