Gefen EXT-DVI-2500HD, Руководство пользователя, Страница: 12 / 20

8
DDC Modes
DVI•2500HD can operate in 2 DDC modes. It is important to determine the DDC
mode before attempting to connect anything to the DVI•2500HD units. The DDC
will carry EDID information which is critical in determining a connected device’s
resolution capabilities and operational limits. This section will outline the 2 modes
and list the features of each.
Direct DDC Mode
The Direct DDC mode will transmit DDC2B, which will carry the EDID, over a
connected CAT-5e cable between the sending and receiving units. This mode
supports HDCP with a maximum extension distance of 330 feet (100 meters) .
Virtual DDC Mode
The Virtual DDC mode will record and store the EDID of a connected DVI-
capable output device (i.e DVI display). This will permit the DVI extension to
reach a maximum distance of 6,600 feet (2 kilometers) as the distance will no
longer be limited to the CAT-5e cable used in Direct DDC mode. This mode does
not support HDCP.
Single-Link and Dual-Link Setups
DVI•2500HD will accept both Single-Link an Dual-Link DVI sources and displays.
When operating Single-Link devices, only a single pair of fiber optic cables will be
needed for operation. These cables will utilize Channel 1 for DVI extension.
When using Dual-Link devices, two pairs of fiber optic cables will be needed
for operation. These cables will utilize both Channel 1 and Channel 2 for DVI
extension.
CONNECTING AND OPERATING THE DVI•2500HD