Polycom Vortex EF2280, Reference Manual

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I
NTRODUCTION
© Polycom, Inc. 3 V
ORTEX
EF2280 Reference Manual
I
NTRODUCTION
Welcome
Congratulations on your purchase of the Vortex EF2280!
How to Use This
Manual
This is a reference manual for your EF2280. It is structured to provide the
information you need quickly and conveniently. The following is an overview
of each section:
• Introduction
•
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 consideration when integrating the EF2280 with surrounding equip-
ment in your system.
• 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.
• Conference System Design
gives suggestions on topics to consider when
designing your system.
• EF2280 Block Diagram
shows the inside of the EF2280.
• Connector Pinouts
shows pinout diagrams for EF2280 input and output
connectors.
• 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.
About the EF2280
The EF2280 is a 12-input, 12-output, 8-channel acoustic echo and noise can-
celler 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 cancellation 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 27 x 18
main matrix, four 7 x 3 submatrices, and one 7x2 submatrix. The 27 x 18
main matrix has the following inputs: input channels 1-8 (gated or ungated),
input channels A-D, the internal signal generator, 3 mixes of each of the four
digital busses (3 mixes times 4 busses equals 12 inputs), and two mixes of
the phone bus. The 27 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 audio paths, 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