1. Which of the following is the first component of any MATV system to receive broadcast signals?
6. What class of TV camera lens used to cover short distances?
a. Filter
a. Normal
b. LNA
b. Wide angle
c. RF amplifier
c. Telephoto
d. Antenna
d. Zoom
2. Is the most common technique where apartment house, hotels, schools, condominiums, and multiunit buildings distribute TV and FM signals to a number of receivers, using a single head-end.
7. What class of TV camera lens used to cover long distances?
b. Wide angle
c. Telephoto
d. Zoom
a. CCTV
b. CATV
c. MATV
d. Antenna
a. Normal
8. What is the local oscillator frequency in commercial AM broadcast if it is equal to 455 kHz?
3. TV channel 2, 4 and 5 belong to
a. 0 to 1500 kHz
a. Low band UHF
b. High band VHF
c. 540 to 1600 kHz
c. Mid band UHF
d. 955 to 2055 kHz
d. Low band VHF
4. A mechanism or device which enables the TV camera to move in lateral and tilting motion
a. Panning device b. Scanner
c. Tilting
d. Pan/tilt device
5. Which of the following is a solid state imaging device?
9. What is the allowable deviation ratio of commercial FM broadcast?
a. 20
b. 75
c. 5
d. 25
10. The maximum power suggested by KBP on 919-1312 AM broadcast station in Metro Manila is
a. VIDICON b. ICONOSCOPE
c. Charge couple device
d. CCTV
b. 0 to 455 kHz
a. 5 kW
b. 10 kW
c. 15 kW
d. 20 kW
11. KBP radio code mandates mand ates that station must provide a minimum of ___ minutes
a. 30
b. 45
c. 50
a. 3.8 MHz
b. 6.8 MHz
c. 7.8 MHz
d. 8.8 MHz
13. What is the frequency tolerance of an FM Radio Broadcast station?
a. ± 20000 Hz b. ± 20 Hz
c. ± 200 Hz
d. ± 2000 Hz
14. The minimum frequency separation between frequency of AM broadcasting station
a. 9 kHz
b. 18 kHz
c. 36 kHz
d. 72 kHz
15. The aspect ratio HDTV is
a. 1
b. 2
c. 3
d. 4
d. 60
12. What is the chroma subcarrier signal frequency for color television?
16. A newscast is a distinct unit of a program with a minimum news content of _____ minute(s) excluding intro, extro, headline and commercial load
a. 4:3
b. 18:5
c. 14:8
d. 16:9
17. In accordance with existing ex isting provision of law and the KBP rules and the regulations, all stations shall actively promote the growth ands the development of Filipino music by playing _____ OPM every clock hour.
a. 1
b. 2
c. 3
d. 4
18. Commercial load for radio shall not exceed ex ceed ____ minutes for a one-hour program outside Metro Manila
a. 15
b. 20
c. 25
d. 30
19. Commercial load for radio shall not exceed _____ minutes for a one-hour program outside Metro Manila.
a. 15
b. 16
c. 17
d. 20
20. Program interruption for airing of commercial in Metro Manila shall not exceed _____ breaks in every program hour
a. 5
b. 6
c. 7
d. 8
21. Program interruption for the airing of commercial outside Metro Manila shall not exceed _____ breaks in every program hour
25. _____ is the time circulation for one horizontal trace
a. 52 us
b. 62 us
c. 48 us
d. 50 us
26. Listing of the date and time of events, programs, equipment, tests, malfunctions and corrections in communications system.
a. 5
b. 6
c. 7
d. 8
22. For Metro manila, the classification of prime time blocks for FM shall be
a. 6:00 AM to 8:00 PM
b. 6:00 AM to 12:00 NN
c. 6:00 AM to 6:00 PM
c. Log
d. File
27. Which of the following is not a low impedance microphone?
b. Velocity
c. Condenser
d. Crystal
28. Facsimile permits remote duplications of which of the following items?
a. 6:00 AM to 8:00 PM
b. 6:00 AM to 12:00 NN
a. Dynamic
d. 12:00 NN to 12:00 MN
23. For provincial station, the classification of prime time blocks for FM radio shall be
b. Documentation
a. Reporting
c. 6:00 AM to 6:00 PM
a. Map b. Pictures
c. Printed page
d. All of these
d. 12:00 NN to 12:00 MN 29. Television has a lot of features in common co mmon with
24. All airtime classifications shall be submitted to and subject for approval by the
a. NTC
b. KBP-SA
c. DOTC
d. CCITT
a. FM stereo b. Telephone service
c. Motion picture
d. Magazine
30. The major component of the TV signal waveform is the
a. Video
b. Radar
c. Stereo
d. Antenna
35. What is the vertical blanking pulse rate?
a. 30 Hz
b. 60 Hz
c. 15.75 Hz
d. 120 Hz
36. The pulses riding on the vertical blanking pulse 31. For NTSC TV system, the image is scanned from
a. Top to bottom
b. Left to right
c. Right to left
d. Choices A and B above
32. One completes NTSC scanning cycle called field consists of how many lines
a. Equalizing (sync) pulses b. Serrated vertical sync pulses
c. Black level pulses
d. Choices A and B above
37. Television camera pickup tube is called
a. Vidicon b. Image orthicon
a. 500
c. Plumbicon
b. 525
d. All of the above
c. 625
d. 60
33. The field rate in the NTSC television system
a. 30 Hz b. 120 Hz
c. 60 Hz
d. 15.75 Hz
34. What is the horizontal synchronous blanking pulse rate?
a. 30 Hz
b. 60 Hz
c. 15.75 Hz
d. 120 Hz
38. The television picture tube magnetic fields can be used for
a. Beam focusing b. Beam deflection
c. Beam production
d. Beam modulation
39. What is the purpose of an indirectly-heated cathode in a cathode ray tube?
a. Beam focusing b. Beam deflection
c. Beam production
d. Beam modulation
40. Video modulation for television is
45. Brightness of an image is known as
a. Amplitude modulation
b. Frequency modulation
c. Vestigial sideband d. Both amplitude modulation and vestigial sideband
41. Audio modulation for television is
a. Radiance b. Chrominance
c. Reflectance
d. Luminance
46. The colors at the vertices of the color triangle are referred to as
a. Amplitude modulation
b. Frequency modulation
c. Vestigial sideband
c. Desaturated
d. All of the above
d. Both amplitude modulation and vestigial sideband
42. What is the maximum frequency deviation for fo r audio modulation in TV transmission? a. 25 kHz
b. 30 kHz
c. 50 kHz
b. White
47. A color signal which originate in the camera itself with color television pickup?
a. Primary
a. Red b. Green
c. Blue
d. All of these
d. 75 kHz
43. The video carrier and the audio carrier are separated by ____ MHz.
a. 4.5
b. 5.5
c. 6.5
d. 7.5
48. What are the three separate signals derived from a matrix in a color TV transmitter?
a. Y, I and Q
b. P, D and Q
c. M, N and O
d. R, S and T
49. Range of a VHF television tele vision transmitter 44. In a practical image scanned at the NTSC rate, the spectrum will include components clustered at the fundamentals and harmonics of _____ kHz
a. 15.75
b. 30
c. 12.25
d. 45.5
a. 54 – 98 98 MHz
b. 54 – 54 – 216 216 MHz
c. 54 – 128 128 MHz
d. 54 – 166 166 MHz
50. Range of a UHF television transmitter
a. 470 – 670 MHz
b. 470 – 770 MHz
c. 470 – 890 MHz
d. 470 - 980 MHz
51. What is the approximate bandwidth occupied by the chrominance video signal for color TV?
a. 0.8 MHz
b. 1.8 MHz
c. 8.1 MHz
d. 1.6 MHz
55. _____ is the most effective filter for separating luminance and chrominance frequency components.
