Installation Guide
AT-OMNI-121
6
The AT-OMNI-121 provides the ability to embed 2-channel analog audio on the
HDMI OUT
port
or de-embed HDMI audio on the
AUDIO
OUT
port. De-embedded HDMI audio is downmixed to
2-channel PCM. This step is optional.
•
If
AUDIO IN
or
AUDIO OUT
will be used, then connect the included 5-pin captive screw
connectors, as shown below.
•
If both
AUDIO IN
and
AUDIO OUT
ports will be used, then connect the included 5-pin push
spring connectors, as shown on the next page.
Audio
2-channel analog audio output (bottom)
2-channel analog audio input (top)
AT-OMNI-121
ETHERNET
RS-232
AUDIO
OUT
IN
L
R
DC 48V
RX
TX
1
HDMI OUT
AT-OMNI-121
ETHERNET
RS-232
AUDIO
OUT
IN
L
R
DC 48V
RX
TX
1
HDMI OUT
IMPORTANT
:
Audio embedding and de-embedding, using the analog audio
outputs, requires the optional OmniStream power supply (AT-PS-48083-C).
The AT-OMNI-121 provides transport of RS-232 protocol over IP which allows communication
between a control system and an RS-232 device. This step is optional.
1.
Use wire strippers to remove a portion of the cable jacket.
2.
Remove at least 3/16” (5 mm) from the insulation of the RX, TX, and GND wires.
3.
Insert the TX, RX, and GND wires into correct terminal on the included captive screw
connector, following the wiring diagram below.
Note that the included 6-pin push spring connector can be used, if desired, in place of the
captive screw connector. Only the
RS-232 1
port is available on the decoder.
RS-232
GND
RX
TX
NOTE:
Typical DB9 connectors use pin 2 for TX, pin 3 for RX, and pin 5 for
ground. On some devices, the function of pins 2 and 3 are reversed.
