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ECHO AIO

™

TEST INTERFACE

Product Manual

June 2017

© 2017 Echo Digital Audio

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Summary of Contents for AIO-1

Page 1: ...ECHO AIO TEST INTERFACE Product Manual June 2017 2017 Echo Digital Audio ...

Page 2: ...R 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 ...

Page 3: ...s 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 t...

Page 4: ...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 w...

Page 5: ...ations 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 ...

Page 6: ...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 ...

Page 7: ... 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 i...

Page 8: ...IO 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 hos...

Page 9: ...es 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 cha...

Page 10: ... 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...

Page 11: ...S interfacing are software controlled Full Scale Input Voltage and Dynamic Range Gain Setting Full Scale Input Voltage Dynamic Range A weighted x1 8 75V 110dB x10 875mV 105dB x100 87 5mV 95dB THDN A weighted 95dB 20Hz 20kHz Frequency Response 0 5dB 20Hz 20kHz Maximum Input Voltage 15V do not exceed Input Impedance 1MΩ Constant Current Supply 4mA 21V excitation voltage TEDS IEEE 1451 4 Class 1 ...

Page 12: ...d the speaker should be connected directly across them Both the and outputs are biased at 7 5V Note Connecting a speaker or other low impedance path from one of the outputs to ground will cause the amplifier to shut down If this happens the AIO needs to be power cycled for the amplifier to resume normal operation Output Power THDN 1 10W continuous at 1kHz Maximum Output Voltage 13 5V Frequency Res...

Page 13: ...S interfacing are software controlled Full Scale Input Voltage and Dynamic Range Gain Setting Full Scale Input Voltage Dynamic Range A weighted x1 8 75V 110dB x10 875mV 105dB x100 87 5mV 95dB THDN A weighted 95dB 20Hz 20kHz Frequency Response 0 5dB 20Hz 20kHz Maximum Input Voltage 15V do not exceed Input Impedance 1MΩ Constant Current Supply 4mA 21V excitation voltage TEDS IEEE 1451 4 Class 1 ...

Page 14: ...ts are differential with and ground connections For headphones or other low power speakers the ground connection may be ignored Both the and outputs are biased at ground Note Driving loads smaller than 32Ω will cause the amplifier to clip and or oscillate at higher output levels Output Power THDN 1 32mW continuous at 1kHz Maximum Output Voltage 2 65V Frequency Response 0 5dB 20Hz 20kHz ...

Page 15: ...S interfacing are software controlled Full Scale Input Voltage and Dynamic Range Gain Setting Full Scale Input Voltage Dynamic Range A weighted x1 8 75V 110dB x10 875mV 105dB x100 87 5mV 95dB THDN A weighted 95dB 20Hz 20kHz Frequency Response 0 5dB 20Hz 20kHz Maximum Input Voltage 15V do not exceed Input Impedance 1MΩ Constant Current Supply 4mA 21V excitation voltage TEDS IEEE 1451 4 Class 1 ...

Page 16: ...nt and Dynamic Range Gain Setting Full Scale SPKR Voltage Full Scale SPKR Current Dynamic Range A weighted x1 8 75V 4 375A 110dB x10 875mV 437 5mA 105dB x100 87 5mV 43 75mA 95dB THDN A weighted 95dB 20Hz 20kHz Frequency Response 0 5dB 20Hz 20kHz Calibrated Accuracy 0 25 Class D Amplified Outputs Two amplified outputs are provided for connecting speakers or other devices The first output is part of...

Page 17: ...ors The module functions as a TDM master sourcing the clocks and synchronization signals Logic voltage levels are hardware selectable between 1 8V and 3 3V using a jumper on the PCB The TDM interface may be programmed for number of channels bits sample bits frame sync type width polarity and placement and clock polarity The module always presents 10 channels of input and output to the host compute...

Page 18: ...audio APIs Most professional audio and test applications support ASIO which Echo recommends for use with the AIO Multi AIO Synchronization Every AIO has its own internal crystal for generating the audio clocks with a tolerance of 50ppm When set for a nominal sample rate of 48 000 sample sec the actual sample rates can vary up to 4 8 samples sec between two AIOs This causes problems if multiple AIO...

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