I need to measure the oscillation modes of a metallic box. The setup is as follows: A function generator is connected to an amplifier, which is connected to a piezoelectric that acts as a sound emmiter. Another piezo is connected as a sound receiver, and this is connected to PicoScope 4227. The signal is displayed correctly in PicoScope 6 in Windows. However, I need to make a frequency sweep and, for each value of the frequency (which I change manually from the function generator), save the average amplitude. Hence, I need a text file with one column as the frequency and another column as the amplitude, I do not need to save the whole waveform.
How can I do it?
Any help would be appreciated.