AFG1000 Series Quick Start User Manual
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 by which the
output frequency switch from each other is determined by the Internal Frequency generator or the
Signal Voltage Level offered by the Fsk/Ext Trig In connector in the rear panel.
1.
Select a waveform and
then push the front-panel
Mod button.
In this example, use
the
sine waveform as an
output waveform (carrier
waveform).
2.
Press Mod.
NOTE: You can only choose
sine, square, ramp, or arb as
a carrier waveform.
3.
Press Type to display the
modulation selection menu.
Press NextPage.
4.
Select FSK as the modulation
type.
5.
The FSK parameter setting
screen is displayed. Select
Internal or External as FSK
source.
6.
If you select Internal, you can
set the FSK Rate. The
frequency at which the output
frequency shifts between the
carrier frequency and the Hop
frequency is called the FSK
rate.
If you select External, press Slope
to switch between Positive and
Negative. The external source can
be offered by the Fsk/Ext Trig In
connector in the rear panel. Set the
Slope to Positive and the
generator would output the carrier
frequency when the external input
signal is logic low level and output
the hop frequency when the
external input signal is logic high
level. The situation is the opposite
when the Slope is set to Negative.
7.
Set Hop Frequency.
Carrier waveform frequency
shifts to the Hop frequency with
the specified FSK rate, and then
returns to the original frequency.
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