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Measuring Harmonic Ratio (U1242C only)
The harmonic ratio function indicates the deviation of non-sinusoidal to sinusoidal
waveform from the range of 0% to 100%, which indicates the presence of
harmonics. A pure sinusoidal waveform without harmonics gives a value of 0%. A
higher harmonic ratio means more harmonics are present on the signal.
Table 2-2
[a] U1242C only.
To set up your multimeter to measure harmonic ratio, first set up your multimeter
to measure AC voltage as shown in Figure 2-2. Probe the test points and read the
display.
The harmonic ratio measurement is shown in the primary display and the AC
NOTE
voltage measurement is shown in the secondary display.
Keysight U1241C/U1242C User's Guide
Rotary switch position allowing harmonic ratio measurements
Legend
Defaul t function
AC V (true rms)
V
Making Measurements
View
Function when
is pressed
Shift
Esc
Cycles between
[a]
– AC V (averaging sense)
[a]
– Harmonic ratio
with AC V (averaging sense)
[a]
– Harmonic ratio
with AC V (true rms), or
– AC V (true rms)
2
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