Consider a superheterodyne receiver for standard AM radio.

a. Sketch a block diagram of the superheterodyne receiver showing the major blocks.

b. If you wish to receive a radio station at 1600 kHz, what local oscillator frequency is needed? (Let fIF = 455 kHz)

c. What is the "image station" we need to watch out for using this local oscillator frequency?

d. Sketch example spectra to illustrate how the local oscillator effectively shifts a transmitted signal spectrum centered at 1600 kHz to on that is centered at 455 kHz.