Sample Rate And Bandwidth

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kormesii

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Hi,
I have just look at the specification of Instek' DSO : GDS-840C
https://www.testequipmentdepot.com/instek/pdf/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 ?
 

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.
 

    kormesii

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