a. Low pass
b. Band pass
c. Notch
d. Comb
56. The chrominance processing circuits can be deactivated when monochrome broadcasts are received by the
52. The colors found around the perimeter of the color triangle are said to be
a. Saturated
c. NOT gate
d. All of the above
57. What is the standard video level, in percent PEV, for blanking?
b. Dark c. Light
d. Monochrome
53. At what position on the color triangle will saturated yellow be located?
a. Between red and blue
b. Between red and green
d. 75 %
58. What is the percent video level, in percent PEV, for black?
c. Between blue and green d. At the center
54. What is the phase difference between the I and Q color signal carriers?
a. 0°
d. 70 %
59. What is the standard video level, in percent PEV, for white?
b. 45° c. 60° d. 90°
b. 25 % c. 12.5 %
a. 0 %
b. 0 % c. 12.5 %
a. 25 %
b. SAW filter
a. Color killer
a. 0 %
b. 12.5 %
c. 25 %
d. 70 %
60. One should first perform _____ before a convergence setup is performed.
65. Where is the operating position of a radio station?
a. Gray tracking
a. On the bridge
b. Screen setting
b. At the control point
c. Alignment
c. At the location of the receiver
d. Degaussing
d. At the location of the transmitter
61. If there are too many harmonics, one should check the
a. Coupling b. Tuning of circuits
66. The alignment of the three color guns to a common point is known as
a. Blooming b. Confetti
c. Shielding
c. Demodulation
d. Any of these
d. Convergence
62. In transmitter amplifier design, an even-order harmonics can be prevented or reduced by
a. Using a push-pull amplifier
b. Operating class C
c. Operating class AB
d. All of these
63. The vertical and horizontal pulses are separated at the
a. Sync separator
b. AFC
c. High voltage
d. AGC
64. The reason why buffer stage is included in a transmitter is to
a. Present a constant load to the oscillator stage
b. Present a low impedance to the oscillator stage c. Stop the oscillator from generating parasitic oscillations d. All of these
67. A _____ is equivalent to 525 scanning lines
a. Field
b. Frame
c. Cycle
d. Interface set
68. A _____ represents one set of 262 ½ scanning lines
a. Field
b. Frame
c. Cycle
d. Interface set
69. The number of scanning lines is _____ per second
a. 14750
b. 15570
c. 15750
d. 16550
70. Picture frames are repeated at the rate of _____ per second
75. What is emission A3F?
a. 25
b. 30
c. 40
d. 50
a. RTTY b. SSB
c. TV
d. Modulated CW
76. What is emission F3F? 71. Lack of raster is an indication of no
a. AGC
b. High voltage
c. Video signal
d. Television signal
72. The sound and video signals are separated at the _____ of the TV receiver
a. IF stage
b. Video amplifier
c. Video detector
d. Burst separator
73. The presence of color bars is an indication that there is a problem in the _____ circuit
a. Horizontal
b. Reactor
c. Burst separator
d. Chroma amplifier
74. Type of emission produced when a frequency modulated transmitter is modulated by a TV signal
c. Television
d. RTTY
77. Cause of slow rising white “hum bars” is the television
a. A3F
b. F3F
c. A3C
d. F3C
a. Pad filter
b. Bad rectifier
c. Bad picture tube
d. High voltage transformer
78. Adjusting the _____ may eliminate color confetti
a. Color chroma amplifier
b. Color killer
c. Color detector
d. Color oscillator
79. Video signal amplitude determine the picture quality called
b. Modulated CW
a. Facsimile
a. Chrominance b. Brightness
c. Contrast
d. Luminance
80. Part of broadcast day from midnight to local sunrise
85. Which of the following filters block FM radio band for TV channels (2 to 13)?
a. Daytime
a. High-pass filter
b. Experimental
b. Low-pass filter
c. Nighttime
c. Band pass filter
d. Dawntime
d. Band-reject filter
81. Part of broadcast day from local sunset to local sunrise
86. The FM broadcast band is from
a. Dawntime
b. Nighttime
c. Daytime
d. Experimental
82. What causes snow in television?
a. High Q in the tuned circuit b. Excessive gain
a. 535 to 1600 kHz b. 30 to 300 kHz
c. 88 to 108 MHz
d. 300 to 2000 MHz
87. The type of emission used by standard AM radio broadcast
a. A5C
b. A0
c. Random noise in the signal
c. A3
d. Insufficient wave traps
d. F3
83. Vestigial sideband is known as _____ type of emission
88. The standard AM radio broadcast belongs to which frequency band?
a. CF3
b. C3F
c. B8E
c. VHF
d. A3E
d. LF
84. Vestigial sideband modulation is commonly used in
a. TV broadcasting
b. Monaural broadcasting
a. MF
b. HF
89. When were UHF channels (14 – 83) of television added?
a. 1902
b. 1945
c. Stereo broadcasting
c. 1947
d. HF point-to-point communications
d. 1952
90. When was colored TV standards established in the United States?
95. Standard AM broadcasting use _____ for greater and efficient coverage
a. 1904
b. 1945
c. 1953
d. 1960
91. What synchronizes the horizontal line of the TV picture tube?
a. Circular polarized wave antenna b. Horizontal polarized wave antenna c. Both vertical and horizontal polarized wave antenna d. Vertical polarized wave antenna
96. Receiver sensitivity means
a. HFC
b. HSC
a. The frequency allocation of the system b. Input impedance of the receiver
c. HAFC
c. The ability of picking up weak signal
d. All of these
d. The power to deliver the information
92. A measure of how well the receiver can respond to every weak signals/
97. The main functions of the RF amplifier in a superheterodyne receiver is to
a. Selectivity
b. Sensitivity
c. Fidelity
d. Quality factor
93. What is the allowable frequency deviation of a commercial FM broadcast band?
a. 15 kHz
b. 75 kHz
c. 5 kHz
d. 100 kHz
94. The final amplifier of either FM or AM transmitter is operated as
a. Class A
b. Class B
c. Class C
d. Class D
b. Permit better adjacent-channel rejection c. Improve the rejection of the image frequency
d. All of these
98. Local oscillator of a broadcast receiver always tunes to a frequency higher than the incoming frequency in order
a. Provide improved tracking
a. To help the image frequency rejection b. To allow easy tracking c. To allow adequate frequency coverage without switching
d. All of these
99. Type of filter used in TV receivers that separates the chroma signal from the colorplexed video signal but leaves intact the Y-component
a. Comb filter
b. Bandpass filter c. Color filter
d. Low pass filter
100. What is the first letter-symbol for emission of unmodulated carrier?
b. N
c. H
d. F
101. The channel for cable TV frequency range of 5.75 to 11.75 MHz
b. Rec 407-4
c. Rec 408-5
d. Rec 450-1
106. CCIR transmission standards for FM sound broadcasting at VHF
a. Rec 601.2
b. Rec 501.2
c. Rec 500.4
d. Rec 450.1
b. T-8 c. 2
d. 3
102. The frequency range for cable TV channel T13
a. Rec 265-6
a. T-1
a. A
105. CCIR standards for the internal exchange of programmes on film for television used
a. 23.75 – 29.75 MHz
107. ISO Rec 23 in 1976 is the standard for
b. 60 – 66 MHz
c. 41.75 – 47.55 MHz
d. 5.75 – 11.75 MHz
103. Channel 8 frequency range allocation in cable TV
a. 54 – 60 MHz
b. 66 – 72 MHz
a. Recorded characteristics for magnetic sound records on full cost 16 mm motion picture film b. Projector usage of 16 mm motion picture films for direct front projector c. Camera usage of 35 mm motion picture film
d. Camera usage of 16 mm motion picture film
108. International broadcasting (short wave) uses frequency between _____ accordance with international agreements
c. 180 – 186 MHz
a. 7012 and 26100 kHz
d. 204 – 210 MHz
b. 6409 and 26100 kHz
104. The _____ of a television system is a measure of its ability to delineate picture detail
c. 5950 and 26100 kHz
d. 10950 and 26100 kHz
109. Which of the following station below is a regional channel?
a. Contrast
b. Resolution
c. Hue
a. Class I-A
d. Pixels
b. Class II-D
c. Class III-B
d. Class IV
110. The permissible power in kW of station II-A during nighttime is
a. 0.25 – 50
b. 10 – 50
c. 1 – 5
d. None of these
111. The television frequency which are now allocated to the land mobile services
b. 800 and 806 MHz
c. 668 and 674 MHz
d. 776 and 782 MHz
112. Numerical frequency band designation of channel 9
a. 488 – 494 MHz
b. 530 – 536 MHz
c. 632 – 638 MHz
d. 186 – 192 MHz
113. Cable TV systems originate from
a. DME
b. LPTV
c. HDTV
d. ITFS
116. Three stations are licensed to eligible educational entities for the distribution of program material to students enrolled in instructional curricula
a. 806 and 192 MHz
115. A station similar to a translator station in terms of equipment and service area but is permitted to originate programming from virtually any source
a. Germany
c. HDTV
d. ITFS
117. ITFS means
a. International Television Frequency Standard b. Instructional Telephone Frequency Service c. Instructional Television Fixed Service
d. International telecommunications Frequency Standard
118. MDS means
b. Dallas, Texas c. Pennsylvania
d. Japan
114. A term applied to third and higher order products, which can greatly degrade the performance of a system
b. LPTV
a. Translator
c. Field strength
d. Noise
b. Multipoint Digital Service
c. Maritime Data Standards
d. Multipoint Drop Standards
119. Direct broadcast satellite based allocation
a. Composite triple beat
b. Single dual mode
a. Multipoint Distribution Service
a. 12.2 – 12.7 GHz downlink
b. 17.3 – 17.8 GHz for uplink
c. 3.7 – 4.2 GHz for downlink
d. 12.2 – 12.7 GHz for downlink and 17.3 – 17.8 GHz for uplink
120. What is the channel number of an FM station with 88.1 MHz carrier?
a. 201
b. 202
c. 203
d. 204
121. What is the carrier frequency of an FM station with channel number of 300?
a. 107.5 MHz
b. 101.1 MHz
c. 107.9 MHz
d. 99.5 MHz
125. The ultimate Dolby surround system is the
a. Dolby NR
b. Dolby Prologic
c. dBx
d. hall matrix
151. In the sawtooth waveform for linear scanning the
122. If an FM station has an effective radiated power of 100 kW then it is under what class?
a. Class A
b. Class B
c. Class C
d. Class D
123. The video signal amplitude determines the quality of the picture otherwise known as
b. Luminance c. Chrominance
d. Contrast
124. _____ is defined as to “send out in all direction”
a. Broadcast
b. Complete cycle includes trace and retrace
c. Sharp reversal in amplitude produces trace d. Beam moves faster during trace than retrace
152. With vertical retrace time of 635 us, the number of complete horizontal lines scanned during vertical flyback is
a. 10
b. 20
c. 30
d. 63
153. One-half line spacing between the start positions for scanning even and odd fields produces
a. Hue
a. Linear rise is for flyback
a. Linear scanning b. Linear pairing
c. Fishtailing
d. Exact interlacing
154. In facsimile transmission, if the drum diameter is 60 mm and scanning pitch is 0.1 mm, calculate the index of cooperation using IEEE recommendation.
