Agilent uses a binary-weighting scheme to determine the break points between seven different colors. The next hottest color turns on when the accumulator changes the next most significant bit from 0 to 1. Thus, you get finer color-change resolution at lower counts. Scopes that have this adjustment let you set the level at which the pixel accumulators saturate. Adjusting the saturation point lets you see details that otherwise get lost.
Color gradients show distribution of pixel hits in a constellation diagram.
Figure 4 and Figure 5 demonstrate the use of saturation levels. Both figures contain data from the same data set. The figures demonstrate the saturation adjustment used to measure the pulse's output from an x-ray detector. The amplitude of the pulse indicates the composition of the alloy. Each element produces a unique amplitude.