Radio Receivers
An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive

Single-sideband, reduced-carrier
ISB
Single-sideband, full-carrier
Single-sideband, suppressed-carrier

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Radio Receivers
Show which of the following statements about the amplitude limiter is untrue:

When the input increases past the threshold of the limiting, the gain decreases to keep the output constant.
The output must be tuned
The circuit is always biased in class C, by virtue of the leak-type bias.
Leak-type bias must be used

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

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

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