b. Announce
c. Media
d. All of these
a. 1885
b. 600
c. 1900
d. 984
155. In the interlaced frame, alternate lines are skipped during vertical scanning because the
159. Sawtooth generator circuits produce scanning raster, but the sync pulse are needed for
a. Linearity
b. Timing
c. Keystoning
d. Line pairing
a. Trace is slower than retrace b. Vertical scanning frequency is doubled from the 30-Hz frame rate to the 60-Hz field rate
c. Horizontal scanning is slower than vertical scanning d. Frame has the aspect ratio of 4:3
156. With ten percent for horizontal flyback, this time equals
160. Which of the following frequencies is wrong?
a. 10 us b. 5 us
c. 6.4 us
d. 83 us
a. Line pairing indicates poor interlacing b. People will look tall and thin on square raster on the picture tube screen c. A person can appear to have one shoulder wider than the other because of nonlinear horizontal scanning d. The keystone effect produces a square raster
a. 6 half lines or 3 lines
b. Three half lines
c. Five lines
d. Five half lines
c. 31, 500 Hz for equalizing pulses and serrations in the vertical sync pulse d. 31, 500 Hz for the vertical scanning frequency
a. Average carrier level b. Symmetrical envelope of amplitude variations
c. Lower sideband without upper sideband d. Upper envelope without the lower envelope
162. Which of the following statements is true?
158. The width of a vertical sync pulse with its serrations includes the time of
b. 60 Hz for vertical sync and scanning
161. The modulated picture carrier wave includes the composite video signal as the
157. Which of the following is not true?
a. 15, 750 90 Hz for horizontal sync and scanning
a. Negative transmission means the carrier amplitude decrease for black b. Negative transmission means the carrier amplitude decreases for white
c. Vestigial sideband transmission means both upper and lower sidebands are transmitted for all modulating frequencies d. Vestigial sideband transmission means the modulated picture carrier signal has only the upper envelope
163. With 2 MHz video signal modulating the picture carrier for channel $ (66 to 72 MHz), which of the following is transmitted?
a. 66- MHZ carrier and 68-MHz upper side frequency b. 71.75 MHz carrier, with 69- and 73- MHz carrier c. 67.25-MHz carrier, with 65.25- and 69.25- MHz side frequencies d. 67.25 MHz carrier and 69.25 MHz upper side frequency
164. With 0.5 MHz video signal modulating the picture carrier,
167. With 7% black setup, maximum black in picture corresponds to what percent amplitude in the modulated carrier signal?
a. 5
b. 68
c. 75
d. 95
168. Line-of-sight transmission is a characteristic of propagation for the
a. Both upper and lower side frequencies are transmitted
b. Only the upper side frequency is transmitted c. Only the lower side frequency is transmitted d. No side frequency are transmitted
165. In all standard television broadcast channels he difference between picture and sound carrier frequencies is
a. 0.25 MHz
b. 1.25 MHz
a. VHF and UHF bands
b. VHF bands but not the UHF band c. Low radio frequencies below a MHz d. AM picture signal but not the FM sound signal
169. In channel 14, 3.58 MHz color signal is transmitted at the frequency of
a. 471.25 MHz
b. 473.25 MHz
c. 474.83 MHz
d. 475. 25 MHz
170. The difference between the sound carrier and color subcarrier frequencies is a. 4.5 MHz
c. 4.5 MHz
d. 6 MHz
b. 1.25 MHz
c. 0.92 MHz
d. 0.25 MHz
166. The difference between sound carrier frequencies in two adjacent channels equals
a. 0,25 MHz
b. 1.25 MHz
171. Brightness variations of the picture information are in which signal?
c. 4.5 MHz
d. 6 MHz
b. Q
c. Y
d. R-Y
a. I
172. The hue 1800 out of phase with red is
a. Cyan
c. Green
d. Blue
173. Greater peak-to-peak amplitude of the 3.58MHz chrominance signal indicates more
a. White b. Yellow
c. Hue
d. Saturation
174. The interesting beat frequency of 920 kHz is between the 3.58-MHz color subcarrier and
b. Yellow
a. 4.5- MHz intercarrier sound
b. Picture carrier
c. Lower adjacent sound
d. Upper adjacent picture
d. A full saturated color is mostly white
a. Red
b. Yellow
c. Green
d. Blue
179. What is the hue of the color 90 degrees leading sync burst phase?
a. Yellow
b. Cyan
c. Blue
d. Orange
180. The average voltage value of the 3.58 MHZ modulated chrominance signal is
a. Red
c. A three-gun picture tube can serve as a matrix
178. The color with the most luminance is
175. The hue of color sync phase is
b. The transmitter matrix output includes Y, I and Q video
a. Zero for most colors b. Close to black for yellow
b. Cyan
c. The brightness of the color
c. Blue
d. The saturation of the color
d. Yellow-green
176. Which signal has color information for 1.5 MHz bandwidth?
181. The IF value for the color in receivers, for any station, is
a. 0.5 MHz b. 1.5 MHz
a. I
b. Y
c. 3.58 MHz
d. 4.5 MHz
c. R - Y
d. B – Y
177. Which of the following is false?
a. I video hues are orange or cyan
182. If the 3.58 MHz C amplifier in the receiver does not operate, the result will be
a. No color
b. No red
c. Too much blue
d. Too much yellow
183. Which of the following is not tuned to 3.58 MHz?
a. Burst amplifier
b. Video preamplifier
c. Chroma amplifier
d. Color demodulator input
184. When B – Y and Y signal are combined, the result is
d. Green video
185. The phase angle between B – Y and R – Y is
d. 90°
186. Which of the following applies for a monochrome program?
c. Chroma bandpass amplifier
d. R – Y demodulator
189. If the color oscillator does not operate, the result will be
a. No picture
b. No color
c. Incorrect hues
d. No color sync
190. The hue of the color sync burst phase is
a. Red
b. Blue
c. Magenta
d. Yellow-green
191. The balance for Y video signals to the three guns in the picture tube is set by the
a. Drive controls
b. Contrast control
c. Screen control
d. Color control
b. Y video amplifier off c. Color killer on
d. Picture tube off
187. The manual color control is generally in which circuit?
a. Chroma amplifier on
b. Y video output
b. 57° c. 0°
a. 180°
a. Red video output
b. 3.58 MHz chroma c. Red video
a. Blue video
188. The contrast control is generally in which circuit
192. The voltage wave shape in the output of the vertical amplifier is a
c. Chroma bandpass amplifier
d. R – Y demodulator
b. Sawtooth
c. Rectangle
d. Square
a. Red video output b. Y video output
a. Trapezoid
193. An auto transformer in the vertical output circuit
a. Steps up voltage for the scanning coils b. Isolates the scanning coils for B+ voltage in the primary c. Isolates the oscillator and output stages d. Does not isolate the secondary from dc voltage in the primary
194. Vertical flyback pulses at the plate of the vertical output tube are for retrace blanking at the picture tube
198. Which stage is not necessary for producing horizontal output?
a. Horizontal oscillator
b. Horizontal amplifier
c. Damper
d. Horizontal AFC
199. The frequency of the sawtooth current in the horizontal amplifier is
a. Cathode
b. Control grid
c. Screen grid
d. Anode
195. The top of the picture is stretched with too much height. To correct this
a. Vary the vertical hold control b. Reduce height with the vertical linearity control
c. Increase height with the size control
d. Replace the vertical oscillator tube
196. Peak-to-peak sawtooth scanning current in the vertical coils can be
a. 0.7 mA
b. 0.7 A
c. 50 A
d. 150 uA
197. A push-pull amplifier in the vertical output circuit
a. Usually operates class C
b. Can use PNP and NPN transistor
c. Cannot be used
d. Generally uses two beam-power pentodes
a. 60 Hz
b. 10500 Hz
c. 15750 Hz
d. 70 kHz
200. When the horizontal amplifier is conducting peak plate current, the electron scanning beam is at the
a. Left edge of the raster
b. Right edge of the raster
c. Center of trace
d. Center of flyback
201. One of the following processes or system best describe an example of a pilot tone system normally use in commercial broadcast FM stations.
