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Radio Receivers
A low ratio of the ac to the dc load impedance of a diode detector results in
Diagonal clipping
Negative-peak clipping
Poor AF response
Poor AGC operation
Diagonal clipping
Negative-peak clipping
Poor AF response
Poor AGC operation
Answer
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Related Question
Radio Receivers
The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to
Reduce the number of crystals required
Increase the frequency stability of the synthesizer
Reduce the spurious frequency problem
Reduce the number of decades
Reduce the number of crystals required
Increase the frequency stability of the synthesizer
Reduce the spurious frequency problem
Reduce the number of decades
Answer
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Radio Receivers
In a ratio detector
the output is twice that obtainable from a similar phase discriminator
stabilization against signal strength variations is provided
the circuit is the same as in a discriminator, except that the diodes are reversed
the linearity is worse than in phase discriminator
the output is twice that obtainable from a similar phase discriminator
stabilization against signal strength variations is provided
the circuit is the same as in a discriminator, except that the diodes are reversed
the linearity is worse than in phase discriminator
Answer
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Radio Receivers
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
Production of AGC is a rather complicated process
The receiver cannot use a phase comparator for AFC
The transmission is not compatible with A3E
Adjacent-channel rejection is more difficult
Production of AGC is a rather complicated process
The receiver cannot use a phase comparator for AFC
The transmission is not compatible with A3E
Adjacent-channel rejection is more difficult
Answer
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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
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
Answer
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Radio Receivers
An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive
Single-sideband, suppressed-carrier
Single-sideband, reduced-carrier
Single-sideband, full-carrier
ISB
Single-sideband, suppressed-carrier
Single-sideband, reduced-carrier
Single-sideband, full-carrier
ISB
Answer
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