Frequency Modulation (Fm); To Select Fm Modulation - HP 33120A User Manual

Chapter 3 Features and Functions

Frequency Modulation (FM)

Frequency Modulation (FM)
A modulated waveform consists of a carrier waveform and a modulating
waveform. In , the frequency of the carrier is varied by the amplitude
FM
of the modulating waveform. The function generator will accept only an
internal modulating signal (no external source is available).
FM
For more information on the fundamentals of Frequency Modulation,
refer to chapter 7, "Tutorial".

To Select FM Modulation

• The
annunciator turns on when
FM
• Only one modulation mode can be enabled at a time. When you
enable , the previous modulation mode is turned off.
FM
• Front-Panel Operation: Enable
modulation parameters. Press
using the present settings for the carrier frequency, modulating
frequency, output amplitude, and offset voltage.
• Remote Interface Operation: To ensure proper operation, you should
enable after you have set up the other modulation parameters.
FM
FM:STATe {OFF|ON}
76
is enabled.
FM
before setting up the other
FM
to output an
FM
Shift FM
waveform