Sheet1CHAPTER 19: TelevisionQUESTIONS:ANSWERS:The North American NTSC television system transmit _____30 framesframes per second, each consisting of _____ lines.525 linesA _____ interlace is used so that _____ fields are transmitted2:01per second.60 fieldsWhere does the vertical solutions depends?on the number ofscan linesWhere does the horizontal lines depends?on the maximum frequencythat can be transmittedComposite color videos uses two color signals modulated on a3.58 MHzsubcarrier at _____ using _____.DSBSC QUAMTerrestrial television broadcasting uses a channel _____ wide.6 MHzThe picture is transmitted using _____ with carrier, and thesound uses FM on separate carrier.VSB AM_____ and _____ travel together through the tuner and picturepicture, sound_____ of a television receiver.IF sectionThe sound is then converted to a separate _____ IF, in a systemknown as intercarrier sound.4.5 MHzColor receiver use ____________________ to retrieve thecolor signal.synchronous demodulationThe frequency and phase reference for the color _____ areprovided by a color burst on the black porch of the horizontaldemodulatorssynchronizing signal.The _____ used in television receivers generate an electronbeam that is intensity-modulated by the video signal and deflectedCRTshorizontally and vertically by coils that surround the tube.The beam produces an image by ______ coating on the tubestriking a phosphorface.Color CRTs use three electrons beams striking three differenttypes of phosporous that glow _____ , _____ , _____ .red, green, redCable- television systems reduces losses by moving UHF signalsto the _____ range.UHFThey use frequencies between channels _____ and ______and above channel _____ .6,7,13It is often possible to localize faults in television receivers bylooking for the presence, absence, or abnormality of the _____,raster, picture, color and_____, _____ and _____.soundonce the fault has been localized to one or more stages, thereare many types of specilized test _______ that can be used.equipmentA gradual transition is underway to ________ , both for standarddefinition television and for new high-definition systems.digital transmissionWhat do you call of the ratio of the width to the height of atelevision picture?aspect ratioWhat do you call of the portion of the horizontal blanking pulseafter the sync pulse?back porchWhat is the video level corresponding to zero luminance?black setupIt is the period of time when the electron beam in a CRT is cutoff.blankingWhat is a vacuum tube that uses a moving electron beam toCRTprodice patterns orimages on phosphorescent screen?cathode-ray tubeIt is the color signal.chrominace (chroma)It is several cycles of color subcarrier on the back porch of thehorizontal syn for color synchronization.color burstWhat do you call of the filter that can pass (or reject) a fundamen-tal frequency and its harmonics?comb filterIt is a video system in which color and luminace are sentseparately, without frequency interleaving.component colorIt is a video system in which luma, sync, and chroma signals(if present) are combined.composite videoIt is an alignment of the three electrons beams in a color CRTso that they land on the same triad of color phosphor dots.convergenceIt is the pulse in the vertical blanking interval of a video signalthat create interlaced scan.equalizing pulseIt is an interlaced video system, one-half of a frame,consistingof alternate lines.fieldOne complete image in a video system.frameIt is the portion of horizontal blanking pulse before the sync pulse.front porchIt is a television receiver design that uses miximg between thepicture and sound carriers to generate the sound intermediateintercarrier soundfrequency.What is a video scanning system that divides a frame into twofields, to reduce flicker?interlaceIt is the signal that provides brightness information in a videosystem.luminance (luma)What is the North American television standard?NTSC videoIt is the video level representing maximum luminace.peak whiteIt is the picture element.pixelWhat is the video system that does not use interlace?progressive scanIn a color CRT, the adjustment of the three electron beams sothat each lands on the phosphor dots of the appropriate color.purityIt is the pattern of scanning lines in a video system.rasterIt is the amount of detail produced by a video system.resolutionThe return of the electron beam in a CRT from right to left orfrom bottom to top.retraceIt is a color video system in which the three primary colors aretransmitted separately.RGB colorIt is the main accelarating element in a CRT.ultorIt is the portion of scanning lines in a video system that, onaverage, can be used in determining vertical resolution.utilization resolutionIt is a specialized oscilloscope designed for the observation ofcomposite color signals.vectorscopeIt is the assembly that contains the deflections coils and ismounted on the neck of a CRT.yoke

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