Why is (BER) in the near distance its value (1e-54) and in the far distance its value is (1e-9)? Is there a law for these calculations, noting that I worked (simulation) on the (Optisystem software) ?
Atheer Adnan Salman, In general, the BER increases with transmission distance. This is because the signal weakens as it travels through the cable, making it more susceptible to noise and dispersion