Standard deviation of the real part of the visibilities along frequency and baselines, as a function of time for different calibration trials. At each successive trial, only one setting was changed in order to understand its impact on the calibration. Trial 1 is the result of a fulljones calibration with Cyg A and Cas A subtracted when they are at elevations above 10 degrees. The subsequent changes in the other trials are described as follows. Trial 2: MAs 62, 64, 72 flagged, Trial 3: A-team included till 0 degree elevation, Trial 4: Tau A included, Trial 5: MA 6 flagged, Trial 6: MA 18 flagged, Trial 7: Vir A included, Trial 8: Calibration done in the diagonal mode.