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Example 11: Generate a PM Modulated Waveform
Generate a PM modulated waveform, the carrier is a sine wave with 10 kHz frequency, and the
modulating wave is a sine wave with 2 kHz frequency and 90° phase deviation.
⚫ 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 a blue color. Input
’5’ from the keyboard and choose the unit ‘Vpp’ to set the amplitude to 5 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 PM and parameters.
1. Press Mod → Type → PM and choose PM. The message shown on the middle left side of the
screen is ‘PM’.
2. Press PM Freq, input ‘2’ from the keyboard and choose the unit ‘kHz’ to set the PM Freq to
2 kHz.
3. Press Phase Dev, input ‘90’ from the keyboard and choose the unit ‘°’ to set the phase
deviation to 90°.
4. Press Shape →Sine to choose a sine wave as the modulating waveform.
When all parameters above are set, the waveform generated is shown in Figure 84.
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