Audio echo canceller provides the most advanced ultra-wideband
acoustic echo cancellation technology in the industry to completely
eliminate acoustic echo between speakers and microphones. Its
echo path length can be set to support the maximum echo tail up to
512ms and can be detected with both parties talking at the same
time. It is also effective even in strong background noise and
nonlinear distortion environment, and the residual echo during the
double-talking does not increase; Build-in noise suppression
algorithm can eliminate environmental noise. In addition,
automatic gain control algorithm is added. More surprisingly, it
brings full adaptation with no debugging required to audio
engineers.
The front panel of the equipment is provided with power supply
indicator and status indicator,displaying the running status of
equipment.When the relative channel indicator front panel glows
green feedback cancellation protocol will be
standby.Conversely,indicator glows orange and echo cancellation
funcion will be enabled.
(1) Select the slave canon, XLR / 6.35mm plug according to the plug type
of the audio equipment. Please note that the corresponding relationship
between the input channel and output channel. For example, the voice of
the input channel is output from the output channe 1 only.
(2) Adjust the gain of the input channel according to the site effect
GAIN(0~50DB).
(3) Bypass function setting.Push on “Bypass X”,the relative channel
indicator front panel glows green echo cancellation protocol will be
standby.Conversely,indicator glows orange and echo cancellation funcion
will be enabled.
01
02 03
MANUAL OF ACOUSTIC ECHO CANCELLER
!
WARNINGS
Keep the device always from the water or moisture to avoid cathing fire
or electric shock.
INTRODUCTION
SPECIFICATIONS
USAGE
Front Panel Indications
：
Rear Panel Indications：
AUDIO OUT 1
AUDIO IN 1
The signal processed by DSP
will be sent as audio input of
video conferencing host.
(MIC signal from a
mixer,sound console or other
devices)
AUDIO OUT 2
AUDIO IN 2
(Output to th e audio dev ice in the
next stag e,for examp le,power
amplifi er,sound co nsole.)
(Audio output signal from
video conference.)
BYPASS
A/D
DSP:AEC,AN S
D/A
GAIN
D/A
A/D
GAIN
Digital signal processing
Echo cancellation(adaptive)、background noise
reduction、gain control
Sound transmission gain:10 dB
Background noise reduction:14 dB
Frequency response 20Hz—20kHz
THD =0.002%@1kHz,+12dBu
Microphone input
XLR /6.35 mm plug
maximum input level:18dBu
Input impedance:=5KΩ
Input gain:0-50dB
Line output
XLR / 6.35 mm plug
maximum output level:18dBu
Output impedance:100Ω (Balance)
Environmental
requirements
Operating temperature:0℃－50℃
Storage temperature:-30℃－70℃
Humidity: 80% maximum, no n-condensing
General characteristics
Surface decoration: metal front panel
Plating-coated steel chassis
Dimensions H ×W×D:430× 242× 44 mm
Display LED
Weight (kg) 2.4Kg
Power voltage 12V DC,2A
Power consumption <10W
Parts Warranty 1 year
(1) Power:power supply switch
(2) 12V/2A:Power supply socket
(3) LAN:Network access,used for upgrading program.
(4)BYPASS:Bypass functions selection.
(5) Audio Out: Output channel , with XLR / 6.35 mm plug，
outputting the audio signal of correspond input channel after
processing.
(6) GAIN:Adjust the gain of correspond channel.
(7) Audin In:Input channel,with XLR/6.35mm plug.
(4 pages)
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