Altinex VGA Line Receiver DA103-217 - Manual (Page 2)

AP-016 Rev 1 Page 2 of 6
Figure 2. Using the DA103-217 as line driver
In addition, the DA103-217 has circuitry to buffer EDID (Extended Display Identification Data)
signals from a computer and will transmit them 150ft to a display. Without the buffer, these
signals can be transmitted only 25ft, thus losing the monitor’s information for longer cable
lengths. By buffering EDID signals inside the DA103-217, a laptop connected to a display is
able to properly read the monitor's resolution and adjust its video card for the correct display
format and resolution. There may still be some limitations for older video cards that are not able
to display high definition resolution.
The DA103-217 is ideally suited to be located under a tabletop interconnect J-Box. In many
cases, tabletop J-boxes require video signal buffering for long cable runs. With its small size, the
DA103-217 fits neatly under a table for a trouble free installation.
Figure 3. Installing the DA103-217 with a tabletop J-Box
The DA103-217 also has built in EDID (Extended Display Identification Data) emulator
circuitry and is able to emulate any monitor or projector. In many cases when a laptop is
connected through AV switchers and amplifiers, the EDID information from a monitor is not
transmitted back to the laptop. Without this information, the laptop defaults to its native
resolution and may not be compatible with the display used. Since different laptop manufacturers
implement EDID slightly differently, the output from laptops will vary if EDID is not available.
When EDID information is available, then a laptop will adjust its video card output to be
compatible with the display’s resolution.