Gefen EXT-VGA-CAT5-142 - Manual (Page 9)

6
ADJUSTING THE 2X VGA EXTENDER RECEIVER
Brightness (AGC dip switch, Brightness trim pot)
The 2X VGA Extender receiver features an automatic gain control (AGC) for
brightness. This should set the optimal brightness based on the video signal.
However, manual adjustment can be done by disabling this feature. To disable
AGC, remove the silver metallic tape on the underside of the 2X VGA Extender
receiver to expose a 2 dip switch bank and a pair of trim pots. By default, AGC is
turned on as indicated by dip switch 1 being in the ON position (Dip switch 2 is
not used). Disable AGC by turning dip switch 1 to the OFF position. Adjustment
to the brightness can now be done using the Brightness (Br.) trim pot, located on
the back panel of the 2X VGA Extender receiver unit. Use steps 1 through 4 on
the previous page to adjust the brightness trim pot.
Color Skew Correction (Red, Green, and Blue trim pots)
Varying cable quality, length, and skew may offset the convergence of the three
primary colors. Red, green, and blue can individually be adjusted to compensate
for cable skew. Please use steps 1 through 4 on the previous page on the trim
pots for each color.
Focus (Focus and CABLE EQ trim pots)
If the image appears blurry or ghosted, the focus may need to be adjusted. Use
steps 1 through 4 on the previous page on the Focus (Foc.) trim pot, located on
the back panel of the 2X VGA Extender receiver unit.
The focus can be fi ne tuned using the CABLE EQ trim pot located on the
underside of the 2X VGA Extender. Use steps 1 through 4 on the previous page
to adjust the CABLE EQ trim pot.
Offset
Not for user adjustment. For service purposes only.
AGC
Cable EQ
Offset