Which of the following is used for modulation and demodulation?

Which of the following performs modulation and demodulation?

A

coaxial cable

B

modem

C

fiber optic

D

satellite

Demodulation is done in ___________

A

Receiving antenna

B

Transmitter

C

Radio receiver

D

Transmitting antenna

An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive

A

Single-sideband, suppressed-carrier

B

Single-sideband, reduced-carrier

C

ISB

D

Single-sideband, full-carrier

Demodulation is a process of

A

converting analog to digital signals

B

converting digital to analog signals

C

multiplexing various signals into one high speed line signals

D

performing data description.

Demodulation is the process of

A

converting digital signals to analog signals

B

converting analog signals to digital signals

C

combining many low speed channels into one high speed channel

D

dividing the high-speed signals into frequency bands

E

None of the above

One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

A

Improved efficiency

B

Better linearity

C

High power output per transistor

D

The lower modulating power requirement

For telegraphy the most commonly used modulation system is

A

FSK

B

Two tone modulation

C

PCM

D

Single tone modulation

In India, ___________ modulation is used for radio transmission

A

Frequency

B

Amplitude

C

Phase

D

None of the above

Which of the following represents the correct set of modulation classification?

A

Frequency, time period

B

Frequency, amplitude

C

Amplitude, wavelength

D

Wavelength, frequency

Which of the following is a digital modulation technique?

A

PCM

B

PSK

C

DM

D

All

Which of the following is used for modulation and demodulation?

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