DISPLAY/HARMONICS
3–18
THS710A, THS720A, THS730A & THS720P User Manual
Status Line. The status line across the top of the display contains
acquisition and trigger information similar to scope mode display.
Refer to page 3–49 for more information. The harmonics indicator
shows the currently selected harmonic. Press the
+
/– rocker to
display power measurements for the next/previous harmonic.
Harmonic Measurements. The readout lines above the graticule contain
harmonic measurements for the waveform and the selected
harmonic.
Harmonic
Measurements
Explanation
THD–F or THD–R Total harmonic distortion of the waveform as a
percentage of the fundamental (THD–F) or of the
RMS of the input signal (THD–R)
RMS RMS value of the input signal over one cycle
%Fund Amplitude of the selected harmonic as a percent of
the fundamental
hRMS RMS value of the selected harmonic in volts or
amperes
Freq Freqency of the selected harmonic
Phase Phase of the selected harmonic relative to the phase
of the fundamental
Message Line. A message, such as “Low Amplitude,” is displayed in
the message line when the input signals do not meet the conditions
necessary to take accurate measurements. Correct the condition
before proceeding.
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