Keysight Technologies InfiniiVision 3000A X Series, 200 MHz Bench Oscilloscope 4-Channel

Zoom in on your system's electronic signals with this oscilloscope from Keysight Technologies. Its sampling rate of 4000 samples per second means it takes multiple readings in the blink of an eye, so you can trust it plots a precise waveform every time. As its onboard memory holds up to two million data points, the device keeps a long test record to take the hassle out of tracking trends. Four analogue channels mean it's equipped to monitor many circuits at once. Thanks to the instrument's built-in USB connectivity, saving test data to your external drive for future review is a cinch.

• Display size of 8.5in for ease of reading

• Electronics engineering

You should select a unit with a bandwidth rating of around three to four times higher than your signal frequency. This ensures that you get precise waveforms while cutting back on excessive electrical noise.

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