Voltage Dividers
Procedure:
Open Multisim Software
Program Files -> National Instruments (folder) -> Circuit Design Suite -> Multisim
START A NEW PROJECT BY GOING TO FILE>NEW>NI ELVIS I Design. You will get a workspace that has the connections you will find on our ELVIS board. Later we will see a 3-D Model of the ELVIS Board.
Part 1:Build a Voltage Divider and Test it with Loads.
In the next step the load is attached as asked in the table and readings are taken
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Location to measure Voltage
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Load Resistor connected at that location (Ohms)
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Expected (V )
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Measured (V)
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% difference (Difference divided by expected)
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Power delivered to load resistor using measured voltage (Watts)
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P = (V^2)/R
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Vc
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1000
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6
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2.4
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60.0
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0.006
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Vc
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4700
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6
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4.5
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25.0
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0.004
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Vc
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10000
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6
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5.21
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13.2
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0.003
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Vc
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20000
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6
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5.58
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7.0
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0.002
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Vc
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100000
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6
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5.9
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1.7
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0.000
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Vb
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1000
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10
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5.4
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46.0
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0.029
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Vb
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4700
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10
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8.4
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16.0
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0.015
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Vb
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10000
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10
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9.2
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8.0
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0.008
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Vb
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20000
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10
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9.5
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5.0
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0.005
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Vb
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100000
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10
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9.9
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1.0
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0.001
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Va
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1000
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12
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12
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0.0
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0.144
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Va
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4700
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12
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12
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0.0
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0.031
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Va
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10000
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12
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12
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0.0
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0.014
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Va
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20000
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12
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12
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0.0
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0.007
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Va
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100000
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12
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12
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0.0
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0.001
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Which load affected the voltage divider the most (highest % difference)?
Which load value resulted in the highest power dissipated in the load resistor at Va
Which load value resulted in the highest power dissipated in the load resistor at Vb?
Which load value resulted in the highest power dissipated in the load resistor at Vc?_____________
Is it the same load resistor for max power transfer for Vb and Vc? _________________
PASTE THE GRAPH HERE:
Part 2.
SCREENSHOT OF completed 3-D BREADBOARD CIRCUIT AND ATTACH HERE:
LINE CODE:
Q1. (a) Define Line Encoding.
(b). What are the desirable properties of line coding
(c) Draw signals with different line codes
NYQUIST'S SAMPLING
Q2 a) Briefly explain Nyquist's Sampling Theorem. Why it is necessary
(b). Show, using diagrams of the signal spectrum, why a signal that is sampled below the Nyquist rate will suffer distortion.
RADIO OVER FIBER
Explain the principle of RoF technology and discuss the associated benefits in terms of cost and performance.
OFDM
Q. (a).Define OFDM. Draw the transmission model of OFDM and its methodology.
b. What are the advantages of OFDM
TRANSMISSION IN PACEKT SWITCH NETWORKS
Briefly explain and compare Circuit Switched Networks and Packet Switched Networks.
DIGITAL MODULATION OF CARRIERS
(A) Define the concept of digital modulation. techniques?
(B) What are the most common digital modulation
PROPAGATION OF RADIO SIGNALS
Describe how radio signals propagate between a moving mobile phone terminal and a cellular base station in a built up area. Explain how this affects the channel characteristics associated with a mobile channel