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Desire D40/D60 XTI v1.8.0 User Manual
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
