Attero Tech unBT2A User manual

Attero Tech, LLC
1315 Directors Row, Suite 107, Ft Wayne, IN 46808
Phone [phone] • Fax [phone]
www.atterotech.com
614-00034
unBT2A
User Manual
Date 03/14/2018
Revision 01_e
Bluetooth® Audio Wall Plate
Receiver for Pro-AV

unBT2A
User Manual
Attero Tech LLC 2018 Page 1 614-00034 Rev 01_d
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 earthing 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 a 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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User Manual
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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: Th
is 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 o
perated 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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Contents
1 – Overview.....................................................................................................................................................................................................................4
1.1 – What’s in the Box ..................................................................................................................................................... 4
2 – Product Features ....................................................................................................................................................................................................5
3 – System Connectivity .............................................................................................................................................................................................8
4 – Initial Device Setup ...............................................................................................................................................................................................9
4.1 – Factory Reset ........................................................................................................................................................... 9
5 – Mounting and Installation .............................................................................................................................................................................. 10
5.1 – Audio Connections................................................................................................................................................. 11
6 – Bluetooth® Operation ...................................................................................................................................................................................... 12
7 – 3rd Party Control................................................................................................................................................................................................... 13
7.1 – RS-232 Interface ..................................................................................................................................................... 13
8 – ARCHITECTS & ENGINEERING SPECIFICATION...................................................................................................................................... 14
8.1 – Device Specifications................................................................................................................................................ 1
APPENDIX A – Reference Documents...........................................................................................................Error! Bookmark not defined.

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1 – Overview
The unBT2A is single gang Decora style in-wall Bluetooth®audio interface used for adding Bluetooth®audio connectivity
to installed audio systems. The unBT2A can be used in any venue where there’s a need to stream Bluetooth®audio from
a smart phone, laptop, tablet or other Bluetooth®audio equipped smart device to the sound system. The unBT2A features
a simple and consistent pairing process to eliminate the frustrating experience users often have with consumer grade
Bluetooth®interfaces.
The unBT2A provides cost effective installation and flexibility by utilizing CAT-5 or better, unshielded cabling to transport
the analog audio outputs and control to the unBT2A-EXP break out box.
Through the unBT2A EXP expander, the unBT2A outputs balanced mono or stereo analog audio on 3-pin depluggable
connectors for easy connection to both professional audio equipment. The unBT2A USB port is used for initial product
setup at installation, and the unBT2A EXP has an RS-232 port for 3rd party control in installations featuring an integrated
control system.
Features:
oSingle gang Decora form factor for easy installation in space constrained applications
oSimple pairing one button pairing/connect process for standalone operation with LED indication of connection
status
oSimple serial control protocol for integration with 3rd party control system via RS-232 (Remote connection
management and status monitoring)
oConfigurable pairing button for flexible integration with and without 3rd party control systems
oBalanced mono/stereo analog outputs for interfacing to both commercial and consumer audio equipment
oUSB bus-powered connection for simple setup prior to installation and firmware update
(Configuration only – audio output not supported when powered via USB)
oCustomizable advertised friendly name for co-located device applications
oCompatible with most smartphones, Apple iPads, and Android tablets and laptop Bluetooth® audio devices
1.1 – What’s in the Box
The device comes supplied with the following:
o(1) unBT2A Wall Plate
o(1) unBT2A Expander
o(1) Single gang Decora cover plate cover w/mounting screws
o(1) Mini-USB 3ft cable
o(1) 24V AC/DC Power Supply

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2 – Product Features
Figure 1 – unBT2A Front Panel Features
1 Bluetooth® pairing/connect button
2 Bluetooth® status indicator
3 Power/ID/Error indicator (see note below)
*Note: The unBT2A is equipped with error reporting features. Upon power up, the power LED will initially light red and
then change to green if the device boots successfully. If the LED remains on solid red, this indicates a device failure. If
power cycling the unit does not correct this problem, contact Attero Tech technical support.