a. Time division b. Frequency division
c. Stereo multiplex
d. QSK
202. What is the maximum transmitting power permitted an amateur station in beacon operation?
a. 10 W PEP output
b. 100 W PEP output
c. 500 W PEP output
d. 1500 W PEP output
203. What kind of emission would your FM transmitter produce if its microphone failed to work?
a. An unmodulated carrier
b. A phase modulated carrier
c. An amplitude-modulated carrier
d. A frequency modulated carrier
204. The main function of the RF amplifier in superheterodyne receiver is to
a. Provide improved tracking b. Permits better adjacent channel rejection c. Improve the rejection of the image frequency
d. All of these
205. Local oscillator of a broadcast receiver always tunes to a frequency higher than the incoming frequency in order
c. 5950 and 26100 kHz
d. 10950 and 26100 kHz
208. Which of the class station below is a regional channel?
a. Class I-A
b. Class II-D
c. Class III-B
d. Class IV
209. The permissible power in kW of stations II-A during nighttime is
a. 0.25 - 50
b. 10 - 50
c. 1 - 5
d. None of these
210. A term applied to third and higher order products, which can greatly degrade the performance of a system
a. To help the image frequency rejection b. To allow easy tracking c. To allow adequate frequency coverage without switching d. All of these
206. What is the first letter symbol for emission of unmodulated carrier?
a. A
b. N
c. H
d. F
207. International broadcasting (short wave) uses frequency between _____ in accordance with international agreements.
a. 7012 and 26100 kHz
a. Composite triple beat
b. Single dual mode
c. Field strength
d. Noise
211. A station similar to a translator station in terms of equipment and service area, but is permitted to originate programming from virtually any source
a. DME
b. LPTV
c. HDTV
d. ITFS
212. MDS means
b. 6409 and 26100 kHz
a. Multipoint Distribution Service
b. Multipoint Digital Service
c. Multipoint Data Standard
c. Stereo multiplex
d. Multipoint Drop Standards
d. QSK
213. What is the channel number of an FM station with 88.1 MHz carrier?
218. What type of emission is produced when a frequency modulated transmitter is modulated by a facsimile signal?
a. 201
b. 202
c. 203
d. 204
c. A3C
d. F3C
214. If an FM station has an effective radiated power of 100 kW then it is under what class?
a. Class A
b. Class B
c. Class C
d. Class D
215. What is the range of an AM broadcast frequency tolerance above or below its assigned frequency?
a. A3F b. F3F
219. What is the highest assigned carrier frequency for standard AM broadcast?
a. 107 kHz
b. 535 kHz
c. 540 kHz
d. 1600 kHz
220. One of the following refers to the standard frequency band limits of AM broadcast band.
a. 25 kHz
a. 30 - 300 MHz
b. 20 Hz
b. 88 - 108 MHz
c. 60 kHz
c. 3 - 30 MHz
d. 120 kHz
d. 535 - 1605 kHz
216. What type of emission is produced when amplitude modulated transmitter is modulated by a television signal?
221. What do you call the service area of a standard AM broadcast where fading is not allowed?
a. A3F
b. F3C
c. F3F
d. A3C
217. How would you best describe an example of a pilot tone system used in commercial frequency modulation broadcast radio stations?
a. Frequency simplex b. Time division
a. Secondary b. Tertiary
c. Primary
d. Experimental
222. In basic transmitter, ____ is a kind of transmitter that develops type B emission.
a. Arc
b. Spark
c. Alexanderson
d. High end
223. High speed network as defined by the NTC memorandum circular are network in ICT that have a capacity of at least _______.
a. 2.048 Mbps
b. 3.048 Mbps
c. 20.48 Mbps
a. Television b. Broadcasting in 535-1606 kHz
c. Single side band HF transmission
d. Television Audio
225. What frequency standard can be used to calibrate the tuning dial of the receiver?
d. Secondary service area
228. Where does the FM broadcast band located in the spectrum band?
a. ELF band
b. UHF band
c. HF band
d. WHF band
d. 5.05 Mbps
224. Type of radio communication transmission utilizing frequency modulation technique
a. A sweep generator b. A deviation meter
229. What is the reason why Frequency modulation is used in the broadcast video recording on tape?
a. High capacity
b. Low noise
c. Compressed bandwidth
d. Faster recording
230. As part of the KBP Technical Requirement for FM which polarization was not recommended for use?
a. Horizontal
b. Vertical
c. A calibrated voltmeter
c. Circular
d. Signals from WWV and WWVH
d. Elliptical
226. In stereo FM, a 38 kHz subcarrier is used for the L-R signal. It is derive from a pilot subcarrier of
a. 9.5 kHz
231. Antenna current, as specified in KBP definitions, is defined as a condition of
a. No modulation
b. 38 kHz
b. 80% modulation
c. 19 kHz
c. 85% modulation
d. 76 kHz
d. 100% modulation
227. An area characterized to have no interference but with fading or intermittent variations in intensity is ___.
a. Primary service area b. Intermediate service area c. Tertiary service area
232. ABS-CBN’s DXAB medium frequency broadcast station operates in …
a. Luzon
b. Visaya
c. Mindanao
d. Manila
233. International broadcast stations…
a. Broadcast on shortwave frequencies between 5.95 MHz and 26.1 MHz
b. Can be operated by both government and private entities c. Has transmissions which are intended to be received directly by the general public in foreign countries d. Is licensed by the NTC only when operated by private entities
234. Two FM broadcast stations are in Quezon City and another in Manila proper may be authorized to operate with a frequency separation less than 800 kHz.
a. True
b. False
c. Cannot tell
d. Sometimes
235. For Philippines AM broadcasting, according to standards, the maximum allowed modulation for satisfactory operation
237. Which broadcast parameter of the primary FM station is allowed to be changed in the operation of FM broadcast translator?
a. Frequency b. Power
c. Information content
d. A and B
238. Input power, as defined by KBP, in the product of the voltage and current at the output of the last radio stage, measured…
a. At 85 % modulation
b. Without modulation
c. At 90% modulation
d. At 100% modulation
239. In determining an antenna’s height above average terrain (HAAT), how many radial directions from the site are involved in the computation?
a. 4
b. 8
a. 75%
c. 12
b. 85%
d. 16
c. 90%
d. 100%
236. A third symbol radio emission represents telephone transmission including sound broadcasting.
a. W
b. F
c. C
d. E
240. If DZFE 89.7’s antenna height above average terrain (HAAT) is 190 feet, what is the depression angle of the radio horizon?
a. 0.17°
b. 0.21°
c. 0.27°
d. 0.31°
241. The method of generating FM used by broadcasting station is
a. Direct b. All of these c. Indirect
d. Insertion
242. The maximum power suggested by KBP on 919-1312 AM broadcast station in Metro Manila
247. The frequency spectrum of the stereophonic FM signal.
a. 10 kW
b. 20 kW
c. 15 kW
d. 5 kW
243. Production of radiation by transmitting station
d. Transmission
244. A form of single emission where the degree of carrier suppression enables the carrier to be reconstituted and be used for demodulation.
a. Half carrier single sideband emission
b. Full carrier single sideband emission
c. Reduced carrier single sideband emission
d. Double sideband emission
245. When does a broadcast station conduct an equipment test?
c. 19 kHz – 38 kHz
d. 30 kHz - 53 kHz
248. What is the maximum color TV bandwidth?
a. 1.6 MHz
b. 0.5 MHz
c. 1.5 MHz
d. 1.3 MHz
b. Emission
c. Radiation
a. During day time b. At any time
c. During night time
d. During experimental period
b. 59.5 kHz – 74.5 kHz
a. Monitoring
a. 67 kHz
249. A beam antenna has a height of 10 meters over a service area. Determine the beam tilt angle.
a. 0.088°
b. 8.8°
c. 9.2°
d. 0.9°
250. Listing of the date and time of events, programs, equipment, test, malfunctions, and corrections in communication system.
a. File b. Documentation
c. Reporting
d. Log
251. In stereophonic broadcast, the center frequency of each SCA Subcarrier shall be kept at all times within _______ Hz of the authorized frequency.
246. The lowest resistance grounding on earth.
a. Sand b. Limestone
c. Surface loam soil
d. Clay
a. 200
b. 300
c. 400
d. 500
252. Sawtooth generator circuits produce the scanning raster but the sync pulses are needed for
a. linearity
b. timing
c. keystoning
d. line pairing
253. Which of the following camera tubes has minimum lag?
a. Vidicon
b. Plumbicon
a. CCTV
b. MATV
c. CATV
d. SATV
258. A class A FM station is limited in antenna height of ______ feet above average terrain.
a. 1000
c. Saticon
b. 2000
d. Iconoscope
c. 4000
d. 5000
254. The service are in standard AM broadcast is described as ______ if there is no fading of signal.
257. A system where the modulated RF picture and sound carrier signals are distributed in a cable network, instead of wireless system.
a. Class A
259. What circuit in the TV receiver is used to develop the high voltage needed to operate the picture tube?
b. Secondary
c. Class B
d. Primary
255. The vertical field-scanning frequency is ______ Hz.
a. 30
b. 60
a. Low-voltage power supply
b. Horizontal output
c. Vertical sweep
d. Sync separator
260. The modulated picture carrier wave includes the composite video signal as the
c. 525
d. 15,750
256. 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.
a. Audio frequency
b. Video frequency
c. Intercarrier frequency
d. Subcarrier frequency
a. Average carrier level b. Symmetric envelope of amplitude variations
c. Lower sideband without the upper sideband d. Upper envelope without the lower envelope
261. With which emission type is the capture-effect more pronounced?
a. CW
b. FM
c. SSB
d. AM
267. A 3.58-MHz subcarrier signal for color in television
262. The hue of color sync phase is
a. red
a. Hue signal
b. Video signal
b. cyan
c. Audio signal
c. blue
d. Chroma signal
d. yellow green
263. How much is the equivalent internal resistance of the electron beam with a 1.2-mA beam current at 25 kV?
268. A class D FM station shall have an authorized power not exceeding ______ watts.
a. 20
b. 15
c. 10
d. 5
a. 48 nano ohms b. 30 ohms
c. 20.8 mega ohms
d. 15.6 kilo ohms
264. The difference between the picture and sound carrier frequencies for channel 3 is ______ MHz.
269. Which of the following is not a benefit of cable TV?
a. 3.58
c. 4.5
d. 6.75
265. Refers to the deviation of the operating frequency of a crystal oscillator from its nominal value due to temperature variations.
