Diagnostics, Test Patterns - Clarity SN-4610-1080 User Manual

3.4 Diagnostics, Test Patterns

These are used for testing and troubleshooting
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.
To turn on a Test Pattern
1. Press then press
MONITOR
2. Select the pattern with the up-down arrows. The
up-down arrows will eventually get you to the
next column.
3. Press to display the highlighted test pat-
ENTER
tern.
When a Test Pattern is shown, the program picture is
blocked. To see the source picture, set Test Pattern to
None.
To turn off a Test Pattern
1. Press then press
MONITOR
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
alternating black and white.
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
border.
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 television and video field. These
bars are 100% saturated.
Uniformity shows some marks on the screen where
factory measurements are made for color and bright-
ness uniformity testing.
48
ENTER
.
ENTER
.
Colors shows a rainbow of colors and a gray scale at
several levels of saturation for testing uniformity.
Fans & Diagnostic Values
This menu shows the state of the fans, whether
OK or Failed. A failed fan does not turn off the back-
lights.
The next two menu items are about RS232 con-
trol, showing the last packet type received and the
number of packets received thus far. Packets Received
is not reset to zero except by counting past 32,767
and rolling over to 0.