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Radio Receivers

41.

Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz

Answer: C

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42.

Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?

Answer: B

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43.

Which of the following noise does not occur in transistors?

Answer: A

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44.

The passband of the tuned circuits of a radio receiver should be equal to

Answer: A

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45.

Neutralization is used in RF amplifiers to

Answer: A

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Answer: D

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47.

A communication channel with additive white Gaussian noise, has a bandwidth of 4 kHz and an SNR of 15. Its channel capacity is

Answer: B

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48.

An arbitrary signal m (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is

Answer: B

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49.

Superheterodyne receiver can be used in

Answer: D

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Answer: D

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