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Rane ECS v2 Data Sheet
DATA SHEET
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECB 62 Base
ECM 82 Mixer
General Description
Rane Corporation’s updated Engineered Conference
System (ECS) provides the signal processing functions
required for a state of the art:
• Teleconferencing
• Videoconferencing
• Distance Learning
• Boardroom
• Courtroom
audio system. Functions include a mono or optional
stereo 6 Port audio bridge (or router), up to 48 channels of
automatic mic or line mixing, Multi-Zone Acoustic Echo
Cancellation, video follows audio capability, integration of
audio/video recording and playback equipment, programmable signal processing (EQ, delay, compression, level
control), digital hybrid (in the Rane ECM 64 AD), and
remote diagnostics - all available from a single manufacturer.
ECS is comprised of these two single rack space units:
• ECB 62 Base – 1 required per system (an optional ECS 62
Stereo Expansion card available).
• ECM 82 Mic/Line Mixer – up to 6 Mixers connect to a
Base (optional ECA 1 Acoustic Echo Canceller card
available, one in each ECM 82 Mixer ).
An optional RPD 1 Programming & Diagnostics unit may
be used with a standard modem for remote programming and
diagnostics.
Connecting the Rane ECM 64 and it's optional DH 1
Digital Hybrid provides high quality audio communication to
the remote site through Plain Old Telephone Service (POTS).
Balanced ‘Euroblock’ audio connections are used
throughout. RS-232 connects ECS to any control system.
RaneWare® is software operating under Microsoft
Windows, allowing the units to be controlled in real time. The
software’s graphical interface features control of all parameters and extensive on-line help. RaneWare is included with
ECS, and the latest version is downloadable from Rane’s web
site at www.rane.com.
Powered from UL listed, CE approved remote power
supplies, all ECS components are exempt from safety agency
requirements, and may be used in any installation mandating
agency compliance.
Features
US Patented Features
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Automatic Microphone Mixing, up to 48 Inputs
Selective 6 Port Audio Bridge
Programmable Input and Output Level Controls
ECS 62 Audio Bridge Stereo Expansion Option
RS-232 Control System Connection using Rane’s RW 232
Euroblock Audio Connections
Minimal Rack Space Required
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Multi-Zone Echo Cancelling (MZEC™ )
Adaptive Processing of all Microphone Inputs
Master Mic and Master Port with Delay Timers
Adjustable Near Signal and Program Signal Offsets
Smart Last-On
U.S. Patent 5,848,146 on all Rane ECS products
Windows is a registered trademark of Microsoft Corporation
RaneWare is a registered trademark of Rane Corporation
Data Sheet-1
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECB 62 Base
Features
The ECB 62 is the master controller for the ECM 82
Mixers. There are 6 Ports on the internal audio bridge, with
each Port consisting of a digitally selected 5 Input audio
mixer. This configuration disallows the connection of an
Input to its Output, avoiding possible feedback (except Port
5). Each Port Input also provides for a selective automatic
Level control.
The ECB 62 can accomodate one to six ECM 82 Mixers
(8 channel mic or line mixers) on Port 1. The five other Port
Inputs allow any other line level audio signals. The programmable parameters for the ECS are stored in non-volatile
Memory (no batteries).
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PORT 1 - MIXER INPUTS
MIX 1
MIX 2
MIX BUS
MIX 3
+6 dB
Six port selective audio bridge with stereo expansion capability
Master processor for control, audio monitoring, & communications
System parameters stored in non-volatile memory
Computer-controlled Levels on all audio Inputs & Outputs
Hardware Input Level pads on Ports 2 thru 6
Automatic Level control on all Inputs
Port 1 Expansion Inputs accommodate six ECM 82 Mixers
Port 5 Input to Port 5 Output Capability
Control network communicates with other RW 232 products
Noise generator aids in Mic setup
Mono Output jumpers
Security cover included
OL
MIX 4
INPUT LED
DRIVER
MIX 5
+5V
AUDIO BRIDGE
RIGHT CHANNEL
+5V
Programmable
Input Levels
MIX 6
2
1
10K
PORT 2-R
(CODEC - R)
PORT 1
CTRL.
