Elenco PK101 w/ Computer Interface User Manual
Page 4
IMPORTANT NOTE:
The designs for the microphone input port vary throughout the computer
industry. Hence you may get waveforms different from those shown in your manual even though the
circuit is actually performing the same way. Here are some types of differences:
A. The gain of your microphone input may be significantly different from that indicated on
pages 8-10 (and similarly for the other circuits). Page 6 describes how to turn on the microphone
input and adjust its volume to about 40% of max, you may want to adjust this volume higher or lower
so that your results better match those shown. Note that having the volume set too high may “clip
off” the top or bottom portion of a waveform.
B. The oscilloscope waveforms shown on your display may appear upside down (“inverted”)
from those shown throughout this document. For example the waveform shown on the top of page 9
would look like this:
If this is the case then swap the connections of
the red and black clips of the Winscope probe in
all circuits.
C. The shape of waveforms may appear distorted for some circuits, due to protection circuitry
that acts as a filter. For example:
This
waveform
might look
like this.
And this
waveform
might look
like this.
-4-