MLT-3 (Multilevel Transmission Encoding - 3 levels) is used by 100BASE-TX Ethernet.

MLT-3 interfaces emit less Electromagnetic interference and require less bandwidth than any binary (High/low) interfaces that operate at the same bit/s data rate. MLT-3 emits less EMI and requires less bandwidth than most other trinary interfaces, such as Alternate Mark Inversion.

MLT-3 cycles through -1, 0, +1, 0, -1, 0, +1, 0, ... etc. It moves to the next state to transmit a 1 bit, and stays in the same state to transmit a 0 bit.

Below you see an image taken from a Digital Oscilloscope.

Ethernet 100-Base-TX Signal -- Sampling Rate:2Gsps

== See also ==