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NEHRU ARTS AND SCIENCE COLLEGE DEPARTMENT OF ELECTRONICS AND COMMUNICATION SYSTEM QUESTION BANK CLASS: II B.sc ELECTRONICS AND COMMUNICATION SYSTEM SUBJECT: TELEVISION ENGINEERING STAFF NAME: S. VENKATESAN TELEVISION ENGINEERING UNIT I TELEVISION STANDARDS Geometric form & Aspect ratio of the picture – Vertical scanning – Horizontal scanning – Number of scanning lines – Interlaced scanning – Vertical and horizontal resolution –negative modulation – Complete Channel bandwidth – Reception of VSD Signals – allocation of Frequency band for TV signal Transmission – Standards of TV System – Complete channel bandwidth – Composite video signal – CCIR – B standards – camera tubes. SECTION A 1.The normal aspect ratio of an Television picture is about ______ (1) 4/3 (2) 3/4 (3) 8/4 (4) 4/6 ________ pulses are transmitted along with the picture information to acheive exact 2 congruence. (1) Digital (2) Triggering (3) Synchronizing (4) Asynchronizing 3 The Storage Characteristics of the human eye is also named as ______ (1) Perception of Vision (2) Illusion (3) Persistence of Vision(4) None of these 4 In the present days, _____ still pictures of the scene are taken per second. (1) Twenty - two (2) Twenty - five (3) Twenty - SIX (4) Twenty - four 5 Normally the frame repetition rate is about ______ in most television systems. (1) 28 per second (2) 25 per second (3) 29 per second (4) 30 per second 6 The trace and retrace of several horizontal lines is named as an ______ (1) Horizontal - resolution (2) Vertical - Scanning (3) Vertical - resolution (4) Horizontal Scanning 7 The maximum rise in an scanning system is called as an ______ (1) Raster (2) Trace (3) Retrace (4) Flyback 8 _______ ensures exact correspondence in scanning and distortionless reproduction of the picture details. (1) Horizontal Scanning (2) Reliability (3) Vertical Scanning (4)LOW Reliability 9 The ability of the scanning beam to allow reproduction of electrical signals is based on _________ (1) Number of Scanning lines (2) Image resolution (3) Detail of an picture (4) None of these The total number of scanning lines that need to be employed is limited by the ______ of 10 the human eye. (1) Resolving capability (2) Resolution factor (3) image (4)None of these ______ is very annoying to the observer when the screen is made alternatively bright and 11 dark. (1) Image continuity (2) Flicker of light (3) Image perception(4) Image fidelity In television pictures an effective rate of ______ vertical scans per second is utilized to 12 reduce flicker. (1) 50 (2) 41 (3) 45 (4) 78 The process of Scaning from top to bottom and bottom to top without missing any single 13 lines is called as an ______ (1) Interlaced Scanning (2) Vertical Scanning (3) Horizontal Scanning (4) None of these In an television system, the total number of lines divided into two groups is called as an 14 _______ (1) Trace (2) Fields (3) Raster (4) None of these 15 The normal duration of the horizontal line in an scanning period is about _____ (1) 68 - microseconds (2) 64 - microseconds (3) 66 - microseconds (4) 50 - microseconds 16 The Resolution factor (k) is also named as an ______ (1) Kell factor (2) Real - factor (3) Image factor (4) Refractive index The frequency of the periodic wave which is minimum requirement in an TV - Systems is 17 about ______ (1) 9 MHz (2) 8 MHz (3) 5 MHz (4) 6 MHz 18 The normal resolution factor used in the television system is as about ____ (1) 0.89 (2) 0.79 (3) 0.59 (4) 0.69 The two major adjustments which is commonly used by the viewer in television system is 19 ____ & _____ (1) Brightness & Contrast (2) Dark & White (3) Sound & Power(4) Audio & Video ________ is the distance between the pedestal level and the average value (dc level) axis 20 of the Video signal. (1) Flicker (2) Interlace error (3) Pedestal height (4) None of these The Composite video signal contains ______ pulses to make the retrace invisible by 21 raising the signal amplitude during the scanning system. (1) Blanking (2) Asynchronizing (3) Triggering (4)Synchronizing The _______ is frequency