Coding Formats

• Nonreturn-to-Zero-Level (NRZ-L) 0= high level 1= low level

• Nonreturn to Zero Inverted (NRZI) 0= no transition at beginning of interval (one bit time) 1= transition at beginning of interval

• Manchester 0=transition from high to low in middle of interval 1= transition from low to high in middle of interval

• Differential Manchester Always a transition in middle of interval 0= transition at beginning of interval 1= no transition at beginning of interval

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