Radio Receivers
The controlled oscillator synthesizer is sometimes preferred over the direct one because

It does not require crystal oscillator
It is relatively free of spurious frequency
It is a simpler piece of equipment
Its frequency stability is better

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
In a radio receiver with simple AGC

The audio stage gain is normally controlled by the AGC
An increase in signal strength produces more AGC
The highest AGC voltage is produced
The faster the AGC time constant the more accurate the output

ANSWER DOWNLOAD EXAMIANS APP