28119 Parallax Inc, 28119 Datasheet - Page 54
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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Your two measurements should be very near 2 kHz and 6 kHz.
Summary
Even though the OPTAscope is a digital oscilloscope, it is well suited to view both digital
and analog signals. Digital signals are usually either high or low, whereas analog signals
can be high, low, or at any voltage in between. Sound waves are made up of sine waves.
√
√
√
√
√
√
√
√
Set the Horizontal dial to 1 ms. You should see a compressed view of the mixed
signal.
Press the FFT button, and the FFT Window will open (Figure 3-11).
Select Black - Harris in the Windowing box.
Click on the ON/OFF button in the Cursor box to turn on the FFT cursor.
Locate the FFT cursor, a white vertical line with a square handle all the way to
the left in the FFT Plot Area.
Move the cursor to the first peak to the right.
Read the Frequency measurement in the Cursor box.
Repeat to measure the second peak.
Figure 3-11:
The OPTAscope
FFT Window.
Note that the FFT
cursor measures
near 2 kHz at the
first peak.
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