Planar m46L User Manual

Adjusting Input Levels

m40L/m46L Installation & Configuration Guide

27

For all sources, adjusting to the source’s picture means learning what that source 
means by black and white.

For analog sources, black is supposed to be a voltage of zero coming from the 
computer’s video card, but it almost never is. White is supposed to be a voltage of 0.7 
volts, but it usually isn’t either. 

For digital sources, black is supposed to be a code of 0, but in some cases it is a code 
of 16. White is supposed to be a code of 255, but in some cases it is a code of 235.

The Input Level adjustment process asks you to provide a picture from the source 
that is black, then one that is pure white. With these, you can quickly and 
automatically make the display “learn” what this source means by black and white. 

The result? Good pictures, using all the dynamic range of color coming from the 
source. 

For Input Levels, you must use the computer or source you will use for the program. 

For example, don’t make this adjustment with your work laptop and then switch to another 
computer for the display’s program of pictures.

This section applies to Analog RGB (computer) pictures only. The levels are best 
adjusted semi-automatically. 

For Analog RGB pictures, the levels for black and white vary from one computer to 
another, or from one video processor to another. They even vary between video 
outputs from a multiple-output video card in a computer.

Your pictures will not look their best on the display until you adjust for these 
differences. This is not about adjusting color or contrast. It’s about telling the display 
what the computer or processor means by black and by white.

Select a source in the 

PICTURE

 menu.