Техническое Руководство для Planar LC12

 

Title:  Engineering Specification: 12.1-inch AMLCD Monitor 

Page 11 of  27 

Document Number: 023-0284-00 

 

          Revision:  A 

As seen by the source, input resistance is 75-ohm, ±10%; input capacitance at (150 MHZ) 
<10-pF. 

Coaxial cable is provided for video signal line(s) to match impedances and for EMI 
attenuation. The video input signal will have a range of 0-mv to 714-mv (maximum) where 
0-mv is minimum luminance.  Rise and fall times for the input signal (10% - 90%) will be 

#

5-ns (Figure 6). 

When terminated with a 75-ohm termination, the dark state (black level) is defined as a 
level between 0-mv and 10-mv.  The white state (full white) is dependent on the VGA 
controller driving the Monitor.  Maximum levels may range from 550-mv to 714-mv.  
Nominal 680-mv input voltage shall be defined as the default for supplier setup 
requirements. 

Displayed image intensity and colors will change linearly with the video analog input.  
This is necessary to provide a uniform user color change on the screen in response to a 
uniformly stepped analog input.  The Monitor must be capable of resolving a minimum 
color range of 262,144 displayable colors (6 bit resolution for Red, Green and Blue).  This 
interpolates to 64 shades of gray (or color) at the Red, Green, and Blue analog video 
inputs.  Accomplishing specified shades of gray requires a “Video Gain” control 
adjustment (Section 15.0 ) of Red, Green, and Blue analog input signals based on the 
maximum output level range previously specified. 

  

 

 

Figure 5. Rise / Fall Time