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

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

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Radio Receivers
In a ratio detector

stabilization against signal strength variations is provided
the linearity is worse than in phase discriminator
the output is twice that obtainable from a similar phase discriminator
the circuit is the same as in a discriminator, except that the diodes are reversed

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