Ddc Switches - Extron electronics DVI 201xi TX User Manual

DDC Switches

When the DVI-D source device boots up, it uses the Display
Data Channel (DDC), a two-way communication protocol, to
obtain Extended Display Identification Data (EDID) from the
display device. This allows the source to output a resolution
that matches the capabilities of the display.
A bank of three switches allows the user to determine how the
source device will obtain the EDID. The EDID can be obtained
directly from the display device, or from the internal memory
within. The three switches are:
EDID Minder — This switch must be On for the EDID Minder
function to be enabled (see page 3-2). The factory default for
this switch is the Off position.
Default EDID — When the Default EDID switch
is On (factory default), an EDID showing a native
resolution of 1024x768 @ 60 Hz is passed to the
source device. The EDID Minder switch must also
ON
ON
be On for the Default EDID switch to function (see
the figure at right and page 3-2).
1 2 3
OFF
Remote DDC — When this switch is Off, DDC will
be routed to the local monitor. When the switch is On, the DDC
is routed to the remote display device.
DVI 201xi Tx • Installation 2-13