An array of up to 512 complex H(f) linear representation values in linear scale for the respective transmission direction. It is designed to support up to 512 (downstream) subcarrier groups and can be retrieved in a single segment. The number of utilized values in the downstream direction depends on NSds; in the upstream direction, it depends on NSus. This value is referred to here as NS. Each array entry represents the imaginary component (referred to here as b(i)) of Hlin(f = i*Df) value for a particular subcarrier group index i (0 <= i <= NS). Hlin(f) is represented as ((scale/2^15)*((a(i)+j*b(i))/2^15)), where scale is xdsl2SCStatusLinScale and a(i) (provided by the xdsl2SCStatusSegmentLinReal object) and b(i) are in the range (-2^15+1) to (+2^15-1). A special value a(i)=b(i)= -2^15 indicates that no measurement

could be done for the subcarrier group because it is out of the passband or that the attenuation is out of range to be represented. This parameter is only available after a loop diagnostic procedure. Each value in this array is 16 bits wide and is stored in big endian format.