Introduction; How To Use This Manual - Polycom Vortex EF2280 Reference Manual

I
NTRODUCTION
Welcome
How to Use This
Manual
About the EF2280
V EF2280 Reference Manual
ORTEX
Congratulations on your purchase of the Vortex EF2280!
This is a reference manual for your EF2280. It is structured to provide the informa-
tion you need quickly and conveniently. The following is an overview of each sec-
tion:
•

Introduction

• Conference System Design gives suggestions on topics to consider when design-
ing your system.
• Pre-Installation includes information about the contents of the box, tools needed
for installation and front and rear panel descriptions.
• Installation covers connections of inputs/outputs and calibration of inputs of the
EF2280.
• Integrating the EF2280 Into Your System describes adjustments to take into con-
sideration when integrating the EF2280 with surrounding equipment in your sys-
tem.
• LCD Menu Structure describes an overview of the LCD menu structure and also
gives a system overview of features and options available.
• Troubleshooting helps to debug problems with installation.
• Technical Specifications provides the technical specifications of the EF2280.
• EF2280 Block Diagram shows the inside of the EF2280.
• Connector Pinouts shows pinout diagrams for EF2280 input and output connec-
tors.
• Warranty Information
• Definition of Terms explains terms used in this manual, as well as terms used in
our technology of echo cancellation, noise cancellation, and audio conferencing.
The EF2280 is a 12-input, 12-output, 8-channel acoustic echo and noise canceller
with matrix mixing and automatic microphone mixing capabilities. It includes a total
of 12 analog inputs (8 mic/line level inputs and 4 line level inputs), 12 analog outputs,
and 4 digital expansion busses. Acoustic echo cancellation (AEC) and noise cancel-
lation can be applied to each of the 8 mic/line level inputs, and each of these inputs
can then be sent to one of the two internal automatic microphone mixers. The system
also contains a 25 x 18 main matrix, and four 7 x 3 submatrices. The 25 x 18 main
matrix has the following inputs: input channels 1-8 (gated or ungated), input channels
A-D, the internal signal generator, and 3 mixes of each of the four digital busses (3
mixes times 4 busses equals 12 inputs). The 25 x 18 main matrix has the following
outputs: outputs 1-8 and A-D, AEC reference 1 and 2, and W, X, Y, and Z outputs to
the digital expansion bus. The EF2280 has 24 bit resolution, 32-bit floating point
computation, and a 48 kHz sampling rate.
Polycom's proprietary noise cancellation on each of the 8 mic/line inputs helps to
keep overall ambient noise to a minimum. Polycom echo cancellers are the only ones
on the market to feature this patent pending technology. Noise cancellation filters out
ambient background noise such as noise from heating, ventilating and air condition-
ing (HVAC), LCD projectors, and road noise. Our noise cancellation technology is
not a noise gate. It actually removes noise. Therefore, it enhances the operation and
2 Technical Support: 800.932.2774
I
NTRODUCTION