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sound card highest freq?

Discussion in 'Electronic Design' started by amdx, Jul 28, 2003.

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  1. amdx

    amdx Guest

    Is there a sound card available that will generate a frequency as high as
    500 Khz?

  2. Ben Bradley

    Ben Bradley Guest

    No, not a 'sound card' - even the most high-end 'professional'
    cards run at 196ksps and will only reproduce 90kHz or so. Perhaps
    National Instruments or a similar company makes some instrumentation
    interface that will output a digitized signal through a D/A at 1msps,
    which is what you would need to generate 500kHz.
    The highest sample rate of most common soundcards is 48ksps (the
    standard for DAT), which means the max frequency it could generate
    would be just under half that, or maybe 22kHz.
  3. steve

    steve Guest

    You might be able to remove the reconstruction low pass filter from the
    DAC output and replace it with a band pass centered around the region of
    interest. Sin(x)/x will roll off the amplitude of the resulting signal,
    but you may be able to get what you want....

  4. Rob Judd

    Rob Judd Guest

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