How to detect Noise in a Signal using Oscilloscope?
Say I have a noise free square wave signal of 1 khz frequency and 5 v amplitude. The signal passes through some optical receiver and the shape of the signal becomes slightly distorted with some noise in it. I have a digital oscilloscope that has FFT. How can I use this FFT to detect the frequency of the noise so that I can separate the noise from the signal. I don’t want to go through complex maths. Just tell me how to use the oscilloscope FFT function in determining the noise. Any help would be highly appreciated. Thanks in advance. [ This Message was edited by: IndiJones on 2001-10-05 05:43 ] Reply With Quote View Profile 05-10-01 14:09 #2 borut Member level 1 Achievements: Join Date Sep 2001 Posts 36 Helped 0 / 0 Points 1,870 Level 10 This is very easy, you set the time-base in the mode that you see the noise so you have to “speed-up” the time-base and in this way you may “read” the frequency of the noise signal. If the noise is constructed with many different f
