Polycom Vortex EF2280 Reference Manual

INTRODUCTION
© Polycom, Inc. 3 VORTEX 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

Polycom Vortex EF2280 Specifications

General

Rack capacity	1U
Frequency range	20 - 20000 Hz
Cancellation span	270 ms
Echo cancellation	65 dB
Phantom power	48 V
Nominal input level	0 dB
Output gain	-100 - 20 dB
Output impedance	33 Ω
Maximum output amplitude	23 dB
RS-232 ports	1
Audio connections	2 x 3.5mm
Parallel ports quantity	2
Input voltage	110 - 240 V
Output current	20 mA
Output voltage	5 V
Input frequency	47/63 Hz
Power consumption (typical)	30 W
Operating temperature (T-T)	0 - 40 °C

Weight and Dimensions

Weight	1800 g
Dimensions (WxDxH)	483 x 244 x 45 mm