Gefen 4x2 HDMI - Manual (Page 10)

7
EDID MANAGEMENT FEATURE
EDID. What is it and what is it used for?
Under normal circumstances, an source device (digital and analog) will require
information about a connected device/display to assess what resolutions
and features are available. The source can then cater its output to send
only resolutions and features that are compatible with the attached device/
display. This information is called EDID (Extended Display Information Data)
and a source device can only accept and read one EDID from a connected
device/display. Likewise, the source an only output one resolution for use by a
connected device/display.
Why is EDID so important with the 4x2 Switcher for HDMI?
The 4x2 Switcher for HDMI is complex piece of technology that replicates and
switches between multiple inputs and outputs. Each connected source device
will require one EDID to read. EDID management is carefully handled by 4x2
Switcher for HDMI to provide a single EDID for each source to read.
What options do I have to manage the EDID in the 4x2 Switcher for HDMI?
First, it is important to note that each source device can only output one video/
audio signal type. This includes resolutions and timings. When multiple devices/
displays are used, such as with the 4x2 Switcher for HDMI, it is important to
use devices/displays that have similar or compatible resolutions/features. This
will ensure that the single video/audio signal produced by the source device is
accepted by all of the connected output devices/displays.
The user has the option, through a combination of DIP switch settings within
the 4x2 Switcher for HDMI, to choose how the unit will manage the EDID from
multiple HDMI devices/displays. Therefore the user has some control over the
resolutions/features that the source devices will output. The 4x2 Switcher for
HDMI has a multiple EDID management modes that will control how the EDID
information from multiple devices/displays are combined, ignored, and routed.
How do I change EDID modes in the 4x2 Switcher for HDMI?
There is an bank of 8 DIP switches located on the main-baord inside of the 4x2
Switcher for HDMI. DIP switches 1, 2, 5, and 7 are used in different combinations
to manage the EDID modes.
TIP: EDID modes and IR code channels can also be managed via the RS-232
serial communications port. For this to work, all DIP switches must be in the OFF
position. This is the factory default setting. If you wish to use this feature, please
do not open the unit. See page 9 and 10 for more information on the RS-232
serial communication features.
To access these DIP switches it will be required to open the unit. To do this,
remove all screws on the underside and side of the unit. Remove all HEX screws
on the rear panel. This includes the screws above each HDMI port and on each
side of the RS-232 serial communications port. Carefully slide the unit apart.