Electronic Theatre Controls Source Four Revolution User Manual download pdf (Page 9)

Adjustments

Centering lamp and adjusting the field

The two concentric knobs located on the lamp housing allow you to align the lamp and adjust its

field. See Figure 4. The outer knob centers the lamp within the reflector. The inner knob adjusts the

lamp’s field.

Step 1: Turn on the Source Four and aim it at a flat surface. Adjust the barrel to create a hard

edge.

Step 2: Unlock and loosen the outer knob by turning it counterclockwise.

Step 3: Gently move the outer knob from side to side and up and down until the lamp is centered

within the reflector.

Step 4: Once the lamp is centered, turn the outer knob clockwise to lock it in place.

Step 5: Finally, turn the inner knob either clockwise or counterclockwise to achieve an optimum

flat field. See Figure 5.

Focusing the beam

Step 1: Loosen the beam focus knob located under the barrel as shown in Figure 6.

Step 2: Slide the lens tube forward or backward to achieve the desired beam edge.

Step 3: Once the fixture is focused, tighten the beam focus knob.

Outer Knob - lamp

center adjustment

Inner Knob -

peak/flat field

adjustment

Rear lamp

housing

Figure 4

Figure 5

Flat field-best adjustment

Hot spot - lamp pulled out

too far

Field with hole - lamp

pushed in too far

Beam focus knob

Figure 6

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Electronic Theatre Controls Source Four Revolution User Manual Page 9