Spectrum Analysis
R&S
®
Scope Rider RTH
138User Manual 1326.1578.02 ─ 12
Limits, Loaded File...................................................................................................... 139
Open........................................................................................................................... 139
Display Harmonics, Max No Harmonics......................................................................140
Average.......................................................................................................................140
[CH <n>]
Selects the channel for which the captured data is analyzed in "Harmonic" mode. Har-
monic measurements can be performed on all channels simultaneously. The results
are indicated by different colored bars and numbers, corresponding to the channel but-
ton color.
Remote command:
CHANnel<m>:STATe on page 299
Scale
Switches the scale for the measured harmonic levels between logarithmic (dB) and lin-
ear (percent). The values are relative to the level measured for the fundamental fre-
quency.
Remote command:
HARMonic:SCALe on page 370
THD Type
Switches between different calculation methods for the total harmonic distortion.
"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 371
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 134).
Note: The bargraph always displays both the current and the maximum values.
Remote command:
HARMonic:STATistic on page 370
Clear Results
Clears the results for previous acquisitions used in statistical evaluation (see "Statistic"
on page 138 and "Average" on page 140).
Remote command:
HARMonic:CLEar on page 367
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".
Harmonics Measurement (Option R&S
RTH-K34)
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