What does Error Vector Magnitude (EVM) express?

Error Vector Magnitude (EVM) is a crucial metric used in digital communications to measure the quality of a received signal by quantifying the difference between the ideal transmitted signal and the actual received signal. EVM is expressed as a percentage or in decibels and reflects the deviations caused by noise, interference, and other factors affecting signal integrity.

The correct response accurately highlights that EVM represents the average error in the received signal relative to the expected peak signal magnitude. By assessing EVM, technicians can determine how closely the received signal matches the original transmitted signal, which is critical for ensuring effective communication.

Understanding EVM is important for evaluating system performance, as lower EVM values correspond to better signal quality and higher data integrity. This depth of understanding is essential for professionals in wireless communication, where maintaining signal quality is key to optimal functioning.