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Figure 2 – unBT2A Rear Panel Features
4 USB Configuration Port
5 unBT2A-EXP Port ( CAT5/6 connection for Audio, Power, and Control)
6 Recessed Factory Reset Switch

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Figure 3 – unBT2A-EXP Features
7 RJ45 – unBT2A Port( CAT5/6 connection for Audio, Power, and Control)
8 Balanced Audio Output Terminal Blocks
9 RS-232 Terminal Block
10 24V DC Power Input
11 Power Status LED

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3 – System Connectivity
The following diagram shows how an unBT2A may be integrated into a typical professional AV installation. In this example,
the analog outputs are interfaced to an audio DSP for processing and distribution throughput the venue. The RS-232 is
interfaced to a control system to allow extended control over the unBT2A. For a full description of the control API and
capabilities, please refer to the unIFY 3rd Party API documentation available at www.atterotech.com.
Figure 4 - unBT2A System Integration Diagram

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4 – Initial Device Setup
*Note: Once the wall plate is installed in the wall, the USB port used for configuration will not be accessible. It is
therefore recommended setup be completed before installing the wall plate into the wall.
The unBT2A features software configuration and status monitoring of the following device parameters using in Attero
Tech's unIFY Control Panel software (V2.1 or later):
oBluetooth® friendly name (Default: unBT2A)
ounBT2A status
oPairing button control
oMono/Stereo output selection
oAnalog output sensitivity
oRemote pairing activation/deactivation
oClear pairing list
The unIFY Control Panel software will install any necessary drivers required by the operating system for compatibility with
the unBT2A.
To configure an unBT2A, connect the mini-USB cable between the PC running unIFY Control Panel and the unBT2A. The
unBT2A can be bus powered via the USB for initial setup.
*Note: The audio outputs of the unBT2A will not operate while only connected to USB. However, the device will allow the
integrator to pair to the device and test any customizations applied to the device. If it is necessary to test the audio output
while connected to the USB, connect the full unBT2A-EXP in order to fully power the device.
Once the unIFY Control Panel application is open, select the unBT2A “Configuration” menu item from the “Tools” menu.
From here, the audio output mode can be configured based on the application needs. The mono output mode is useful
for systems that utilize mono playback systems and wish to maximize the input channel capacity of the system. The
mono output signal is the sum of both channels at 50% volume sent to each output. Stereo output mode sends the
left/right channels separately to each output at 100% volume. For a complete description of the software features, refer
to the unIFY Control Panel user manual.
4.1 – Factory Reset
The unBT2A has a factory reset option. Using it will reset all the devices parameters back to
their factory defaults. The devices IP address mode is also reset back to getting a dynamic IP.
Access to the factory reset button is through a small circular hole on the side of the unit.
To use the factory reset, be sure the unit is powered up and insert a small screwdriver or
paperclip into the hole to activate the factory reset switch. There should be a noticeable “click”
when it’s activated. Hold the switch in for 5 to 10 seconds and release the switch. If the factory
reset was successful, the left hand LED will briefly glow red and then change to green.If not,
the reset switch was not held in long enough.

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5 – Mounting and Installation
A typical installation will involve mounting the wall plate into a pre mounted single-gang or larger wall box, standard
drywall bracket or mud ring. Before starting, make sure the wall box where the unBT2A is to be installed is pre-wired with
a suitable CAT5e or better cable back to the unBT2A-EXP break out box.
With the unBT2A-EXP powered off, attach the CAT-5e cable from the unBT2A port of the unBT2A-EXP to the RJ45 on the
unBT2A. Apply power by plugging in the 24V DC power supply to the DC power input on the unBT2A-EXT. The power LED
on the unBT2A-EXT should illuminate green. Additionally, the unBT2A wall plate should also start up and once ready to
operate, the front panel power status indicator should also be illuminated green.
*Note: Upon power up, the power LED will initially light red and then change to green if the wall plate boots successfully.
If the LED remains on solid red, this indicates a device failure. If power cycling the BT2A does not correct this problem,
contact Attero Tech technical support.
With the cable attached, carefully place unBT2A into the wall box taking care to not trap the cabling. Once fully in place,
secure it with the screws provided. Once the unit is secured in the wall box, fit the Decora plate over the front of the unit
and secure it with the screws provided with it. It is recommended to not over-tighten the screws that attach the included
Decora wall plate to prevent cracking it.
Figure 5 – unBT2A Dimensioned Drawings

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Figure 6 – unBT2A-EXP Dimensioned Drawings
5.1 – Audio Connections
The unBT2A provides balanced audio outputs to external analog audio equipment. Refer to the following diagram for
connecting audio devices to the outputs of the unBT2A.
*Note: Unbalancing the analog outputs by only connecting one of the signal phases will result in increased audible
noise. Balanced cabling and connection must be used to ensure the integrity of the audio signal.
+
-
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 7 - Balanced Wiring Guide

