Lightware MODEX-OPTM-RX, User Manual, Page: 50 / 113

Page 50 / 113 Section 6. Web control
– Using the built-in website
6.6. EDID menu
6.6.1. About EDID memory (transmitter)
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EDID memory is non-volatile and consists of four blocks, each for different purposes:

Factory preset EDIDs

User-saved EDIDs

Dynamic EDID (EDID of last connected sink on the output port)

Emulated EDIDs (EDID currently emulated on a specific input port)
EDIDs are numbered from 1 in each block. They can be referred as the first letter of the
block name and the number of the desired EDID. This way F02 refers to the second factory
preset EDID.
Dynamic and emulated EDID blocks’ size depends on the A/V modules. EDID memory
structure is the following:

F01..F119 .................................................................. Factory Preset EDIDs

U01..U31 ..................................................... User programmable memories

Dxx ..................................................
Last attached monitor’s EDID (output)

Exx ........................................................................... Emulated EDID (input)
Dynamic, factory and user EDIDs can be switched and emulated at the input(s).
Info: Factory EDIDs (Fxx) are factory preprogrammed and cannot be modified. These are the
most commonly used resolutions. The EDID list can be found in section 11.3 on page 112 .
Info: MODEX can handle both 128 Byte EDID and 256 Byte extended EDID structures.
Info:
Attached monitor’s EDID is stored automatically, until a new monitor is attached to that
p
articular output. In case of powering the unit off, last attached monitor’s EDID remains in
non-volatile memory even if the monitor is disconnected.
6.6.2. EDID types
Most of the factory preset EDIDs include only one resolution. This is to force the connected
source to give a signal with the needed resolution. However there are Universal EDIDs as
well which allow many resolutions.
Factory EDIDs are divided into groups regarding their type. Some EDIDs support DVI only,
some support HDMI and some are for analog VGA signals. Also there are EDIDs for Dual
Link DVI resolutions.
DVI EDIDs does not support audio. Universal DVI EDID indicates support for many PC
(VESA) resolutions.
HDMI EDIDs support embedded audio. These EDIDs have PCM stereo audio format
enabled. To allow other audio formats like Dolby and DTS, special EDIDs have to be used.
There are three Universal HDMI EDIDs which include the same resolutions but support
different capabilities:
EDID PCM audio other audio deep color
Universal_HDMI_PCM yes no no
Universal_HDMI_ALL yes yes no
Universal_HDMI_DC yes yes yes
Table 6-10. Universal HDMI EDIDs
Info: Analog EDIDs are for future developments.
Dual Link DVI EDIDs does not support audio. Use only for Dual Link ports.
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The exact EDID memory size depends on the firmware and the installed A/V modules.