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Chapter 3 Features and Functions
Amplitude Modulation (AM)
3
Amplitude Modulation (AM)
A modulated waveform consists of a carrier waveform and a
modulating waveform. In AM, the amplitude of the carrier is varied
by the instantaneous voltage of the modulating waveform. The function
generator will accept an internal or external modulation source.
For more information on the fundamentals of Amplitude Modulation,
refer to chapter 7, “Tutorial”.
To Select AM Modulation
• The function generator will allow only one modulation mode to be
enabled at a time. For example, you cannot enable AM and FM at the
same time. When you enable AM, the previous modulation mode is
turned off.
• The function generator will not allow AM to be enabled at the same
time that sweep or burst is enabled. When you enable AM, the sweep
or burst mode is turned off.
• Front-Panel Operation: You must enable AM before setting up any of
the other modulation parameters. Press and then select “AM”
using the Type softkey. The AM 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 AM after you have set up the other modulation parameters.
AM:STATe {OFF|ON}
33210A users guide.book Page 72 Wednesday, July 16, 2008 11:16 AM
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