Full Name: Insertion loss, expressed in db (decibels).
IL = 20 lg (Uo / Ui), where IL is the insertion loss, Uo is the output signal, and Ui is the input signal.
The insertion loss in the optical system refers to the ratio of the output light intensity to the incident light intensity transmitted through the inserted device.
Insertion loss is the signal loss of inserted cable or components between the transmitter and the receiver, usually refers to the attenuation. The insertion loss is represented by the corresponding decibel (db) of the received signal level.
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