Echo AIO-2 User manual

ECHO AIO™
TEST INTERFACE
Product Manual
June 2017
© 2017 Echo Digital Audio

AIO Product Manual
1
Contents
INTRODUCTION ........................................................................................................................................ 2
AIO CONFIGURATIONS............................................................................................................................ 3
AIO DIMENSIONS AND WEIGHT (ALL MODELS):................................................................................. 5
SAFETY INSTRUCTIONS.......................................................................................................................... 6
INSTALLATION.......................................................................................................................................... 7
AIO CHASSIS............................................................................................................................................. 8
AIO INTERFACE MODULE....................................................................................................................... 9
POWER SUPPLY ....................................................................................................................................... 9
AIO-A MODULE ....................................................................................................................................... 10
MICROPHONE/LINE INPUTS..................................................................................................................... 10
CLASS-D AMPLIFIED OUTPUTS ...............................................................................................................11
AIO-L MODULE........................................................................................................................................ 12
MICROPHONE/LINE INPUTS..................................................................................................................... 12
LINE LEVEL /HEADPHONE OUTPUTS.......................................................................................................13
AIO-S MODULE ....................................................................................................................................... 14
MICROPHONE/LINE INPUTS..................................................................................................................... 14
SPKR –VOLTAGE/CURRENT MONITORING INPUTS................................................................................. 15
CLASS-D AMPLIFIED OUTPUTS ...............................................................................................................15
AIO-T MODULE........................................................................................................................................ 16
TDM AUDIO INTERFACE .........................................................................................................................16
USB AUDIO.............................................................................................................................................. 17
MACOS(COREAUDIO)............................................................................................................................ 17
WINDOWS (ASIO) ..................................................................................................................................17
MULTI-AIO SYNCHRONIZATION............................................................................................................... 17

AIO Product Manual
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Introduction
The AIO (All-In-One) Test Interface is a USB audio interface compatible with Macintosh
and Windows computers. Along with a computer running test software, it provides a
platform for acoustic testing of cell phones, tablets, computers and their components.
The AIO combines the functionality of multiple pieces of test equipment into a single,
integrated device for increased reliability at a reduced cost. It is ideally suited for a
high-volume production environment where testing occurs on a continual basis.
The test computer and AIO communicate using a USB 2.0 Hi-Speed connection. The
AIO contains data converters along with input and output amplifiers needed for
connecting speakers, microphones, and other test equipment. Audio test tones are
played out through the AIO and the responses of the unit under test are then recorded
for analysis.
The AIO is a modular design consisting of a chassis, a USB Interface Module, and one
or two audio I/O modules. The Interface Module is included with every AIO and
provides the USB connection and power to the unit. To support different types of test
stations there are several types of audio I/O modules available for the AIO. These
differ in both the type and number of inputs and outputs available on the module.
Module types may be mixed within a single chassis, allowing for many different AIO
configurations. An AIO-S is shown below:
When a test station needs more inputs and outputs than a single AIO can provide,
multiple AIOs can be used together as a group. The audio clocks may be
synchronized, allowing them to act as if they were a single, integrated unit.

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AIO Configurations
The AIO Test Interface is available in seven models depending on what module types
are installed (AIO-A, AIO-S, AIO-L, AIO-T):
AIO
Model
Inner
Module
Outer
Module
Mic/Line
Inputs
10W
Outputs
Line/HP
Outputs
Imped/
Haptic
Digital
Sample
Rates
AIO-1
AIO-A
---
4
2
---
---
---
48, 96,
192 kHz
AIO-2
AIO-A
AIO-A
8
4
---
---
---
48, 96,
192 kHz
AIO-AT
AIO-A
AIO-T
4
2
---
---
TDM
10/10
48 kHz
AIO-L1
AIO-L
---
4
---
2
---
---
48, 96,
192 kHz
AIO-L2
AIO-L
AIO-L
8
---
4
---
---
48, 96,
192 kHz
AIO-LT
AIO-L
AIO-T
4
---
2
---
TDM
10/10
48 kHz
AIO-S
AIO-S
AIO-A
6
3
---
1
---
48, 96,
192 kHz
Table 1 –AIO Models
AIO-1 (AIO Test Interface with 1 AIO-A Module)
AIO-2 (AIO Test Interface with 2 AIO-A Modules)

AIO Product Manual
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AIO Configurations (cont.)
AIO-AT (AIO Test Interface with 1 AIO-A Module and 1 AIO-T Module)
AIO-L1 (AIO Test Interface with 1 AIO-L Module)
AIO-L2 (AIO Test Interface with 2 AIO-L Modules)
AIO-LT (AIO Test Interface with 1 AIO-L Module and 1 AIO-T Module)

AIO Product Manual
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AIO Configurations (cont.)
AIO-S (AIO Test Interface with 1 AIO-S and 1 AIO-A Modules)
AIO Dimensions and Weight (all models):
AIO alone:
17.5” (44.4 cm) x 8.75” (22.2 cm) x 1.75” (4.4 cm), 7.2 lbs (3.3 kg)
AIO in box with cables:
21” (53 cm) x 10” (25.4 cm) x 5” (12.7 cm), 8.75 lbs (4 kg)
Shipping carton (6 AIOs):
22” (55.8 cm) x 22” (55.8 cm) x 17” (43.1 cm), 59.5 lbs (27 kg)

