28119 Parallax Inc, 28119 Datasheet - Page 51
28119
Manufacturer Part Number
28119
Description
KIT UNDERSTANDING SIGNALS
Manufacturer
Parallax Inc
Datasheet
1.28119.pdf
(137 pages)
Specifications of 28119
Lead Free Status
Contains lead
Accessory Type
Oscilloscope
Interface Type
USB
For Use With/related Products
BASIC Stamp® 2 and Board of Education
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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ACTIVITY #3: DUAL SINE WAVE MEASUREMENT
The BASIC Stamp’s
on the same pin. In this step, we’ll add the second frequency. Pure tones are generated by
single sine waves. However, most tones you hear coming from your average electronic
consumer goods are actually mixed tones. The previous exercises generated a pure tone,
while the next exercise combines two different frequencies. In this way you will be able
to hear, and see, the difference between pure and mixed tones.
√
√
√
√
First move the vertical cursors to the centers of the two peaks in the middle to
measure the frequency of the sine wave. You should get 500 Hz.
Record your ∆ V and f measurements, and make a note about volume and pitch.
Repeat this process for five more frequencies in the 1000-5000 Hz range, again
making a note of your ∆ V and f measurements, volume and pitch. Hint: try
setting the Mouse Function switch to Zoom when measuring the 5000 Hz signal.
Make a chart of your data. What can you infer from your five amplitude
measurements?
FREQOUT
command provides the ability to generate two sine waves
Figure 3-9:
500 Hz
frequency
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