Transmitter - front
Receiver - front
Transmitter - rear
Primary and
secondary
DisplayPort
video
inputs
Audio
line
in/out
USB
link A
port
Power
input
USB
link B
port
Multi
function
Serial
port
Line In
jack supports
mini-TOSLINK
Receiver - rear
Audio
line
in/out
Power
input
Multi
function
Serial
port
Optional
B
link
Main
A
link
Line Out
jack supports
mini-TOSLINK
Primary and
secondary
DisplayPort
video
outputs
Video support
AdderLink XD522 works hard to transfer the highest possible video
bandwidth between the transmitter and receiver units. To allow for
the differing grades of CATx links used to join the transmitter and
receiver, AdderLink XD522 periodically checks the quality of link A
(the primary cable joining the transmitter and receiver). In this way it
can accurately determine which of two video transfer modes can be
supported. Please see the rear page for details about achieving good
quality links.
On the front panel, the
HR
indicator will illuminate when High Rate
mode is available, whereupon the available bandwidth for video
signals is more than doubled.
The manner in which bandwidth is made available to the two video
ports differs between the Low and High Rate modes, as described
here:
EDID management
AdderLink XD522 intelligently manages the EDID (Extended Display
Identification Data) information that each video display provides
(detailing their supported resolutions) before reporting them to
the host PC. In this way AdderLink XD522 can mask the resolution
modes that cannot be supported within the available bandwidth.
The display attached to Video port 1 will always be given priority. If
sufficient bandwidth does not exist for the modes declared by the
second display, then it will not be reported to the host PC.
High rate mode
This diagram indicates how the total bandwidth of the high rate mode can
be shared between the two video ports.
Video port 1 (which has priority) may take up 280 MegaPixels per second (of the
total 308 Mpix/sec bandwidth); while port 2 can use a maximum of 154 MPix/sec
(subject to port 1 using no more than 154 MPix/sec of the available total bandwidth).
For example:
A single WQXGA
mode display could
consume nearly
all of the port 1
bandwidth alone,
or...
... two WUXGA
mode displays could
share the total
evenly.
Note: The example modes shown here are for illustrative purposes and are based
upon average requirements for current video displays. Video displays from some
manufacturers may consume more signal bandwidth than those shown here.
* All approximate video mode bandwidth figures are quoted with reduced blanking.
During low rate mode, the secondary video
port is disabled and a total bandwidth
of 148.5 MegaPixels per second is made
available to the primary video port. This
is more than enough to support a single
1080P video display.
Low rate mode
Optional
B
link
Main
A
link
Front panel
indicators
(see rear
page)
Hi-Speed
USB port
True
Emulation
USB port
Headphone/
microphone
sockets
True
Emulation
USB ports
Front panel
indicators
(see rear
page)
