To quickly calculate the total loss of fiber optic cable within a minute's time, simply multiply the distance of the fiber by the cable's loss per kilometer, then add the amount lost due to various connector and splicing connections, and also include the overall safety buffer (3. To quickly calculate the total loss of fiber optic cable within a minute's time, simply multiply the distance of the fiber by the cable's loss per kilometer, then add the amount lost due to various connector and splicing connections, and also include the overall safety buffer (3. Use this worksheet to input values for all variables that will impact your system's performance. After entering your values, please ensure you click the 'Calculate Link Loss' button at the bottom of the page to generate your total link loss. This step is necessary to see if your system falls within. Attenuation is the opposite of amplification, and is normal when a signal is sent from one point to another. If the signal attenuates too much, it becomes unintelligible, which is why most networks require repeaters at regular intervals. Modal Dispersion. er optic system is a balancing act. It's important to remember that we are talking about a based upon a long list of elements. Following is a list of basic items used to determine gene pact. This page provides information about a Fiber Optic Loss calculator and the formulas used in its calculations.