Each single line grouping below shows two 8 channel groups and one clock/qualifier for a total of 17 channels. 17 channel probes will contain one of these groups. Double line channel groupings show how channels are organized in a 34 channel probe. You will notice that the pairing changes going from 68 channels to 102 channels. Clocks and qualifiers are always assigned to the same channels regardless of module or mainframe type. For 34 channel modules: A2 A3 CK0 C2 C3 CK3 For 68 channel modules: A2 A3 CK0 C2 C3 CK3 A0 A1 CK1 D0 D1 CK2 For 102 channel modules: A2 A3 CK0 D2 D3 Q0 A0 A1 CK1 D0 D1 CK2 C2 C3 CK3 C0 C1 Q1 For 136 channel modules: A2 A3 CK0 D2 D3 Q0 A0 A1 CK1 D0 D1 CK2 C2 C3 CK3 C0 C1 Q1 E0 E1 Q2 E2 E3 Q3