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Electronics and Communication Engineering - Radio Receivers

Exercise : Radio Receivers - Section 1
21.
A transmitter serial current contains
carrier frequencies
audio frequencies
radio frequencies
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 25 MHz will be
24.09 MHz
24.54 MHz
25.45 MHz
25.91 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In a communication system, noise is most likely to affect the signal
at the transmitter
in the channel
in the information source
at the destination
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The noise produced by a resistor is proportional to
absolute temperature
(absolute temperature)2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
In a radio receiver, if the intermediate frequency is too high
Selectivity will be poor
Tracking difficulties will be least
Adjacent channel rejection will improve
All of the above will occur
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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