User guide
HDMI 4x4 Matrix Switcher User Guide  3 
Rear panel 
Figure 2: Rear panel of the HDMI 4x4 switcher 
(1)  GROUND 
Connection point for equipment grounding. 
(2)  INPUTS 
Four HDMI input ports. Connect them to the HDMI ports on the 
signal sources. 
(3)  OUTPUTS 
Four HDMI output ports. Connect them to the HDMI ports on the 
output source devices. 
(4)  IR EYE 
A .25 in. mono jack for rear connection of IR control. 
(5)  RS232 
The serial port for unit control, 9-pin female connector. Connects 
with a control device, such as a PC. 
Note: Be sure to fill in the corresponding communication protocol 
parameters correctly. 
(6)  Power input 
Connect with the power adaptor. Indicator light is on when the 
switcher is powered. Be sure to use the adapter that came with the 
unit. 
System connection 
Usage precautions 
  The system should be installed in a clean environment with the property 
temperature and humidity controlled. 
  All devices should be connected before powering on. 
  The Cat5e/Cat6 terminations for HDBaseT devices should be a straight-thru 
TIA/EIA T568B standard. 










