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Chapter 2 Front Panel Operations
RIGOL
To Output Harmonic
DG2000 can be used as a harmonic generator to output harmonic with specified
order, amplitude and phase. It is usually used in the test of harmonic detector device
or harmonic filter device. This section introduces how to configure the generator to
output harmonic.
Harmonic Overview
According to Fourier transform, time domain waveform is the superposition of a
series of sine waveforms, as shown in the equation below:
=
+
+
+
+
+
+
t f
) (
A
sin(
2
t f
)
A
sin(
2
t f
)
A
sin(
2
t f
)
......
1
1
1
2
2
2
3
3
3
Generally, component with
f frequency is called fundamental waveform,
f is the
1
1
fundamental waveform frequency,
A is the fundamental waveform amplitude, and
1
is the fundamental waveform phase. The frequencies of the other components
1
(called harmonics) are all integral multiple of the fundamental waveform frequency.
Components whose frequencies are odd multiples of the fundamental waveform
frequency are called odd harmonics, and components whose frequencies are even
multiples of the fundamental waveform frequency are called even harmonics.
At most, 8th harmonic can be output by DG2000. After selecting CH1 or CH2, press
Shift and its backlight turns on. Then press Home/Menu → Continuous →
"Harm" to enter the harmonic setting menu. You can set fundamental waveform
parameters, select the type of output harmonic, specify the highest order of
harmonic, and set the amplitude and phase of each order of harmonic.
After completing the harmonic parameters setting, press Output1, and the
backlight turns on. The instrument outputs the specified harmonic from the
corresponding output terminal. For details, refer to descriptions in "To Enable
Channel Output".
DG2000 User Guide
2-23
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