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 ratio detector

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

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

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

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