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INTRODUCTION
© Polycom, Inc. 3 VORTEX EF2280 Reference Manual
improves the sound quality of an automixer, for example, by preventing it from bring-
ing the noise level up and down when microphones are gated on and off. By cancel-
ling the noise picked up by each microphone, the overall signal to noise ratio (SNR) is
preserved. The result is crystal clear speech over a greater decibel range than any
other echo canceller. That means reduced listener fatigue and a higher quality audio
conference.
Warranty
Registration
Please take a moment to fill out and return your warranty registration card. This
information will help us to provide you with better customer support and will allow us
to notify you with updated product features and software.
PRODUCT FEATURES
Product Front panel LCD for controlling and configuring the product without a computer
5-band equalizer on all Inputs and Outputs (Parametric, High/Low Pass, High/
Low Shelf)
Echo cancellation on Inputs 1-8
Noise cancellation up to 15 dB
Two internal automatic microphone mixers for Inputs 1-8
25 x 18 full cross point matrix mixer with expansion bus
Internal signal generator for calibration mode and noise masking applications
2 year warranty
AEC 24 bit resolution
48 kHz sampling rate, >20 kHz bandwidth
270 ms AEC tail length
40 dB/sec convergence rate
Can function in rooms with more than 10 dB of room gain
Inputs and Outputs 8 microphone/line level inputs with phantom power on each input
24 VDC Phantom Power
4 line level auxiliary inputs with nominal level of 0 dBu
12 digitally controlled analog trimpots for the 12 input signals
12 line level outputs with default nominal level of 0 dBu
Automatic Gain Control (AGC) on Inputs 1-8.
Phoenix connectors for audio input and output
Remote Control RS-232 port for remote control
Reconfigurable parallel logic input/output
ASPI bus for controlling multiple EF devices from a single controller
EF bus for linking multiple EF2280s.
Digital bus with 4 audio busses, 48 kHz sampling rate
Up to 8 devices can be linked, each device providing 4 audio signals on the bus
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