Electronics > Beginners
oscilloscope display explanation wanted
txx4488:
Can someone explain me how does a high speed signal is displayed in low refresh rate of LCD in modern oscilloscope ?
ataradov:
The signal is captured in the memory and then shown on the display. There are gaps between captures. That's why you get a characteristic like waveforms/second.
xrunner:
--- Quote from: txx4488 on December 12, 2018, 01:45:22 am ---Can someone explain me how does a high speed signal is displayed in low refresh rate of LCD in modern oscilloscope ?
--- End quote ---
Not quite sure exactly what you mean, but if it's set to trigger on the "high speed" signal, it's just going to display a snapshot on the screen. All the processing makes this possible given a certain bandwidth specification of the scope. If it's not triggered and the horizontal time/div is not set right, then it will look like a mess.
Maybe if that is not the answer you are looking for someone else will be along to assist you better. :)
Edit: Oh Ataradov got to it first.
txx4488:
So what might be the time delay between signal captured and signal displayed on lcd ?
ataradov:
--- Quote from: txx4488 on December 12, 2018, 02:02:43 am ---So what might be the time delay between signal captured and signal displayed on lcd ?
--- End quote ---
Much faster than your eyes reaction time. But it also depends on your time scale. You can set 10 sec/div and see the signal with your eyes in real time.
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