![Rohde & Schwarz 1321.0615.02 User Manual Download Page 155](http://html1.mh-extra.com/html/rohde-and-schwarz/1321-0615-02/1321-0615-02_user-manual_1477771155.webp)
Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
148
User Manual 1321.1011.02 ─ 11
6.1.7
Measuring the Harmonic Distortion
The Harmonic Distortion measurement is an easy way to identify the harmonics of a
DUT. In addition to the graphic display of the harmonics, this measurement mode also
calculates the Total Harmonic Distortion (THD) and shows the results.
You can perform a Harmonic Distortion measurement in frequency sweep (span > 0)
and zero span mode (span = 0). When starting the measurement, the R&S Spectrum
Rider looks for the first harmonic of the signal (= the highest signal) in the defined fre-
quency range. It then adjusts the frequency axis so that all harmonics are visible. In
zero span mode, the center frequency remains the same.
1. Press [MEAS] key.
2. Select "Meas Mode" softkey.
The R&S Spectrum Rider opens a submenu to select the measurement mode.
3. Select the "Harmonic Distortion" menu item.
The R&S Spectrum Rider starts to measure the harmonic distortion.
The search for harmonics starts as soon as you enter the Harmonic Distortion mea-
surement. Upon entering the measurement, the R&S Spectrum Rider automatically
adjusts the settings in order to display the selected number of harmonics (default = 2)
on the screen.
Figure 6-6: Screen layout for the harmonic distortion measurement
1 = Harmonics measurement mode
2 = Harmonics list
3 = Total harmonics distortion in %
4 = Total harmonics distortion in dB
5 =
6 =
Performing Spectrum Measurements
www.allice.de
Allice Messtechnik GmbH