Attero Tech unA4O AES67 User manual

614-00048 Rev 01 Attero Tech LLC 2018
4/23/2018
AES67 Four Output Interface

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
IMPORTANT SAFETY INSTRUCTIONS
The symbols below are internationally accepted symbols that warn of potential hazards with electrical products.
This symbol, wherever it appears, alerts you to the presence of un-insulated dangerous voltage inside the enclosure -- voltage
that may be sufficient to constitute a risk of shock.
This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature.
Please read the manual.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce
heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the
other. A grounding type plug has two blades and third grounding prong. The wider blade or the third prong is provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they
exit from the apparatus.
11. Only use attachments/accessories specified by Attero Tech
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
13. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
14. Unplug this apparatus during lightning storms or when unused for long periods of time.
15. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as
power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has been dropped.
16. This apparatus shall be connected to a mains socket outlet with a protective earth connection.
17. When permanently connected, on all-pole mains switch with a contact separation of at least 3mm in each pole shall be incorporated
in the electrical installation of the building.
18. If rack mounting, provide adequate ventilation. Equipment may be located above or below this apparatus but some equipment
(like large power amplifiers) may cause an unacceptable amount of hum of may generate too much heat and degrade the
performance of this apparatus,
19. This apparatus may be installed in an industry standard equipment rack. Use screws through all mounting holes to provide the
best support.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
LIMITED FIVE YEAR WARRANTY
The equipment is warranted for five years from date of purchase from Attero Tech, LLC against defects in materials or workmanship. This
warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to
used or demonstrator equipment. Should any defect develop, Attero Tech, LLC will, at our option, repair or replace any defective parts
without charge for either parts or labor. If Attero Tech, LLC cannot correct the defect in the equipment, it will be replaced at no charge with
a similar new item. Attero Tech, LLC will pay for the cost of returning your equipment to you. This warranty applies only to items returned
to Attero Tech, LLC, shipping costs prepaid, within five years from the date of purchase. This Limited Warranty is governed by the laws of
the State of Indiana. It states the entire liability of Attero Tech, LLC and the entire remedy of the purchaser for any breach of warranty as
outlined above. NEITHER ATTERO TECH, LLC NOR ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT SHALL BE LIABLE
FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL, OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS
EQUIPMENT EVEN IF ATTERO TECH, LLC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF
ATTERO TECH, LLC EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE EQUIPMENT.
This warranty gives you specific legal rights. You may have additional legal rights which vary from state to state.
Note: This equipment
has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules and EN55022. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a
commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in
a residential area is likely to cause harmful interference,
in which case the user will be required to correct the interference at their own expense.
This symbol means the product must not be discarded as household waste, and should be delivered to an appropriate collection
facility for recycling. Proper disposal and recycling helps protect natural resources, human health and the environment. For
more information on disposal and recycling of this product, contact your local municipality, disposal service, or the business
where you bought this product.

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
Contents
1 – Overview ..........................................................................................................................................................................................................................................................5
1.1 – What’s in the Box ................................................................................................................................................................................... 5
1.2 – Optional Extras....................................................................................................................................................................................... 5
2 – Device Installation.......................................................................................................................................................................................................................................7
2.1 – Mounting ................................................................................................................................................................................................ 7
2.2 – Status LEDs............................................................................................................................................................................................. 8
2.3 – Hardware Connections ........................................................................................................................................................................... 8
2.3.1 – Balanced Output to Balanced Input ............................................................................................................................................... 8
2.3.2 – Balanced Output to Unbalanced Input ........................................................................................................................................... 8
3 – Device Configuration.................................................................................................................................................................................................................................9
3.1 – AES67 Audio Network Note.................................................................................................................................................................... 9
3.2 – IP Address Setup .................................................................................................................................................................................... 9
3.3 – Factory Reset ........................................................................................................................................................................................ 10
3.4 – Firmware Updates ................................................................................................................................................................................ 10
3.5 – 3rd Party Control.................................................................................................................................................................................. 10
4 – ARCHITECTS & ENGINEERS SPECIFICATION ................................................................................................................................................................................. 11
4.1 – Device Specifications............................................................................................................................................................................ 11

