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Example 9: Generate an AM Modulation Waveform
Generate an amplitude-modulated waveform with 80% depth. The carrier is a sine wave with
10 kHz frequency and the modulating wave is a sine wave with 200 Hz frequency.
Set the frequency, amplitude and offset of the carrier wave.
1.
Press Waveforms and choose the sine waveform as the carrier wave.
2.
Press Frequency/Period and choose Frequency which will display in a blue color. Input ’10’
from the keyboard and choose the unit ‘kHz’ to set the frequency to 10 kHz
3.
Press Amplitude/HighLevel and choose Amplitude which will display in blue color. Input’1’
from the keyboard and choose the unit ‘Vpp’ to set the amplitude to 1 Vpp.
4.
Press Offset/LowLevel and choose Offset which will display in a blue color. Input ’0’ from
the keyboard and choose the unit ‘Vdc’ to set the offset to 0 V DC.
Set the modulation type to AM and its parameters.
1.
Press Mod
→
Type
→
AM and choose AM. The message shown on the middle left side of
the screen is ‘AM’.
2.
Press AM Freq, input ’200’ from the keyboard and choose the unit ‘Hz’ to set the AM Freq to
200 Hz.
3.
Press AM Depth, input ’80’ from the keyboard and choose the unit ‘%’ to set the AM depth
to 80%.
4.
Press Shape
→
Sine, to choose sine wave as the modulating waveform.
When all parameters above are set, the waveform generated is shown in Figure 82.
Figure 82 - Generate an AM Modulation Waveform
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