UMX4x4-Pro
User’s Manual
Section
2
.
General
description
Page 13 / 129
Problem:
„I have a UMX4x4-Pro and I’m using a Lightware factory preset EDID. I would
like to be able to choose from different resolutions, but my source allows only
one resolution.”
Solution: Most Lightware factory preset EDIDs allow only one resolution, forcing the
sources to output only that particular signal. You need to select a Universal
EDID. It supports all common VESA resolutions. Additionally it also features
audio support.
2.5.
Advanced EDID Management
Each DVI sink (e.g. monitors, projectors, plasma displays, and 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 are supported.
HDMI 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. UMX4x4-Pro provides
Lightware’s Advanced EDID Management function that helps system integration. The built
in EDID Router stores and emulates 150 EDID data plus all monitor's EDID that are
connected to the output connectors. First 100 EDID are factory presets, while memories
100 to 150 are user programmable. The router stores the EDID of all attached monitors or
projectors for each output in a non-volatile memory. This way the EDID from a monitor is
available when the monitor is unplugged, or switched off.
Any EDID can be emulated on any input. An emulated EDID can be copied from the EDID
router's memory (static EDID emulation), or from the last attached monitors memory
(dynamic EDID emulation). For example, the router can be set up to emulate a device,
which is connected to one of the outputs. In this case the EDID automatically changes, if
the monitor is replaced with another display device (as long as it has a valid EDID).
EDID is independently programmable for all inputs without affecting each other. All inputs
have their own EDID circuit. EDID Router can be controlled via serial port or Ethernet.
Info
The user is not required to disconnect the DVI cable to change an EDID as opposed to
other manufacturer’s products. EDID can be changed even if a source is connected to the
input and it is powered ON.
Info
When EDID has been changed, the router toggles the HOTPLUG signal for 2 seconds.
Some sources do not observe this signal, so in this case the change is not recognized by
the source. In such cases the source device must be restarted or powered OFF and ON
again.
