1)

In a communication system, a repeater is used to extend the range to transmission. It is the combination of 


A) IF stage and amplifier

B) rectifier and detector

C) recevier and transmitter

D) modulator and power amplifier

Answer:

Option C

Explanation:

 A repeater is a combination of at least one transmitter, one receiver and one carrier operated relay (COR) configured in a  manner where a signal is received and the transmitter rebroadcasts the received signal on another frequency.