NSI DDS8800 DDS9800: Trouble Shooting
If the dimmer fires as such:
DMX Dimmers firing
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1 1 & 2
2 3
3 4
4 6
5 5 & 7
6 8
7 -
8 -

... Then the dimmer is set for 6 Channels: P3 MUST BE JUMPED for 8 Ch.