User Manual for VGA/Stereo-Audio Matrix
COMM-TEC MTX Series
COMM-TEC GMBH
5 of 10
2.4 Back Panel
Back panel 8 x 8 with Audio
Depending on the model of the matrix, the video signal I/O interface is made up of 4 or 8 15PIN HD female
terminals for each channel. Audio signal I/O terminals are made up of 4 or 8 5pin captive screw terminals for
each channel (left & right together). The channel numbers of the signal I/O terminals start from channel 1 to the
maximum number of channels depending on the model. The left audio channel is indicated with L +/-, the right
channel with R +/-. Common ground is connected to the middle pin (grounding sign).
The MTX matrix switchers have an internal power supply with IEC female connector for power cord. There is a
9pin Sub D female connector for RS-232 port.
3. Installation
3.1 Hardware Installation
The MTX matrix switchers are rack-mountable using the holes in the front panel. Take a set of standard rack
screws and secure the unit into the rack. For ideal performance and easy wiring access it is advisable in a 19“
rack leave at least 1ru space above and below. Do not place high heat-producing equipment directly above or
below the enclosure.
3.2
VGA Connection
Use good quality 75Ohm coax cable for all video connections. Switch off all units while connecting sources and
destinations.
The VA MTX matrix switchers support VGA Computer Video signal sources. If the device doesn’t have VGA
output signal, use a VGA to RGBHV adapter cable or converter.
3.3
Audio Connection
VGA Matrix switchers with audio come with terminal block connectors (captive screw terminals connectors)
located under the 15PIN HD connectors. There are two types of audio signals: balanced or unbalanced.
Balanced audio cables carry two signals per channel and ground while unbalanced audio cables only use one
signal per channel and a common ground. Both signal types can be connected to the VA MTX series.
