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Vortex EF2280
Reference Manual
VORTEX EF2280 REFERENCE MANUAL
Polycom, Inc., Copyright 2001 Technical Support: 800.932.2774 1
Introduction....................................................................................................2
Product Features .................................................................................................... 3
Pre-Installation...............................................................................................4
EF2280 Front and Rear Panels.............................................................................. 5
Installation .....................................................................................................7
Mounting the EF2280 ............................................................................................. 7
Connecting the EF2280 to Other Equipment ......................................................... 7
Device IDs on the EF Bus....................................................................................... 9
Connecting Multiple EF2280s................................................................................ 9
Factory Default Settings (Preset 0) ........................................................................ 11
Check Surrounding Equipment............................................................................... 13
Integrating the EF2280 Into Your System.....................................................15
Input Settings .......................................................................................................... 15
Calibration.............................................................................................................. 15
Build Your Echo Canceller Reference.................................................................... 17
Echo Canceller Reference for Multiple EF2280s................................................... 18
Configure the Automatic Microphone Mixer.......................................................... 20
Automixer Settings for Multiple EF2280s .............................................................. 22
Configure the Matrix Mixer.................................................................................... 23
Building Your System with Multiple EF2280s........................................................ 23
Presets..................................................................................................................... 25
Other EF2280 Features.......................................................................................... 25
LCD Menu Structure .....................................................................................26
System Menu ........................................................................................................... 29
Inputs ...................................................................................................................... 30
Outputs.................................................................................................................... 31
Automixer Menu...................................................................................................... 32
Matrix Menu ........................................................................................................... 34
Parametric EQ Menu.............................................................................................. 35
Troubleshooting .............................................................................................36
Automatic Microphone Mixer................................................................................. 36
Matrix Mixer........................................................................................................... 37
Echo Canceller Reference ...................................................................................... 37
Residual Echo ......................................................................................................... 37
Contacting Technical Support ................................................................................ 42
Technical Specifications ................................................................................43
Compliance............................................................................................................. 43
Conference System Design............................................................................46
EF2280 Block Diagram .................................................................................47
Connector Pinouts..........................................................................................48
Connecting Unbalanced RCA to Balanced Mini Phoenix...................................... 50
Making an EF Bus Terminator............................................................................... 50
Additional Notes ..................................................................................................... 51
Warranty Information ....................................................................................52
Definition of Terms .......................................................................................54
Index ..............................................................................................................57
INTRODUCTION
VORTEX EF2280 Reference Manual 2 Technical Support: 800.932.2774
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 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.
About the EF2280 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
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
PRE-INSTALLATION
VORTEX EF2280 Reference Manual 4 Technical Support: 800.932.2774
P
RE
-I
NSTALLATION
What’s Included The Vortex EF2280 product package includes the following items:
Vortex EF2280 Reference Manual
Vortex EF2280
External power supply
Cat 5 cable for EF Bus or ASPI Bus
EF Bus terminator
Rack mount screws (4)
Phoenix connectors (24)
Cable clamp and screw
CDROM containing other manuals and Conference Composer software
Warranty Registration Card
What’s Not Included The following equipment is not included with the EF2280 product package, but may
be necessary to create a completely functional system:
Microphones
Loudspeakers
Audio amplifier (or amplified loudspeaker)
EF200 Phone Add
Audio cables
Videoconferencing codec or other four-wire interface (optional)
RS-232 remote control device (optional)
Tools Needed for
Installation
Screwdriver to mount the EF2280 in your rack.
Phoenix connector screwdriver
Figure 1. What’s Included with your Vortex EF2280.
Phoenix
Connectors (24)
EF Bus
Terminator
x
x
x
x
Vortex
®
EF2280
Rackmount
Screws (4)
Cable Clamp
and screw
CDROM with
control software and manuals
External
Power Supply
1-Cat 5 cable (6 inches)
for EF
Bus
or ASPI Bus
Vortex EF2280 Reference Manual
Vortex
®
EF2280
Reference Manual
PRE-INSTALLATION
© Polycom, Inc. 5 VORTEX EF2280 Reference Manual
EF2280 F
RONT
AND
R
EAR
P
ANELS
1. LCD DISPLAY. Displays menu instructions for configuration and operation of
the EF2280.
2. D
OWN BUTTON. Scrolls backward through menu items at a particular level or
decreases the value of a parameter.
3. U
P BUTTON. Scrolls forward through menu items at a particular level or increases
the value of a parameter.
4. E
NTER. Enters the menu and allows you to select and change parameter values.
5. E
SC. Returns to the next highest level of menus.
6. H
OME. Returns to the top of the menu structure.
7. L
EVEL INDICATOR. Indicates the level of the selected channel or parameter.
8. C
HANNEL ACTIVITY LEDS. Indicates gating activity of the 8 mic/line channel
inputs.
Figure 2. EF2280 Front and Rear Panels
134 5 7
10 1211 15 16 17 18 19
2 86
9 1413
PRE-INSTALLATION
VORTEX EF2280 Reference Manual 6 Technical Support: 800.932.2774
9. INPUT PARALLEL PORT. Parallel logic input.
10. O
UTPUT PARALLEL PORT. Parallel logic output.
