(a)Exhibits a threshold (b)Is independent of modulation index (c)Is generally poorer than that of an AM system (d)Is independent of signal-to-noise ratio
Answer
Answer : (a)
Explanation
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Noise in Communication Systems » Exercise - 18. The ionosphere consists of ……. Layer. (a) Positive charge (b) Negative charge (c) Neutral (d) Any of the other