User Manual

Spectrum Analysis
R&S
®
Scope Rider RTH
126User Manual 1326.1578.02 ─ 08
2. Select "Harmonic".
An FFT is performed on the input signal, and the power level at the fundamental
and all harmonic frequencies of the signal (that is: all multiples of the fundamental
frequency) are analyzed.
5.3.2 Harmonic Measurement Results and Display
As the result of a harmonic measurement, a bargraph is displayed, with one bar for
each of 64 possible harmonic frequencies. The amplitudes determined for each har-
monic are indicated by a colored bar. The results for each active input channel are dis-
played in a different color. The values are scaled in dB or percent, in relation to the
level at the fundamental frequency. If a limit is defined, either manually or predefined
by a standard, the limit is indicated by a blue horizontal line for each harmonic. If the
measured value exceeds the limit, the background is highlighted red. The darker col-
ored bar indicates the maximum value measured for the harmonic.
9
8
7
6
5
4
3
2
1
11 13 14 15
10
12
Figure 5-4: Harmonic results and display
Harmonics Measurement (Option R&S RTH-K34)