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Which risk escalates within a tuned radio frequency (TRF) receiver when component aging shifts resonant frequency?

A)Amplitude modulation distortion increases rapidly
B)Image frequency rejection drastically declines
C)Automatic gain control wildly oscillates
D)Local oscillator signal phase noise amplified

💡 Explanation

Decreased image frequency rejection happens because detuning weakens the selectivity via decreased impedance to unwanted signals; therefore, closely-spaced spurious emissions interfere, because signal discrimination relies heavily on selective filtering to reject undesired frequencies rather than AGC limitations.

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