8
Lab 3
Viewing a complex, AM-
modulated signal with a
high-defi nition display
and deep memory
Oscilloscopes are fi rst and foremost viewing tools – they
help you to see what is going on in your design. Today’s
complex signals combine slow signal trends, with fast
signal transitions. Deep memory enables you to capture
signals over long periods of time while maintaining a
faster sample rate. In this lab, you will see how even a
relatively slow signal can become aliased when using a
shallow memory scope.
Our lab’s signal uses amplitude modulation to mix a slow-
er voice signal (kHz) with a faster carrier wave (MHz).
Your demo kit should come with a USB cable.
Connect the ‘A’ receptacle of the cable to a USB
host port on the back panel of the 5000 Series.
Connect the ‘B’ receptacle of the cable to the
demo board. The USB connection provides power
to the demo board.
Connect the channel 1 probe to the test points
labeled CH1 and ground (GND).
Set the demo board’s MODE dial to 2 to activate
the AM w/MIC signal.
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