Radio Receivers
In a broadcast superheterodyne receiver, the

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

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that

Adjacent-channel rejection is more difficult
The transmission is not compatible with A3E
Production of AGC is a rather complicated process
The receiver cannot use a phase comparator for AFC

ANSWER DOWNLOAD EXAMIANS APP