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  1. #1
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    Sample Rate And Bandwidth

    Hi,
    I have just look at the specification of Instek' DSO : GDS-840C
    http://www.testequipmentdepot.com/in...GDS-820840.pdf
    The BandWidth is 250 MHz, but the Real-Time Sample Rate is maximum 100 Ms/s
    on each channel !!! Is that mean that I can measure nonperiodic input signal with 250 Mhz ( single-shot ) ? Any ideas how they do it ?

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  2. #2
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    Sample Rate And Bandwidth

    I doubt it. If the ADC runs at 100 MHz, then a single-shot input signal near or above 50 MHz will look like garbage. To measure higher frequencies, the scope needs a repetitive input signal. Enable equivalent-time sampling mode so it can build up the waveform by sampling many waveform cycles.


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