EDID Link Hardware

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EDID Link Hardware

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Navigation:  Hardware and Accessories > Discontinued Accessories > EDID Link >

EDID Link Hardware

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This chapter explains the features of the EDID Link's hardware. The previous chapter offers general information about the EDID Link whilst the next covers its software features.

Presets

With its two selection knobs, you can select from up to 99 different EDIDs directly. Presets 01-49 are holding read-only default EDIDs while presets 50-99 can be configured by the user. All EDIDs can be exported to a file to be used on a different system, such as the Pandoras Box Quad Server with its DVI Processor.

Preset 00 acts like a “transparent mode” which will route through the EDID coming from the connected display device. More than that, the last seen, valid EDID is stored to preset 00. Therefore you can disconnect the display while the graphics card will still see the display’s information. Whenever a different EDID is transferred into the device, this information will be written into preset 00, even while emulating another preset at that time.

In order to read out a new EDID, the EDID Link needs to receive 5V either coming from the graphics card, or the USB-plug. With any 5V input connected, you may read out and store the display’s information to preset 00 and later on edit it or download it to your computer using the software "EDID Link Editor".

Usage

Your EDID Link is directly ready to use. You do not need any installation in order to use the default EDIDs. A list is printed onto the device and is part of the delivered documentation.

- Power down your signal source (e.g. a computer) first.
- Connect the EDID Link’s DVI “in” connector with the included short DVI cable to the graphics card’s output of your signal source.
- Connect the EDID Link’s DVI “out” connector to your display device (e.g. a monitor).
- Select the desired EDID by rotating the selection knobs.
- Power up your signal source.

The signal source will now receive the EDID adjusted on the EDID Link. You may need to select and confirm to change to this resolution using the graphics card driver. From now on, there is no direct connection from the graphic source to the display any longer. Therefore, you may power down the display without loosing your graphics card settings as the EDID Link is still emulating the device. Even a loose connection of the DVI cable will not harm the settings any more. When using presets other than 00, you will be able to switch display devices without transferring this information to the source.

It is recommended to power down the complete system before disconnecting a DVI cable.

Rotating the selection knobs while running the system will lead to a disconnect of the attached EDID Link and the graphics card. It may switch to a not connected state. As long as you turn the knobs, the EDID Link remains in the disconnected state. After two seconds of not changing the preset, the device will output the selected EDID. You may need to set the resolution again within your graphics cards settings or source device settings.

LED Codes

The LED next to the USB plug features different LED codes:

Red

blinking

the device is in firmware programming mode

Blue

pulsing to magenta every 5s

the device is idle and ready to use

Blue

switching once off for 0,5s

the device is used by the software to read from or write to a preset

Important information about internal EDID handling

EDIDs (Extended Display Identification Data) are used to describe the (preferred) timing of a display device. The timing is describing the display’s resolution and its sync pixels. It is communicated to the graphic source via the DVI-cable.

A single EDID may feature a list of different timings which can be processed by the monitor. This may be a combination of “Established Timings”, “Standard Timings” and “Detailed Timings” at the same time. This gives the user the flexibility to choose from more than one resolution, whenever the native one is not about to be used.

As this flexibility often leads to not having the desired resolution set within the signal source, the EDID Link limits all its EDIDs to only one single timing.

Using this fact, the graphics card will be forced to output the exact desired resolution and timing.

Note: All default EDIDs as well as imported or read out ones from any device are changed and limited to the “First Detailed Timing Descriptor”. Extensions are being cut off as well as soon as they are stored into the EDID Link.

As preset 00 acts as a transparent mode, you will find the original EDID including all timings and extensions. Storing this data into a preset will reduce the timing to a single one. How to do this is explained in the next chapter covering the EDID Link's software.