What is the purpose of "differential signaling" (e.g., used in RS-485 or USB) compared to single-ended signaling, especially in noisy industrial environments?
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The correct answer is A) Differential signaling transmits a signal as the difference between two complementary wires, so common-mode noise affecting both wires equally is rejected by the receiver, improving noise immunity over long cable runs
Correct Answer
Differential signaling transmits a signal as the difference between two complementary wires, so common-mode noise affecting both wires equally is rejected by the receiver, improving noise immunity over long cable runs
By encoding a signal as the voltage difference between two wires carrying complementary signals, differential receivers can subtract out noise that affects both wires similarly (common-mode noise), making protocols like RS-485 robust over long industrial cable runs.