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Figure 3-55, Using the Equation Editor to Build Amplitude Modulated
Combining Wave-
forms
3-56 ArbConnection
Signal With Upper and Lower Sidebands
The last feature allows you to combine waveforms previously stored on your
hard disk. Write mathematical expressions containing 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.
Ampl(p)= Sine.wav*sin(omg*p*10)*Noise.wav/1000
The above equation generates an 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 Equation Editor and type
the following equation:
Ampl(p)= 5000*sin(omg*p)
Press OK and then select the Save Waveform As... from the File command.
Save this file using the name Sine.wav
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.
Step 3 – Write and compute the original equation:
User Manual 3155
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