Source (baseline-subtracted) amplitude vs. peak (source + baseline) level, both expressed in raw counts. Increasing raw counts on both axes reflect decreasing attenuation. Top panel: illustration of the test performed with 250 MHz bandwidth at a central observing frequency of 7.25 GHz. Different sources are indicated by different colors, as labeled in the panel. Bottom panel: illustration of the test performed with 1200 MHz bandwidth at a central observing frequency of 6.8 GHz. Here only the bright source 3C 286 (5.87 Jy at 6.8 GHz, Perley & Butler 2013) is shown, to highlight the levels of raw counts where saturation is reached.