modulated because of its inherent merits of interference - free 22 reception. (1) Video - signal (2) Wave - signal (3) Wove - signal (4) Sound - signal 23 In the case of picture tubes, an _____ produces a narrow beam of electrons for scanning. (1) Electron - beam (2) Ray (3) Electron - gun (4) Collision 24 A ______ may be called as the eye of a Television sysytem. (1) Camera tube (2) Picture tube (3) Display screen (4) None of these The normal duration of the horizontal line in an ___________period is about 64 micro 25 second. (1) scunning (2) scanning (3) scarred (4) filter SECTION B 1) Explain raster scan? 2) Explain Scan Lines? 3) Distinguish Signal modulation? 4)Define Interlaced scanning? 5)Define Standard-definition television? SECTION C 1)Explain television? 2)Describe the theory of Display resolution? 3)Explain about VSB? UNIT II TELEVISION RECEIVER SECTION Monochrome receiver block diagram – Receiving antennas – Balun – IF Filters RF tuners – VHF Stage and Response – Video detector – sound section – video amplifiers DC restoration – Picture tubes. SECTION A 1.VCA stands for_________ (1) Video CourseAnalysis (2) Video Content Analysis (3)Video Compute Analysis (4) Video Connect Analy 2 CRT stands for__________ (1) cathode rise tube (2) cathode ray tube (3) cathode raise tube (4) caro ray tube 3 vacuum tube containing an ________ (1) eltran gun (2) electron gule (3) electron gun (4) electron boom 4 In CRT internal or external means to accelerate and deflect the _________ (1) electron gun (2) electron beam (3) voltage beam (4)electron valve 5 The CRT uses an evacuated _________envelope (1) gold (2) silver (3) glass (4) plastic 6 UHF stands for _______ (1) Ultra high frequency (2) Extra high frequency (3) Ultemate high frequency (4) Ultra height frequency 7 VHF stands for_________ (1) Very height frequency (2) Very high frequency (3) Very humming frequency (4) none of these 8 HDTV stands for__________ (1) Height defenition TV (2) High defenition TV (3) High define TV (4) High delete TV 9 Analog television cards output a _________ video stream (1) rought (2) row (3) raw (4) right 10 A hybrid tuner has one tuner that can be configured to act as an _________ tuner (1) digital (2) analog (3) current (4) hybrite 11 Most TV tuners are limited to the __________frequencies (1) redio (2) radio (3) low radio (4) minimum radio 12 A radio receiver designed to amplify and convert the video and audio radio____________signals (1) voltage (2) frequency (3) current (4) none of these 13 In TV receiver,designer are usually designed with a ____________ circuit. (1) superhaterodyne (2) superheterodyne (3)superoheterodyno (4) none of these 14 The tuner selects the signals of the desired channel and converts them to a ____________ frequency within the intermediate-frequency passband. (1) lower (2) high (3) medium (4) fast 15 VIDAR stands for____________ (1) Video detection and raising (2) Video detection and ranging (3) Video done and ranging (4) Video detection and rastor 16 RADAR stands for___________ (1) Radio done and ranging (2) Radio detection and raising (3)Radio detection and ranging (4) Raise detection and ranging 17 Amp is an electronic device that ____________ the power of a signal. (1) decrease (2) increases (3) constant (4) none of these 18 Current amplifier – This amplifier changes an input current to a ___________output current. (1) meadium (2) reduce (3) larger (4) none of these 19 ____________ tuner card is a kind of television tuner (1) fan (2) radio (3) TV (4) light 20 TV tuner cards are most commonly __________bus expansion card (1) DCI (2) ACI (3) PCI (4) VCI 21 Tuner to adjust the resonance frequency of an __________ (1) voltage (2) current (3) antenna (4) phase 22 IF stands for___________ (1) intermediate frequency (2) internal frequency (3) involved frequency (4) none of these 23 intermediate frequency (IF) is a frequency to which a __________ frequency is shifted as an intermediate step in transmission or reception. (1) line (2) voltage (3) carrier (4) low 24 ADC stands for_________ (1) Amplitude to digital (2) Analog to Digital (3) Amplitude digital convertor (4) none of these 25 Analogue television receivers using system M: ___________ MHz (audio) and 45.75 MHz (video) (1) 41.29 (2) 41.25 (3) 31.25 (4) 41.35 SECTIONB 1) Explain Video Content Analysis? 