Discussion
Which of the following is not an advantage of the superheterodyne architecture?
Freedom from spurious responses
Uniform selectivity across the tuning range
High and stable gain at one fixed frequency
Selectivity that can be set by a single filter
Answer: C
Freedom from spurious responses is not among its advantages - the architecture actually creates them, the image being the most important, because a mixer will combine any pair of frequencies whose harmonics differ by the intermediate frequency. The other three are its genuine benefits. An architecture chosen for good reasons still brings its own characteristic problems, and honest comparison requires listing both.
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