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Introduction, cont’d
Digital Display Scaler • Introduction1-4
Operational flexibility — Operations such as input and scaling selection, picture
controls, and saving and recalling of presets can be performed on the front
panel or over the RS-232 link. The RS-232 link allows remote control via a PC
or control system. Input selection is also available under contact closure
control.
• Front panel control — The scaler front panel controller supports individual
input selection. The front panel features large, positive touch, illuminated
buttons that can be labeled with text or graphics, two rotary knobs for
making adjustments or selecting menu options, and an LCD.
• Windows-based control program — Extron’s Windows-based control
program provides a versatile range of operational options with its graphical
interface and drag-and-drop/point-and-click operation.
• Simple Instruction Set (SIS™) control — The remote control protocol uses
Extron’s SIS for easy programming and operation.
• Contact closure control — The operator can select either input via contact
closure through the Remote port.
Accu-RATE Frame Lock™ (AFL™) — A technology exclusive to Extron that solves
frame rate conversion issues experienced by video scalers. When video input
and output refresh rates differ, occasionally the two rates cross over each
other. The result is a glitch or image freeze on the display. AFL solves this
problem by locking the output frame rate to the input frame rate.
3:2 pulldown detection for NTSC video sources — This advanced, patent pending,
film mode processing feature helps maximize image detail and sharpness for
video sources that originated from film. When film is converted to NTSC
video, the film frame rate has to be matched to the video frame rate in a
process called 3:2 pulldown. Jaggies and other image artifacts can result if
conventional deinterlacing techniques are used on film-source video. The
DDS 402’s advanced film mode processing recognizes signals that originated
from film. The DDS 402 then applies video processing algorithms that
optimize the conversion of video that was made with the 3:2 pulldown
process. This results in richly detailed images with sharply defined lines.
Test patterns — The switcher features built-in test patterns to aid in monitor or
projector set-up and evaluation.
Blue mode — The switcher can be set to output the blue video signal only, to help
installers calibrate the monitor or projector.
Triple-Action Switching™ (RGB delay) — RGB delay blanks the screen when the
scaler switches between inputs. The new sync signals precede the RGB
signals, so that a noise-filled scramble is not shown during the transition.
The time delay between the RGB and sync signals is user adjustable up to
five seconds on the front panel and under RS-232 control.
Horizontal and vertical detail — The DDS 402 offers four levels of horizontal detail
and eight levels of vertical detail. Horizontal and vertical detail minimize the
loss of picture fidelity.
Picture controls — Horizontal and vertical centering, horizontal and vertical sizing,
brightness, contrast, zoom, and detail controls are available for fine picture
adjustments.
Top and bottom line blanking — Extron’s exclusive variable horizontal blanking
feature allows the operator to add black lines at the top and bottom edges of
the image to mask the top and bottom each image.