PORT 2
CTRL.
P1
P3
P4 PORT 2
P5
P6
CTRL.
PORT 3
CTRL.
P1
P2
P4 PORT 3
P5
P6
CTRL.
PORT 4
CTRL.
P1
P2
P3 PORT 4
P5
P6
-6/+4 dB
10 dB
Pad
1
2
3
PORT 3-R
(AUX 1 - R)
10K
-6/+4 dB
10 dB
Pad
1
PORT 5
PORT 4-R
(AUX 2 - R)
10K
10 dB
Pad
PORT 6
1
2
3
10K
PORT 5-R
(VCR - R)
CTRL.
+8 dB
PORT 2-R
(CODEC - R)
+8 dB
PORT 3-R
(AUX 1 - R)
P3 Prog Sig/VU
+8 dB
PORT 4-R
(AUX 2 - R)
+8 dB
PORT 5-R
(VCR - R)
+8 dB
PORT 6-R
(PHONE - R)
CTRL.
CTRL.
-6/+4 dB
1
2
3
10K
P1 Prog Sig/VU
CTRL.
P1
P2
P3 PORT 6
P4
P5 SELECT
10 dB
Pad
PORT 6-R
(PHONE - R)
CTRL.
* P5
P6
CTRL.
-6/+4 dB
PORT 1 MONO
(PROG MONO)
{ECT 1 REF}
+8 dB
P1
P2
P3
P4 PORT 5
2
3
Programmable
Output Levels
P2
P3
P4 PORT 1
P5
P6
10 dB
Pad
3
PORT 1-R
(PROGRAM - R)
+8 dB
SIGNAL
PINK
NOISE
DC AVG
CONVERTERS
MONO
CONNECTION TO ECS 6S JUMPERS
-6/+4 dB
A/D PORTS 1-8
P. NOISE
LEVEL CONTROLS
EXP. DATA
LEVEL
METER
VU PORT
PORT 1
PROG-L
MONO 2-R
MONO 2-L
MONO 3-R
MONO 3-L
MONO 4-R
MONO 4-L
MONO 5-R
MONO 5-L
MONO 6-R
MONO 6-L
RW 232 DATA
PSG
MSG
EXP.
DRIVER
ECS
EXPANSION
MEMORY
ADDRESS
NON-VOLATILE
MEMORY
MASTER PROCESSOR
RJ11
SELECT
LEVEL CTRL
RW 232
IN
OL
OUTPUT LED
DRIVER
RW 232
INTERFACE
1
RW 232
OUT
Data Sheet-2
RW 232 ADDRESS
+5V
SIGNAL
+5V
ECS v2
ENGINEERED CONFERENCE SYSTEMS
Features
ECS 62 Optional Stereo
Expansion Module
The ECS 62 is a plug-in card allowing the ECB 62 to
accommodate stereo audio Inputs.
The ECS 62 installs by temporarily removing the top
cover, and seating the card on top of the motherboard. Front
panel trims are now accessible through a security panel, and
additional connections become available at the rear panel.
Mono jumpers are provided on the Port Outputs for either
mono or stereo sources. This module is designated as the left
channel, while the ECB 62 euroblocks constitute the right
channel.
• Six Port selective audio bridge duplicates the ECB 62’s audio
bridge for full stereo operation
• Hardware Input Level pads
• Computer-controlled Levels on all Inputs & Outputs duplicate
the ECB 62’s Level controls
• Automatic Level controls on all Inputs
• Port 1’s Input provided from the right channel of the ECB 62
• Mono output jumpers
10 dB
Pad
1
2
3
PORT 2-R
(CODEC - R)
10K
-6/+4 dB
+8 dB
AUDIO BRIDGE
LEFT CHANNEL
10 dB
Pad
1
CTRL.
PORT 2
CTRL.
