Unlike quadrature encoders that repeat the same 4 states over a revolution, absolute encoders generate a unique digital ‘word’ for each position in its stated resolution. Because many absolute encoders are digital devices, resolution is expressed as an exponent of 2, otherwise known as binary. The numbers on the right of the absolute output illustration represent the numeric value of the bit when it is ‘on’ or ‘high’. A 6-bit (2⁶) absolute encoder can generate 64 unique, digital ‘words’ that represent 64 positions over one revolution. Five positions are illustrated above. At the blue line, only the 2⁰ bit is high, so the output is 1. At the green line, the 2⁰, 2¹ and 2² bits are high: 1+2+4=7.