insertion loss deviation (COM) (ILD)

Insertion Loss Deviation (ILD) is a characteristic value for transmission cables for highest data rates as used in backplane Ethernet with 40 and 100 Gigabit Ethernet.

Insertion Loss Deviation is the deviation of the insertion loss and is determined from the difference resulting from the expected highest value for the insertion loss( IL) and the actual determined value. When measuring the ILD value, the insertion loss is determined first, then the maximum deviation over a specified frequency range is calculated.

The insertion loss deviation (ILD) is included in the channel operation margin( COM) for the four or ten lanes for backplane Ethernet at 100 Gbit/s.