Ask Proxima Impression 880 User Manual page 21

USER GUIDE SVGA LCD MULTIMEDIA PROJECTOR
OPERATION
FREQ
Select FREQUENCY in the MENU.
With data from a computer source displayed on-
screen, set the background to a chequered pattern
50% grey (direct mode 1:1 uncompressed).
If the frequency is set wrongly, vertical unstable
bands will be visible in the image (see illustration).
Adjust with the frequency with the trackball to remove
all the vertical bands (see illustration).
When adjusted correctly, there might be a horizontal
" swimming" effect in the image. This is adjusted by
timing the image.
TUNE
Select TUNING in the MENU.
Adjust the tuning using the right/left keys to stabilize
the image. Preferably all the " sideways swimming"
lines should be removed (see illustration).
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