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MACSCOPE II

MacScope II is an audio software oscilloscope that works om Mac & Windows, using the computer's 16 bit audio input. Below are 3 diagrams from the MacScope Instruction Manual, illustrating MacScope's capability to handle triggering, signal averaging and Fourier analysis. MacScope II is available on the $10 CD Physics2000.

MacScope is now an Upgrade/Shareware program that you can download from this website (click on Free Downloads). If you own a copy of the Physics2000 CD, then you are downloading a free upgrade. If you do not own the Physics2000 CD, then the copy you download is shareware. When you open MacScope, you will be reminded that your shareware copy can be made your own by purchasing the $10 CD.

Sound of a wooden frog.
We triggered MacScope on the sound of the wooden frog purchased from Educational Innovations Inc.

Signal averaging

Simultaneous display of averaged and raw data.
MacScope can simultaneously display the signal averaged data (Curve A) and the raw data that is being aeraged (Curve B). In the Tools Window averaging section, for Curve A we selected Average Until Stop , while for Curve B averaging we selected None.

Largest harmonic selected

Fourier analysis of a pulse.
Here we see how a short pulse is constructed from long sinusoidal waves. In (a) we selected te largest harmonic and all it represents is a small since wave.

Fig. (b)Fig. (c)Fig. (d)

When we add together the five biggest harmonics in (b), a pulse begins to form. When we add up the 32 biggest harmonics, we get a close representation of the pulse in (d). We need a lot of harmonics to cancel the wave between pulses.

We use this analysis in the instruction manual's discussion of the time-energy form of the uncertainty principle.

 

Download MacScope and the MacScope Manual for free from the Downloads page.

 

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