The possibilities of second channel interference in a superheterodyne receiver can be reduced by
The answer is :- 1 Two if. stages, each at different frequencies, will give the advantage of low possibility of second channel interference and increased selectivity. The first stage must have a high if. to lessen the possibility of second channel interference. High selectivity is then achieved by the second low i.f., therefore i is wrong. ii and ill both aid the reduction of second channel interference.
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