Agilent-technologies AGILENT U2761A Manuel d'utilisateur télécharger pdf (Page 79)

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

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 122 123

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Agilent-technologies AGILENT U2761A Manuel d'utilisateur Page 79