Advanced Edid Management; Pixel Accurate Reclocking - Lightware MX-FR9 User Manual

Problem: „I have changed to a different EDID on an input port of the matrix to have a
Solution:

4.2. 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 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.
All of our modular matrices 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 its 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.

4.3. Pixel Accurate Reclocking

Signal reclocking is an essential important procedure in digital signal transmission. After
passing the reclocking circuit, the signal becomes stable and jitter-free, and can be
transmitted over more equipment like processors, or event controllers. Without reclocking,
sparkles, noise and jaggies can be seen on the image.
Lightware's sophisticated Pixel Accurate Reclocking technology fixes more problems than
general TMDS reclocking. It removes not only intra-pair skew but inter-pair skew as well.
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different resolution but nothing happens."
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.
Section 4. Technologies