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Electronics and Communication Engineering - Radio Receivers

Exercise : Radio Receivers - Section 1
11.
Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz
30, 60 and 70 kHz
3, 6 and 7 kHz
30, 60 and 70 MHz
3, 6 and 7 GHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In a ratio detector
the linearity is worse than in a phase discriminator
the output is twice that obtainable from a similar phase discriminator
stabilization against signal strength variations is provided
the circuit is the same as in a discriminator, except that the diodes are reversed
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Neutralization is used in RF amplifiers to
stop oscillation
increase bandwidth
improve selectivity
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
When fs is the signal frequency and fi is the intermediate frequency, then image frequency fsi is given by
fsi = fs - 2fi
fsi = fs + 2fi
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude
will increase
will decrease
will remain constant
will reduce to negligible value
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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