9
Agilent 5000 Series
If you did not try Lab 1 or Lab 2:
Press
Save/Recall
and
Default
Setup
to ensure the scope is in an
initial known state. Press
Trigger
mode and switch from Auto to
Normal triggering.
Press
Autoscale
.
Turn the
Horizontal Time/Div
knob
in a counter-clockwise direction.
When you reach 20 µs/div, you
will be viewing signals in the 5 kHz
voice range.
The AM carrier frequency is 20
MHz. By how many times are you
oversampling?
Select
Delayed
for a “forest and
trees” view. Then use
Quick Meas
to select a frequency measurement.
What is the frequency of the carrier
wave?
Push the
Main/Delayed
button under the
Horizontal
section of
the front panel. What
is the sample rate at
20 µs/div?
Tap gently on or
whistle into the
Microphone
input
on the demo board.
Observe the display
responsiveness.
Tektronix TDS3000B Series
If you did not try Lab 1 or Lab 2:
Press
Save/Recall
,
Recall
Factory Setup
and
OK Confi rm
Factory Init.
to ensure the
scope is in an initial known
state.
Using the
Waveform Intensity
knob on the front panel, adjust
the intensity to approximately
50%.
Press
Autoset
.
Using the
Vertical
Scale
knob,
adjust the volts/
div to 500 mV/div.
Turn the horizontal time/div knob
in a counter-clockwise direction to
20 µs/div to view kHz signals. At
what t/div setting do you begin to
see aliasing?
Select
Measure
then
Frequency
.
What is the frequency of the carrier
wave?
Using the
Vertical
Position
knob,
move the waveform
down by approxi-
mately 2 divisions
to center it on the
screen.
Press the
Acquire
Menu
button to view
the current
sample rate.
Zoom back to 10 µs/
div. Tap gently on
or whistle into the
Microphone
input
on the demo board.
Observe the display
responsiveness.
Using the
Intensity
knob,
adjust the waveform
intensity to approximately
50%.
