NEXT measures unwanted signal coupling from a transmitter at which end of the circuit?

The Network Equipment Test (NEXT) measures unwanted signal coupling from a transmitter at the near end of the circuit. This is crucial because it assesses how much of the transmitted signal is being affected by noise or crosstalk from adjacent pairs within the cable. The testing is conducted at the near end to determine the quality and integrity of the signal before it travels down the line to the far end. By measuring at this point, technicians can identify issues that may impact performance and allow for troubleshooting or improvements without waiting for the signal to reach the other end of the circuit.

In contrast, tests at the far end would generally be focused on different performance metrics related to the overall link, such as attenuation or return loss, rather than directly evaluating the interference or coupling that occurs close to the source of the signal. Therefore, the focus on the near end for NEXT testing is fundamental to ensuring reliable data transmission and maintaining the integrity of the communication link.