ELECTRICITY FOR TRADES (LL W/ACCESS)
3rd Edition
ISBN: 9781260699487
Author: Petruzella
Publisher: MCG CUSTOM
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Chapter 8.1, Problem 1RQ
In what way is resistance wire different from the wire used for circuit conductors?
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An FDM is used to multiplex two groups of signals using AM-SSB, the first group contains
25 speech signals, each has maximum frequency of 4 kHz, the second group contains 15 music
signals, each has maximum frequency of 10 kHz. A guard bandwidth of 500 Hz is used bety
each two signals and before the first one.
1. Find the BWmultiplexing
2. Find the BWtransmission if the multiplexing signal is modulated using AM-DSB-LC.
An FM signal with 75 kHz deviation, has an input signal-to-noise ratio of 18 dB, with a
modulating frequency of 15 kHz.
1) Find SNRO at demodulator o/p.
2) Find SNRO at demodulator o/p if AM is used with m=0.3.
3) Compare the performance in case 1) and 2)..
Hint: for single tone AM-DSB-LC, SNR₁ = (2m²) (4)
Find Va and Vb using Nodal analysis
Chapter 8 Solutions
ELECTRICITY FOR TRADES (LL W/ACCESS)
Ch. 8.1 - In what way is resistance wire different from the...Ch. 8.1 - What is the trade name for the most popular type...Ch. 8.1 - Prob. 3RQCh. 8.1 - Name the three ways by which resistors are rated.Ch. 8.1 - Resistors are classified as passive devices. Why?Ch. 8.1 - Identify the type of circuit that generally...Ch. 8.1 - State two functions served by a fusible resistor.Ch. 8.1 - What advantage do film resistors have over...Ch. 8.1 - What are the two configurations for chip...Ch. 8.1 - In what way is the construction of an adjustable...
Ch. 8.1 - Compare the connection and control function of a...Ch. 8.1 - If the wiper arm of a linear potentiometer is...Ch. 8.1 - Explain how a 10-turn trim pot is adjusted.Ch. 8.1 - Compare the way the resistance varies in a linear...Ch. 8.1 - Identify the color bands for each of the following...Ch. 8.1 - A 680- resistor has a rated tolerance of 10...Ch. 8.1 - What is the color code for a 365- five-band...Ch. 8.1 - Determine the resistance value and percentage of...Ch. 8.1 - Determine the resistance value and percentage of...Ch. 8.2 - Calculate the total resistance for each of the...
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