Fm (Frequency Modulation) - Owon AG4101 User Manual

FM (Frequency Modulation)

The modulated waveform consists of two parts: the Carrier Waveform and the
Modulating Waveform. The Carrier Waveform can only be Sine. In FM, the frequency of
the Carrier Waveform varies with the instantaneous voltage of the modulating waveform.
The user interface of the FM is shown as below.
Load
Frequency Deviation
Mod Type
Mod Shape
Source
Carrier Waveform
How to set the parameters of FM
(1) Press Mod function button to enter the Modulation mode.
(2) Press F1 to switch Mod Type to FM. If the Carrier Waveform is not Sine, the
system will switch it to Sine automatically.
(3) Press button to display the waveform and parameters of the Carrier
Waveform. You can change the parameters, please refer to "To Output Sine Signals"
on P11. Press
(4) Press F5 to select the source. If the source is External, use the Modulation In
connector in the rear panel to input the external signal, then skip ahead to step (6). If
you choose Internal, continue to the steps below.
(5) Press F2 to choose Mod Shape, you can choose Sine, Square or Ramp.
(6) Press F3 to set Mod Frequency. The range is 2 mHz～20 KHz (Internal source
only).
(7) Press F4 to set FM Deviation. The Deviation should be less than the Carrier
Waveform Frequency.
5.Front Panel Operation
FM Frequency
Current Parameter
Carrier
Amplitude
Figure 5-13: The User Interface of FM
button again to return to the Modulation mode interface.
Carrier
Frequency
22
Modulating Waveform
Carrier Waveform