Description : What circuit in the TV receiver is used to develop the high voltage needed to operate the picture tube?
Last Answer : Horizontal output
Description : The sound IF in a TV receiver is
Last Answer : 41.25 MHz
Description : A 4.5-MHz signal which is equal to the difference between the picture and sound RF carrier frequencies in a 6-MHz TV channel.
Last Answer : Intercarrier frequencY
Description : A system where the modulated RF picture and sound carrier signals are distributed in a cable network, instead of wireless system.
Last Answer : CATV
Description : It is the ratio of the largest possible magnitude to the smallest possible magnitude that can be decoded by the digital-to-analog converter in the receiver.
Last Answer : Dynamic range
Description : Involves compression in the transmitter after the input sample has been converted to a linear PCM code and then expansion in the receiver prior to PCM coding:
Last Answer : Digital companding
Description : To a conventional narrowband receiver, a spread spectrum signal appears to be
Last Answer : Noise
Description : In PAM demultiplexing, the receiver clock is derived from
Last Answer : the PAM signal itself
Description : In a radio receiver with simple AGC:
Last Answer : an increase in signal strength produces more AGC
Description : Message _______ means that the receiver is ensured that the message is coming from the intended sender, not an imposter
Last Answer : authentication
Description : The modulated picture carrier wave includes the composite video signal as the:
Last Answer : Symmetric envelope of amplitude variations
Description : How long does it take to scan 2 picture elements when 400 are scanned in 50 microseconds?
Last Answer : 0.25 microsec
Description : Picture frames are repeated at the rate of ___ per second
Last Answer : . 30
Last Answer : 30
Description : An image uses 512 x 512 picture elements. Each element can take any of eight distinguishable levels. The maximum entropy in the above image will be:
Last Answer : 786432 bits
Description : The total bandwidth of an NTSC TV signal is:
Last Answer : . 6 MHz
Description : The width of the vertical sync pulse in the Philippine TV system is
Last Answer : 3H
Description : The number of frames per second in the Philippine TV system is
Last Answer : 6 MHz
Description : To avoid objectionable noise in a microwave TV link, the SNR should be about:
Last Answer : 25 or more
Description : In a TV studio the illuminance is about:
Last Answer : 1000 lux
Description : The most critical and difficult part of receiving a direct – sequence spread spectrum signal is :
Last Answer : Synchronism
Description : does its best to get a transmission through to its destination, but with no guarantees
Last Answer : best-effort delivery
Description : What part or section of a TV receiver that separates the sound and video signals? A. IF stage B. Video amplifier C. Video detector D. Burst separator
Last Answer : C. Video detector
Description : Raster scan or tv scan video monitors are used extensively for what purpose?
Last Answer : The display of alphanumeric data and graphics.
Description : At what frequency compared to the cutoff frequency of a waveguide will the wavefronts be reflected back and forth across the guide (setting up standing waves) and no energy
Last Answer : UHF receiving antenna
Description : A mode where the entire magnetic field is in the transverse plane and has no portion parallel to the length axis.
Last Answer : TM mode
Description : The service are in standard AM broadcast is described as ______ if there is no fading of signal.
Last Answer : Primary
Description : It is logically equivalent to making telephone call through the DDD network except no direct end-to-end connection is made
Last Answer : Virtual call
Description : The fields surrounding the antenna do not collapse their energy back into the antenna but rather radiate it out in space
Last Answer : radiation field
Description : What device can be constructed to allow microwave energy to pass in one direction but blocks energy in the other direction in a waveguide?
Last Answer : errite Isolato
Description : I live in cookstown, what type of signal do I have Is it digital I find my picture quality to be poor & was wondering if a cable booster would help. If so does Rogers sell them?
Last Answer : The kind of signal you have would depend on who your service is through and what kind of service it is, and yes Rogers has a 'signal booster'.
Description : Heart murmur indicates a - (1) defective valve (2) poor oxygenation (3) dislocation of the heart (4) improper development of muscles
Last Answer : (1) defective valve Explanation: Murmurs are pathologic heart sounds that are produced as a result of turbulent blood flow that is sufficient to produce audible noise. A functional murmur or " ... through which blood flows in or near the heart. Such murmurs are known as pathologic murmurs.
Description : A child is a back -bencher and is unable to watch the black-board clearly, therefore he stands, see and sit repeatedly. It disturbs the nearby classmates, what inference will you draw with reference to the ... defective eyes C) The black-board may has shining effect of light D) None of the above
Last Answer : A) The child has poor eye-sight
Description : Heart murmur indicates a (1) defective valve (2) poor oxygenation (3) dislocation of the heart (4) improper development of muscles
Last Answer : defective valve
Description : Does the quality of my receiver affect the sound quality of my car's subwoofer?
Last Answer : While a good receiver is important, the subwoofer is really in control of sound quality.
Description : The magnetic field of an antenna is perpendicular to the earth. The antenna’s polarization ___
Last Answer : is horizontal
Description : It is the ratio of the power density radiated in a particular direction to the power density radiated to the same point by a reference antenna, assuming both antennas are radiating the same amount of power
Last Answer : directive gain
Description : The property of interchangeability for the transmitting and receiving operations is known as ____
Last Answer : reciprocity
Description : It is the ratio of the radiated to the reflected energy:
Last Answer : Radiation efficiency
Description : It is the resistance that, if it replaced the antenna, would dissipate exactly the same amount of power that the antenna radiates
Last Answer : . Radiation resistance
Description : Plots of field strength or power density with respect to the value at a reference point.
Last Answer : relative radiation pattern
Description : The radiation pattern plotted in terms of electric field strength or power density
Last Answer : absolute radiation pattern
Description : The line bisecting the major lobe, or pointing from the center of the antenna in the direction of maximum radiation is called _____
Last Answer : line of shoot
Description : A special type of transmission line that consist of conducting metallic tube through which high frequency electromagnetic energy is propagated
Last Answer : waveguide