LappartResto Recreation Digital Oscilloscope Basics

Digital Oscilloscope Basics

A digital oscilloscope converts analog input signals into digitized information that can be stored and analyzed. These data are compared to other measured values such as time and frequency for a complete picture of the waveform being analyzed. The result of this digital comparison is automatically displayed on the screen along with a variety of measurements such as frequency, rise time, and voltage deviation.

Digital storage oscilloscopes can be used in both single-shot mode (where only one signal is acquired) or in repetitive modes where multiple signals are sampled and stored continuously. To determine which type of scope is best for your application it is important to consider the number of channels you will need, how long a record length do you require and what is the maximum sample rate?

Seeing Signals: A Guide to Choosing the Right Digital Oscilloscope

The sample rate of a digital storage oscilloscope is the maximum number of samples per second that the oscilloscope can capture. Higher sample rates allow the oscilloscope to capture faster signals without losing details of the original waveform. A higher sample rate also allows for better detection of intermittent events such as a single-shot trigger.

In real-time sampling mode, the oscilloscope captures a set number of samples over the time period defined by the time base setting. Then the oscilloscope uses interpolation to fill in the gaps between samples. Linear interpolation is limited to reconstructing straight-edged signals, while sin x/y interpolation allows for better reconstruction of complex shapes.

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