How do I synchronize multiple 653X devices in DAQmx? Hardware: Digital I/O (DIO)>>High-Speed>>PCI-6533
Problem: I have multiple 653X devices in my PC and I need to synchronize them with an shared clock. Solution: The help for the 653X devices with DAQmx states: The NI 6533/6534 requires a clock to run the handshaking logic and to generate sampling intervals for Sample clock timing. The frequency timebase must be 20 MHz. Whether internal or external, the 20 MHz clock serves as the primary frequency source for the NI 6533/6534. The NI 6533/6534 uses its internal 20 MHz clock source, by default, or you can provide a clock from another 20 MHz source over the RTSI bus. When using its internal 20 MHz clock, the NI 6533/6534 can also drive its internal timebase onto the bus to another device that uses a 20 MHz clock. To programmatically change the source of the clock, use the master timebase source/rate timing properties/attributes in NI-DAQmx.
Related Links: KnowledgeBase KB 3LDGM4S9: Connecting Two NI 653x Boards KnowledgeBase KB 3DJCK9FL: Are NI 653X Series High Speed Digital I/O Devices Supported in NI-DAQmx? KnowledgeBase KB 3ILEGNPK: How Can I Synchronize REQ1 and REQ2 for Pattern I/O on 653x Devices? KnowledgeBase KB 3FCKIOQ8: Can I Use Multiple External Clocks With My 653x Device? KnowledgeBase KB 2WOGJRY1: How Can I Synchronize My PCI-6071E With My PCI-653x? Attachments:
Report Date: 02/14/2007 Last Updated: 02/15/2007 Document ID: 46D92BA0 |
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