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
1 – Overview
Figure 1 - unA4O front and back
The unA4O is a 4 output AES67 audio interface. It's ideal for
adding 4 analog outputs driven from up to 4 different AES67
audio streams in a small, unobtrusive form factor for installed
sound applications. The outputs also use 3-pin de-pluggable
connectors and each provides a balanced line level output. Each
output also features software adjustable volume control.
Connection to the audio network is provided by a single Ethernet
RJ45 connector on the back of the unit.
The unA4O can be powered by a 24V DC wall wart (ordered
separately) but also supports the use of PoE. This allows the
unA4O to be powered over the network cable from a suitable PoE
source (IEEE802.3af). The PoE power option is particularly useful
if the unA4O is mounted in a remote location where access to a
mains outlet is limited or unavailable.
The unit comes in a small form factor with integrated mounting
brackets allowing it to be mounted discretely in small spaces
(such as under desks) close to the sources or sinks reducing the
amount of analog cabling that may be required.
1.1 – What’s in the Box
The unA4O comes supplied with the following:
ounA4O device
1.2 – Optional Extras
The following are available as options for the unA4O and may be
ordered separately:
oA 24 V DC power supply is available if PoE power is not
desired or available – P/N: 900-00175-01

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
*Note: The unA4O has a label on one of the mounting flanges that shows the MAC address. This is important for initial device identification
as the last 6 digits make up part of the devices default network name. The full MAC address is also given on the bottom of the unit.
REAR PANEL
3 – Power Socket – Use with optional 24V DC wall
wart only
4 – Ethernet interface connector and indicators
5 – 4 x Balanced line audio outputs
FRONT PANEL
1 – Status LEDs
2 – Recessed Factory Reset Switch
DEVICE FEATURES

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
2 – Device Installation
2.1 – Mounting
It is recommended that the unit be secured to a flat surface with a screw through each mounting flange. Dimensions for mounting are
show in the Figure 2 below. Use a No. 6 screw of a type and size that is applicable to the surface to which the unA4O will be attached.
Figure 2 - Mounting Information
*Notes for mounting: All connections to the unA4O should be
made before the power is applied.
oAttach the outputs to the required audio devices. The
outputs are balanced so be sure to check what input type
the device to be connected requires in order to find how
to connect it correctly (see Hardware Connections section
2.3 for further details).
When powering using PoE:
oAttach the network port to a spare PoE-enabled port on a
PoE switch using a CAT-5e/6 cable. If a mid-span injector
is being used, connect a spare input port to the audio
network switch using a CAT-5e/6 cable, and then connect
the corresponding output port to the network port of the
unA4O.
When powering using an optional external supply:
oAttach the network port to a spare port on the audio
network switch using a CAT-5e/6 cable.
oAttach the power supply to the power input jack and then
power up the external supply.
If all steps are performed correctly, the power light on the front
should be lit. Some of the status LED’s may also be lit or flashing.
There may also be some activity on the unA4O Ethernet connector
LED indicators. With no network, both LEDs will remain off. If an
active connection is made both LEDs will come on and if there is
network activity, the yellow LED will then flash.

