Here is a link to the Mixmaster manual:
Place the negative fired cylinders on one bank of the Mixmaster and the positively fired ones on the other bank.
The position of the A/A+B switch depends on how you want to view the signals. The A position splits the ignition output between the A and B outputs of the Mixmaster. The A+B position outputs both banks on A.
The B/over-score B switch inverts the B bank in the over-score B position. You can also accomplish this with PicoScope by choosing the appropriate custom probe if you split banks. You will need to use this switch if outputting all on A so they can all be oriented the same.
The A/A+B out can go to channel A on the scope and B out to channel B. You can then use ch C for trigger out. It will output the signal for the cylinder placed in the Bank A #1 position.
THE PicoScope Automotive Authority
In North America