Chapter 2 Front Panel Operations RIGOL
DG1000Z User’s Guide 2-55
To Select Modulation Source
Press Mod Source to select “Int” or “Ext” modulation source.
1. Internal Source
When internal modulation source is selected, press Shape to select Sine, Square,
Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform. The default
is Sine.
Square: 50％ duty cycle
Triangle: 50％ symmetry
UpRamp: 100％ symmetry
DnRamp: 0％ symmetry
Arb: the arbitrary waveform selected of the current channel
Note: noise can be used as modulating waveform but can not be used as carrier
waveform.
2. External Source
When external modulation source is selected, Shape and PWM Freq will be
grayed out and disabled. The generator accepts the external modulating signal
from the [CH1/Sync/Ext Mod/Trig/FSK] connector at the rear panel. At this
time, the “width deviation” or “duty cycle deviation” of the modulated waveform
is controlled by the ±5 V signal level of the connector. For example, if the width
deviation is set to 10s, +5V signal level corresponds to a 10s width variation.
To Set Modulating Waveform Frequency
When internal modulation source is selected, press PWM Freq to set the frequency
of the modulating waveform.
Use the numeric keyboard or direction keys and knob to input the desired
frequency value.
The frequency range is from 2mHz to 1MHz and the default is 100Hz.
Note: when external modulation source is selected, this menu will be grayed out and
disabled.
[CH1/Sync/Ext Mod/Trig/FSK]
[CH2/Sync/Ext Mod/Trig/FSK]
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