-- card: 98622 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 7720
-- name: #319
----- HyperTalk script -----
on openCard
  global group,rightone
  put 31 into group
  put "B" into rightone
  pass openCard
end openCard



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Question #31

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4BG-4B.1 How can "selectivity" be achieved in the front-end circuitry of a communications receiver?

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By using an audio filter

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By using a preselector

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By using an additional RF amplifier stage

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By using an additional IF amplifier stage

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Correct answer is B