User Manual

Spectrum Analysis
R&S
®
Scope Rider RTH
132User Manual 1326.1578.02 ─ 08
"THD
F
"
The RMS amplitude (voltage or current) of the harmonics relative to
the RMS amplitude of the fundamental component
"THD
R
"
The RMS amplitude of the harmonics relative to the RMS amplitude
of the input signal
Remote command:
HARMonic:THDType on page 323
Statistic
By default, the numeric results indicate the currently measured values. Optionally, you
can switch to the minimum or maximum values. Which value is calculated is indicated
in the result display (see "(9) Result type for numeric results" on page 128).
Note: The bargraph always displays both the current and the maximum values.
Remote command:
HARMonic:STATistic on page 322
Clear Results
Clears the results for previous acquisitions used in statistical evaluation (see "Statistic"
on page 132 and "Average" on page 133).
Remote command:
HARMonic:CLEar on page 319
Fundamental Frequency, Value
Defines the basis of the harmonics measurement. Harmonics are determined as multi-
ples of this frequency.
For a user-defined frequency, select "User" and enter the "Value".
If the specified frequency ±10 % is not detected in the signal, the measurement is inva-
lid. An "F" is displayed as an error indicator.
Remote command:
HARMonic:FUNDamental:TYPE on page 320
HARMonic:FUNDamental:USER on page 321
HARMonic:RESult<m>:FRQMissing? on page 324
Limits, Loaded File
Defines for which harmonics a limit check is to be performed. If a limit check is activa-
ted and the specified limit is exceeded for a harmonic, the background of the harmonic
is highlighted red in the graphic. In addition, an "L" is displayed as an error indicator.
"Limit!" is indicated during the acquisition in which the violation occurs.
If the number of harmonics to be analyzed is restricted by a standard or a user-defined
file, only the results for those harmonics can be displayed or exported (see also "Dis-
play Harmonics, Max No Harmonics" on page 133).
"None"
No limit check is performed. All 64 harmonics can be displayed and
exported.
"EN50160"
Limits are checked according to the predefined values in the
EN50160 standard. Only specific harmonics are selected for analysis.
Harmonics Measurement (Option R&S RTH-K34)