Christie DS+4K, User Manual

Page: 49 / 144

Section 3: Operation
User’s Manual 3-27
.
Video Options
— SUBMENU
This submenu is used with video
sources only (
INPUTS 3
or
4
).
ENABLE DECODER AGC:
Automatic
Gain Control (AGC) affects decoded
video images only. Enter a checkmark
(default) in most instances—this
activates the decoder’s AGC circuit to
ensure properly bright images. Delete
the checkmark if a decoded video image exhibits strange color artifacts such as stripes
in highly saturated colors, indicating an incompatibility between this source and the
AGC.
VIDEO STANDARD:
For all but the more unusual video standards
available in the world, the projector automatically detects the
incoming horizontal and vertical frequencies and sets the projector’s
processing of this signal to the corresponding standard. The current
video standard name appears in the Video Options submenu, and
includes an “A” if it has been auto-detected. Press
to view or
select a different video standard from those available to the
projector—any that are disabled have frequency characteristics that
differ from those of the incoming signal. Selecting a specific
standard forces the projector to process the signal according to this standard.
Table 3.3. Regions and Video Standards: Summary
Standard Where Used (SUBJECT-TO-CHANGE )
NTSC N. America and Japan
NTSC 4.43 A tape-only standard for partially-translated hybrid signals
PAL Most of Europe, China, Australia, some of S. America, some of Africa
PAL-M Brazil
PAL-NC Argentina, Chile, other Latin American countries
PAL 60
SECAM France, Eastern Europe, most of Africa
NOTE: Generally, use “Auto” for all instances EXCEPT: 1) a poor quality input
signal or 2) a black-and-white video signal. In order to detect and display such
signals, select the relevant standard from the list.
INPUT VIDEO BLACK —
This control
compensates for incoming elevated black
levels present in certain video signals, and
ensures that blacks in the display are
neither crushed (i.e., where dark grays appear black) nor excessively elevated (i.e.,
where blacks appear dark gray). By default, the projector automatically determines the
best setting according to the type of incoming video signal:
•
0 IRE
– Used for DVD output with “enhanced black”, SECAM, most
PAL standards, and Japanese NTSC.
•
7.5 IRE
– Used for most NTSC video signals.
For some types of video, you can override the setting. The control is disabled for other
types of video (and all graphics sources). Generally, if black appears crushed when
brightness = 50, choose “0 IRE”. If black appears excessively elevated, use “7.5 IRE”.