In Reply to: making freq. response graph posted by Chris R on June 30, 2003 at 18:58:39:
If you have a signal generator and scope, simply use a series of frequency points and measure the input and output voltages. This will allow you to plot a graph, which you can calibrate in linear voltage or in decibels. You'll probably want to scale with decibels, so convert voltage to decibels using the formula dB = 20log(Vout/Vin).
Follow Ups: