Clarity SN-4035-WX Bobcat, User Manual, Page: 58 / 120

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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
MONITOR
then press
ENTER
.
2. Select the pattern with the up-down arrows. The
up-down arrows will eventually get you to the
next column.
3. Press
ENTER
to display the highlighted test pat-
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
MONITOR
then press
ENTER
.
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.
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.