Radio Receivers
The controlled oscillator synthesizer is sometimes preferred over the direct one because

Its frequency stability is better
It is a simpler piece of equipment
It is relatively free of spurious frequency
It does not require crystal oscillator

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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
Adjacent-channel rejection is more difficult
The receiver cannot use a phase comparator for AFC

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Radio Receivers
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency

To permit easier tracking
To allow adequate frequency coverage without switching
Because otherwise an intermediate frequency could not be produced
To help the image frequency rejection

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