EE 211 Logic and Networks Lab
Fall 2009
S p L 7 i r "-(,
Pre-Lab - Measurement Lab Name
1. Sketch the waveforms a and b.
Any good text dealing with the trigonometric functions will provide the details for making
these sketches. The sinusoidal waveform is conveniently expressed as
5f 1
4
/y- e(t) = Am sin (cot + 7.K
7
where Am is the amplitude, co is the radian frequency (2nf), and is the phase angle in
degrees. Be careful to note that a positive 0 will shift the sinusoidal waveform to the left of
the origin. Z ,t o. I z- I s e = l 6
-7. 4
a. 5sin(50t + 45 °)
frequency =
-7
air
Hz
f z6
amplitude =
II
0
_q
b. l0sin(21tlOOt - 60°)
frequency =
I
b
I(
amplitude
/00
d t2
V
c% s y Z S
(. 67.us
3`yT rz.nS
_k 0
Page 12 of 14
EE 211 Logic and Networks Lab
Fall 2009
2. Two waveforms are shown below from an oscilloscope . The sine wave is the channel
1 waveform. The half wave signal is the channel 2 waveform.
On the top row, notice the labels U 500 mV/ and U 500 mV/
This means that the channel 1 waveform and the channel 2 waveform are displayed with
500 mV between each horizontal grid line.
Notice the ground line marker, which marks the vertical position of 0 volts.
On the top row, notice the label 1. 000 Ns/
This means that the waveforms are displayed with 1 µs between each vertical grid line.
(a) On the left side of the figure you should see the tick marks along the vertical edge of
the diagram. Staring with 0 volts at the ground marker, label all the tick marks along the
left side vertical edge with voltage values.
(b) What is the maximum positive voltage of the sine wave? ,l J ,2 /fs
(c) What is the maximum negative voltage of the sine wave? ^- / z s, S
(d) What is the peak to peak voltage of the sine wave?
lj,.^ «k - V :14, - 1, - -- L 2 = ^- `^ 5 ^` S
G•r,^,
(e) Compute the amplitude of the sine wave.
57Amplitude = peak-to-peak/2 = 'Z
(f) Compute the RMS voltage of the sine wave. RM
RMS voltage =
/.22 S
Amplitude =
or g66 rti^
(g) On the bottom of the figure you should see the tick marks along the horizontal edge of
the diagram. Staring with 0µs on the extreme left, label all the tick marks along the
horizontal edge of the diagram.
(h) How many cycles of the sine wave are displayed?
J
(i) How much time is displayed across the entire display.
/_ # cycles / total time
(j) Compute the frequency of the waveform
t70
^) 17 -&
144 -
(k) Compute the period of the sine wave. T = 1/f
/ EC
.S
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EE 211 Logic and Networks Lab Fall 2009
3. Sketch a Lissajous pattern for the following signals.
Horizontal Input to the Oscilloscope (X-axis) = l0sin(100t)
Vertical Input to the Oscilloscope (Y-axis) = l0sin(100t + 60°)
^£ a
ZO rTS ( ^ar^
51?dam` - /^
D 866
8^6b
.14
E,:6
b
4. Sketch a Lissajous pattern for the following signals.
Horizontal Input to the Oscilloscope (X-axis) = l0sin(100t)
Vertical Input to the Olloscope
ci
(Y-axis) = 10sin(200t)
u /C• w f+->
(INSTRUCTOR'S SIGNATURE DATE )
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