Is it possible to achieve 10 MHz output transfer rate on 6534 device?

I want to achieve 10 MHz output transfer rate on 6534 device. I need to contunuously generate non-repeating data. But when I execute the CVI sample program DOdoubleBufPatternGen653x, I cannot exceed the 1 MHz transfer rate (iPgTB = -3, iReqInt = 20), I get a -10843 error. Parameter oldDataStop is set to 1. Each halfbuffer contains 100000 points, buffer - 200000. My system is Pentium IV 2GHz, 512 MB RAM. What should I change to achieve 10 MHz transfer rate? Is it possible in this mode?

Greetings Alexey,
It should be possible, but it may take some extra thought and effort on your part due to the limitations and/or use case of your system. I would first recommend that you see the NI Tutorial "Maximizing the Performance of the NI 6534 Digital I/O Device" available online at . Based upon the error you are getting, it sound like you are not getting sufficient PCI bus bandwidth. Are you perhaps reading this data from disk (that would roughly double the PCI bus bandwidth required, or halve the transfer rate that you can expect to achieve) or using other PCI devices that are contending for bandwidth (potentially video cards, sound cards, network cards, dr
ive controllers...)? Some of these PCI devices need substantial bandwidth, others will grab the bus periodically for small transfers (sound cards, seemingly unused network cards forwarding broadcast packets...), and these could potentially interfere with your ability to stream data continuously at high rates. You might try disabling unused devices in your device manager. If you continue to have difficulties, please forward us more details about your system, what it is doing, and how your program works (are you streaming data from disk, network, or are you generating it on the fly).
Sincerely,
Jeremiah Cox
Platform Software Product Support Engineer
National Instruments
>

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