8
5.2 EDID Jumper Operation
On the rear of the unit you’ll fi nd an EDID* Jumper. The default factory
setting for the EDID Control Jumper is
AUTO
and you should leave it as
it is if the display is operating properly.
The EDID jumper controls whether the DA determines the connected
devices’ EDID information automatically or uses an internal information
table. Switch to
INT
(Internal) to use the built-in EDID information table if
communication problems occur.
When the EDID control jumper is in AUTO position, the unit detects the
fi rst destination HDMI device’s EDID and records the value in the DA. If
the fi rst detected output device is DVI, it passes on to the next device in
sequence until the fi rst HDMI compliant device has been detected.
If the DA cannot reliably determine the destination device’s EDID through
the information exchange, switching to the internal table (INT) allows the
DA to run through a range of pre-defi ned resolutions and refresh rates so
that a reliable connection can be made.
* The Extended Display Identifi cation Data (EDID) is a data structure
provided by a display to describe its capabilities. It’s what enables the
DA to know what kind of video display is connected to the unit. EDID
is defi ned by a standard published by the Video Electronics Standards
Association (VESA). The EDID includes manufacturer name, product
type, phosphor or fi lter type, timings supported by the display, display
size, luminance data and (for digital displays only) pixel mapping data.