AIO Product Manual
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Safety Instructions
1. Read Instructions –Be sure to read all of the safety and operating instructions
before operating this product.
2. Keep Instructions –The safety instructions and user's manual should be kept for
future reference.
3. Warnings –All warnings on your AIO and in the User's Manual should be followed.
4. Follow Instructions –All operating and use instructions should be followed.
5. Moisture –Water and moisture are detrimental to the proper operation of the AIO.
Do not install or operate your AIO near sources of water or moisture such as sinks,
damp basements, leaky roofs, etc.
6. Heat –Your AIO should be situated away from sources of heat such as heaters or
radiators.
7. Power Sources –This unit should be operated only from a stable AC power source
as indicated in this documentation or on the AIO. A surge protector is recommended in
areas that are subject to lightning or noise from industrial equipment such as that found
on a factory floor.
8. Grounding –Precautions should be taken so that the grounding capabilities of the
unit are not undermined. The AIO is provided with a cord with an equipment grounding
conductor and grounding plug. This plug must be plugged into an outlet that is properly
installed and grounded in accordance with all local rules and ordinances. Do not modify
the plug provided with the equipment. If the plug will not fit into your outlet, have a
proper outlet installed by a qualified electrician.
9. Power Cord Protection –Power supply cords should be routed so that they are
protected from damage. Pay particular attention to protecting the plugs, outlets, and the
point at which the cord exits your AIO.
10. Servicing –Do not attempt to service this unit yourself, as opening the case will
expose you to hazardous voltage or other dangers. All servicing should be referred to
qualified service personnel.

AIO Product Manual
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Installation
Power is supplied to the AIO with a three conductor AC power cable that plugs into a
locking IEC C14 power inlet located on the Interface Module.
Power cables supplied with the AIO may have a
locking connector to keep it from accidentally
coming loose. However, a cable with a standard,
non-locking plug may also be used.
The power cable has either a US or China style plug with three prongs, one of which is
ground. For safety (see above) and performance reasons, it is very important that
the AIO is plugged into a properly grounded outlet. It is also highly recommended
that the AIO, test computer, and any other equipment connected to the AIO are all
powered from the same AC power strip / source which includes surge protection.
To improve reliability and eliminate the possibility of broken switches, the AIO doesn’t
contain a power switch. Power needs to be turned on and off at the source. The blue
LED on the front panel indicates when power is applied and the AIO is operating.
The AIO requires a USB 2.0 “HI-SPEED”cable to connect to the host computer. It
plugs into a USB Type-B connector on the Interface Module.
The supplied USB cable has a connector with two
screws to securely connect it to the AIO and keep
it from accidentally coming loose. However, a
cable with a standard USB Type-B plug without
mounting screws may also be used.
Audio connections will vary according to the type of module and the equipment being
connected. These are described in the sections for each module type elsewhere in the
manual.

AIO Product Manual
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AIO Chassis
The AIO chassis is a steel case that measures 17.5” x 8.0” x 1.8” (44.5 cm x 20.3 cm x
4.6 cm). It has a blue LED within the front panel to indicate when power is applied.
Three bays are available on the rear for inserting the Interface Module and two audio
I/O modules:
A backplane runs along the front of the chassis with card edge connectors for each
module. Modules have tabs with gold fingers that are inserted into the backplane
connectors when installed. Signal traces on the backplane connect the Interface
Module to the analog I/O modules, allowing data and commands to pass between
them.
Each bay has guides on either side to align the module with the connector as it is
inserted. Two screws secure the module mounting plate on the rear of the module to
the chassis. Removing these screws allows modules to easily be pulled out for repair
or replacement as needed.
CAUTION: Always disconnect the power cable from the AIO before removing or
inserting modules!

AIO Product Manual
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AIO Interface Module
The Interface Module is the heart of the AIO. It provides DC power to the modules from
its integrated AC/DC power supply. An embedded processor on the module
communicates with the host computer via USB. This processor:
1. Automatically configures itself according to the types of audio modules that are
installed, then reports the AIO model type, channel counts, and other pertinent
information to the host computer.
2. Routes audio between the computer and the appropriate audio modules.
3. Controls the audio modules according to commands sent from the computer or
passes the commands on to any processors on the modules themselves.
4. Downloads software from the host computer onto any modules that require it.
5. Stores calibration data for modules that need it in flash memory, retrieving and
using it whenever the AIO is powered on.
The AIO is a USB Audio 2.0 Class compliant device.
Power Supply
The Interface Module has a 60W AC/DC power supply that converts the incoming AC
voltage to 15VDC. This voltage is converted to several other needed DC voltages by
voltage regulators on the interface and audio modules. AC input voltage may range
from 90 –264 VAC and be either 50 or 60 Hz.
CAUTION: The power supply has exposed high voltages present that pose a
shock hazard. Never remove the Interface Module or take off the AIO cover with
the AC power cable attached!