Extron Electronics DVI DL 201 Tx_Rx User Guide - Manual (Page 16)

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. The factory default for this switch is the off position.
Default EDID — When the Default EDID switch is on (factory default; see
figure at right), an EDID showing a typical dual link DVI display resolution of
2560x1600 @ 60 Hz is passed to the source device. The EDID Minder switch
must also be on for the Default EDID switch to function.
Remote DDC — When this switch is off, the DDC is routed to the local
monitor. When the switch is on, the DDC is routed to the remote display device.
See page 13 for more information about configuring these switches to provide the source
device with the correct EDID.
Control Pass-through
The DVI DL 201 Tx/Rx cannot be controlled by RS-232 or IR controls.
However, they are able to pass signals from a control device to a
remote device that is controlled by those signals.
NOTE: The RS-232 and IR communications are via a passive
pass-through only; the transmitter and receiver neither
generate nor respond to these signals.
Use the three-pole, 3.5 mm captive screw connector on the
transmitter to input RS-232 or IR signals from a control device. Use
the corresponding connector on the receiver to pass signals to the
output display.
NOTE: The ideal length of exposed wire in the stripping process is 3/16 inch (5 mm).
If longer than 3/16 inch, the exposed wires may touch, causing a short circuit.
If shorter than 3/16 inch, the wires can be easily pulled out even if tightly
fastened.
Do not tin the wires. Tinned wire does not hold its shape and comes loose
over time.
3-Pole
Captive Screw
Connector
3/16" (5 mm)
MAX
Tx Rx
Tx Rx
ON
1 2 3
ON
OFF
DEF
AUL
T EDID
EDID MINDER REMOTE DDC
DVI DL 201 Tx/Rx • Panels and Cabling 10