A digital oscilloscope is the most commonly used type of oscilloscope for adjusting electronic circuits. Digital oscilloscopes acquire and store waveforms, which show a signal’s voltage, frequency, the portion of the signal that is noise, whether the signal is distorted, the timing between signals and more.

An oscilloscope and a multimeter are both useful tools for testing and troubleshooting electronic circuits. However, they have different purposes and strengths. A multimeter is a tool for making precise measurements of discrete signals, enabling readings of up to eight digits of resolution for the voltage, current, or resistance of a signal. On the other hand, an oscilloscope is designed to visually depict waveforms to show signal strength, wave shape, and the value of a signal.

The required bandwidth of an oscilloscope depends on the highest frequency component of the measured signal. A general rule of thumb is to use the “five times rule” to determine the required bandwidth of an oscilloscope. For example, if you want to measure a 12 MHz signal, you need an oscilloscope with at least 60 MHz bandwidth.

It’s important to note that the bandwidth is not the only factor to consider when choosing an oscilloscope. The sample rate, number of channels, and type of probes are also important factors to consider.