Chapter 4Setup Adjustments
4-10 Hughes-JVC Technology Corporation
4.2.3. Blanking
Use Blanking to mask out unwanted anomalies on the pictures edges.
An unblanked image allows the entire image to be displayed on the
screen. If Blanking is adjusted incorrectly, the raster may blank out at
the right or left edges of the image. Adjust Blanking to the edge of the
active image.
To adjust Blanking:
1. Select TEST PATTERN #1, EXTERNAL IMAGE, from the TEST PATTERN
menu.
2. Select the BRIGHTNESS ADJUSTMENT from the PICTURE menu.
3. Use the arrow keys to increase the brightness level to view the entire
raster and video (refer to Figure 4.0-3 on page 4-12). Press ESCAPE
when finished.
4. Select T/L (top/left) BLANKING, from the TIMING menu.
5. Verify that the image and raster are smaller than the screen (refer to
Figure 4.0-3). If not, access the SIZE ADJUSTMENT from the
GEOMETRY menu and use the arrow keys to size the video image just
smaller than the screen size. Press ESCAPE or ENTER when finished.
6. Use the arrow keys to move the masking toward or away from the top
and left edges of the screen. When finished press ENTER or ESCAPE
7. Select B/R (bottom/right) BLANKING from the TIMING menu.
8. Use the arrow keys to move the masking toward or away from the
bottom and right edges of the screen.
9. Press ENTER or ESCAPE to exit the adjustment.
NOTE: Blanking, Phase, Size, and Centering are functions that
contribute to the entire image. If one (1) function is adjusted,
the others need to be rechecked and readjusted, if necessary.
4.2.4. Phase
The Phase adjustment positions the image within the raster.
To adjust Phase:
1. Use external image.
2. Select PHASE from the TIMING menu.
3. Use the arrow keys and adjust the horizontal and vertical phase so
that the image folds over on either side or at the top and bottom.
Center the image on the raster (see Figure 4.0-3 on page 4-12).
NOTE: Overadjusting vertical phase may cause vertical retrace lines
to appear in the image.
4. Press ESCAPE or ENTER to exit this adjustment.
5. Recheck the BLANKING ADJUSTMENT.