Which of the following is not an advantage of digital communications over analogue?

The aspect that sets digital communications apart from analogue communications is the ability to transmit a signal in a binary format, which can lead to various advantages. One of these advantages is the capacity for error detection and correction. This feature allows digital communication systems to identify and rectify errors that may have occurred during transmission, enhancing the reliability of the communication.

Digital communications also facilitate the transmission of both voice and data over the same system. This compatibility makes them versatile and efficient, as multiple types of information can be sent using the same infrastructure.

Regarding the integrity of the transmitted signal, digital communications indeed produce a received signal that is a replica of the transmitted signal, assuming no errors occur during transmission. This characteristic is crucial for maintaining the fidelity of the information being communicated.

However, the assertion that digital communications require less bandwidth is not accurate. In fact, digital signals generally require more bandwidth than analogue signals to transmit the same amount of information. This discrepancy arises because digital signals are often more complex and may involve the use of multiple bits to represent the same information that could be transmitted with fewer bits in analogue form. Thus, the answer correctly identifies that requiring less bandwidth is not an advantage of digital communications over analogue.