a. drift
b. flashover
c. frequency deviation
d. deviation ratio
266. It is the measure of how many picture elements can be reproduced
b. Greater stability
c. Less noise, stronger signal
d. Premium cable channels
b. 64.5
a. Lower-cost reception
270. The width of the vertical sync pulse in the Philippine TV system is
a. 21H
b. 3H
c. H
d. 0.5H
271. Term in communication which is referred, “to send out in all direction”
a. announce
b. broadcast
a. definition
c. transmit
b. resolution
d. media
c. detail
d. any of these
272. The number of frames per second in the Philippine TV system is
a. 60 b. 262 ½
277. The type of modulation of the sound carrier signal is ______.
a. Pulse motion b. Phase modulation
c. 4.5
c. Amplitude modulation
d. 30
d. Frequency modulation
273. It means multiple outlines of edges to the right in the picture.
a. ghosting
278. A video or audio signal that can be used directly to reproduce the picture and sound.
a. Baseband signal
b. Broadband signal
b. ringing
c. fading
c. Electromagnetic wave signal
d. snowing
d. Modulated signal
274. In the Sawtooth waveform for linear scanning,
a. the linear rise is for flyback b. the complete cycle includes trace and retrace
c. the sharp reversal in amplitude produces trace d. the beam moves faster during trace and retrace
275. The purpose of pre-emphasis and de-emphasis in FM broadcasting is to:
a. increase the high frequency amplitude b. improve the audio harmonic
c. decrease the low frequency amplitude
d. improve the S/N ratio
276. The part of the visible spectrum where camera pickup tubes have the greatest output is
279. Class B FM station should have an ERP not exceeding ______ kW.
a. red b. blue
c. yellow-green
d. infrared
a. 50
b. 40
c. 30
d. 20
280. What technique is used to permit hundreds of TV signals to share a common cable?
a. Frequency modulation b. Mixing
c. Frequency division multiplexing
d. Time division multiplexing
281. Another name for the horizontal retrace in a TV receiver is the
a. ringing b. burst
c. damper
d. flyback
282. In the Philippine color television system, the intercarrier frequency, in MHz, is
287. A system used in television field operation to make on-the-spot video tape recordings using portable TV cameras and VTRs.
a. 3.58 b. 3.579645
c. 4.5
d. 45.75
283. In channel 14 (470 to 476 MHz), the 3.58MHz color signal is transmitted at
a. 471.25 MHz
b. 473.25 MHz
c. 474.83 MHz
d. 475.25 MHz
a. SNG
b. ENG
c. HAFC
d. MATV
288. Class B FM station shall have an authorized transmitter power not exceeding ______ kW.
a. 10
b. 100
c. 1000
d. 10000
284. Interlaced scanning eliminates 289. The total bandwidth of an NTSC TV signal is
a. snowing
b. flicker
c. distortion
d. fading
285. Beam alignment magnets for the camera tube are adjusted while rocking which color?
a. Optical focus
b. Electrical focus
c. 6 MHz
d. 10.7 MHz
290. Referred to the oscillator signal “leak through” from a property neutralized amplifier such as a master oscillator power amplifier.
c. Beam current
a. An FM generator
b. A circuit for detecting FM
b. stray signal
c. back wave
d. loss wave
291. Interlacing is used in television to
c. A circuit for filtering two closely adjacent signals
a. carrier
d. Shading
286. What is a frequency discriminator?
b. 4.5 MHz
a. 3.58 MHz
d. An automatic bandwidth circuit
a. produce the illusion of motion b. ensure that all lines on the screen are scanned, not merely the alternate ones
c. simply the vertical sync pulse train
d. avoid flicker
292. Coaxial cable for distribution system has an impedance of
297. Type of radio communication transmission utilizing frequency modulation technique
a. 50 ohms
b. 75 ohms
c. 150 ohms
c. single sideband HF transmission
d. 300 ohms
d. television audio
293. The average voltage value of the 3.58-MHz modulated chrominance signal is
a. zero for most colors b. close to black for yellow
a. television video b. broadcasting in 535-1606 kHz
298. The amount of color in the picture or color intensity in the ______.
a. color level b. chroma level
c. the brightness of the color
c. saturation
d. the saturation of the color
d. any of these
294. When does broadcast station conduct an equipment test?
a. during day time b. during night time
299. One of the early radio transmitters which produced keyed carrier generating purer waveform than spark transmitter, used for high powered RF transmission and are limited to radio frequency of about 500 kHz.
c. during experimental period
d. at any time
295. It causes the picture information to spread out or crowded at one end of the rater compared to the opposite end.
a. Linear scanning b. Interlaced scanning
b. Hartley transmitter
c. Spark transmitter
d. Frequency transmitter
300. A technique where segments of videotape are joined by electronic erasing and recording to create a single program.
c. Non-linear scanning
d. Retrace
296. If the camera cannot be placed far away enough to include everything in the scene, change the lens to one with a
a. Arc transmitter
a. masking b. segmenting
c. editing
d. programming
301. A class C FM station has an authorized power not exceeding ______watts of ERP.
a. lower f rating
a. 500
b. higher f rating
b. 750
c. longer focal length
c. 1000
d. shorter focal length
d. 2000
302. The assembly around the neck of a picture tube that produces the magnetic fields that deflect and scan the electron beams is called the _________.
a. shadow mask b. phosphor
c. electron gun
d. yoke
303. An odd number of lines per frame form part of every one of the world’s TV systems. This is _____________________.
a. done to assist interface
b. purely an accident c. to ensure that line and frame frequencies can be obtained from the same original source d. done to minimize interference with the chroma subcarrier
304. The difference between the sound carrier and the color signal is
a. 4.5 MHz
b. 1.25 MHz
c. 0.92 MHz
d. 0.25 MHz
305. In color television, it is made for uniform color in the raster.
307. The number of fields is ______ per frame.
a. beam-landing adjustment
b. degaussing
c. internal blanking adjustment
d. background control
306. Which of the following camera tubes uses lead oxide for the photoconductive target plate?
a. vidicon
b. plumbicon
c. saticon
a. 2
b. 60
c. 525
d. 262.5
308. An RF carrier wave that is frequency – modulated by the baseband audio signal in TV broadcasting.
a. Audio signal
b. Video signal
c. Intercarrier signal
d. Color signal
309. A class B FM station is limited in antenna height of ____ feet.
a. 1000
b. 500
c. 250
d. 100
310. The HV anode supply for the picture tube of a TV receiver is generated in the
d. image orthicon
a. mains transformer b. vertical output stage
c. horizontal output stage
d. horizontal deflection oscillator
311. A tap for the subscriber drop line has a
a. high insertion loss
b. high tap loss
c. low tap loss
d. 300-ohm impedance
312. Which system can be used for both recording and playback?
317. The effective radiated power of a class A FM station should not exceed ______ kW.
a. CED
b. VHD
b. 30
a. 125
c. laser disk
c. 10
d. VHS
d. 1
313. The hue 180 degrees out of phase with red is ______.
318. In television, 4:3 represents the
a. cyan
b. yellow
c. green
d. blue
314. It is used around the phosphor dots to make a darker black which improves contrast in the picture.
a. black masking
b. convergence adjustment
c. shadow masking
d. color parity adjustment
315. A lens with lower f rating is _____ lens that allows more light input.
a. slower b. wider
c. narrower
d. faster
316. Picture frames are repeated at the rate of ___ per second.
a. 30
b. 60
c. 45
d. 50
b. maximum horizontal deflection
c. aspect ratio
d. ration of the two diagonals
319. Titling the video head gaps is necessary with the
a. color under
b. zero guard bands
c. FM luminance signal
d. Long – play tapes
320. It is a special camera tube with a test pattern printed in the image plate.
a. vidicon
b. monoscope
c. oscilloscope
d. iconoscope
321. The number of lines scanned per frame in the raster on the picture tube screen is
a. interface ratio
a. 525
b. 262 ½
c. 20
d. 10
322. One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency of operation and RF amplifier stage or stages that develop the high power output. The purpose of which is to develop a good frequency stability.
