ETC Source 4WRD II - Focus the Fixture; Set the Z-adjustment

Source 4WRD II Installation and User Manual 15
Focus the Fixture
Set the Z-adjustment
Use the Z-adjustment knob located on the rear of the fixture to adjust the
field of the LED light for specific applications.
1. Turn on the fixture and aim it at a flat surface.
2. Slide the fixture barrel toward or away from the Source 4WRDII LED
to create a hard-edged beam of light.
3. Turn the knob toward PEAK or FLAT until you achieve the desired
field.
Ideal beam of
uniform light
Adjust toward PEAK to
blend overlapped beams
Adjust toward FLAT to
improve sharp focus
Z-adjustment knob
Note: The Source 4WRD PAR or PARNel Fixture Body optics are
optimized for PEAKfocus. When using the Source 4WRDII LED in a
Source 4WRD PAR or PARNel Fixture Body, turn the Z-adjustment
knob toward PEAK until the knob becomes loose, and then tighten
the Z-adjustment knob an additional quarter turn. This sets the
LED light source into the appropriate position within the fixture.