Agilent Technologies Agilent 33500 Series, User Manual

Page: 131 / 278

130
Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation
3
Frequency-Shift Keying (FSK) Modulation
You can configure the waveform generator to “shift” its output frequency
between two preset values using FSK modulation. The rate at which the
output shifts between the two frequencies (called the “carrier frequency”
and the “hop frequency”) is determined by the internal rate generator or
the signal level on the rear-panel
Ext Trig connector.
For more information on the fundamentals of FSK Modulation, refer to
chapter 5, “Tutorial.”
To Select FSK Modulation
• The waveform generator will allow only one modulation mode to be
enabled at a time. When you enable FSK, the previous modulation
mode is turned off.
• The waveform generator will not allow FSK to be enabled when
sweep or burst is enabled. When you enable FSK, the sweep or burst
mode is turned off.
• Front-Panel Operation : You must enable FSK before setting up any of
the other modulation parameters. Press and then select
FSK
using the
Type
softkey. The FSK waveform is output using the
present settings for the carrier frequency, output amplitude, and
offset voltage.
• Remote Interface Operation : To avoid multiple waveform changes,
enable FSK after you have set up the other modulation parameters.
FSKey:STATe {OFF|ON}