Question 11 : In a balanced mixer, the output _________
1. contains equal amount of all input frequencies
2. does not contain the input frequencies
3. contains the input frequencies
4. is a non-linear mixture of input signals
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Question 12 : What is represented by 'Figure Of Merit'?
1. how much noise is in the channel
2. how much noise is in the communication system
3. how much noise an amplifier adds to the signal
4. signal to noise ratio in dB
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Question 13 : Adding bits to synchronize one digital signal to another is called _________
1. WDM
2. TDM
3. Bit stuffing
4. Bit synchronization
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Question 14 : What is the full form of FITL ________
1. Fiber Input Timing Loss
2. Fibre Impedance To The Loop
3. Fiber Input Timing Loop
4. Fiber In The Loop
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Question 15 : The loss in single-mode fiber optic cable due to the connector is about ________
1. 0.2 dB per km
2. 0.02 dB per km
3. 0.0002 dB per km
4. 2 dB per km
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Question 16 : The loss in single-mode fiber optic cable due to the splice is about ________
1. 0.2 dB per km
2. 0.02 dB per km
3. 0.0002 dB per km
4. 2 dB per km
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Question 17 : The loss in single-mode fiber optic cable due to the glass is about ________
1. 40 dB per km
2. 0.4 dB per km
3. zero
4. 100 dB per km
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Question 18 : A cordless telephone that uses separate frequencies for transmission in a base and portable units is called _________
1. half duplex
2. duplex
3. simplex
4. neither duplex nor simplex
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Question 19 : Scattering causes _________
1. refraction
2. loss
3. dispersion
4. reflection
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Question 20 : Fiber-optic cable can be used to connect a transmitter to an antenna.
1. True
2. False
3.
4.
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