This is the Section 5 Module 3 of the compiled Communications Coaching Materials taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies (EST), Communications Books, Journals and other Communications References. This particular Coaching Notes in Communications Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Communications Engineering Coaching: Section 5 Module 3
What is the distance of density diminishes per gravity
Inverse square law
The channel of TV cable frequency range of 5.75MHz-11.75MHz
Mechanical splice attenuation loss is
The velocity of sound is considered to be constant at
Commonly used telephone wire
A low loss dielectric material is used to cover a dish
What is the highest frequency that can be sent straight upward
NAM stands for?
Numeric assignment module
RF stage preceeds a superhet reciever ,1 advantage of a good RF
Better rejection ratio
What is the input impedance of a quarter wave length shorted
The maximum power output of subscriber
The medium frequency band
The acoustics of most auditoriums when the room is full
Any device to be used as a frequency multiplier
What is a continuous impulse with spikes with short duration
with high amplitudes?
What is the traffic model?
Independent side band
The advantage of a cable communication system over a broadcast
What happens in a capacitor is added in series in an antenna?
It increases the antennas resonate frequency
Refers to the relative refractive index
What is the most commonly used intermediate frequency of radar
Not more than___ digits make up an international telephone
number as amended by CCITT
Twists in twisted wire pairs
Produce electromagnetic interference
What is made by the term ?????????????????????
The frequency range over which is expected to perform
Area of earth the covered by a satellite radio beam
Speaking of antenna, __ is a section of antenna in which would
be a complete antenna by itself
Is the process by which a customer maybe accepted with the
absence of establish interference standards that corresponds to the specifications
What is the horizontal angle?
In the TV system is a measure of ability to tell the lining
KBP radio code handles the station provides a minimum of ____
Which of the following is the basic component for satellite
In radio communication the term trap antenna is referred to
one of the following statements
Antenna which can be used more than 1 band due to the use
of power in LC networks
The current maximum in a marconni antenna is found at ____
The base of the antenna
The antenna effective height is _ to _ actual height
½ to 2/3
A computer terminal that will program the perform function
The most commonly used Transmission Line in TV system
What type of emission is produced when a frequency modulated
is modulated on TV signal?
What causes quantization in a PCM system?
The approximation of quantized signal
With lights not polish into fiber it produces a loss of
Frequency division is useful to implementation of a ____
An advantage of FM over AM
Signal to noise improvement
Characters that must be transmitted other than data
What is used in antenna in order to increase it effective
Which modulation methods are the most widely used?
Intensity modulation with polarization modulation
If the diameter of conductors are two wire Transmission Line
Decrease the impedance
Is the aural monochrome television broadcast channel?
sound generating Modulating waveform for FM will cause a
The modulation index of an AM is changed from 0 to 1 the
transmitted power is
Increased by 50%
What will happen in a quarter wave Transmission Line is
Behaves as a series short circuit
Every time the telephone is answered the handset is of the _
On hook state
Most fiber optic light sources emit light in which spectrum
Lightning rods mounted at top of structure
What particular stage does frequency provides fidelity?
Which of the following is not a common light detector
The Gunn diode oscillator
Depends on the formation of charge
Creators shall require to provide local exchange service
Which major element has super heterodyne receiver must be nonlinear?
The SWR is infinite
The most commonly used filter SSB generators uses ____
Klystron oscillators frequency range of _____
What is the average insertion loss of fusion splice in Fiber
Which of the reception problem that is not multipath?
it is a protocol used to connect the other packets
What is the power loss of a telephone hybrid?
index multimode optical
What is a measure of reliability express as an average number?
Term that refers to the numerical range which relates the
performance of one antenna to theoretical antenna
What is the gateway telecommunications T2?
High speed LANs data rate
rainfall is an important factor of frequency above ____
What is the basis of the first generation wireless?
Analogue cellular technology
When microwave signals follow the curvature of the earth?
quantizing noise occurs in ____
What network provides the greatest?
What type of signal selectivity?
What circuit is used to detect frequency modulated signal?
Number of voice transmission that can be ?????????????????
popular line wavelength Fiber Optic Cable
Which is the simplest effective in changing?
are used in all communication system when propagation time
Which stands for dB relative?
Water vapor and oxygen
minimum propagation delay of geo satellite
cable consists of twisted pairs of conductors, each separately
30 -53 KHz
signal to noise ratio required for satisfactory TV reception
Start of test for BISYNC
Short bit sequence 128 bits
rules and description binary
affected by the distance
information about satellite send to earth
if away from source
measures virtual height of ionosphere
sound travels fastest at