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Radio Receivers
One of the main functions of the RF amplifier in a superheterodyne receiver is to
Provide improved tracking
Improve the rejection of the image frequency
Permit better adjacent-channel rejection
Increase the tuning range of the receiver
Provide improved tracking
Improve the rejection of the image frequency
Permit better adjacent-channel rejection
Increase the tuning range of the receiver
Answer
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Related Question
Radio Receivers
A receiver has poor IF selectivity. It will therefore also have poor
Blocking
Double-spotting
Diversion reception
Sensitivity
Blocking
Double-spotting
Diversion reception
Sensitivity
Answer
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Radio Receivers
When a receiver has good blocking performance, this means that
It does not suffer from double-spotting
Its detector suffers from burnout
It is unaffected by AGC derived from nearby transmissions
Its image frequency rejection is poor
It does not suffer from double-spotting
Its detector suffers from burnout
It is unaffected by AGC derived from nearby transmissions
Its image frequency rejection is poor
Answer
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Radio Receivers
In a radio receiver with simple AGC
The faster the AGC time constant the more accurate the output
The highest AGC voltage is produced
An increase in signal strength produces more AGC
The audio stage gain is normally controlled by the AGC
The faster the AGC time constant the more accurate the output
The highest AGC voltage is produced
An increase in signal strength produces more AGC
The audio stage gain is normally controlled by the AGC
Answer
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Radio Receivers
If the intermediate frequency is very high (indicate false statement)
The local oscillator need not be extremely stable
Image frequency rejection is very good
Tracking will be improved
The selectivity will be poor
The local oscillator need not be extremely stable
Image frequency rejection is very good
Tracking will be improved
The selectivity will be poor
Answer
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Radio Receivers
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from
Inadequate selectivity at high frequencies
Instability
Insufficient gain and sensitivity
Gain variation over the frequency coverage range
Inadequate selectivity at high frequencies
Instability
Insufficient gain and sensitivity
Gain variation over the frequency coverage range
Answer
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