Planar LC1200R - Manual (Page 12)

LC1200R User’s Guide 021-0183-00 Rev A 12 of 29
defined as a level between 0-mv and 10-mv. The white state (full white) is dependent on the
VGA controller driving the LC1200R. 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 LC1200R is 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 6.1) of red,
green, and blue analog input signals based on the maximum output level range previously
specified.
Figure Figure Figure Figure 3 3 3 3
RISE
TIME
FALL
TIME
NEG
POS
HIGH
STEADY
LEVEL
LOW
STEADY
LEVEL
OVERSHOOT
4.2.2 Synchronization
Sync pulses for horizontal and vertical are TTL levels. Figure 4 TTL Allowable Signal Levels
defines the levels and drive current capabilities.