11. EF B
US IN. Connects to EF BUS OUT of another EF2280.
12. EF B
US OUT. Connects to the EF BUS IN of another EF2280.
13. RS-232 S
ERIAL PORT. Connect this to an optional RS-232 remote control device,
such as a touch panel or personal computer COM port.
14. ASPI B
US. Connects to the ASPI Bus of another EF device (an EF1210 or an
EF200) to be used for RS-232 control from a single control device.
15. P
OWER SUPPLY INPUT. Connects to the external power supply provided with the
EF2280.
16. M
IC/LINE INPUTS. Connects to microphone at either mic or line level, with or
without phantom power.
17. L
INE INPUTS. Inputs A-D at line level.
18. L
INE OUTPUTS. Outputs 1-8 at line level.
19. L
INE OUTPUTS. Outputs A-D at line level.
Figure 3. Parallel remote control, EF BUS, serial remote control, ASPI BUS OUT,
and power supply input on back panel of the EF2280.
10 1211 159 1413
Figure 4. Inputs and outputs on back panel of the EF2280.
19181716
INSTALLATION
© Polycom, Inc. 7 VORTEX EF2280 Reference Manual
I
NSTALLATION
M
OUNTING
THE
EF2280
The EF2280 can be mounted in a rack enclosure using four large screws (10-32x1/2”)
included with the unit. One EF2280 fits in a single rack space.
Recommendation
For Easy Access
While not required, leave a single rack space in between the EF2280 and other units
in your rack. This gives you easier access to the back panel. If you cannot leave a
single rack space, mount the EF2280 below units that are longer in length so that you
can access the Phoenix connectors on the back panel more easily.
Instructions for
Securing Power
Supply to Back of
EF2280
Locate the cable clamp on the back panel of the EF2280 above the RS-232 port.
Remove the screw and thread the power cord through the cable clamp.
Attach the cable clamp to the back panel of the EF2280 and tighten the screw.
Align the clamp so that the power cable does not interfere with the connectors on
the EF2280 back panel.
Plug in the power supply.
We recommend that you also Ty-wrap the power supply to the rack. The purpose
of securing the power supply to the back panel is so that if the power supply were
to drop, it would pull where the cord is attached with the cable clamp and not pull
the plug out of the EF2280.
C
ONNECTING
THE
EF2280
TO
O
THER
E
QUIPMENT
Grounding The EF2280 has 8 mic/line inputs plus 4 line level inputs and 12 line level outputs.
Each input/output is “Pin 1 compatible” — this means that the ground pin of each
input/output is tied to chassis ground. Chassis ground is connected to the input power
ground.
Typical EF2280
Connections
The EF2280 will typically be connected to other equipment in a single room setup as
shown below in Figure 5 and Figure 6.
Caution! Do not use any other power supply other than the one pro-
vided with this unit.
INSTALLATION
VORTEX EF2280 Reference Manual 8 Technical Support: 800.932.2774
Figure 5. Block diagram of typical EF2280 connections: a single room using one EF2280.
Figure 6. Typical EF2280 connections.
Vortex
®
EF2280
In 1
In 2
In 3
In 4
In 5
In 6
In 7
In 8
Out 1
Out 2
Out 3
Out 4
Out 5
Out 6
Out 7
Out 8
In A
In B
Out A
Out B
In D
Out C
Out D
In C
EF200
From AEC
From Rem.
To AEC
To Rem.
Phone
Video
CODEC
Line In Line Out
PSTN
. . .
8 microphones
TO PHONE
TO LINE
ASPI BUS
OUT
ASPI BUS
IN
LOGIC IN/OUT
RESERVED (SET TO OFF)
R
ESERVED (SET TO OFF)
N
OISE SUPPRESSION
DEVICE ID 4
D
EVICE ID 3
D
EVICE ID 2
D
EVICE ID 1
D
EVICE ID 0
FROM
AEC
TO
AEC
FROM
REMOTE
TO
REMOTE
EF400
INTERFACE
AGC
E
PROM OVERR IDE
O
N
O
FF
REMOTE CONTROL
RS- 232
5, 15 VDC
PSTN
EF200 Phone Add (Optional)
ASPI Bus Connection for RS-232 Control
Reference Input
Polycom Video Codec
4-wire Connection
Room Amplifier
Vortex
®
EF2280
Audio
Amplifier
POLYCOM CODEC
TX RX
Polycom, Inc.
Installed Voice Business Group
1720 Peachtree Street NW, Suite 220
Atlanta, GA 30309-2439
Phone: (800) 932-2774, (404) 892-3200
Fax: (404) 892-2512
www.polycom.com
Technical Support:
(800) 932-2774
vortex@polycom.com
Polycom
®
, Vortex
®
, and the Polycom logo are registered trademarks of Polycom, Inc. in the United States and vari-
ous countries. Copyright © 2002 Polycom, Inc. All rights reserved.
1725-80012-001 Rev B
*1725-80012-001-B*
62

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