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8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control
2.0 Installation
The matrix is housed in a 2RU 19" wide rack mountable enclosure. All of I/O,
control, and the power connections are on the rear of the unit.
Figure 1 – Rear panel of AC1123A showing all the connections
2.1 Input Audio & Video Connections
The video connectors are HD15 female. These are compatible with PC's VGA
video signal (RGBHV). The Matrix is also compatible with analog SD or HDTV
signals (YPbPr) with resolutions from 480i to 1080p. To connect these types of
signals to the Matrix, HD15 to 3-RCA cables may be required.
The HD15 inputs of the matrix handle only the color and sync signals. EDID
(extended display identification data) is absent. EDID is normally used by the
source PC to read pertinent information from the connected display. This
information includes a list of the resolutions that are supported by the LCD. If
EDID is not implemented, the source PC is unaware of the specific LCD
connected to it. Generally this is not a problem since in the absence of EDID,
most PC's allow the user to select from a set of default resolutions for output.
Some PC's may not output any video signal, or only allow limited resolution
settings with the absence of EDID . One way to resolve this is to change the
display settings of the PC to show all modes and not detect Plug and Play
LCD. The procedure for doing this varies depending on the operating system
and the video card in the PC. It is generally found under: Control Panel >
Display Settings > Advanced > Monitor tab. Alternatively a pass-through EDID
emulator can be used. This a piece of hardware that is sold separately.
Figure 2 - Audio and video inputs on AC1123A
Technical Note about the Video Inputs
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