327. The shadow mask in color picture tube is used to
a. MOPA
b. Hartley
c. Alexanderson
d. Goldsmith
323. Camera signal output without sync is called ______.
a. black burst b. generator lock video
c. composite video
d. non-composite video
324. The tint of the color is its _____.
d. Vestigial sideband AM
a. Reduce X-ray emission b. Ensure that each beam hits only its dots
c. Increase screen brightness
d. Provide degaussing for the screen
328. The video heads rotate at high velocity to increase the
a. tape speed
b. writing speed
c. reel rotation
d. tape tension
329. How do you eliminate radio frequency variation of an oscillator transmitter caused by its supply voltage?
a. brightness a. use of a regulated power supply
b. contrast
c. chroma
d. hue
c. use of high capacitor in the supply circuit
d. loosen power supply shielding
325. Which frequency band is the standard AM radio broadcast?
b. use of a new power supply
330. The composite video signal includes the camera signal with the following except
a. HF b. UHF
a. picture information b. sync pulses
c. MF
d. VHF
c. blanking pulses
d. camera signal
326. The I and Q composite color signals are multiplexed onto the picture carrier by modulating a 3.58 MHz subcarrier using
a. FM
b. PM
c. DSB AM
331. A lens has an 8-cm focal length and 4-cm diameter. Its f rating is
a. 2
b. 4
c. 8
d. 32
332. Which of the following is a possible cause for an abrupt frequency variation in a self – excited transmitter oscillator circuits resulting poor frequency stability to hold a constant frequency oscillation?
a. DC and RF AC heating of resistor which cause a change in values b. Heating and expansion of oscillator coil
c. Heating of capacitor in the oscillator
d. Power supply voltage changes
333. How long does it take to scan 2 picture elements when 400 are scanned in 50 microseconds?
a. 25 microsec
b. 0.25 microsec
c. 2.5 microsec
d. 0.5 microsec
b. Color subcarrier
c. Q an I
d. Luminance Y
337. Which of the following is a midband cable TV channel?
a. 6
b. 7
c. 14
d. 23
338. What is the primary purpose of an RF amplifier in a receiver?
a. to vary the receiver image rejection by utilizing the AGC b. to provide most of the receiver gain
c. to develop the AGC voltage
d. to improve the receiver’s noise figure
339. The color with the most luminance is 334. Anode voltage for the picture tube, developed from the output of the horizontal deflection circuit.
a. Yoke voltage
b. Flyback voltage
c. Aquadag voltage
d. Tube voltage
335. The channel spacing in the Philippine FM broadcast standards
a. 400 kHz
b. 800 kHz
c. 600 kHz
d. 200 kHz
336. What is the black-and-white or monochrome brightness signal in TV called?
a. red
b. yellow
c. green
d. blue
340. It is the light flux intercepted by a one-footsquare surface that is one-foot from a onecandlepower source.
a. candela
b. footcandle
c. lux
d. lumens
341. Refers to the possible cause of an abrupt frequency variations in a self-excited transmitter oscillator circuit resulting to a poor frequency stability to hold a constant oscillator.
a. RGB
a. poor soldered connections
b. heating of capacitor in the oscillator c. DC and AC heating of resistors which cause change in values d. Aging which cause change in condition in parts characteristics
342. It is the difference in intensity between the black parts and white parts of the picture.
a. brightness
346. In the CED system, the disk capacitance varies with the
a. pit depth
b. disk size
c. speed of rotation
d. wavelength of the scanning light
347. The final power amplifier in an FM transmitter usually operates class ______.
b. hue
c. contrast
a. AB
d. illumination
b. C
c. B
d. A
343. The stereophonic subcarrier suppression level in the Philippines standards
a. less than 4% modulation of the main carrier b. less than 3% modulation of the main carrier c. less than 2% modulation of the main carrier d. less than 1% modulation of the main carrier
344. The sound IF in a TV receiver is
348. In a picture tube, it is the total angle that the beam can be deflected without touching the sides of the envelope.
c. 41.25 MHz
d. 45.75 MHz
345. The circuit the separates sync pulse from the composite video waveforms is
a. the keyed AGC amplifier
b. a clipper
c. an integrator
d. a differentiator
b. tube angle
c. picture angle
d. deflection angle
349. It is necessary to time the scanning with respect to picture information
a. 4.5 MHz b. 10.7 MHz
a. screen angle
a. flyback
b. synchronization
c. blanking
d. scanning
350. The intermediate frequency used in for FM broadcasting Philippine standards.
a. 455 kHz
b. 10.7 MHz
c. 11.4 MHz
d. 12.5 MHz
351. What is the horizontal scanning time for 20 pixels?
356. Class of FM station where its authorized power should not exceed 15 kW.
A. 2.5 microsec
A. Class A
B. 0.25 microsec
B. Class B
C. 1.25 microsec
C. Class C
D. 125 microsec
D. Class D
352. In basic radio transmitter, the main advantage of a single-tube transmitter is
357. What is the name of the solid state imaging device used in TV cameras that converts the light in a scene into an electrical signal?
A. Frequency instability
B. Non-portable
A. CCD
C. Heating effect
B. Phototube matrix
D. Bulky
C. Vidicon
D. MOSFET array
353. The carrier transmitted 1.25 MHz above the bottom frequency in a Philippine TV channel is the
358. The signals sent by the transmitter to ensure correct scanning in the receiver is called
A. Sound carrier
B. Chroma carrier
A. Sync
C. Intercarrier
B. Chroma
D. Picture carrier
C. Luminance
D. Video
354. In camera tubes, it means that the old image remains too long after the picture information on the target plate has changed.
359. What signals are transmitted by a SSBSC transmitter when no modulating signal is present?
A. Light lag
A. The upper sideband only
B. Switch lag
B. Both the upper and lower sideband
C. Image lag
C. The lower sideband
D. Camera lag
D. No signal transmitted
355. What is the maximum color TV bandwidth?
A. 1.6 MHz
B. 0.5 MHz
C. 1.0 MHz
D. 1.3 MHz
360. The second IF value for color in receivers, for any station, is
A. 0.5 MHz
B. 1.3 MHz
C. 3.58 MHz
D. 4.5 MHz
361. In the frame for which interfaced scanning is used, alternate lines are skipped during vertical scanning because
A. The trace is slower than retrace B. The vertical scanning frequency is doubled from 30 to 60 Hz
C. The horizontal scanning is slower than vertical scanning D. The frame has a 4:3 aspect ratio
362. A typical value of vidicon dark current is
366. This is referred to as a fixed radio station that broadcast program material from audio to transmitter by radio link.
A. Aural BC intercity relay
B. Aural broadcast STL
C. Short wave station
D. Remove pick-up
367. Indicate which of the following frequencies will not be found in the output of a normal TV receiver tuner.
A. 0.2 microampere
A. 4.5 MHz
B. About 200 microampere
B. 41.25 MHz
C. 8 milliampere
C. 45.75 MHz
D. 800 milliampere
D. 42.17 MHz
363. The smallest are of light or shade in the image is a picture element called
A. Chroma
B. Hue
C. Contrast
D. Pixel
364. An entry of the time the station begins to supply power to the antenna and the time it stops.
368. In all standard television broadcast channels , the difference between the picture and sound carrier frequencies is
A. 0.25 MHz
B. 1.25 MHz
C. 4.5 MHz
D. 6 MHz
369. It is caused by phase distortion for video frequencies of about 100 kHz and lower.
A. Operating log entries
B. Program log entries
A. Streaking
C. Operating schedule
B. Snowing
D. Any of these
C. Ringing
D. Fading
365. What type of circuit is used to modulate and demodulate the color signals?
370. Special effects and production switching are done by the
A. Phase-locked loop
B. Differential peak detector
A. CCU
C. Quadrature detector
B. ENG camera
D. Balanced modulator
C. SEG
D. Sync generator
371. A picture has 400 horizontal and 300 vertical picture elements. What is the total number of details in the picture?
A. 120,000
B. 700
C. 0.75
376. The frequency spectrum of the stereophonic FM signal.
A. 67 kHz
B. 59.5 to 74.5 kHz
C. 19 to 38 kHz
D. 30 to 53 kHz
D. 100 377. Equalizing pulses in TV are sent during
372. After the IF stages have been aligned, the next stage to align in FM receiver is
A. Local oscillator
B. Limiter stage
C. RF amplifier
D. Mixer stage
373. What ensures proper color synchronization at the receiver?
A. Sync pulses
B. Quadrature modulation
C. 4.5-MHz intercarrier sound
D. 3.58-MHz color burst
374. The interfering beat frequency of 920 kHz is between the 3.58-MHz color subcarrier and the
A. 4.5-MHz intercarrier sound
B. Picture carrier
C. Lower adjacent sound
D. Upper adjacent picture
375. Light is converted to video signal by the _____ tube.
A. Camera tube
B. Picture tube
C. Anode tube
D. Cathode tube
A. Horizontal blanking
B. Vertical blanking
C. The serrations
D. The horizontal retrace
378. Which signal has color information for 1.3 MHz bandwidth?
A. I
B. Y
C. R-Y
D. B-Y
379. It is the distance from the center of the lens of the camera to the point at which parallel rays from a distant object come to a common focal point.
