Black Level (G2) And Sensitivity Offset; Black Level (G2) - Hughes JVC CB100 User Manual

Chapter 4—Setup Adjustments
15. When the upper left corner is converged satisfactorily, press E
to the M
Figure 4.0-12 on page 4-26 and center the cursor over each of the positions
in the sequence shown, wherever convergence is required, repeating the
M
16. When finished using full screen cursor, press E
KEY
17. Use the arrow keys to size down to a cursor of approximately ¼ screen size.
18. Select the areas to be converged and converge the entire screen in the
sequence shown in Figure 4.0-13 on page 4-26. Start at the upper left
corner and continue in the same manner as performed with the full screen
cursor in Step 15.
19. Save changes when finished with XY Registration.

4.7. Black Level (G2) and Sensitivity Offset

G2 sets the threshold of the CRT image and is adjusted, along with the Sensitivity
Offset adjustment, using the Grey/Pluge test pattern. Together, these
adjustments determine the level of the darkest and brightest areas of the video
image.
The G2 adjustment is preset at the factory and may need little or no adjustment.
These adjustments are made in sequence, one (1) color at a time. It is preferable
to start with Blue because it is the weakest color of the three (3) to observe.
When the Blue settings are complete, the same adjustments are performed for
Green and Red.

4.7.1. Black Level (G2)

highlighted. Otherwise all colors are reset and good data from a previous
setup will be deleted.
4-30
/S
OVE IZE MODE
/S /A
OVE IZE DJUSTMENT
to the S .
IZE MODE
To set the Black Level for Blue:
1. Use the RGB and H
S H
HUTTERS ON IDE
checked.
2. Toggle the RGB
CAUTION!!!
3. Access C
ONVERGENCE MENU
4. Access the Grey/Pluge test pattern.
5. Access B L
LACK EVEL
6. Use the up/down arrow keys to adjust the black level so the small,
black square in the center of the larger black square is just barely
visible (as illustrated in Figure 4.0-17). Press E
.Toggle the M
ODE KEY
steps for each area that needs convergence.
to hide R and G. Verify that the
IDE KEYS
box under the S
YSTEMS
to select B only.
KEY
Ensure that only the color to be adjusted is
and select R
(G2), from the C
Hughes-JVC Technology Corporation
NTER
to the M . Refer to
OVE MODE
and toggle the M
NTER
-P
REFERENCES MENU
.
ESET
.
ONVERGENCE MENU
when finished.
NTER
to return
ODE
is