How is actual insertion loss determined for a two-way splitter?

Determining the actual insertion loss for a two-way splitter involves comparing the input signal level to the output signal level measured at one of the output ports. This process gives insight into how much signal is lost due to the inherent characteristics of the splitter itself. When measuring the input level and then measuring the output level at one of the ports, the difference between these two levels reflects the insertion loss caused by the splitter, which is a vital metric for assessing its performance.

The method ensures accurate representation of the loss, as it directly measures the reduction in signal strength across the splitter without the influences of other components or configurations. This approach is critical for technicians to ensure that system specifications are met and for troubleshooting any performance issues observed in the network.

Measuring the input level by itself and subtracting the output port levels, or adding them, would not yield an accurate representation of the loss as it does not account for the basic definition of insertion loss. Calculating power loss in watts also does not directly relate to the measurement of insertion loss in the case of comparing input and output levels, which is more straightforward and reflective of operational conditions.