Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is wrong but R is correct

A is correct but R is wrong

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is wrong but R is correct

A is correct but R is wrong

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Communication Systems
Which one of the following is analog?

Delta modulation

Differential PCM

PCM

PWM

Delta modulation

Differential PCM

PCM

PWM

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Communication Systems
A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is

15

16

8

1

15

16

8

1

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Communication Systems
The main function of a balanced modulator is to

Limit noise picked by a receiver

Suppress carrier signal in order to create a single-sideband or double sideband

Produce balanced modulation of a carrier wave

Produce 100% modulation

Limit noise picked by a receiver

Suppress carrier signal in order to create a single-sideband or double sideband

Produce balanced modulation of a carrier wave

Produce 100% modulation

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Communication Systems
DVD uses

Laser beam for both recording and playback

None of these

Laser beam for recording and video head for playback

Video head for recording and laser beam for playback

Laser beam for both recording and playback

None of these

Laser beam for recording and video head for playback

Video head for recording and laser beam for playback

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Communication Systems
For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as

3E

4E

6E

2E

3E

4E

6E

2E

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Communication Systems

Communication Systems Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Communication Systems Which one of the following is analog?

Communication Systems A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is

Communication Systems The main function of a balanced modulator is to

Communication Systems DVD uses

Communication Systems For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as

Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Communication Systems
Which one of the following is analog?

Communication Systems
A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is

Communication Systems
The main function of a balanced modulator is to

Communication Systems
DVD uses

Communication Systems
For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as