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Radio Receivers
Indicate the false statement in connection with communications receivers.
Double conversion is used to improve image rejection
A product demodulator could be used for the reception of Morse code.
The noise limiter cuts off the receiver’s output during a noise pulse.
Variable sensitivity is used to eliminate selective fading
Double conversion is used to improve image rejection
A product demodulator could be used for the reception of Morse code.
The noise limiter cuts off the receiver’s output during a noise pulse.
Variable sensitivity is used to eliminate selective fading
Answer
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Related Question
Radio Receivers
The image frequency of a superheterodyne receiver
Is not rejected be the IF tuned circuits
Is created within the receiver itself
Is due to insufficient adjacent channel rejection
Is independent of the frequency to which the receiver is tuned
Is not rejected be the IF tuned circuits
Is created within the receiver itself
Is due to insufficient adjacent channel rejection
Is independent of the frequency to which the receiver is tuned
Answer
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Radio Receivers
Three-point tracking is achieved with
Double conversion
The padder capacitor
Double spotting
Variable selectivity
Double conversion
The padder capacitor
Double spotting
Variable selectivity
Answer
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Radio Receivers
Indicate which of the following circuits could not demodulate SSB:
Balance modulator
BFO
Phase discriminator
Product modulator
Balance modulator
BFO
Phase discriminator
Product modulator
Answer
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Radio Receivers
The controlled oscillator synthesizer is sometimes preferred over the direct one because
It does not require crystal oscillator
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
Its frequency stability is better
It is a simpler piece of equipment
It is relatively free of spurious frequency
Answer
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Radio Receivers
The typical squelch circuit cuts off
An IF amplifier when the AGC is minimum
an audio amplifier when the carrier is absent
RF interference when the signal is weak
An IF amplifier when the AGC is maximum
An IF amplifier when the AGC is minimum
an audio amplifier when the carrier is absent
RF interference when the signal is weak
An IF amplifier when the AGC is maximum
Answer
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