Table 3.

Patterns of error for the ECC generator

Positions	Change	Pattern
c2, c3	Single	00100
c4, p +	Single	00001
c1, c4	Triple	01110
c1, p +	Quadruple	01111

All possible patterns of error caused in corrected base-space sequence by a single wrongly corrected error in the observed sequence of type +d (where d=1, αor β). The ‘Positions’ column indicates all possible pairs of positions at which an error can occur and be wrongfully corrected; it is not necessary to identify which member of the pair corresponds to which form of error as the resulting pattern is the same. In all cases the error pattern should be multiplied element-wise by the error type (d) to get the actual pattern (e.g. a wrongly corrected + βerror at _c2results in an error pattern of 00β00).