This is the Coaching materials in Broadcasting Part 2 as one topic in ECE Board Exam taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies (EST), Communications Books, Journals and other Communications References. This particular Coaching Notes in Communications Engineering has random Questions and Answers in random topics. Make sure to familiarize this review notes to increase the chance of passing the ECE Board Exam.
Broadcasting Coaching Materials Part 2
56. The final amplifier of either FM or AM transmitter is operated as
Class C
57. Standard AM broadcasting use _____ for greater and efficient coverage.
vertical polarized wave antenna
58. Receiver sensitivity means
the ability of picking up weak signal.
59. The main function of the RF amplifier in a superheterodyne receiver is to
improve the rejection of the image frequency.
60. Local oscillator of a broadcast receiver always tunes to a frequency _____ than the incoming frequency in order _____.
Higher --- to allow adequate frequency coverage without switching
61. Which of the following is the first component of any MATV system to receive broadcast signals?
Antenna
62. It is the most common technique where apartment houses, hotels, schools, condominiums, and multi-unit buildings distribute TV and FM signals to a number of receivers, using a single head-end.
CCTV
63. Interlacing is used in television to
avoid flicker.
64. A mechanism or device which enables the TV camera to move in lateral and tilting motion
Pan/tilt device
65. Which of the following is a solid state imaging device?
Charge couple device
66. What class of TV camera lens used to cover short distances?
Wide angle
67. What class of TV camera lens used to cover long distances?
Telephoto
68. What is the chroma subcarrier signal frequency for color television?
3.8 MHz
69. The aspect ratio of HDTV is
16/9
70. Television has a lot of features in common with
motion picture.
71. The major component of the TV signal waveform is the
Video
72. For NTSC TV system, the image is scanned from
top to bottom and left to right
73. What is the horizontal synchronous/blanking pulse rate?
15.75 Hz
74. What is the vertical blanking pulse rate?
60Hz.
75. The pulses riding on the vertical blanking pulse.
Equalizing (sync) pulses and serrated vertical sync pulses.
76. Television camera pickup tube is called
vidicon, image orthicon, plumbicon
77. The television picture tube magnetic fields can be used for
beam focusing and beam deflection
78. Indicate which voltages are not found in the output of a normal monochrome receiver video detector.
Sweep
79. Video modulation for television is
both amplitude modulation and vestigial sideband
80. What is the maximum frequency deviation for audio modulation in TV transmission?
25 kHz
81. The video carrier and the audio carrier are separated by
4.5 MHz.
82. In a practical image scanned at the NTSC rate, the spectrum will include components clustered at the fundamentals and harmonics of
15.75 Hz.
83. Brightness of an image is known as
Luminance
84. The colors at the vertices of the color triangle are referred to as
Primary
85. A newscast is a distinct unit of a program with a minimum news content of _____ excluding intro, extro, headline and commercial load.
1 minute
86. In accordance with existing provision of law and the KBP rules and regulations, all stations shall actively promote the growth and the development of Filipino music by playing ____ every clock hour.
4 OPM
87. KBP radio code mandates that station must provide a minimum of _____ of news per day from 5:00 in the morning to 10:00 in the evening.
45 minutes
88. What are the three separate signals derived from a matrix in a color TV transmitter?
Y,I, and Q.
89. Range of a VHF television transmitter.
54-98 MHz
90. Range of a UHF television transmitter
470-890 MHz
91. What is the approximate bandwidth occupied by the chrominance video signal for color TV?
1.8 MHz
92. Commercial load for radio shall not exceed _____ for one hour program in Metro Manila.
15 minutes
93. Commercial load for radio shall not exceed _____ for a one hour program outside Metro Manila.
17 minutes
94. Program interruption for the airing of commercial in Metro Manila shall not exceed _____ breaks every program hour.
6
95. Program interruption for the airing of commercial outside Metro Manila shall not exceed _____ breaks in every program hour.
6
96. The colors found around the perimeter of the color triangle are said to be
Saturated
97. What is the phase difference between the I and Q color signal carriers?
90 degrees
98. The carrier transmitted 1.25MHz above the bottom frequency in a United States TV Channel is the
picture carrier
99. ______ is the most effective filter for separating luminance and chrominance frequency components.
Comb
100. The chrominance processing circuits can be deactivated when monochrome broadcasts are received by the
color killer
101. What is the standard video level, in percent PEV, for blanking?
75%
102. What is the standard video level, in percent PEV, for black?
70%
103. What is the standard video level, in percent PEV, for white?
0%
104. One should first perform ______ before a convergence setup is performed.
Degaussing
105. For Metro Manila, the classification of primetime blocks for FM shall be
6:00AM to 8:00 PM
106. For provincial stations, the classification of primetime blocks for FM radio shall be
6:00AM to 8:00 PM
107. All airtime classifications shall be submitted to and subject for approval by the
KBP-SA
108. What is the frequency tolerance of an FM Radio Broadcast station?
±2000 Hz
109. The minimum frequency separation between frequency of AM broadcasting station
36 kHz
110. If there are too harmonics, one should check the
coupling, tuning of circuits, shielding
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