Expression 3 - ETC

Dimmer profiles
A dimmer profile is a variable level sent to a dimmer during a fade that is
related in some way to the percentage of fade completion. By varying the
dimmer profile, you can compensate for nonlinear characteristics or other
time-dependent variations in lighting instruments as well as warm
filaments more slowly to increase lamp life. Dimmer profiles are not
available for 16-bit channels, only for 8-bit channels.
A dimmer may have both a proportional level assigned to it as well as a
dimmer profile. 18 In the control sequence for a particular channel, the
channel’s level is first modified by the dimmer scaling, if different from
100%. Then the resulting dimmer level is modified during the channel’s
fade by the dimmer profile, if different from a linear profile, to yield the
dimmer’s final output.
The console has 33 dimmer profiles, of which 32 are editable. Profile 0,
the default profile, is a linear profile 19 and is not editable. Profiles 1
through 9 have preset, nonlinear profiles and are all editable. Profiles 10
through 32 default to linear profiles and are all editable.
Pre-defined profiles
0 - Linear (not editable)
1 - IES square
2 - Slow bottom
3 - Fast bottom
4 - Slow top
5 - Fast top
6 - Full at 1%
7 - Preheat at 5%
8 - Preheat at 10%
9 - Hot patch
18.
See Proportional patching, page 42, for information about how to
make the dimmer output proportional to a scaling factor.
19.
A linear profile is one that has an intensity level directly proportional to
the fade time at all points in the fade time. Thus, when the fade is
50% complete, the intensity level is 50% of the full value.
Expression 3 User Manual, v.3.1 45