Radio Receivers
Indicate the false statement in connection with communications receivers.

Double conversion is used to improve image rejection
Variable sensitivity is used to eliminate selective fading
A product demodulator could be used for the reception of Morse code.
The noise limiter cuts off the receiver’s output during a noise pulse.

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Radio Receivers
In a broadcast superheterodyne receiver, the

RF amplifier normally works at 455 kHz above the carrier frequency
Local oscillator frequency is normally double the IF
Mixer input must be tuned to the signal frequency
Local oscillator operates below the signal frequency

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