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Features and Functions 2
U2761A User’s Guide 61
Phase Modulation (PM)
A modulated waveform consists of a carrier waveform and a
modulating waveform. The following figure shows an example
of a PM 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. The
variation in phase of the modulated waveform from the
carrier waveform is called the phase deviation.
Figure 2-19 PM waveform
To Select PM
The U2761A allows only one modulation mode to be enabled
at a time. The U2761A does not allow PM to be enabled at
the same time that sweep is enabled.
Modulating frequency
Phase deviation