Question

In a single-frequency radio, transmissions can occur in either direction but not simultaneously in both. When one party transmits, the other can only receive, and the party that is transmitting is unable to receive. What is the characteristic of a single-frequency radio transmission?

1) Transmissions can occur simultaneously in both directions
2) Both parties can transmit and receive at the same time
3) When one party transmits, the other can only receive
4) The party that is transmitting can also receive

Answer 1

In a single-frequency radio system, the characteristic where one party transmits and the other only receives is known as half-duplex communication. In radio transmissions such as AM and FM, information is encoded by modulating either the amplitude or the frequency of the carrier wave, respectively.

Step-by-step explanation:

The characteristic of a single-frequency radio transmission where when one party transmits, the other can only receive, and the party that is transmitting is unable to receive is known as half-duplex communication. This type of communication does not allow for simultaneous transmission and reception of signals on the same frequency.

This is in contrast to full-duplex systems, where transmission and reception can occur at the same time. Radio transmissions, whether AM or FM, involve modulating a carrier frequency in one way or another to encode information. In AM (amplitude modulation), the amplitude of the carrier wave is varied, whereas in FM (frequency modulation), the frequency of the carrier wave is varied, but its amplitude remains constant.