Oscilloscope Bandwidth Calculator
Find out how much bandwidth you really need.
Bandwidth Calculator
Enter your signal frequency to find the minimum oscilloscope bandwidth you need.
MHz
The 5x Bandwidth Rule
Your oscilloscope bandwidth should be at least 5 times the highest frequency component of your signal. A 50MHz scope can accurately display signals up to about 10MHz. Below this ratio, the scope attenuates the signal and you lose accuracy on rise times and amplitude measurements.
This is a rule of thumb for digital signals. For sine waves, 3x is often sufficient. For signals with fast edges (like SPI clocks), 5x or higher is recommended.