Radio Receivers
A low ratio of the ac to the dc load impedance of a diode detector results in

Poor AGC operation
Diagonal clipping
Negative-peak clipping
Poor AF response

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Radio Receivers
In a broadcast superheterodyne receiver, the

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

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

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.
Double conversion is used to improve image rejection

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