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Communication Systems

Communication Systems
Full duplex operation permits transmission in both directions at the same time.

True
False

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Communication Systems
In Modulation, “carrier” is

Voltage for which frequency, phase or amplitude is varied
Voltage with constant frequency, phase or amplitude
Resultant wave
Speech voltage to be transmitted

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Communication Systems
FM transmitting and receiving equipment as compared to AM equipment is

Cheaper
Almost equally costly
Costly
None of these

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Communication Systems
The main function of a balanced modulator is to

Suppress carrier signal in order to create a single-sideband or double sideband
Produce 100% modulation
Produce balanced modulation of a carrier wave
Limit noise picked by a receiver

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Communication Systems
In practical commercial FM system, channel bandwidth is

88 MHz
100 kHz
108 MHz
150 kHz

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Communication Systems
A cordless telephone using separate frequencies for transmission in base and portable units is known as

Half duplex arrangement
Duplex arrangement
Either A or B
Neither A nor B

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