Phoenix Audio Technologies MT103KSK User Manual

MT103KSK Four Microphone, Beamforming, & Echo

Canceling Kiosk Kit

The MT103KSK is a DSP based, four microphone, beamforming, stereo, and echo canceling
daughter board ideal for Kiosk solutions.

Features

 The MT103KSK is a four microphone, beamforming, single output, stereo, 8KHz Noise Canceling/Echo Canceling

solution

 The MT103KSK utilizes two, two-split Phoenix Audio microphones and your own loudspeaker. It provides both

analog and digital outputs

 The 4 microphones 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 MT103KSK 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-KSK through wires

 Digital output through USB connection
 Phoenix’s proprietary echo canceling, beamforming, noise canceling, and AGC algorithms with no gating, to

prevent the loss of critical information

Specifications

 16KHz sampling frequency; 100Hz-8KHz bandwidth
 Two levels of Echo Canceling aggressiveness and three levels of Echo Canceling speed
 Controllable tail length – up to 200 ms.
 Three levels of noise reduction: 8dB (Low), 14dB (Medium), and 20 dB (High), selectable through the free

control software

 Residual noise suppressed to the environment noise level to prevent pumping noise

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

Fax [phone]

www.phnxaudio.com

 Eight preset color filters for both the output and the speaker signal
 Low latency (10msec)
 The 4 microphone inputs are connected to pins 1, 2, 3, & 4 of J1. The following microphone settings are

available using the setup software:

o Mic level (140mV peak-to-peak)
o Line level (2V peak-to-peak)
o Add 6dB boost
o Optional 2.8V power supply (phantom) , via 1 KOhm resistor

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

Note: User has the option to use a single microphone connected to either pin 1, 2, 3, or 4 of J1. However, it is
recommended that the provided microphones are used and that all four are connected to maximize beamforming
and audio clarity.

o Far-End Inputs connected to USB and J1 pin 6. The input setting is Line level (2V peak-to-peak)

Notes:

1) Far-End Input will be received through the USB channel only.

 System Output connected to the pin12 of J1 and USB. 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 and pin 12 of J1 and USB.

 Speakers – (Far-end out signal) is connected to pin 11 and pin 13 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

How to Connect:

Digital connector (J2)

Analog connector (J1)

Backup Reboot

USB

Power Indicator LED

Power

Alt Power (J6)

Microphone input
Far end inputs
Analog outputs

Reset
Shut Down

5V
DGND

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

Fax [phone]

www.phnxaudio.com