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G7C09
What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?
Pick an answer to check it.
Answer: B. 90 degrees
I (in-phase) and Q (quadrature) signals are 90 degrees apart. Quadrature means a quarter of a cycle, which is 90 degrees.
Tip: Quadrature = quarter cycle = 90 degrees.