Edid Management: Using Edid Router - Lightwave MX 8x8 DVI Pro User Manual

4.3

EDID Management: using EDID Router

Each DVI sink ( eg. monitors, projectors, plasma displays, switcher inputs) must
support the EDID data structure. Source BIOS and operating systems are likely to
query the sink using DDC2B protocol to determine what pixel formats and interface
is supported. DVI standard makes use of EDID data structure for the identification
of the monitor type and capabilities. Most DVI sources (VGA cards, set top boxes,
etc) will output DVI signal after accepting the connected sink's EDID information. In
case of EDID readout failure or missing EDID the source will not output DVI video
signal.
Why is EDID management necessary?
All DVI sources must read attached sink's EDID data (switcher input, monitor input,
etc.) before starting the DVI signal transmission. If no EDID is available, most
sources will not output the signal. Unlike in standard analog VGA graphics cards,
DVI
desktop/properties/settings tab to different pixel resolutions. Only those resolutions
and refresh rates are allowed, which are defined in EDID data.
To provide proper EDID data for DVI sources MX 8x8 DVI PRO has an advanced
built in EDID router, that can manage the emulated EDID on it's all inputs
indpendently. EDID can be managed using Lightware Matrix Controller software
from a PC computer or Laptop through RS232 connection or Ethernet port.
Emulating the right EDID information helps the user and installation engineer to
control overall system's signal properties
EDID emulating options are:
With EDID Router function the user is able to store EDID from any attached
monitor to one of the user programmable memories, to download EDID from file to
user memory, and to upload EDID from the router to file.
Info User must not disconnect DVI cables to change an EDID opposite to other
manufacturer's products. EDID can be changed even if source is connected to the
input and powered ON .
Info When EDID has been changed, the router toggles the HOTPLUG signal for 200
msec. Some graphic cards or DVD players do not sense the hotplug signal, and
there can be happen, that even if EDID has been changed, the new set resolution
is not affected. This case the source device must be restarted, or powered OFF
and ON again.
graphics cards do
1 emulating an EDID from factory preset memory ( 50 EDID) – static
EDID emulation
2 emulating an EDID from user preset memory ( 50 memory
locations) – static EDID emulation
3 copying and emulating EDID from one of attached display devices
- dynamic EDID emulation
not allow to be
MX 8x8 DVI Pro
User's Manual
forced from Windows
Page 33 / 53