Dell S300w Projector - Manual (Page 41)

Using Your Projector 41
F REQUENCY —Allows you to change the display data clock frequency to match the
frequency of your computer graphics card. If you see a vertical flickering wave, use
Frequency control to minimize the bars. This is a coarse adjustment.
T
RACKING —Synchronize the phase of the display signal with the graphic card. If you
experience an unstable or flickering image, use Tracking to correct it. This is a fine
adjustment.