Problem
When Using Dimmer Doubling, I Can Only Control the A Dimmers, not the B Dimmers
Solution
Remember that the B dimmers are actually DMX512 addresses 257-512. For this reason, the console should be set up to have enough dimmers to cover this range. This menu can be found within the "Setup: System Settings" menu of the console. For ease of use, set the number of dimmers to be 512.