FEC2-V3-1 --------- nocables connected FEC2-V3-2 --------- cables connected shielded FEC grounded with shieldbox FEC3-V3-1 --------- nocables connected FEC3-V3-2 --------- cables connected shielded FEC grounded with shieldbox on FEC2 is one channel - 248 in the plots = 120 on the FEC strange. The pedestal is far off and the rms is independent on of there is a cable connected or not. pulse with a thread winded around the cables. No shieldbox. maxchadc = x-axis maximum adc value, y-axis ALTRO channel maxchtime = x-axis time sample for the maximum adc value, y-axis ALTRO channel PCA settings gain3 shaper7 dac2500: fec3-1-hmaxchadc.ps.gz fec3-1-hmaxchtime.ps.gz PCA settings gain0 shaper0 dac0: fec3-2-hmaxchadc.ps.gz fec3-2-hmaxchtime.ps.gz The files are compressed since they are big. If the browser do not uncompress it automatically, download the file and unpack it (e.g. winzip on windows).