Nt1310 Unit 4 Study Guide
Broadcasting and Acoustics 1. (Mar 1996) One-hundred twenty µbars of pressure variation is equal to
a) 120 dBspl
b) 115.56 dBspl
c) 41.58 dBspl
d) 57.78 dBspl
2. The color phasor has what phase for the I signal?
a) 180°
b) 37°
c) 90°
d) 57°
3. What is the allowable bandwidth of commercial AM radio in the United States?
a) 10 kHz
b) 37 kHz
c) 10MHz
d) 15 kHz
4. What information other than the sound has to be transmitted in TV transmission?
a) Visual signals
b) Synchronizing signals
c) Blanking pulses
d) all of the above
5. How many AM stations can be accommodated in a 150-kHz bandwidth if the highest modulating frequency is 10 kHz?
a) 10
b) 15
c) 7
7) 14 6. (Nov 1996) the maximum power suggested by KBP on …show more content…
Where is a degaussing coil in a TV set? a) Inside the CRT b) At the tuner c) Around tube face d) Around the IF amp 85. Sound is a wave motion of varying air_. a) Resistance b) Density c) Viscosity d) Pressure 86. Treble sound corresponds to a) Low frequencies b) Mid frequencies c) High frequencies d) Radio frequencies 87. The typical Output voltage from a magnetic microphone is a) 5 mV b) 50 mV c) 10 mV d) 1 mV 88. Two 4-Ω speakers connected in series have a total impedance of_. a) 2Ω b) 4Ω c) 8Ω d) 6Ω 89. What determines the rate of frequency swing for an FM broadcast transmitter? a) Modulation amplitude b) Modulation frequency c) Carrier amplitude d) Carrier frequency 90. What is the frequency swing of an FM broadcast transmitter when modulated 60%? a) ±75 kHz b) ± kHz c) ± kHz d) ± kHz 91. (Nov 1997) A large speaker having a large diameter (15cm. and above) a) Coaxial speaker b) Woofer c) Tweeter d) Triaxial speaker 92. (Nov 1997) what is the effect in over modulated amplitude modulated radio broadcasting transmission? a) Interference to adjacent channel b) Higher
a) 120 dBspl
b) 115.56 dBspl
c) 41.58 dBspl
d) 57.78 dBspl
2. The color phasor has what phase for the I signal?
a) 180°
b) 37°
c) 90°
d) 57°
3. What is the allowable bandwidth of commercial AM radio in the United States?
a) 10 kHz
b) 37 kHz
c) 10MHz
d) 15 kHz
4. What information other than the sound has to be transmitted in TV transmission?
a) Visual signals
b) Synchronizing signals
c) Blanking pulses
d) all of the above
5. How many AM stations can be accommodated in a 150-kHz bandwidth if the highest modulating frequency is 10 kHz?
a) 10
b) 15
c) 7
7) 14 6. (Nov 1996) the maximum power suggested by KBP on …show more content…
Where is a degaussing coil in a TV set? a) Inside the CRT b) At the tuner c) Around tube face d) Around the IF amp 85. Sound is a wave motion of varying air_. a) Resistance b) Density c) Viscosity d) Pressure 86. Treble sound corresponds to a) Low frequencies b) Mid frequencies c) High frequencies d) Radio frequencies 87. The typical Output voltage from a magnetic microphone is a) 5 mV b) 50 mV c) 10 mV d) 1 mV 88. Two 4-Ω speakers connected in series have a total impedance of_. a) 2Ω b) 4Ω c) 8Ω d) 6Ω 89. What determines the rate of frequency swing for an FM broadcast transmitter? a) Modulation amplitude b) Modulation frequency c) Carrier amplitude d) Carrier frequency 90. What is the frequency swing of an FM broadcast transmitter when modulated 60%? a) ±75 kHz b) ± kHz c) ± kHz d) ± kHz 91. (Nov 1997) A large speaker having a large diameter (15cm. and above) a) Coaxial speaker b) Woofer c) Tweeter d) Triaxial speaker 92. (Nov 1997) what is the effect in over modulated amplitude modulated radio broadcasting transmission? a) Interference to adjacent channel b) Higher