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Dual-channel oscilloscope | Dso Oscilloscopes Handheld | Dso Digital Oscilloscope - Oscilloscopes - Aliexpress
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Digital Oscilloscope with 2 Channels 120Mhz Bandwidth Signal Generator 500MSa/s Sampling Rate, 2.8" LCD Backlight Display, Waveforms Storage, 3 Scan Modes, XY/YT/Roll, FFT Spectrum, Single Trigger: Amazon.com: Industrial & Scientific
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2 channel roll mode oscilloscope measurement of LED protected by a resistor and switch circuit - YouTube
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