HP 33120A User Manual

Frequency Modulation (FM)
A modulated waveform consists of a carrier waveform and a modulating
waveform. In
FM, the frequency of the carrier is varied by the amplitude
of the modulating waveform. The function generator will accept only an
internal
FM modulating signal (no external source is available).
For more information on the fundamentals of Frequency Modulation,
refer to chapter 7, “Tutorial”.
To Select FM Modulation
• The FM annunciator turns on when FM is enabled.
• Only one modulation mode can be enabled at a time. When you
enable
FM, the previous modulation mode is turned off.
• Front-Panel Operation: Enable
FM before setting up the other
modulation parameters. Press
Shift FM to output an FM waveform
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
FM after you have set up the other modulation parameters.
FM:STATe {OFF|ON}
Chapter 3 Features and Functions
Frequency Modulation (FM)
76

HP 33120A Specifications

General

Frequency Range	100 µHz to 15 MHz
Waveforms	Sine, Square, Triangle, Ramp, Arbitrary
Amplitude Range	10 mVpp to 10 Vpp into 50 Ohms
Output Impedance	50 Ohms
Interface	GPIB
Function Generator Type	Arbitrary
Power Requirements	100/120/220/240 VAC ±10%, 50/60 Hz, 60 VA max