A. Focal length
B. Latus rectum
C. Major axis
D. Minor axis
380. The method of generating FM used by broadcast station is
A. Direct
B. Indirect
C. Insertion
D. All of these
381. The picture and sound carrier frequencies in a TV receiver IF are respectively.
386. A signal in which the sum of all signals which frequency-modulates the main carrier.
A. 41.25 and 45.75 MHz
A. Composite baseband signal
B. 45.75 and 41.25 MHz
B. FM baseband
C. 41.75 and 45.25 MHz
C. Main channel signal
D. 45.25 and 41.75 MHz
D. Stereophonic signal
382. The channel width in the Philippine TV system, in MHz, is
A. 41.25
B. 6
387. What is the total number of interlaced scan lines in one complete frame of a NTSC Philippine TV signal?
A. 262 ½
C. 4.5
B. 525
D. 3.58
C. 480
D. 625
383. The cable converter output or the TV receiver is usually on channel
388. The video voltage applied to the picture tube of a television receiver is fed in
A. 3
B. 6
A. Between grid and ground
C. 7
B. To the yoke
D. 9
C. To the anode
D. Between the grid and cathode
384. One-half line spacing between the start positions for scanning even and odd fields produces
A. Linear scanning
B. Line pairing
C. Fishtailing
D. Exact interlacing
385. Precise scanning size and linearity are most important in
A. A black-and-white camera
B. Plumbicon
C. A single-tube color pickup
D. A saticon
389. How many dBmV units correspond to a 1-mV signal level?
A. 0
B. 1
C. 3
D. 6
390. In color television, it is made to maintain neutral white from low to high levels of brightness.
A. Internal color adjustment
B. Color-temperature adjustments
C. Shadow masking
D. Convergence adjustment
391. Average power of a radio transmitter supplied to the antenna transmission line by a transmitter during one radio frequency cycle taken under the condition or no modulation.
A. Peak envelope power
B. Rated power
C. Carrier power
D. Mean power
392. The number of scanning lines is ____ per second.
A. 525
B. 262 ½
C. 15,750
D. 30
393. The ratio of the actual frequency swing to the frequency swing defined as 100 percent modulation, expressed in percentage.
C. 4
D. 60
396. A communication circuit using class C amplifier is considered a narrow band amplifier if the bandwidth is less than _____ % of its resonant frequency.
A. 15
B. 13
C. 10
D. 20
397. The width of a vertical sync pulse with its serrations includes the time of
A. Six half-lines, or three lines
B. Five lines
C. Three half-lines
D. Five half-lines
398. A low-contrast picture in which white seems flat and lacking in detail suggests
A. Modulation index
B. Deviation ration
C. Maximum deviation
A. Low beam current
D. Percentage modulation
B. High gain in the pre-amplifier
C. Excessive gamma
D. Insufficient scanning width
394. In a TV receiver, the color killer
A. Cuts off the chroma stages during monochrome reception
B. Ensures that no color is transmitted to monochrome receivers C. Prevents color coding D. Make sure that the color burst is not mistaken for sync pulses, by cutting off reception during the back porch.
395. How many TV fields are recorded on one slant track of tape?
A. 1
B. 2
399. The product of the transmitter power multiplied by the antenna power gain of the antenna field gain squared.
A. Field intensity
B. Field gain
C. ERP
D. Electric field strength
400. What keeps the scanning process at the receiver in step with the scanning in the picture tube at the receiver?
A. Nothing
B. Sync pulses
C. Color burst
A. 31,500
B. 15,700
C. 262 ½
A. 200
B. 100
C. 50
D. 25
406. The output of the vertical amplifier, applied to the yoke in a TV receiver, consists of
A. Direct current
B. Amplified vertical sync pulse
C. A sawtooth voltage
D. A sawtooth current
D. 525
402. In a basic transmitter, ________is a kind of transmitter that develops type B emission.
A. Arc
B. Spark
C. Alexanderson
D. Deflection oscillators
401. The number of lines per second in the TV system is
405. The FM broadcast band is divided into _____ channels are suggested by KBP.
407. The frequency spectrum of the stereophonic FM signal.
A. 67 kHz
B. 59.5 kHz to 74.5 kHz
C. 19 kHz to 38 kHz
D. 30 kHz to 53 kHz
D. High end
403. It is a number that indicates how contrast is expanded or compressed.
408. What is the video frequency response corresponding to the horizontal resolution of 200 lines?
A. Alpha
A. 4 MHz
B. Beta
B. 1.5 MHz
C. Gamma
C. 4.5 MHz
D. Sigma
D. 2.5 MHz
404. Color picture tubes have ______ guns for its phosphors.
A. 1
B. 2
C. 3
D. 4
409. The gamma of the picture tube is
A. 0.4545
B. 1.0
C. 1.4
D. 2.2
410. It is the instantaneous departure of the frequency of the emitted wave from the center frequency resulting from modulation.
A. Deviation
B. Frequency swing
C. Phase shift
D. Deviation ratio
411. If a TV sound transmitter has a carrier frequency of 197.75 MHz, the picture carrier is
A. 191.75 MHz
B. 193.25 MHz
C. 202.25 MHz
415. The two black conductive coatings of picture tubes are made up of
A. Phosphor
B. Aquadag
C. Cavity
D. Nickel
416. The maximum power allocation of AM transmitter in Metro Manila in kW is
A. 10 kW
B. 20 kW
C. 40 kW
D. 30 kW
D. 203.75 MHz
412. The number of lines per field in the Philippine TV system is
417. The function of the serrations in the composite video waveforms is to
A. Equalize the change in the integrator before the start of vertical retrace
A. 262 ½
B. 525
B. Help vertical synchronization
C. 30
C. Help horizontal synchronization
D. 60
413. What is the best site of an AM broadcast transmitter?
D. Simplify the generation of the vertical sync pulse
418. Which system uses a light beam for playback?
A. Marshy land
A. CED
B. Dry land
B. VHD
C. Highly elevated
C. Betamax
D. Average terrain
D. VLP
414. What is the hue of a color 90 degrees leading sync burst phase?
419. Weak emission from one cathode in a tricolor picture tube causes
A. Yellow
A. A weak picture
B. Cyan
B. A long warmup time
C. Blue
D. Orange
C. A color imbalance in the raster and picture D. All of these
420. In AM broadcast, the current carrier shift at any percentage of modulation shall not exceed
425. Brightness variations of the picture information are in which signal?
A. 5%
A. I
B. 15%
B. Q
C. 20%
C. Y
D. 2.5%
D. R-Y
421. Indicate which voltages are not found in the output of a normal monochrome receiver video detector.
A. Sync
B. Video
C. Sweep
D. Sound
422. The sawtooth waveform for deflection provides _______.
A. Horizontal deflection
B. Distortions
C. Linear scanning
D. Flicker
423. In AM broadcast, the transmitter must be capable of maintaining the operating frequency within the limits of ______.
A. +/- 10 Hz
B. +/- 20 Hz
C. +/- 25 Hz
D. +/- 75 Hz
424. How much illumination in lux a 400candlepower make that is 3 meters from the surface?
426. How many octaves is the frequency range of 1 to 8 MHz?
A. 1
B. 2
C. 3
D. 8
427. For television, the maximum deviation of the FM sound signal in kHz.
A. 10
B. 25
C. 75
D. 100
428. Indicate which of the following signals is not transmitted in color TV
A. Y
B. Q
C. R
D. I
429. Emission outside of the assigned channel, as a result of the modulation process.
A. Overmodulation
B. Spurious emission
A. 133.3
C. Out-of-band emission
B. 1200
D. In band emission
C. 200
D. 44.4
430. Determine which of the following is not part of RF section of a radio transmitter.
A. Master oscillator
B. Buffer amplifier
C. AF voltage amplifier
D. Frequency amplifier
431. The power of any conducted spurious emission shall be attenuated below the maximum level of carrier frequency in accordance with the following formula:
A. Attenuation (dB) = 43 + 20 log P
B. Attenuation (dB) = 43 + log P
C. Attenuation (dB) = 43 + 10 log P
D. Attenuation (dB) = 43 + log P/10
432. In television, gamma affects _____
D. 1.0 inch
435. Compared with 100 percent saturation, the desaturated color have
A. More luminance for the Y signal
B. Less luminance for the Y signal
C. More chrominance for the C signal
D. Less hue for the C signal
436. What is the practical baseband frequency for the color video signal?
A. 1 MHz
B. 2 MHz
C. 0.2 MHz
D. 0.5 MHz
437. What is the diagonal screen size for the 19CP4 picture tube?
A. Color
B. Contrast
A. 21
C. Brightness
B. 23
D. Hue
C. 4
D. 19
433. In the IRE scale for the composite video signal, what is the number of IRE units for sync?
438. What is the phase angle between B – Y and R – Y?
A. 7.5
B. 92.5
A. 180 deg
C. 40
B. 45 deg
D. 10
C. 90 deg
D. 270 deg
434. As prescribed by the technical standards for Cable Television operation and in order to be compatible for any value added services in the future, Trunk cable should have a minimum diameter of _______.
