2074
User Manual
4-54
Figure
4-41, Using the Editor to Build Amplitude Modulated Signal with Upper and Lower Sidebands
Combining
Waveforms
The last but not least powerful feature allows you to combine
waveforms which you previously stored on your hard disc. You can
write mathematical expressions that contain waveforms, simple
operands and trigonometric functions similar to the example given
below. If you want to use waveforms in your equations, you must
first generate these waves and store them on your hard disk. You
identify waveforms by adding the *.wav extension as shown in the
example below.
Amplitude(p)=
Sine.wav*sin(omg*p*10)*Noise.wav/1000
The above equation will generate amplitude-modulated waveform
with added noise. The following steps demonstrate how to create,
store and combine waveforms using this equation.
Step 1
– Create and store sine.wav. Invoke the Wave command
and generate a sine waveform. Press OK and then select the Save
Waveform As… from the File command. Save this file using the
name Sine.wav. Note where you store this waveform as you would
have to know the path for the next step.
Step 2
– Create and store Noise.wav. From the Wave command
select Noise. Click OK and watch your waveform screen draw noisy
signal. From the File menu select Save Waveform As… and save
this waveform using the name Noise.wav.
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