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6 – Bluetooth® Operation
The unBT2Ais designed for two primary usage modes to facilitate a number
of professional AV applications.
Standalone Operation:
This usage model is intended for applications where casual users of a public
venue (sports bar, spa, stadium luxury box, fitness center) have access to
connect their devices to the audio system but headaches are minimized by
eliminating automatic reconnect and pairing history features.
In this mode, users connect their Bluetooth® audio enabled smart device by
simply pressing the front panel “PAIR” button. The blue Bluetooth® status
LED will begin flashing to indicate that the unBT2A is now visible to other
Bluetooth® devices and accepting pairings. This pairing period lasts 30
seconds after which the status LED will stop flashing and turn off and the
unBT2A will disable its Bluetooth® interface.
*Note: The default friendly name visible to other devices is “unBT2A”. This
name can be customized by the installer using the unIFY Control Panel
software (v2.1 or greater).
If a successful pairing is made during the pairing period, the status LED will
stop flashing and turn constantly on.
To disconnect a device from the unBT2A, press and hold the PAIR button for
5 seconds and then release it. The status LED will turn off, and the connection
will be reset. Another device may now be connected by repeating the pairing
process.
3rd Party Integration:
In this usage model, the unBT2A is integrated into a large AV system that
includes a 3rd party control system. Using the RS-232 control port and the 3rd
party programming API, integrators can customize the usage of the unBT2A.
The control system the ability to configure the following functions:
oLimit errant connections by disabling the front panel control
oImplement user privileges by only initiating the pairing/connect
process remotely through the control system user interface
oReport current unBT2A Bluetooth® interface status to the control
system
Figure 8 - Standalone Operation

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7 – 3rd Party Control
The RS-232 port on the unBT2A-EXP break-out box is intended for connectivity to 3rd party control systems for extended
integration of the unBT2A into professional AV applications. All configuration features of the unBT2A available to the
installer, except firmware updates, are also supported via the RS-232 interface.
The full command set that the unBT2A supports 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).
7.1 – RS-232 Interface
The RS-232 interface operates at 9600 baud (8-N-1 format. The maximum cable length including cabling between the
unBT2A-EXP and control device is 100 meters.

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8 – ARCHITECTS & ENGINEERING SPECIFICATION
The Bluetooth® interface unit shall provide two analog line level outputs on 3-pin depluggable connectors, software
switchable between -10dBV (consumer level) nominal output and +4dBu (professional level) nominal output.
The device shall have soft-ware selection of mono or stereo audio mode. Maximum audio output level shall be +20dBu in
the +4dBu mode, and +6dBu in the -10dBVmode.
The device shall have RS-232 real-time control of pairing and other user features over a 3-pin depluggable connector.
The device shall have a USB Mini-B style connector for initial setup.
The device shall be compatible with Attero Tech unIFY software for flexible control and monitoring in system applications.
The interface shall be compliant with the RoHS directive. The interface unit shall be compliant with the EMI/EMC
requirements for FCC and CE.
The interface shall be the Attero Tech unBT2A.

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8.1 – Device Specification
Physical Dimensions (unBT2A)
Width 1.7"
Height 4.2"
Depth 1.2"
Weight 0.2 lbs.
Physical Dimensions (unBT2A-EXP)
Width 5.75"
Height 1.125"
Depth 1.625"
Weight 0.15 lbs.
Product Compliance
FCC CFR 47 Parts 15B Class A
ICES-003
CE (EN55022)
RoHS
REACH
Physical Dimensions (unBT2A-EXP)
Temperature: 0 – 40° C
Audio Inputs
Input Types:
Stereo Bluetooth® v3.0 audio
receiver
(A2DP Profile only)
Range 10m (30ft) minimum
Audio Outputs
Output Type:
Two balanced line level with
automatic muting on loss of
A2DP audio stream
Phoenix-style 3.81mm de-
pluggable terminal blocks
Output
Sensitivity
+4 dBu / -10dBV
Software switchable
Output
Impedance:
200 Ohms balanced,
100 Ohms unbalanced
Maximum
Output
Levels:
+20 dBu (+4dBu Pro Mode)
+6dBu a (-10dB – Consumer
mode))
Max Cable
Length 100 meters, 24 AWG UTP
Audio Output Performance
Dynamic
Range: >87 dB
THD+N: <0.05% @ 1kHz, input signal
3dB below maximum
Frequency
Response 20Hz – 20kHz, +1dB /- 3dB
RS-232 Port
Baud Rate: 9600 bps
Data Bits 8
Parity None
Stop Bit 1
Max Cable
Length 100 meters, 24 AWG UTP