3.13. Example 13:Generate an ASK Wave
Generate an ASK waveform with 500Hz key frequency. The carrier is a sine
wave with 5kHz frequency.
Steps:
Set the frequency, amplitude and offset of the carrier wave.
1. Press Sine , and choose the sine waveform as the carrier wave
2. Press Freq and choose Freq which will display in white color. Input ‘5’ from
the keyboard and choose the unit ‘kHz’ to set the frequency 5kHz
3. Press Ampl and choose Ampl which will display in white color. Input ‘5’ from
the keyboard and choose the unit ‘Vpp’ to set the amplitude 5Vpp.
4. Press Offset and choose Offset which will display in white color. Input ‘0’
from the keyboard and choose the unit ‘Vdc’ to set the offset 0Vdc.
Set the modulation type ASK and parameters.
1. Press
Mod
→
Type
→
ASK, choose ASK. Please notice that the message
shown on the middle left side of the screen is ‘ASK ’.
2. Press Key Freq, input ‘500’ from the keyboard and choose the unit ‘Hz’ to
set the key freq 500 Hz.
When all parameters above are set, the wave generated is shown in Figure 3-
13
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