Barco HDF W22 User And Installation Manual page 290

12. Alignment
Image 12-160
Main window
2. Press ENTER.
3. Use the ▲ or ▼ key to select Dark Time Adjustment
Image 12-162
Dark time adjustment
4. Use the ◄ or ► key to change the dark time until the correct value is reached.
The actual used dark time is indicated next to Actual Dark Time.
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Image 12-161
Alignment, 3D glasses
R5905158 HDF SERIES 08/12/2016