ETC Desire Series XTI v1.6.0 - Manual (Page 37)

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Operation 32
Linear
Linear has no curve. Brightness levels correlate exactly with the value of the dimming
control signal. Moderate lag in response for good dimming smoothness. Linear allows quick
jumps in brightness. It is best for studio lighting and applications with static scenes or looks.
Quick
Quick uses the standard dimming curve but with no lag or smoothing. All changes are
instant and correlated exactly with the control input signal. Quick is best for extreme high
impact and video-based control.
Output Frequency
Output Frequency is the frequency in Hz at which the LED array pulses, or blinks, as a
function of Pulse-Width Modulation (PWM). The frequency is adjustable in order to avoid
visible flicker on video and film. When altering the frequency in order to reduce noticeable
flicker on camera, often only a small change is required. The range is 920 to 30,000 Hz in
increments of 10. The default value is 1200 Hz.
For high speed exposure or rolling shutter cameras, use 25,000 Hz to increase the PWM
which will result in flicker-free operation in most circumstances.
Changing the frequency from the default value can have a slight impact on the smoothness,
color-mix consistency, or both when dimming.
Red Shift
Red shift allows the fixture to match its dimming performance to that of a conventional
tungsten lamp as it dims. The fixture automatically changes its apparent White Point, or
color temperature, as a function of overall intensity. Red shift works with both white-light
and colored-light output settings. It is also known as amber drift and tungsten shift. Red shift
is available only in the HSI and RGB profiles. It is not available on Studio Daylight and
Studio Tungsten fixtures.
White Point (Vivid, Lustr+, Fire, Ice, and Studio HD)
White Point controls the appearance (color temperature) of white-light output when
saturation is at or near zero. This option is available when using the HSI and RGB profiles.
The choices are 2950K, 3200K, 5600K, and 6500K.
DMX 0 255
Intensity
DMX 0 255
Intensity