User manual

Operating basics
AFG1022 Quick Start User Manual
39
To output an FSK waveform
Frequency Shift Keying modulation is a modulation technique that shifts the output signal frequency
between two frequencies: the carrier frequency and Hop frequency. The Frequency of the Output
Frequency switch between the carrier waveform frequency and the Hop frequency is called the FSK
rate. The frequency by which the output frequency switch from each other is determined by the
Internal Frequency generator or the Signal Voltage Level offered by the Ext Trig/FSK/Burst
connector in the rear panel. The user interface of the FSK is shown as below.
1. Select a waveform and
then push the front-panel
Mod button
.
2. Press Mod.
In this example, use the
sine waveform as an
output waveform (carrier
waveform).
NOTE: You can only choose
sine, square, ramp, or arb as
a carrier waveform.
3. Select FSK as the
modulation type.
4. The FSK parameter
setting
screen is
displayed.
Select Internal or External
as
FSK source.
5. If you select Internal , you can
set the FSK Rate.
If you select External,
press Slope to switch
between Positive and
Negative.
6. Set Hop Frequency.
Carrier waveform
frequency
shifts to the
Hop frequency with
the
specified FSK rate, and
then
returns to the
original frequency.