A superheterodyne receiver is to operate in the frequency range 550 kHz - 1650 kHz, with the intermediate frequency of 450 kHz. Let denote the required capacitance ratio of the local oscillator and I denote the image frequency (in kHz) of the incoming signal. If the receiver is tuned to 700 kHz, then-A-R = 4.41 J =1600B-R = 2.10 J =1150C-R = 3.0 J =1600D-R = 9.0 J =1150-A-R = 4.41 J =1600

Question

A superheterodyne receiver is to operate in the frequency range 550 kHz - 1650 kHz, with the intermediate frequency of 450 kHz. Let  denote the required capacitance ratio of the local oscillator and I denote the image frequency (in kHz) of the incoming signal. If the receiver is tuned to 700 kHz, then-A-R = 4.41 J =1600B-R = 2.10 J =1150C-R = 3.0 J =1600D-R = 9.0 J =1150-A-R = 4.41 J =1600

APTITUDE CRACK · Accepted Answer

A R = 4.41 J =1600  Image frequency = 700 + 2 x 450 1600 kHz fmax = 1650 + 450 2100 kHz fmin = 550 kHz + 450 1000 kHz R = 4.41, I = 1600 kHz.

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