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
2.2 – Status LEDs
The front panel LED’s show the AES67 diagnostic status. If
network or audio problems persist, these LED’s may assist in
resolving the issue.
The three LED’s are SYS, ERROR and SYNC and the color of each
LED has different meanings. The tables below show the
combination and what each combination means.
Color Description
Red System booting
Orange Ethernet connection lost
Green AES67 Interface ready
Color
Description
Red Assigned AES67 stream not being
received
Color Description
Red PTP error / no PTP sync / PTP
disabled
Green PTP sync, slave
Flashing
Green PTP sync, master
2.3 – Hardware Connections
The unA4O drives either unbalanced or balanced audio devices.
Refer to the following diagrams and instructions for connecting
different types of audio devices. Professional grade audio cabling
is recommended to achieve the best audio performance
throughout the system
2.3.1 – Balanced Output to Balanced Input
+
-
3-Wire Cable
Pin 1
Pin 2
GND
Balanced Output
Terminal Block Plug
Pin 3 12
3
XLR-M
+
-
3-Wire Cable
Sleeve
Tip
GND
Ring
12
3
TRS Plug
Balanced Output
Terminal Block Plug
Figure 3 - Balanced Wiring Guide
2.3.2 – Balanced Output to Unbalanced
Input
Balanced Output
Terminal Block Plug
2-Wire Cable
Sleeve
Tip
TS Plug
Balanced Output
Terminal Block Plug
+
-
2-Wire Cable
Sleeve
Tip
RCA Plug
GND
+
-
GND
Figure 4 – Unbalanced Wiring Guide

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
3 – Device Configuration
There are two parts of the device that require software to setup.
First the configurable features of the device itself and second, the
audio routing.
The unA4O device control functions allow adjustment of analog
output volumes and muting as needed per channel. Volume can
be set between 0 and -60dB.
Configuration of the unA4O specific features is carried out using
the Attero Tech unIFY Control Panel application. This application
is available from the Attero Tech customer portal
at https://portal.atterotech.com/home/. See the unIFY Control
Panel manual for details on adjusting these settings.
*Note: The unA4O settings are volatile and parameter changes
will be lost if the unit is reset or power cycled. However, unIFY
Control Panel can be used to save presets and change the power-
on defaults to prevent loss of settings. This is a manual process
and is not automatic. This is done in our unIFY software by using
the "Save Preset" button and clicking the "Save to Device" button
with the "Default" option selected. See the unIFY Control Panel
manual for steps to save.
The audio routing is also done using Attero Tech’s unIFY Control
Panel. There is a tab on the devices configuration for each unit
specifically for setting up receive and transmit streams.
*Note: When using unIFY Control Panel, the unA4O will be shown
using a default device name of unA4O-###### where ‘######’ is
the last six characters of the devices MAC address.
3.1 – AES67 Audio Network Setup
For successful deployment of Attero Tech’s AES67 enabled
products, it is necessary to insure the AES67 audio network is
properly configured. A Quick Start Guide for AES67 Audio
Networking is available from the Attero Tech Customer Portal
at https://www.atterotech.com/resources/aes67-audio-
networking-quick-start-guide. As setup needs may vary by
product, it may also be necessary to check with the AES67-
enabled product manufacturer as well.
3.2 – IP Address Setup
*******************************************************************
IMPORTANT
*******************************************************************
Failure to correctly configure IP addresses will not allow a
unA4O device to correctly authenticate in the unIFY Control
Panel software. The output channels won’t be visible and
routing of audio from the unA4O will not be possible.
*******************************************************************
In order to configure a unA4O both to set up its internal
parameters and also setup audio routing, the PC will need to be
able to communicate with it over the network. While all AES67
devices will be discovered regardless of the IP address setup on
the PC, communication can only occur if the PC and the device
have compatible IP addresses.
By default, unA4O is set to get a dynamic IP address. Like
almost all network devices, if the unA4O device does not find a
DHCP server to retrieve an IP address from, it will give itself a
local link address (sometimes also known as an automatic
private IP address or APIPA) instead. A local link address is
always in the range 169.254.x.y.
To ensure communication, the PC can either be set to get a
dynamic IP address, or be given a static IP address in the range
169.254.x.y. The PC may require a restart for the changes to
take effect.
In some applications, IP addresses of devices may need to be set
to something specific and that can be done once initial
communication has been established. Bear in mind however that
if a static IP address is assigned to a device and that static IP
address is in a different range to the IP it was previously using
to communicate with the PC/Mac, the PC/Mac will lose
communication with the device until such time as the PC/Mac IP
address is also changed to an IP in range of the devices new IP
address.

