What does a receiver do?

What does a receiver do?

• A. Encrypts the received data
• B. Transmits signals to the antenna
• C. Amplifies the signal for better reception
• D. Demodulates the carrier wave to the received message, and can be a transceiver

Answer: (D)

The core idea here is that a receiver’s job is to pull the original information from the incoming signal. The essential step is demodulation, which takes the modulated carrier and returns the message that was sent—like converting a radio signal back into sound or data. In practice, a receiver often includes amplification and filtering to strengthen and clean up the weak signal before demodulation. Some devices combine receiving and transmitting capabilities, becoming a transceiver, so they can both receive and send signals. Other actions mentioned aren’t what a receiver is defined to do. Encrypting the data is a security step that happens after demodulation. Transmitting signals to the antenna is what a transmitter does. And while amplification helps reception, it doesn’t by itself recover the message without demodulation. So demodulating the carrier to retrieve the message (with the possibility of also functioning as a transceiver) is the correct description.

The core idea here is that a receiver’s job is to pull the original information from the incoming signal. The essential step is demodulation, which takes the modulated carrier and returns the message that was sent—like converting a radio signal back into sound or data. In practice, a receiver often includes amplification and filtering to strengthen and clean up the weak signal before demodulation. Some devices combine receiving and transmitting capabilities, becoming a transceiver, so they can both receive and send signals.

Other actions mentioned aren’t what a receiver is defined to do. Encrypting the data is a security step that happens after demodulation. Transmitting signals to the antenna is what a transmitter does. And while amplification helps reception, it doesn’t by itself recover the message without demodulation. So demodulating the carrier to retrieve the message (with the possibility of also functioning as a transceiver) is the correct description.