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
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
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.
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.