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How much bandwidth does your oscilloscope really need? Learn how to choose the correct bandwidth oscilloscope for your application. Choose a country or area to see content specific to your location
Bandwidth. Bandwidth determines an oscilloscope's fundamental ability to measure a signal. As signal frequency increases, the capability of an oscope to accurately display the signal decreases. The bandwidth specification indicates the frequency range that the oscilloscope can accurately measure.
24 paź 2017 · Oscilloscope bandwidth is defined as the frequency at which the amplitude of the observed signal drops by -3 dB (or drops to 70.7% of its actual value) as we increase the test signal’s frequency as plotted on the amplitude-frequency characteristic curve (Figure 1).
Whether your scope has a Gaussian response, maximally-flat response, or somewhere in between, the lowest frequency at which the input signal is attenuated by 3 dB is considered the scope’s bandwidth. Oscilloscope bandwidth and frequency response can be tested with a swept frequency using a sine wave signal generator.
Determine the minimum bandwidth of an oscilloscope (assume Gaussian frequency response) to measure signals that have rise times as fast as 500 ps (10-90%): f knee (10-90%)= (0.5/RT) = (0.5/0.5 ns) = 1 GHz 20% Accuracy: BW = 1.0 x f knee = 1.0 x 1 GHz = 1.0 GHz 3% Accuracy: BW = 1.9 x f knee = 1.9 x 1 GHz = 1.9 GHz
This video provides a technical introduction to oscilloscope bandwidth, including how bandwidth is specified, why bandwidth is important, and how to determin...
26 cze 2024 · To calculate oscilloscope bandwidth using the 3 dB rule, follow these steps: 1. Determine the Rise Time: Measure the rise time (tr) of the oscilloscope, which is the time it takes for the signal to transition from 10% to 90% of its peak value. 2. Use the Formula: Calculate the bandwidth (BW) using the formula: BW = 0.35 / tr. 3.
