Phoenix Audio Technologies MT103E-HD User Manual

MT103E-HD Dual Microphone 16KHz Echo Canceling

System

The MT103E-HD is a DSP based, dual microphone, stereo echo cancelling daughter board.

Features

 The MT103E-HD is a dual microphone, single output, stereo, 16KHz Noise Canceling / Echo Canceling solution
 The MT103E-HD utilizes your own microphone and own loudspeaker. It provides both analog and digital

outputs

 Both the microphone(s) and the far-end inputs are connected through a 0.1” pitch header. User can design the

board to mount on its motherboard with mating connector, or connect to the MT103 through wires

 Controllable input level and phantom power supply via free downloadable utility
 Analog output through a 0.1” pitch header. User can design the board to mount on its motherboard with

mating connector, or connect to the MT103 through wires. digital output through USB connection

 Phoenix’s proprietary echo canceling, noise canceling, and AGC algorithms with no gating, to prevent the loss

of critical information

Phoenix Audio Technologies, 16 Goodyear Suite 120, Irvine, CA 92618; Tel [phone]

Fax [phone]

www.phnxaudio.com

Specifications

 32KHz sampling frequency; 100Hz-16KHz bandwidth
 Two levels of Echo Canceling aggressiveness and three levels of Echo Canceling speed
 Controllable tail length – up to 220 ms.
 Residual noise suppressed to the environment noise level to prevent pumping noise
 Eight preset color filters for both the output and the speaker signal
 Low latency (10msec)
 Microphone inputs connected to pins 1 and 2 of J1. The following microphone settings are available using the

setup software:

o Mic level (280mV peak-to-peak)
o Line level (2V peak-to-peak)
o add 6dB boost
o Optional 2.8V power supply (phantom) , via 1Kohm resistor

*Units are preset to Mic level without 6dB boost; Phantom On

Note: user can use a single microphone connected to either pin 1 or pin 2 of J1

o Far-end inputs connected to pin 3 and pin 4 of J1. The input setting is Line level (2V peak-to-peak)

Notes:

1) Far-End input will be received through the USB channel if it’s active

2) Only one far-end signal is required; the two inputs will support stereo loudspeaker systems

 System Output connected to the pin11 of J1. The following output settings are available using the setup

software:

o Line level: 2V peak-to-peak
o Mic level: 200mV peak-to-peak

*Units are preset to Line level

Note: Output will be transmitted through the USB channel if it’s active

 Speakers – (Far-end out signal) is connected to pin 13 and pin 14 of J1. The output setting is Line level: 2V

peak-to-peak

Phoenix Audio Technologies, 16 Goodyear Suite 120, Irvine, CA 92618; Tel [phone]

Fax [phone]

www.phnxaudio.com

Digital connector (J2)

Analog connector (J1)

Backup Reboot

USB

Power Indicator LED

Power

Alt Power (J6)

How to Connect:

Microphone input
Far end inputs
Analog outputs

5V
DGND

Reset
Shut Down

Phoenix Audio Technologies, 16 Goodyear Suite 120, Irvine, CA 92618; Tel [phone]

Fax [phone]

www.phnxaudio.com