CEMB USA N500 - Manual (Page 37)

FFT analyzer mode 6 - 5
Harmonic cursor
When the cursor is displayed on an FFT graph (see. 2-6 Use of the cursor), it means that
a special mode known as harmonic cursor is available.
The frequency at which the cursor is currently positioned when
is pressed, is
considered as the fundamental frequency of the signal under examination, and on the graph
all the harmonics of higher order (2nd, 3rd, 4th, …) are marked
Shifting of the cursor, which varies the frequency considered as fundamental, causes the
automatic updating of the position of all the multiple ones.
Use of the harmonic cursor allows easy recognition in the spectrum of families of peaks in
correspondence of frequencies, which are multiples between each other, and typically
indicative of special defects (see Appendix C).