Black Box AC1120A User Manual

 

 

 

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 

 

 

Figure 2 - Audio and video inputs on AC1123A 

 

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.