RF Filter Passband Measurement with a Noise Source (How To)

In this video, I demonstrate how to use a noise source to characterize the passband behavior of an RF or microwave filter using an FFT spectrum analyzer or oscilloscope-without the need for a tracking generator. By injecting broadband noise into the filter and observing the output on the spectrum analyzer, you can effectively visualize the filter's frequency response, including its bandwidth, center frequency, and roll-off characteristics. This method offers a simple and cost-effective alternative to using more complex equipment, making it especially useful for hobbyists, students, or engineers working with limited lab tools. I also cover practical tips on setting up the measurement, choosing an appropriate noise source, and interpreting the resulting spectrum to gain meaningful insights into the filter's performance. #electricalengineering #electronics #maker