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Radio Receivers
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of
Reducing the effect of negative-peak clipping
Improving the effectiveness of the AGC
Improving the selectivity of the receiver
Reducing the effect of noise at low modulation depths
Reducing the effect of negative-peak clipping
Improving the effectiveness of the AGC
Improving the selectivity of the receiver
Reducing the effect of noise at low modulation depths
Answer
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Related Question
Radio Receivers
A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
1650 kHz
2100 kHz
750 kHz
900 kHz
1650 kHz
2100 kHz
750 kHz
900 kHz
Answer
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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 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
Reduce the number of crystals required
Increase the frequency stability of the synthesizer
Answer
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Radio Receivers
The image frequency of a superheterodyne receiver
Is not rejected be the IF tuned circuits
Is due to insufficient adjacent channel rejection
Is created within the receiver itself
Is independent of the frequency to which the receiver is tuned
Is not rejected be the IF tuned circuits
Is due to insufficient adjacent channel rejection
Is created within the receiver itself
Is independent of the frequency to which the receiver is tuned
Answer
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Radio Receivers
Indicate which of the following circuits could not demodulate SSB:
Product modulator
BFO
Phase discriminator
Balance modulator
Product modulator
BFO
Phase discriminator
Balance modulator
Answer
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Radio Receivers
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
Adjacent-channel rejection is more difficult
The receiver cannot use a phase comparator for AFC
Production of AGC is a rather complicated process
The transmission is not compatible with A3E
Adjacent-channel rejection is more difficult
The receiver cannot use a phase comparator for AFC
Production of AGC is a rather complicated process
The transmission is not compatible with A3E
Answer
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