V e l o c i t y D V I E x t e n d e r P r o d u c t M a n u a l , R e v . G , M a y ,
2 0 1 3
Page 10
2.2. Basic operation
The system transmits video and data information from the Transmitter to the Receiver through fiber L1. The
data return path from the Receiver to the Transmitter is fiber L2.
VelocityDVI Extender Overview
2.3 Single Fiber operation, System-3
The unit will operate with a single fiber from the TX to the RX. In this mode of operation the TX can
transmit video and status LED information to the RX. The RX cannot send any information to the TX. In
this mode the RX buttons are inoperative. Also, DDC information can only be gathered from the TX local
port or the Thinklogical default EDID table.
2.4 Dual Fiber Operation, System-3
In this mode video information is transmitted from the TX to the RX over fiber L1. Fiber L2 is used as a
data return path from the RX to the TX. Providing a back channel from the RX to the TX allows the RX to
modify DDC configuration via the Acquire and Select buttons and allows the RX to send DDC information
to the TX. DDC information exchange allows the PC to gather information about the connected monitor to
determine the display properties.
2.5 Fiber Operation, System-6
System-6 operates in Dual-fiber or Triple-fiber operation. In dual-fiber operation, fibers L1 and L3 are used
to transmit data and video from the TX to the RX and in three-fiber mode, fiber L2 transmits data from the
RX back to the TX.
