Wiring The Nxa-Avb/Rgb For Unbalanced Audio; Wiring The Nxa-Avb/Rgb For Balanced Audio - AMX NXD-1200VG Operation/Reference Manual

Touch Panel Accessories
• USB:
• PWR:
• ETHERNET:
• Video In BNCs:

Wiring the NXA-AVB/RGB for Unbalanced Audio

Most domestic audio equipment has unbalanced audio inputs and outputs. This means that the audio output (left, right, or
mono) appears on a single wire, and is referenced to "0 V" or "Ground". Typical connectors used are RCA "phono"
connectors, DIN plugs/sockets, and 0.25" (6.3mm) or 3.5mm jack plugs/sockets.
Unbalanced audio is adequate for most domestic environments and for line-level signals in a typical broadcast studio.
Problems may occur if the signals are carried over long distances, especially if the source and destination have separate
main supplies. Use the following wiring drawing (FIG. 5) to configure an unbalanced audio connection.
GND
IN-
IN+
GND
IN-
IN+
AUDIO IN
MIC OUT
GND
OUT-
OUT+
FIG. 5 Wiring the rear AUDIO IN and MIC OUT for use with Unbalanced Audio
When using unbalanced audio for the AUDIO IN connector (FIG. 5), the "-" and the "GND" terminals should be
connected together and then connected to the GND of the unbalance audio signal. When connecting to an unbalanced
audio input from the MIC OUT connector (FIG. 5), wire the "+" terminal to the signal input, and the "GND" terminal to
the signal ground.

Wiring the NXA-AVB/RGB for Balanced Audio

Professional audio equipment will often use balanced audio inputs and outputs, usually on 3-pin "XLR" connectors. A
balanced audio signal consists of a pair of wires carrying the audio signal in anti-phase with each other (if one wire
carries a positive voltage, the other carries an equal and opposite negative voltage).
The advantage of balanced audio over unbalanced audio is its ability to reject external interference added as the signal is
carried over the wire. The receiving equipment takes the voltage difference between the two wires as the input signal.
Interference will usually get added to both wires equally, and so gets cancelled by the receiving equipment.
18
Type-B USB device port input connector for pass-thru computer control. This port
provides two-way signal between the keyboard and mouse (connected to the rear/side
USB connectors on the Modero panel) through the front RGB connector on the
breakout box, out the rear USB Type-B connector, and then to/from the connected
computer.
2-pin 3.5 mm mini-Phoenix connector that connects to a 12 VDC-compliant power
supply. This port can be used to provide power to a Modero panel by sending it through
the NXA-AVB/RGB (rear power connector through to the front power connector).
RJ-45 connector routes data to the G4 panel through the front Ethernet port. These
connections use a standard CAT5 Ethernet cable to provide communication between
the target panel, box, and Master.
Feeds either Composite/S-Video Luma or S-Video Chroma signals into the NXA-AVB/
RGB. This feed is then redirected out to a Modero panel through the front Audio/Video
CAT5 port.
Note: Although the NXA-AVB/RGB Breakout Box can accept either a Composite or S-
Video input signal type, only one input source can be used at a time. This unit does
not auto-detect the incoming signal type. Using S-Video would require a cable split
and a simultaneous connection to both the COMP/Y and C connectors (which would
prevent an additional Composite signal from being fed into the unit). Do not connect two
Composite video signal cables to the COMP/Y and C connectors.
Unbalanced IN
Left Channel
(Jumper IN- to GND)
Unbalanced IN
Right Channel
(Jumper IN- to GND)
Unbalanced OUT
Microphone
VG Series Modero Touch Panels