Rigol DG4062, User Manual

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RIGOL Chapter 4 Harmonic Output
DG4000 User's Guide
4-2
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
fundamental waveform frequency,
1
A
is fundamental waveform amplitude and
1
ϕ
is fundamental waveform phase. The frequencies of other components (called
harmonics) are all integral multiples of the fundamental waveform frequency.
Components whose frequencies are odd multiples of the fundamental waveform
frequency are odd harmonics and components whose frequencies are even
multiples of the fundamental waveform frequency are even harmonics.
DG4000 can output up to 16th order of harmonic. After selecting CH1 or CH2,
press
Harmonic at the front panel to enter the harmonic setting menu. Users can
set the parameters of fundamental waveform, set the type of harmonic, specify
the highest order of harmonic and set the amplitude and phase of each order of
harmonic.
After finishing harmonic parameter setting, press
Output1 or/and Output2 and
the backlight of the button turns on, the instrument outputs the specified
harmonic from the corresponding output terminal.
To Set the Fundamental Waveform Parameters
DG4000 allows users to set various fundamental waveform parameters such as
frequency, period, amplitude, DC offset voltage, high level, low level and start phase.
It also supports align phase operation. Please refer to introductions in "
Basic
Waveform Output" to set fundamental waveform parameters.