1. The FM antenna system shall be standard to employ what polarization? Horizontal
2. A microphone measures sound at a position in a free field 5m from a point source. Calculate the
change in sound level if the microphone is moved to a position 10m from the source. -6db
3. What is the polarity of the TV signal? Horizontal
4. The center frequency of each FM SCA subcarrier shall be kept at all times within 500Hz
5. It is a station which rebroadcast the signals of an FM radio broadcast station. FM broadcast translator
6. What is the bandwidth of the iBiquity IBOC-AM all digital system 20kHz 16^2=256 lmfao
7. 120 Phons is equivalent to how many sones? 16
8. Based on KBP TV broadcast standards, SAP means Second Audio Program
9. A machine with a sound power level of 104 dB is radiating uniformly over a flat non-absorbent
surface. Calculate the sound level at a distance of 10 m. 76 dB
10. The AM broadcast field strength is expressed in V/m
11. It is a subcarrier within the FM broadcast baseband used for transmitting signals for stereophonic
sound reception of the main broadcast program service. Stereophonic Sound Subcarrier
12. It is usually given as the equivalent SPL which would give the same output voltage. Self-Noise
13. It is the term used to describe the measurement of hearing sensitivity. Audiometry
14. The FM radio frequency spectrum is from 88-108 MHz
15. It is the colometric difference between any color and a reference color. Chrominance
16. What is the bandwidth of the iBiquity IBOC-FM all digital system? 400 KHz
17. In NTSC TV broadcast, the chrominance subcarrier frequency is 3.58 MHz
18. Determine the sound power level of 0.001 watts
19. In AM broadcast, the term experimental period refers to the time between. 1600 to 2100 UTC
20. A good sound absorber has a coefficient equal to. One
21. Calculate the intensity of a sound at a distance of 10m from a uniformly radiating source of 1 watt of
power 0.795 mW/m^2
22. Based on the KBP manual, the maximum ERP of TV stations was based on the antenna height above
average terrain not in excess of. 600 m
23. The majority of moving-coil microphones have a directional pattern of. Omnni-directional
24. Which of the following is not a main consideration in the selection of an antenna site? Economic
reasons
25. In NTSC, the field frequency in field/sec. is. 60
26. In NTSC, how many lines are there in a frame? 525
27. Every FM broadcast cannel is separated by 0.2 MHz
28. It defines the conversion efficiency of the microphones. Sensitivity
29. It is the type of transmission used TV broadcasting, where a decrease in the initial light intensity
causes an increase in the transmitted power. Negative transmission
30. The modulation technique used in the Eureka system is. QPSK
31. Based on the KBP manual, the maximum ERP of TV stations was based on the antenna height above
average terrain not in excess of. 600 m
32. They developed guidelines for testing prototype IBOC system. NRSC
33. It is a reduction in the sound energy reflected by the surfaces of a room. Reflected sound
34. It is mainly concerned with qualities of sound. Acoustics
35. The microphone should respond equally to sound over the whole frequency range of. 20-20000 Hz
36. The microphone itself begins to act as a physical obstacle to sound waves for. Higher frequency
signal
37. Which of the following will provide an entry of the time the program begins and ends? Operating log
38. What band of frequencies was assigned to TV broadcasting service. 54 MHz to 890 MHz
39. Irregular surfaces or decorations help to. Absorb sound
40. One Sone is equivalent to how many Phons? 40
41. What is the antenna height limit for a class B FM station? 500 ft
42. To maximized the spectrum, the Eureka 147 uses. OFDM
43. For the aural transmission of TV station, what frequency swing is defined as 100% modulation? 25
KHz
44. In TV broadcast, what is the value of the aural carrier frequency? 4.75 MHz
45. What is the effect in hearing if the sound level changes by +10 dB? Negligible
46. It is the ratio between the values of the voltage of the wanted signal and the voltage of the
interference measured under specified conditions at the audio frequency output of the receiver. AF
signal to interference ratio
47. In TV broadcast, what type of vision modulation is used? A5C
48. What is the medium frequency broadcast band? 526.5 to 1705 KHz
49. In the medium frequency broadcast, what is the minimum frequency separation in any service area?
36 KHz
50. In AM broadcast, what tower heights are normally required to put up the standard obstruction
lighting and painting? 150 ft
51. It is a form of high pitch ringing in the ear. Tinnitus
52. How many FM stations are allowed to operate in Cebu? 25
53. What is the maximum ERP for a class A FM station? 125 KW
54. What is the maximum power allowable for an FM repeater of a communication, coordination, and
control link? 200 W
55. What is the bandwidth of the medium frequency broadcast channel? 9 KHz
56. In NTSC, what is the visual carrier frequency? 1.25 MHz
57. A double-glazed window with internal glass of mass 7 Kg/m^2 has an air gap of 20mm and is lined
with an acoustic absorbent. Find the approximate expected resonant.
58. In NTSC, the picture frequency in frame/sec. is 30
59. Calculate the SPrL of a sound at a distance of 10m from a uniformly radiating source of 1 watt of
power. 89 dB (duckrace)
60. The audible range is. 20 Hz to 20 KHz
61. The AM broadcast transmitter must be capable of delivering and maintaining its carrier power within
the required limit of. +/-10%
62. Which of the following it not a sound absorber. Glass
63. Based on KBP TV broadcasting standards, MTS means. Multi-channel TV Sound
64. Educational FM stations are allowed to operate with a transmitter output of how many watts? 10