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Section 1. Introduction
Problem:
„I have changed to a different EDID on an input port of the matrix to
have a different resolution but nothing happens.”
Solution: Some graphics cards and video sources read out the EDID only after
power-
up and later they don‟t sense that EDID has been changed. You
need to restart your source to make it read out the EDID again.
1.6. 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. 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 si
gnal 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.
MX16x16DVI-Slim and MX12x12DVI-Slim provide
Lightware‟s Advanced EDID
Management function that helps system integration. The built in EDID Router
stores and emulates 100 EDID data plus all monitor's EDID that are connected to
the output connectors. First 50 EDID are factory presets, while memories 51 to 100
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
input has it‟s 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 source is
connected to the input and 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.