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
3.3 – Factory Reset
*******************************************************************
IMPORTANT
*******************************************************************
The factory reset returns the entire device to its factory defaults.
Using this feature will mean all custom AES67 settings and all
audio power-on default settings will be cleared.
*******************************************************************
*NOTE: The factory reset is a useful way of quickly restoring
communications with a device which has an unknown static IP
address as a factory reset returns the device’s network settings
to getting a dynamic IP. Having successfully completed a factory
reset of the device, setting the PC’s IP address to also obtain a
dynamic IP address should then allow the PC to communicate fully
with that device.
The factory reset button is accessed through a small hole on the
front of the unit using a small screwdriver or a paperclip. A factory
reset is initiated by pressing and holding this button for 5
seconds or more while the device is running and then releasing
it. If done correctly, the status will change state as the unit goes
through a reset process. If the LED’s remain green immediately
after releasing the button, that is an indication the button was not
held for long enough and the factory reset was not applied.
Having applied a successful factory reset, on the AES67 side,
customized device name and channel names will be cleared, the
transmit stream data cleared and disabled and any receiver
stream data will be removed. The network settings will also be
reset so the device will return to retrieving an IP address
dynamically. The power-up defaults for the audio settings are also
cleared. For every output, output volume is set to maximum (0dB)
and the output mute is disabled.
3.4 – Firmware Updates
The unA4O has the ability to be updated. Updates are applied
via the network using Attero Tech unIFY Control Panel’s Smart
Firmware update facility. The latest unA4O SFU file is available
from the Attero Tech customer portal.
3.5 – 3rd Party Control
The unA4O supports 3rd party control allowing external system to
manage the unA4O’s settings such as phantom power, mic/line
gain options and control of presets. The interface which is
available to anyone to use with any device capable of sending and
receiving UDP messages.
Information on the commands the unA4O supports as well as
details of how to use the 3rd party UDP interface can be found in
the unIFY 3rd party Software API document, available from the
registered users section of the Attero Tech website (Go
to www.atterotech.com and click on the log-in option).

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1315 Directors Row Suite 107 Fort Wayne, IN 46808 ⁞[phone] ⁞www.atterotech.com
4 – ARCHITECTS & ENGINEERS SPECIFICATION
The AES67 break out Interface shall have four balanced line analog outputs. Each analog output shall be capable of being driven from an
AES67 audio stream.
Each output channel shall have adjustable gain between 0dB and –60dB in 1dB increments plus a mute, selectable via software on a per
channel basis.
All parameter changes will be non-volatile and self-restoring in the event of AC or PoE power interruption.
The unit shall accept either +24VDC or IEEE 802.3af standard PoE as power input. The unit shall be compliant with FCC 47CFR Parts 15B
and 18 (Class A), EN 55011, ICES-003, CE (EN55022 Class A and EN55024 Class A), and RoHS requirements.
The unit shall be the Attero Tech unA4O Output Interface
4.1 – Device Specifications
Audio Network
Physical Level Standard Ethernet
Connector Single RJ-45
Cable Quality CAT-5e or better
Transmission Speed 100 Mbps
Supported Sample Rates 44.1kHz
48kHz
Minimun Latency 1ms
Power Requirements
PoE 802.3af PoE PD compliant
Power Consumption < 5W Max
Cable Quality CAT-5e or better
Physical Dimensions
Width 6.45"
Height 1.06"
Depth 3.45"
Weight 0.8 lbs.
Regulatory Compliance
Certifications
FCC CFR 47 Parts 15B Class A, EN55011
ICES-003
CE (EN55022 / EN55024)
RoHS
REACH
Analog Audio Outputs (Terminal Block)
Output Type Balanced line level with automatic muting on loss of
AES67 signal
Output Volume -60 dB to 0dB in 1 dB steps
Maximum Output Level +20dBu (@ 0dBFS)
Audio Performance
Output Noise <-80dBu @ 0dB gain
System THD <0.01% at an output level 3dB below maximum