Discussion
Which of the following is not a property of the intermediate frequency strip?
Image rejection
High gain
Adjacent channel selectivity
Fixed centre frequency
Answer: C
Image rejection is not among them, because the image arrives at the intermediate frequency itself and the strip cannot distinguish it from the wanted signal. The other three are exactly what the strip provides, and they are what makes concentrating the receiver's work at a fixed frequency worthwhile. Knowing what a stage cannot do is as useful as knowing what it can, and here that limitation is the reason the preselector exists.
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