Rigol DG800 Series, Руководство пользователя

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Chapter 2 Front Panel Operations RIGOL
DG800 User's Guide 2-23
To Output Harmonic
DG800 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:
...... ) 2 sin( ) 2 sin( ) 2 sin( ) (
3 3 3 2 2 2 1 1 1
+ + + + + + =
ϕ π ϕ π ϕ π
t f A t f A t f A t f
Generally, component with
1
f
frequency is called fundamental waveform,
1
f
is the
fundamental waveform frequency,
1
A
is the fundamental waveform amplitude, and
1
ϕ is the fundamental waveform phase. The frequencies of the other components
(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 DG800. After selecting CH1 or CH2, press
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".