Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Question
Chapter 18, Problem 2SQ
To determine
Draw the conduit layout with wire connections in each conduit between each piece of equipment with proper terminal markings.
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Determine the figure of merit for both DSB AM and FM, provided that the modulating signal is a single-tone signal.
+
Preemphasis
LHS
R
signal
L RHS
signal
Frequency
doubler
Pilot
tone
(a)
+
Preemphasis
Composite
baseband
spectrum
L+R
Pilot tone
L-R
(DSB-SC)
+
FM
modulator
f (kHz)
(b)
15 19 23
38
53
Lowpass
filter
Deemphasis
+
L
Audio
amplifier
FM
discriminator
Narrowband
filter
Frequency
doubler
Bandpass
R
Audio
✗
Deemphasis
+
filter
amplifier
(c)
and (c) FM stereo receiver.
FIGURE A.25 FM stereo broadcasting: (a) FM stereo transmitter, (b) spectrum of FM stereo signal,
Chapter 18 Solutions
Electric Motor Control
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- 4-3) Similar to Lathi & Ding, Prob. P.4.2-3 For a DSB-SC signal g(t) = 2m(t)cos(4000) transmitting each of the following messages, (a) write an expression for G(f) and (b) sketch the magnitude spectrum |G(f)], specifying the FWHM (full width at half-maximum) of any spectrum peaks. a) m(t) = sinc²(100-50л) b) m(t)=400e-80,000r²arrow_forward4-2) Lathi & Ding, similar to problem 3.8-5. For the filter shown below, with an input signal whose PSD is given by S⭑(f) = П(0.25лf): (a) Find the total input power; (b) Find the transfer function H(f); (c) Find the power spectral density (PSD) of the output signal; (d) Find the total output power of the signal 500 ΚΩ d 1 µF dt y(t)arrow_forward4-1) Distortionless transmission A bandpass signal g(t) of bandwidth B = 2000 Hz centered at f= 5.0x104 Hz is passed through the RC filter below with RC = 4.0x105 radians/s. If over the passband, a variation of less than 2% in both amplitude response and time delay is considered to be distortionless transmission, would g(t) be transmitted without distortion? Find the approximate magnitude response and the approximate time delay for the signal. R w g(1) y(t)arrow_forward
- Fundamentals Of Energy Systems THQ1 Q6arrow_forwardA single phase has two group A and B, 50 Hz, overhead line system has radius of conductor 0.5 cm. alculate the total inductance of the line. a2 a1 6 cm 2 m 3m b₂ m B b₁arrow_forwardA single phase has two group of conductors A & B; where A consists of 3- sub conductors (a, b, c) each of its have a radius of 0.25 cm, and the group B consists of two sub conductors (d, e) each of its have a radius of 0.5 cm. Calculate the inductance of the total system where the distance between the sub conductors is as below. 9m 6m 6m ୦୩ Group A Group Barrow_forward
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