RADIO RECEIVERS QUIZ

The audio stage gain is normally controlled by the AGC

The highest AGC voltage is produced

An increase in signal strength produces more AGC

The faster the AGC time constant the more accurate the output

Much easier alignment

Fewer tuned circuits

Better linearity

Greater limiting

Permit better adjacent-channel rejection

Provide improved tracking

Increase the tuning range of the receiver

Improve the rejection of the image frequency

the circuit is the same as in a discriminator, except that the diodes are reversed

stabilization against signal strength variations is provided

the linearity is worse than in phase discriminator

the output is twice that obtainable from a similar phase discriminator

Because otherwise an intermediate frequency could not be produced

To allow adequate frequency coverage without switching

To permit easier tracking

To help the image frequency rejection

Is created within the receiver itself

Is not rejected be the IF tuned circuits

Is due to insufficient adjacent channel rejection

Is independent of the frequency to which the receiver is tuned

An IF amplifier when the AGC is minimum

RF interference when the signal is weak

An IF amplifier when the AGC is maximum

an audio amplifier when the carrier is absent

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.

Double conversion is used to improve image rejection

Variable sensitivity is used to eliminate selective fading

Variable sensitivity

Variable selectivity

Double conversion

Squelch

Insufficient gain and sensitivity

Instability

Gain variation over the frequency coverage range

Inadequate selectivity at high frequencies