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The binary sequence 11100101 is applied to a QPSK modulator. The
bit duration is The
carrier frequency is 5 MHz.
(a) Calculate the transmission bandwidth of the QPSK signal.
(b) Plot the waveform of the QPSK signal.

A carrier signal, Vc(t) = 5cos(1π3000t) F is frequency
modulated by a modulating
signal of 4 kHz with a modulation
index of 2. The FM wave is transmitted through a 50 Ω antenna. With
the aid of Bessel Function Table, determine the:
number of sets of significant sidebands,
frequency deviation,
carrier swing,
minimum and maximum frequency of the FM signal,
bandwidth using Bessel Function Table,
frequencies of all the significant sidebands,
total power of the FM signal.
Hence, sketch and...

A 32-bit parallel bus clocked at a frequency of 300 MHz is to be
replaced with a USB-like bus consisting of just a single serial
channel.
(a) What is the peak throughput of the parallel bus, in Mbytes
per second?
Note: 1 Mbyte/second = 8 x 10^6 bits/second, 1 MHz = 10^6 Hz
(b) If we were to replace this parallel bus with a serial bus
with only a single data channel, what is the minimum frequency for
clocking the...

1. An amplitude modulated system has following parameters:
Modulating signal frequency fm = 500 Hz, Carrier frequency fc =
2KHz. Draw a two-sided spectrum with approximately scaled
frequencies and amplitude. Consider perfect modulation (mod index =
1).
2. What is the typical range of AM modulation index (depth)?
What will happen if it is at the lowest value or highest value in
the range? What will happen if it goes beyond the range? too low a
level of modulation and...

Suppose a 32-bit microprocessor has a 16-bit data bus running on
a 12 MHz clock.
A. If the minimum duration of a bus cycle is 6 clock cycles,
what is the maximum data transfer rate?
B. If the memory in A needs to wait 2 clock cycles for each data
access, what is the maximum data transfer rate?
C. How does the maximum data transfer rate change when the
frequency of the bus is doubled to improve performance in A?...

A plane electromagnetc sinusoidal wave of frequency 40 MHz
tavels free space in the x-direction. at some point and at some
instant, the electric field E has its maximum
value of 700 N/C and is along the y-axis. (a.) draw an illustration
of the electromagnetic wve in a coordinate system, and determine
the wavelength and period of the wave. (b.) calculate the magnitude
and direction of the magnetic field B when E= 700
N/C in the x-direction. (c) what is...

Consider the Voyager spacecraft, transmit frequency 8.4 GHz,
transmitter power PT= 21.3 W, transmitting antenna gain
GT is 6.5 x 104 W/W at a distance of 6.8 x
1011m from Jupiter to Earth. Both the Voyager and earth
based antennas are parabolic dishes whose cross sectional area can
be assumed equal to the effective antenna aperture.
a) Calculate the Voyager antenna gain (dB) and diameter
b) Calculate the receiver antenna gain (dB) with a dish diameter
of 64m.
c) Calculate...

1A) Calculate the velocity of a wave that has a
frequency of 4.6 MHz and a wavelength of 650 nm.
a) 2x106 m/s
b) 2.99 m/s
c) 3x108 m/s
d) 4.6x107 m/s
1B) At what temperature is most matter ionized into a
plasma?
a) 4500 degrees C
b) 100,000 degrees C
c) 13,000 degrees C
d) 6000 degrees C
1C) A physics instructor is trapped in the arctic (-40
degrees C). He has an inside temperature of 33 degrees C,...

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