2)Explain Sound TV ? 3)Define CRT? 4)Define amplifier? 5)Explain antenna? SECTION C 1)Explain types of Television antenna? 2)Draw TV-block-diagram? 3)Explain types of tuners? UNIT III SYNC SEPARATOR Sync separator – Basic principle – Noise in sync pulses – Vertical and horizontal sync separation – Automatic frequency Control (AFC) – Horizontal AFC – Vertical and horizontal output stage – EHT generation. SECTION A 1)phase detector means supplied with a _________synchronizing signal. (1) plane (2) vertical (3) horizontal (4) pline 2)horizontal deflection means for forming the ___________ signal . (1) high (2) input (3) output (4) low 3A horizontal AFC circuit comprising a phase detector circuit supplied with a ___________synchronizing signal. (1) vertical (2) horizontal (3) balun (4) simultaneous 4AFC stands for __________ (1) Automatic Find Control (2) Automatic Freely Control (3)Automatic Frequency Control (4) Automatic Frequency Compute 5In AFC,the bandpass frequency of a receiver is tuned to the frequency of a ____________. (1) receiver (2) transmitter (3) current (4) amplitude 6The AFC circuit in the receiver develops an ________ voltage proportional to the degree to which the receiver is mistuned. (1) error (2) correct (3) low (4) high 7Image synchronization is achieved by transmitting ___________-going pulses (1) low (2) positive (3) negative (4) high 8The horizontal sync signal is a single _________ pulse (1) arrange (2) absoulte (3) long (4) short 9In CRT,the circuit inductances to resonate at a much ________ frequency. (1) high (2) low (3) medium (4) abnormal 10The flyback transformer and rectifier circuitry into a single unit with a captive ____________lead. (1) output (2) input (3) 0 (4) 2 11television synchronous deflection circuit is generally comprised of a first power supply for supplying a __________ (1) A.C (2) D.C (3) A.CE (4) D.DC 12In Television synchronous deflection circuit,a first power supply circuit for supplying a D.C. voltage to the horizontal ________circuit. (1) CFC (2) DFC (3) AFC (4) defc 13Television synchronous deflection circuit,a second power supply circuit for smoothing the flyback pulse and for supplying a predetermined __________ voltage to the synchronous separator. (1) D.C (2) A.C (3) B.C (4) none of these 14AFC stands for__________ (1) Automatic frequency contract (2) Automatic frequency control (3) Automatic feiled control (4) Automatic fail control 15ATV stands for__________ (1) Analog tv (2) Amplitude tv (3) And gate tv (4) none of these 16Automatic Frequency Control (AFC), also called __________ (1) AFT (2) AUT (3) AET (4) ANT 17In AFC ,bandpass frequency of a receiver is tuned to the frequency of a ______ (1) transmitter (2) receiver (3) raceiver (4) none of these 18DTv stands for_____________ (1) Died TV (2) Digital Tv (3) Done TV (4) Dual TV 19AFC stands for______________ (1) Automatic frequency control (2) Aline frequency control(3) Automatic frequency contrast (4) none of these 20Analog signals vary over an infinite number of possible values which means that electronic noise and interference becomes reproduced by the ____________. (1) voltage (2) Transmitter (3) receiver (4) none of these 21Sound-in-Syncs is a method of ____________sound . (1) reducing (2) multiplexing (3) reflecting (4) none of thses 22In scanning ,each frame is actually scanned twice interleaving odd and __________lines. (1) low (2) even (3) high (4) none of these 23In scanning,Each scan is known as a ______________(odd and even fields.) (1) frame (2) field (3) line (4) none of these 24Normal TV video bandwidth is _________ MHz. (1) 7.0 (2) 6.0 (3) 5.0 (4) 8.0 25RF stands for___________ (1) Rase frequency (2) Rise frequency (3) Radio frequency (4)Range frequency SECTION B 1) Explain horizontal AFC circuit comprising? 2) Define horizontal AFC? 3) Write a note an Automatic Frequency Control? 4) Explain Sync Separator? 