Optoma EP1690 User Manual page 29

Setup
Signal
Phase: Synchronizes the signal timing of the display with the

graphics card. If you experience an unstable or flicker-
ing image, use this function to correct it.
Frequency : Changes the display data frequency to match the

H. Position: Adjusts the horizontal position.

V. Position: Adjusts the vertical position.

Mute
Choose the "On" to turn mute on.

Choose the "Off" to turn mute off.

Volume
Press to decrease the volume.

Press to increase the volume.

Projector ID
Allows RS232 control of an individual projector. Range 01~99.
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User Controls
frequency of your computer's graphic card. When
you experience a vertical flickering bar, use this
function to make an adjustment.
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