439. How many gray scale steps are in the EIA test pattern in television?
A. 10
A. 0.25 inch
B. 40
B. 0.5 inch
C. 50
C. 0.75 inch
D. 15
440. In TV, degaussing is done with _____.
A. Direct current
B. Pulsed current
C. Alternating current
D. Any of these
441. R, G and B video drive controls set for ________.
B. 20 kV
C. 10 kV
D. 30 kV
446. In television, what is the phosphor number for monochrome picture tube?
A. P4
B. P21
C. P22
D. P3
A. Black
B. Dark gray
C. White
D. Light gray
442. What is the phase difference between the color sync burst and the B – Y video?
447. In television picture tube, what is the color of the P1 phosphor?
A. Red
B. Green
C. Yellow
D. Blue
A. 180 deg
B. 45 deg
C. 90 deg
D. 270 deg
443. What is the hue of the color sync burst?
448. What video frequency corresponds to 240 lines of horizontal resolution?
A. 1 MHz
B. 3 MHz
A. Yellow-green
C. 2 MHz
B. Red
D. 4 MHz
C. Blue
D. Orange
444. What synchronizes the horizontal of the TV picture tube?
449. The minimum FM broadcast transmitter power in metro manila and metro cebu is
A. 25 kW
B. 10 kW
A. HSC
C. 1 kW
B. HAFC
D. 30 kW
C. HFC
D. HAC
445. What is the typical anode voltage for a 25-inch color picture tube?
A. 3 kV
450. The maximum power suggested by KBP on 919-1312 AM broadcast station in Metro Manila.
A. 10 kW
B. 20 kW
C. 15 kW
D. 5 kW
451. What are the frequency limits of the standard AM broadcast band?
A. 565 to 1605 kHz
B. 535 to 1605 kHz
C. 575 to 1615 kHz
D. 535 to 1615 kHz
452. What is the width of an AM broadcast channel?
A. 30 kHz
B. 25 kHz
C. 15 kHz
D. 200 kHz
453. The following are designations of service areas of AM broadcast station, except:
A. Primary
B. Secondary
C. Tertiary
D. Intermittent
454. The following are parts of the AM broadcast day, except:
A. Daytime
B. Night time
C. Mid-day
D. Experimental period
455. Why is it desirable to have broadcast antennas on marshy land?
A. For better reflection
B. For ground wave radiation
C. For greater absorption
D. For sky wave propagation
456. What is another name for a console pot?
A. Attenuator
B. Gain control
C. Fader
D. Any of these
457. The highest peaks of modulation in AM should be held between what two percentages?
A. 85 - 100%
B. 65 - 70%
C. 50 - 75%
D. 75 - 90%
458. What is the name of the second transmitter used when a station operates 24 hours a day?
A. Alternate
B. Reserve
C. Spare
D. Diversity
459. What is a combo operator?
A. Announcer
B. Disk jockey
C. Engineer
D. All of these
460. What term is used to indicate intercom operation in a broadcast station?
A. Communication
B. Talk-back
C. Respond
D. Remote talk
461. What does a red light glowing in a studio indicate?
A. Off the air
B. Floating
C. Experimental
D. On the air
462. What is the attenuator which controls the the output of the program amplifier called?
D. Any of these
467. What device is used to make up for the highfrequency losses in long AF lines?
A. Signal booster
B. Noise suppressor
A. Master gain control
C. Line equalizer
B. Auxiliary gain control
D. Compander
C. Reserve frequency control
D. Auxiliary frequency control
463. The following are important operational requirements during a broadcast, except:
468. What is another term meaning “operating power”
A. Licensed power
B. Sideband power
A. Timing
C. Audio power
B. Modulation
D. Harmonic power
C. Fidelity
D. AF amplitude
464. What are the names of two unbalanced pads used in broadcasting?
469. What does maximum rated carrier power referred to?
A. Buffer amplifier power rating
B. Intermediate amplifier power rating
A. T and L
C. Speech amplifier power rating
B. K and P
D. Final-amplifier power rating
C. R and I
D. H and L
465. What is the advantage of using balanced lines in audio systems?
A. Receive balanced sound
B. Improve fidelity
C. Reduce noise pickup
D. Improve carrier level
466. What is the advantage of using T-pad attenuators over potentiometers?
A. Better energy conversion
B. Better attenuation
C. Match impedance better
470. When are equipment tests made?
A. Mid-day
B. Daytime
C. Night time
D. Experimental period
471. What is the maximum allowable distortion at 80% modulation?
A. 3%
B. 4%
C. 5%
D. 6%
472. On what are proof-of-performance tests in broadcasting made?
A. Omnidirectional antennas
B. Directive antennas
C. High gain antennas
D. Any of these
473. Within what limits must the antenna current ratios of a directional antenna be held?
A. 3%
B. 5%
C. 4%
D. 1%
474. What monitor is required at the operating position in a broadcast station?
A. Frequency
B. Modulation
C. Fidelity
D. Carrier
475. What monitor may also give an indication of carrier amplitude regulation?
A. Modulation
B. Carrier
C. Fidelity
D. Frequency
A. Identification
B. Program description
C. Sponsors and network name
D. All of these
478. The item required in an operating log?
A. Antenna power and programs on-off
B. EBS tests
C. Antenna lights and meter readings
D. Any of these
479. The item required in a maintenance log?
A. Meter replacements
B. Antenna current checks
A. One year
B. Two years
C. Three years
D. Five years
481. What class operator has no restrictions on technical work in a broadcast station?
A. Spectrum analyzer
B. Fourier analyzer
C. CRT oscilloscope
D. Frequency probe
A. 1st phone B. 2nd phone C. 3rd phone D. 4th phone
482. What classes of operators are restricted on technical work in a broadcast station?
477. The item required in program log?
D. Any of these
480. What is the minimum time broadcast station logs must be held?
476. What device can give the most accurate instantaneous peak-of-modulation indications?
C. Light inspection and experimental period operation
A. 3rd phone B. 2nd phone C. 4th phone D. 2nd and 3rd phone
483. If improper transmitter indications are given at the remote-control point, what should be done?
A. First phone operator to transmitter
B. Second phone operator to transmitter
C. Third phone operator to transmitter
D. Fourth phone to transmitter
484. How often must IDs be made in a broadcast station?
A. Quarter of an hour
B. Half an hour
C. On the hour
D. On the day
485. Where must station license be posted?
A. Tower
B. Modulators
C. Transmitter
D. Receiver
486. Where operator licenses must be posted?
A. Operating desk
B. Operating position
C. Operating console
D. Anywhere
487. What device is usually used today to measure the frequency of a broadcast station?
A. Multivibrators
B. Counter
C. Ripper
D. Wave meter
488. What does EBS stand for?
A. Electronic Broadcast System
B. Emergency Broadcast System
C. Electronic Base Station
D. Emergency Base Station
489. How often must EBS tests be made?
A. Weekly
B. Daily
C. Monthly
D. Yearly
490. What must non-EBS station have?
A. EBS signal monitor
B. EAN signal monitor
C. EAT signal monitor
D. CPCS signal monitor
491. What stylus material is used in broadcast station?
A. Ruby
B. Gamet
C. Emerald
D. Diamond
492. What advantage is there to having heavy turntables?
A. Constant speed
B. Less vibration
C. Rumble
D. All of these
493. What is the width of recording tapes?
A. 0.5 inch
B. 0.75 inch
C. 0.125 inch
D. 1 inch
494. What frequency is used to erase tapes?
B. Subsonic
C. Ultrasonic
D. Infrasonic
495. What tape speed produces highest fidelity of audio?
C. Image orthicon
D. Kinescope
500. Which camera tube requires electron multipliers?
A. Vidicon
B. Iconoscope
C. Image orthicon
D. Kinescope
A. 20 in/sec
B. 15 in/sec
C. 10 in/sec
D. 5 in /sec
496. What should be used to clean recording heads?
A. Methanol
B. Ethyl Alcohol
C. Isopropyl alcohol
D. Rubbing alcohol
497. What impedance is usually used with broadcast microphones?
A. All of these
B. 150 ohms
C. 250 ohms
D. 600 ohms
498. In what log is antenna-light information entered?
A. Maintenance log
B. Program log
C. Operating log
D. Logging log
499. What was the name of the first TV camera tube?
B. Iconoscope
A. Supersonic
A. Vidicon
501. Which is used in closed-circuit TV?
A. Vidicon
B. Iconoscope
C. Image orthicon
D. Kinescope
502. What is the waveform of the sweep voltages?
A. Trapezoidal
B. Sawtooth
C. Trigger
D. Square
503. If the pulse peak is 100% modulation, what is the blanking level?
A. 25%
B. 50%
C. 65%
D. 75%
504. What device allows one camera to accept pictures from three or more projectors?
A. Film multipliers
B. Film demultiplexers
C. Film multiplexers
D. Film acceptor
505. What is the order of scanning four successive motion-picture frames for TV?
A. 3,2,3,2
B. 2,3,2,3
C. 2,2,3,3
D. 3,3,2,2
506. From the low-frequency end of a channel, what is the visual carrier frequency?
A. 3.58 MHz
B. 0.25 MHz
C. 1.25 MHz
D. 4.5 MHz
507. The circuits make up the front end of a TV receiver, except:
A. RF
B. Mixer
C. IF
D. Oscillator
508. What is the impedance at the antenna input terminals of a TV receiver?
A. 300 ohms
B. 150 ohms
C. 50 ohms
D. 100 ohms
509. Why are triodes and MOSFETs best for TV RF amplifiers?
A. High power
B. Efficiency
C. Low noise
D. High gain
510. In what circuit configuration are triodes and MOSFETs used?
A. Cascade
B. Darlington
C. Cascade
D. Shunt
511. The signal might a video amplifier amplify?
A. Aural IF
B. Video
C. Blanking
D. Any of these
512. When coupling from a sync separator, what is used to obtain the horizontal sync pulses?
A. Integrator
B. Corrector
C. Differentiator
D. Separator
513. When coupling from a sync separator, what is used to obtain the vertical sync pulses?
A. Integrator
B. Corrector
C. Differentiator
D. Separator
514. The type of active device used in horizontal output stages, except:?
A. Vacuum tube
B. FET
C. BJT
D. SCR
515. What should be produced by weak blue, weak green, and weak red signals on a color CRT?
A. White
B. Shade
C. Gray
D. Off white