5) Describe the CRT flyback power supply design and operation principles? SECTIONC 1)Explain about Synchronization? 2)ExplainVertical synchronization? 3)Describe Horizontal hold and vertical hold? UNIT IV COLOUR TELEVISION Nature of color – Color perception – Compatibility – Three colour theories – Chromaticity diagram – Luminance and color difference signals – weighting factors – color picture tube – Bandwidth for color signal transmission – PAL Color TV systems- Block diagram of color TV Receiver SECTION A 1 Television (TV) is the most widely used ____________ for transmitting and receiving. (1) tept communication medium (2) telecommunication medium (3) tole communication medium (4) telecontact medium 2 The cathode ray tube (CRT) is a _________ tube containing an electron gun. (1) vacome (2) vocuum (3) vacuum (4) valcuum 3 The cathode ray tube (CRT) is a vacuum tube containing an electron gun (a source of electrons) and a _________ screen (1) floorescent (2) fluorescent (3) fluorescont (4) fluoroscent 4 The RGB color model is an additive color model in which red, green, and _____ (1) bolue (2) blui (3) blue (4) bloe 5 Visible light corresponds to a small range of the electromagetic spectrum roughly from _________ nm . (1) 800 (2) 300 (3) 500 (4) 400 6 SPD stands for ___________ (1) Spectral power distribution (2) Spectral power distorion(3) Spotra power distribution (4) Spectra power distribution 7 The color matching experiment is the basis for the design of _________ TV (1) Black (2) color (3) White (4) Red 8 Changing the wavelength of a monochromatic light changes the relative responses of the ________ cone types. (1) 2 (2) 4 (3) 3 (4) 5 9 Color opponency requires very specific wiring in the _____________. (1) ratina (2) retina (3) ritina (4) ratesh 10 Analog (or analogue) television is the __________ transmission. (1) voltage (2) current (3) digital (4) analog 11 Primary colors (or primary colours) are sets of colors that can be combined to make a useful range of ____________. (1) current (2) voltage (3) colours (4) none of these 12 human color vision is ______________. (1) trichromatch (2) trichromatic (3) Drichromatic (4)trichromo signal 13 The primary colors normally used are red, green, and __________. (1) white (2) yellow (3) blue (4) orange 14 Subtractive combination of colors, as in mixing of ____________. (1) picture (2) red (3) blue (4) pigments 15 RGB stands for______________ (1) red,glow,green (2) red,green,blue (3) red,gray,blue (4)none of these 16 Primary colors are not a fundamental property of _________ but are related to the physiological response of the eye to light. (1) colour (2) current (3) voltage (4) light 17 Media that combine emitted lights to create the sensation of a range of colors are using the ________color system. (1) additive (2) Addition multiplication (3) Addadive (4) none of these 18 Additive mixing of red and green light produces shades of yellow, orange, or __________. (1) brown (2) blue (3) white (4) majenta 19 The color space that is generated is called an __________color space. (1) RAB (2) RGB (3) RIB (4) rBB 20 CMY STANDS FOR_____________ (1) CYAN,MAJENTA,YELLOW (2) Cyan,Merun,Yellow (3)Cian,Merun,Yellow (4) CIAN,MEJENTA,YE LLOW 21 The Secondary colors are orange (mix of red and yellow), green (mix of blue and yellow), and__________(mix of blue and red). (1) white (2) purple (3) merun (4) brown 22 In Subtractive color theory,Primary colors are ______________________. (1) orange, cyan, and magenta (2) yellow, blue, and magenta (3)yellow, cyan, and magenta (4) none of these 23 A hue is a pure, spectral _____________. (1) values (2) density (3) colour (4) none of these 24 Color values range from low key (very dark) to __________ key (very light). (1) normal (2) abnormal (3) minimum (4) high 25 FCC Stands for__________________ (1) Faderal Communications Commission (2) Federal Communications Commission (3) Federal Communications Correct (4) none of these SECTION B 1) Write a note an PAL colour TV system? 2) Explain TV? 3) Explain cathode ray tube (CRT)? 4) Explain primary colours in TV? 5) With neatly explain Block diagram of color TV Receiver SECTION C 1)Briefly explain Color perception. 