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Electronics and Communication Engineering - Radio Receivers

Exercise : Radio Receivers - Section 1
6.
In a broadcast superheterodyne receiver
the local oscillator operates below the signal frequency
local oscillator frequency is normally double the IF
RF amplifier normally works at kHz above the carrier frequency
mixer input must be tuned to the signal frequency
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A duplexer is a device used to
feed more than one receiver from a single antenna
connect two transmitters to the same antenna
connect a receiver and a transmitter to the same antenna
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A heterodyne frequency changer is called a
Modulator
Mixer
Demodulator
Frequency translator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
RF amplifiers are used in radio receivers for
improved image frequency rejection
improved rejection of adjacent unwanted signals
prevention of re-radiation of the local oscillator through the antenna of the receiver
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The sensitivity curve of a standard receiver is represented by
curve A
curve B
curve C
curve D
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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