OWON AG (-F) Series - Manual (Page 31)

5.Front Panel Operation
26
Term Explanation
AM Frequency:
The frequency of modulating waveform.
Mod Depth:
The Amplitude Range of modulating waveform. In the 0% Modulation, the output
amplitude is the half of the set one. In the 100％ Modulation, the output amplitude
is the same with the set one. For an external source, the depth of AM is controlled by
the voltage level of the signal connected to the Ext Mod In connector in the rear
panel. +5V corresponds to the currently set depth 100%.
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.
Current Parameter
Carrier
Frequency
Carrier
Amplitude
Carrier Waveform
Modulating Waveform
Load
Frequency Deviation
FM Frequency
Mod Type
Mod Shape
Source
Figure 5-18: The User Interface of FM
How to set the parameters of FM
(1)
Press Mod function button, then press F1 to select Mod.
(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
page 12. Press
button again to return to the Modulation mode interface.
(4)
Press F5 to select the source. If the source is External, use the Ext Mod 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.