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Chapter 3 Features and Functions
Frequency-Shift Keying (FSK) Modulation
3
Frequency-Shift Keying (FSK) Modulation
You can configure the function 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 Trig In connector.
For more information on the fundamentals of FSK Modulation, refer to
chapter 7, “Tutorial”.
To Select FSK Modulation
• The function generator will allow only one modulation mode to be
enabled at
a time. For example, you cannot enable FSK and AM at the
same time
. When you enable FSK, the previous modulation mode is
turned off.
• The function generator will not allow FSK to be enabled at the same
time that 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}
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