In Blue, E channel is mapped to H channel C, and they share the same ADC. That is automatic, and the Lowest Threshold on either will be the threshold for both. H channels A and B don't share an ADC with any E channels, as was the case with RED. There is no function to enable or disable on BLUE. On station setup page, (User page on Blitzortung) the H channels should ALWAYS be inputs 0,1,2 ( if third antenna used, otherwise 2 will be 'undefined'). E channel is ALWAYS input 3, with 4,5 always 'undefined'... If not using E then input 3 will be 'undefined' also. That's for BLUE. That configuration info is very important.