ETC Cobalt Family v7.0.0 - Manual (Page 306)

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16 Bit Control - Fine Step
Devices with 16 bit control rarely use all 16 bits. Therefore it is possible to fine tune the resolution of
this parameter in the cell Fine Step in the Template Editor.
Full 16 bit control, which few Devices use (generally Media Servers, for example Catalyst) require
this value to be set to 1 (default = 4).