The Radio Receiver
In the block diagram of the receiver shown, the "RF amplifier"
-
decreases random fluctuation noise
-
is a restoring filter amplifier
-
Correct Answerincreases the incoming signal level
-
changes the signal frequency
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "mixer"
-
Correct Answercombines signals at two different frequencies to produce one at an intermediate frequency
-
combines sidebands to produce a stronger signal
-
discriminates against SSB and AM signals
-
inserts a carrier wave to produce a true FM signal
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the output frequency of the "oscillator" is
-
the same as that of the incoming received signal
-
the same as that of the IF frequency
-
Correct Answerdifferent from both the incoming signal and IF frequencies
-
at a low audio frequency
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "filter" rejects
-
AM and RTTY signals
-
Correct Answerunwanted mixer outputs
-
noise bursts
-
broadcast band signals
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "IF amplifier" is an
-
isolation frequency amplifier
-
intelligence frequency amplifier
-
indeterminate frequency amplifier
-
Correct Answerintermediate frequency amplifier
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "product detector"
-
produces an 800 Hz beat note
-
separates CW and SSB signals
-
rejects AM signals
-
Correct Answertranslates signals to audio frequencies
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "AF amplifier"
-
rejects AM and RTTY signals
-
Correct Answeramplifies audio frequency signals
-
has a very narrow passband
-
restores ambiance to the audio
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "BFO" stands for
-
bad frequency obscurer
-
basic frequency oscillator
-
Correct Answerbeat frequency oscillator
-
band filter oscillator
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, most of the receiver gain is in the
-
RF amplifier
-
Correct AnswerIF amplifier
-
AF amplifier
-
mixer
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "RF amplifier"
-
decreases random fluctuation noise
-
masks strong noise
-
Correct Answershould produce little internal noise
-
changes the signal frequency
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "mixer"
-
Correct Answerchanges the signal frequency
-
rejects SSB and CW signals
-
protects against receiver overload
-
limits the noise on the signal
This question does not yet have an explanation!
Register to add one
In the receiver shown, when receiving a signal, the output frequency of the "oscillator" is
-
the same as that of the signal
-
the same as that of the IF amplifier
-
Correct Answerof constant amplitude and frequency
-
passed through the following filter
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the "limiter"
-
Correct Answerlimits the signal to a constant amplitude
-
rejects SSB and CW signals
-
limits the frequency shift of the signal
-
limits the phase shift of the signal
The demodulator will usually be a "discriminator" and may even be of a "phase-lock-loop" variety. There will be a "limiter" before the descriminator to remove noise peaks and amplitude-changes before detection of the FM signal
Last edited by cmscouler. Register to edit
In the block diagram of the receiver shown, the "frequency demodulator" could be implemented with a
-
product detector
-
Correct Answerphase-locked loop
-
full-wave rectifier
-
low-pass filter
The demodulator will usually be a "discriminator" and may even be of a "phase-lock-loop" variety.
Last edited by cmscouler. Register to edit
In the block diagram of the receiver shown, the "AF amplifier"
-
amplifies stereo signals
-
Correct Answeramplifies speech frequencies
-
is an all frequency amplifier
-
must be fitted with a tone control
This question does not yet have an explanation!
Register to add one
In this receiver, an audio frequency gain control would be associated with the block labelled
-
Correct AnswerAF amplifier
-
frequency demodulator
-
speaker, phones
-
IF amplifier
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the selectivity would be set by the
-
AF amplifier
-
mixer
-
limiter
-
Correct Answerfilter
This question does not yet have an explanation!
Register to add one
In the FM communications receiver shown in the block diagram, the "filter" bandwidth is typically
-
3 kHz
-
Correct Answer10 kHz
-
64 kHz
-
128 kHz
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, an automatic gain control (AGC) circuit would be associated with the
-
Speaker
-
Correct AnswerIF amplifier
-
RF filter
-
Oscillator
This question does not yet have an explanation!
Register to add one
In the block diagram of the receiver shown, the waveform produced by the "oscillator" would ideally be a
-
square wave
-
pulsed wave
-
Correct Answersinewave
-
hybrid frequency wave
This question does not yet have an explanation!
Register to add one