ETC Desire Series User Manual page 61

Output Freq
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 1500 Hz in increments of 10. The default value is 1200 Hz.
For high speed exposure or rolling shutter cameras, use the High 25K mode. This increases the PWM
to 25,000 Hz and will result in flicker-free operation in most circumstances. To access the High 25K,
press the up arrow after reaching 1500 Hz in the Output Freq: field.
Changing the frequency from the default value can have a slight impact on the smoothness, color-mix
consistency, or both when dimming.
1: On the LED Settings menu, scroll to Output Freq.
Output:
Curve:
Output
Red Shift:
White Point:
Figure-4.12 Selecting Output Frequency on the LED Settings Menu
2: Press [
3: Press [
4: Press [
5: When asked if you are sure, select Yes and press [
Red Shift
Red shift allows the fixture to match its dimming performance to that of a conventional tungsten lamp.
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.
1: On the LED Settings menu, scroll to Red Shift.
Output:
Curve:
Output Freq:
Red
White Point:
Figure-4.13 Selecting Red Shift on the LED Settings Menu
2: With Red Shift selected, press [
3: Press [
Operation
LED Settings
Regulated
Standard
Freq:
] to select the value.
] or [ ] to set the desired value.
].
LED Settings
Regulated
Standard
Shift:
] or [ ] to commit the option.
1200
Off
3200K
].
1200
Off
3200K
] to toggle between On and Off.
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