Chapter 5 Modulated Waveform Output
DG4000 User's Guide
5-9
PM
Modulated waveform consists of carrier waveform and modulating waveform. For
phase modulation (PM), the phase of the carrier waveform varies with the
instantaneous voltage of the modulating waveform.
To Select PM Modulation
Press
Mod
Type
PM to enable PM function.
When
Mod is enabled, Sweep or Burst will be automatically disabled (if
currently enabled).
After PM is enabled, the instrument will generate PM waveform with the
currently specified carrier and modulating waveforms.
To Select the Carrier Waveform Shape
PM carrier waveform could be Sine, Square, Ramp or Arbitrary waveform (except
DC). The default is Sine.
Press the front panel key
Sine, Square, Ramp or Arb
Select Wform
(or
User, the pre-defined waveform cannot be DC) to select the desired
carrier waveform shape.
Pulse, Noise and DC could not be used as carrier waveform.
To Set the Carrier Frequency
Different carrier waveforms have different frequency ranges as shown in the table
below. For all the carrier waveforms, the default value is 1kHz.
Carrier Waveform
Frequency Range
Sine
1μHz to 160MHz
Square
1μHz to 50MHz
Ramp
1μHz to 4MHz
Arbitrary Waveform
1μHz to40 MHz
Содержание DG4062
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