Definition: The amount of signal power lost as light passes through the splitter, measured in decibels (dB). For example, a 1:2 PLC splitter typically has an insertion loss of ~3dB, while a 1:32 splitter may have. Start with the theoretical split loss, which depends only on the number of outputs. Next, add termination losses for every connector pair and splice along the branch. Passive split links usually lose the most dB at the splitter, so we keep the optical budget and the installed route separate., 2 inputs split into 8 outputs). Used in networks where two separate signals (e., data and video) need distribution.