DVIGear DVI-7320 - Manual (Page 7)

-5-
Info: If present, the 8th fiber optic cable does not need to be connected as all
signals are transmitted over cables 1-7. The 8th fiber optic port (to the left
of port T7 or R7) is unmarked and is a dummy port.
System Connection
PC
Monitor
Transmitter Unit Receiver Unit
Dual-Link
DVI Cable
7- strand Fiber Optic Cable
UTP CABLE
DC Power Adapter DC Power Adapter
(Optional)
Dual-Link
DVI Cable
DDC Communications
When the DVI-7320-Tx unit is set for Real DDC operation, a CAT5 copper cable
of suitable length must connected between the DDC ports of the DVI-7320-Tx and
DVI-7320-Rx units. In the Real DDC Mode, the EDID of the connected display is
presented to the DVI source device via DDC link to the DVI-7320-Tx unit. Since
DDC communications are based on I2C technology, the maximum cable length
for the DDC link (CAT5 cable) is 100 meters (328 ft.) as this is the limit of I2C
extenders.
In the DDC Emulation Mode, the connected display’s EDID can be stored in an
EDID memory device located in the DVI-7320-Tx unit. When the DVI source
boots, up it reads the EDID information stored in the DVI-7320-Tx in the same way
as if the display were connected directly to it. The DDC Emulation Mode eliminates
the need for the copper DDC link; hence it allows much longer cable runs (up to
500 meters) to be used.
Programming the EDID Memory
1.) To program the EDID memory, remove all connections to the DVI-7320-Tx unit.
2.) Set the DDC switch on the DVI-7320-Tx to the Emulation position.
3.) Connect a DVI cable between the DVI-7320-Tx and the display.
4.) Connect the External AC Power Adapter to the DVI-7320-Tx.
5.) After a brief delay the red PWR LED will flash rapidly for 1-2 seconds, then turn
OFF for a moment and finally turn back ON.
The EDID has now been successfully stored in the DVI-7320-Tx.