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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
Increase the frequency stability of the synthesizer
Reduce the number of crystals required
Reduce the spurious frequency problem
Reduce the number of decades
Increase the frequency stability of the synthesizer
Reduce the number of crystals required
Reduce the spurious frequency problem
Reduce the number of decades
Answer
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Related Question
Radio Receivers
A receiver has poor IF selectivity. It will therefore also have poor
Diversion reception
Sensitivity
Double-spotting
Blocking
Diversion reception
Sensitivity
Double-spotting
Blocking
Answer
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Radio Receivers
Indicate which of the following circuits could not demodulate SSB:
BFO
Product modulator
Phase discriminator
Balance modulator
BFO
Product modulator
Phase discriminator
Balance modulator
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, full-carrier
ISB
Single-sideband, reduced-carrier
Single-sideband, suppressed-carrier
Single-sideband, full-carrier
ISB
Single-sideband, reduced-carrier
Answer
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Radio Receivers
The typical squelch circuit cuts off
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
An IF amplifier when the AGC is minimum
an audio amplifier when the carrier is absent
RF interference when the signal is weak
Answer
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Radio Receivers
Three-point tracking is achieved with
Double conversion
The padder capacitor
Variable selectivity
Double spotting
Double conversion
The padder capacitor
Variable selectivity
Double spotting
Answer
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