Clarity Bay Cat X SN-4620-1080 Manuel D’Utilisation

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5.2 Diagnostics, Test Patterns

Possibly the most important test pattern is None. This is the 
one that allows the source picture to show on the screen. 
All other patterns block the program picture.

All test patterns are full screen. Aspect Ratio has no 

effect. 

1. Press 

MONITOR

 then press 

ENTER

.

2. Select the pattern with the arrow keys. Move between 

columns using left-right arrow keys; up-down arrows 
will eventually get you to the next column. 

3. Press 

ENTER

 to display the highlighted test pattern.

✎

When a Test Pattern is shown, the program 
picture is blocked. To see the source picture, set 
Test Pattern to None. 

1. Press 

2. Select None with the up-down arrows. 

3. Press 

ENTER

. 

White, Red, Green, Blue, Black, and Gray all show 
full screens of the color. Gray is 50%. 

4 x 4 Checkerboard is a pattern of 16 rectangles alter-
nating black and white. This pattern is used in the factory.

The Gray, Red, Green, and Blue Scales show 32- or 
64-step scales. You should be able to see all the steps 
clearly.

Grid shows a white background with a 4 x 4 grid of 
magenta lines surrounded by a 3-pixel-wide magenta bor-

der. This is useful for aligning an image, especially in rear 
projection applications.

Color Bars displays a pattern of the three primary colors 
and the primary combinations along with black and white. 
This is similar to, but not the same as, color bars in the tele-
vision and video field. These bars are 100% saturated. 

Uniformity shows some marks on the screen where fac-
tory measurements are made for color and brightness uni-
formity testing. 

Colors shows a rainbow of colors and a gray scale at sev-
eral levels of saturation for testing uniformity.

The Unit Status menu displays information about the 

unit. 

The first two lines display the product name and screen 

resolution of the unit, along with the firmware revision 
level. Other information is described below.

Asset Tag is an optional user settable field which is set 

via the RS-232 port. This could be a serial number, name or 
any other piece of information desired

Backlight Status shows OK if the electronics module 

detects that both banks of backlights are functioning nor-
mally. Shows Failed if one or both of the backlight banks is 
not drawing the correct amount of current

Internal Temperature is the current internal tempera-

ture at one point on the backplane of the LCD panel. For 
more information, see “Internal Temperature” on page 85.

Mode ID is the index into the internal mode table found 

for the incoming signal. This is used in diagnosis of mode 
detection problems

HPer is the measured horizontal period of the incoming 

signal. This is used in diagnosis of mode detection prob-
lems

VLines is the number of horizontal lines detected per 

vertical period. This is used in diagnosis of mode detection 
problems

Using the Custom Test Pattern Color menu (Test Pat-

terns > Custom Color), you can create custom solid color 
test patterns.