PCSGU250 How to read the peaks of spectum analyzer

Instruments PC Oscilloscopes and Recorders
1

I do not know how to read this diagram.

Parameters
FFT window: Hamming
FFT option: Maximum
Freq. range: 120 Hz

The signal is a pre amplified sound of a on ground placed microphone.

On which freq. I have to associate the peaks? What indicates this view?

Martin

2

There seems to be peaks at about 35Hz, 49Hz and 50Hz.
There seems to be also some noise at low frequency around 15Hz.
You may either use the markers (select View -> Markers FFT), or you can use File -> Save FFT Data.
You can then open the file in any text editor to check the detailed spectrum data.

3

Thank You! There was no word about the marking option in the manual.

The scale means 10 Hz per scale. OK!

Martin