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Example 14: Generate a PSK Modulated Waveform
Generate a PSK modulated waveform with 200 Hz key frequency. The carrier is a sine wave with
1 kHz 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 ‘1’
from the keyboard and choose the unit ‘kHz’ to set the frequency to 1 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 PSK and parameters.
1.
Press Mod → Type → Page 1/2 → PSK, choose PSK. The message shown on the middle left
side of the screen is ‘PSK’.
2.
Press Key Freq, input ‘200’ from the keyboard and choose the unit ‘Hz’ to set the key
frequency to 200 Hz.
3.
Press Polarity → Positive.
When all parameters above are set, the waveform generated is shown in Figure 87
Figure 87 - Generate a PSK Modulation Waveform
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