2) Briefly explain CRT flyback power supply design and operation principles. 3) Explain Three Colour Theory. UNITV UNIT V ADVANCE TECHNIQUES CCD camera – HDTV – Digital TV – Video Disc – Cable TV – Video Cassette Recorder. SECTION A 1 DTV stands for_________ (1) Digitol television (2) Dital television (3) Digital television(4) Depth television 2 DVR stands for______________ (1) digitol video recorder (2) digital video recorder (3) dital video recorder (4) depth videorecorder 3 PVR stands for ___________ (1) percept video recorder (2) personal vide recorder (3) perso video recorder (4) personal video recorder 4 CCTV stands for________ (1) Crrocetcircuit television (2) Closed-circuit television (3)Clo-circuit television (4) Closed-colese television 5 CA TV stands for___________ (1) Cable TV (2) Coble TV (3) Capt TV (4) Cobal TV 6 HDTV stands for ________ (1) High defenition TV (2) Hog defenition TV (3) Heght defenition TV (4) Hall defenition TV 7 LCD stands for___________ (1) Liquid craystal display (2) Liquid crys display (3) Liquid crystal display (4) Long crystal display 8 LED stands for__________ (1) Light emitting diode (2) Long emitting diode (3) Low emitting diode (4) Light emotion diode 9 SDTV stands for____________ (1) stand-definition television (2) standard-definition television (3) standard-delete television (4) stondarddefinition television 10 DTV stands for__________ (1) Digital TV (2) Died TV (3) Dull TV (4) Difine TV 11 VCR Stands for______________ (1) Video Correct Recorder (2) Video Cassette Recorder (3)Video Cassette Reduce (4) none of these 12 NTSC Stands for_________________ (1) Nice Television System Committee, (2) National Television System Contact (3) National Television System Committee,(4) Nutral Television Systematic Committee, 13 PAL Stands for____________ (1) Pulse Alternating Line (2) Phase Alternating Line (3) Phase Arrange Line (4) none of these 14 CCD Stands for_______________ (1) charge-contact device (2) change-coupled device (3)charge-coupled device (4) none of these 15 CCDs move charge between capacitive pins in the device, with the shift allowing for the transfer of _________ between pins. (1) change (2) charge (3) voltage (4) none of these 16 The CCD is a major piece of technology in ____________imaging. (1) pure (2) analog (3) digital (4) urrent 17 In a CCD for capturing images, there is a photoactive region (an epitaxial layer of silicon), and a transmission region made out of a ___________register. (1) shift (2) large (3) small (4) none of these 18 The photoactive region of a CCD is, generally, an epitaxial layer of _________. (1) oxide (2) aluminium (3) silicon (4) none of these 19 In CCD,Each square of four pixels has one filtered red, one blue, and __________green. (1) 4 (2) 3 (3) 2 (4) 1 20 EMCCD stands for___________ (1) elective-multiplying CCD (2) electron-multiplying CCD (3)electron-managing CCD (4) none of these 21 The videocassette recorder, VCR, or video recorder is an electromechanical device that records analog audio and analog video from broadcast ____________. (1) HDTV only (2) current (3) television (4) none of these 22 Most domestic VCRs are equipped with a television broadcast receiver (tuner) for _____________ reception. (1) current (2) TV (3) scanning (4) voltage 23 Digital television (DTV) is the transmission of audio and video by ____________ processed and multiplexed signal. (1) digitally (2) analog (3) voltage (4) none of these 24 DVB Stands for______________ (1) Digital Verswattile Broadcasting (2) Digital Video Broadcasting (3) Digital Video Black (4) none of these 25 DMB Stands for____________ (1) Digital Multimedia Brown (2) Digital Manage Broadcasting (3)Digital Multimedia Broadcasting (4) Dental Multimedia Broadcasting SECTION - B 1) Explain HDTV. 2) Explain digital video recorder (DVR). 3) Explain CCTV. 4) Define Cable television. 5) Explain Digital TV. .SECTION - C 1) Briefly explain HDTV. 2) Briefly explain function of Digital television. 3) Explain about Protection parameters for terrestrial DTV broadcasting. ALL THE BEST