Skytec ST-1000 Mode D'emploi page 23

Channel A:
0-5% = off
6% - 89% = depending on channel B (volume)
90-100% = max. volume (100%)
Channel B:
0-100% = setting of the volume level
Example:
Set the start address 16 (see "DMX Add")
By means of the DMX controller set the address 16 to 0% and address
17 to 70%. Up to now, nothing will happen. Set address 16 to 95%.