Section 3: Operation
Diagnostics & Service
Select this submenu to access various internal test patterns and/or freeze the displayed image for diagnostic and setup purposes.
TEST PATTERN
Nine internal test patterns are available from this menu. You can highlight and press Enter to select a desired test pattern or you can cycle through the
available patterns using the direct key 
on the keypad. For each key press made, another test pattern appears. The name of the test pattern is displayed in the top left corner.
When Off is selected, no test pattern displays.
NOTES: 1) If you previously used 
to select a test pattern and again wanted to use the direct key to access another pattern. It will begin cycling through the patterns from where you previously left off. 2) Some menu items are not available when an internal test pattern is displayed, such as Auto Setup. Unavailable menu items are in yellow text.
Figure 3.29.
FREEZE ALLOWED
You can enable or disable the function of the Freeze key with this option. Select Allow to enable the use of the Freeze key. When Disallow is selected
key will not function when pressed.
Figure 3.30.
FREEZE IMAGE
You can freeze/unfreeze the displayed image by manually selecting Enable or Disable from the Freeze Image option. Select Enable to freeze the image and Disable to unfreeze it.
Figure 3.31.