Radio Receivers
If the intermediate frequency is very high (indicate false statement)

Tracking will be improved
Image frequency rejection is very good
The selectivity will be poor
The local oscillator need not be extremely stable

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Radio Receivers
In a broadcast superheterodyne receiver, the

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

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Radio Receivers
In a radio receiver with simple AGC

The faster the AGC time constant the more accurate the output
The highest AGC voltage is produced
The audio stage gain is normally controlled by the AGC
An increase in signal strength produces more AGC

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

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

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