How Do I Use External Clocking With My PCI-5411?Hardware: Signal Sources (AWG/FG/AO)>>Arbitrary Waveform and Function Generators
Problem: I want to synchronize my NI 5411 with another device. Can the NI 5411 accept an external clock? Can I use the "PLL in" connector on the front plate of the NI 5411? Solution: Only the PXI 5411 devices support external clocking. If you have a PCI based NI-5411 you won't be able to use an external clock and will need to synchronize the clock by using the Phase Lock Looping (PLL). You can use the PLL connector to synchronize the clock signal to the board but the signal you drive to the board via PLL connector will be a Phase-Lock Loop signal and that means that the board will still be using the update clock of the board. The signals you connect to the PLL ref connector must have a frequency of 1 MHz or 5-20MHz in 1 MHz increments. So you can't simply drive any clock to the PLL. The PLL will guarantee that the Master clock of the boards are synchronized but you still use the divide down counter of the board to define the update frequency. With the PXI boards you can do External Clocking, you can connect your signal to the PLL and the board will update at the frequency of your signal. Related Links: Attachments:
Report Date: 01/09/2002 Last Updated: 01/29/2007 Document ID: 2H8EQN0A |
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