Operating Basics
AM Modulation depth
M [%]
FM Deviation
D [Hz]
PM Deviation
P [degree]
The following table shows relationship between modulation depth and
maximum amplitude for AM modulation waveform (internal modulation
source is selected):
Depth
Maximum amplitude
120%
A (V
p-p
)
100%
A (V
p-p
) * 0.909
50%
A (V
p-p
) * 0.682
0%
A (V
p-p
) * 0.455
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 AFG2021 generates a phase continuous FSK signal.
1.
Follow the steps described in
the
To output an AM waveform
procedure to display the
modulation type selection
submenu.(See page 53.)
In this example, select FSK as
the modulation type.
2.
The FSK parameter setting
screen is displayed.
Select Internal or External as
FSK source.
3.
If you select Internal, you can set
the FSK Rate.
If you select External, the FSK
Rate is ignored.
4.
Set Hop Frequency.
Carrier waveform frequency
shifts to the Hop frequency with
the speci
fi
ed FSK rate, and then
returns to the original frequency.
AFG2021 Quick Start User Manual
55