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Phase Modulation (PM)
A modulated waveform consists of a carrier waveform and a
modulating waveform. PM is very similar to FM, but in PM the phase of
the modulated waveform is varied by the instantaneous voltage of the
modulating waveform.
For more information on the fundamentals of Phase Modulation, refer to
chapter 7, "Tutorial".
To Select PM Modulation
• The function generator will allow only one modulation mode to be
enabled at a time. For example, you cannot enable PM and AM at the
same time. When you enable PM, the previous modulation mode is
turned off.
• The function generator will not allow PM to be enabled at the same
time that sweep or burst is enabled. When you enable PM, the sweep
or burst mode is turned off.
• Front-Panel Operation: You must enable PM before setting up any of
the other modulation parameters. Press
using the Type softkey. The PM waveform is output using the present
settings for the carrier frequency, modulating frequency, output
amplitude, and offset voltage.
• Remote Interface Operation: To avoid multiple waveform changes,
enable PM after you have set up the other modulation parameters.
PM:STATe {OFF|ON}
Chapter 3 Features and Functions
Phase Modulation (PM)
and then select "PM"
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