P1
P3
P4 PORT 2
P5
P6
CTRL.
PORT 3
CTRL.
P1
P2
P4 PORT 3
P5
P6
CTRL.
PORT 1
PORT 3-R
(AUX 1 - R)
10K
Programmable
Input Levels
-6/+4 dB
10 dB
Pad
1
2
3
PORT 4-R
(AUX 2 - R)
10K
-6/+4 dB
10 dB
Pad
1
PORT 4
2
3
CTRL.
PORT 5-R
(VCR - R)
10K
-6/+4 dB
PORT 5
10 dB
Pad
CTRL.
1
2
3
PORT 6
PORT 6-R
(PHONE - R)
10K
-6/+4 dB
Programmable
Output Levels
P2
P3
P4 PORT 1
P5
P6
2
3
CTRL.
P1
P2
P3 PORT 6
P4
SELECT
P5
+8 dB
PORT 2-R
(CODEC - R)
+8 dB
PORT 3-R
(AUX 1 - R)
P3 Prog Sig/VU
P1
P2
P3 PORT 4
P5
P6
P1
P2
P3 PORT 5
P4
P5
P6
PORT 1-R
(PROGRAM - R)
+8 dB
PORT 4-R
(AUX 2 - R)
+8 dB
PORT 5-R
(VCR - R)
+8 dB
PORT 6-R
(PHONE - R)
CTRL.
CTRL.
CTRL.
CONNECTION TO ECB 62
PROG-L
PORT 1
MONO 2-L
MONO 2-R
MONO 3-L
MONO 3-R
MONO 4-L
MONO 4-R
MONO 5-L
MONO 5-R
MONO 6-L
MONO 6-R
MONO
JUMPERS
SELECT
LEVEL CTRL
Data Sheet-3
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECM 82 Automatic Mic Mixer
Features
Each Mixer provides a digitally controlled analog 8-Input
automatic mixer with an optional ECA 1 Echo Canceller. The
ECB 62 Base supports up to 6 ECM 82 Mixers allowing up to
48 mic or line level Inputs. The ECM 82 communicates with
the ECB 62 via the Expansion Data connection. Unlike other
automatic mic mixers, each Input is programmable as either a
Last-On or Gated Output. Only Inputs placed in the Last-On
mode may become the Master Channel.
All operating parameters are stored in the Base’s nonvolatile Memory and uploaded to the Mixers on power-up.
The ECM 82 comes with an ECS interface cable, security
cover, and daisy-chain power supply cable.
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(S3-1)
Phantom
OL
+12V
Gain Select
1K
6 40
INPUT LED
DRIVER
56dB
+5V
SIGNAL
+5V
MIC 1
Eight channel Microphone/Line auto-mixer
Eight programmable Input Gates
One programmable Output Gate
Expansion Port for cascaded Mixers
Selectable Post- or Pre-Gate Mixed Output - all Mics, pre-Echo Canceller
Optional ECA 1 Echo Canceller module
Selectable NOMM function (Number Of Mics & Mixers)
Post- and Pre-gate Outputs for each Input
12V Phantom Power selection for each Input
Security Cover included
POST-GATE
OUPUTS
Programmable
Gate Depth
SSM-2017
CW
-14dBu
MIC 1
Mic 1
Level
(S3-2)
Phantom
301
MIC 2
CTRL.
+12V
301
Gain Select
1K
6 40
MIC 3
56dB
301
MIC 2
MIC 4
SSM-2017
CW
301
Mic 2
Level
MIC 5
(S3-3)
Phantom
CTRL.
301
MIC 6
+12V
Gain Select
1K
6 40
301
56dB
MIC 7
301
SSM-2017
MIC 3
MIC 8
CW
Mic 3
Level
(S3-4)
Phantom
301
6 40
56dB
SSM-2017
MIC 4
-10dBu
AUX
OUT
POST-GATE
POST-GATE MIX BUS
PRE-GATE MIX BUS
CTRL.
+12V
Gain Select
1K
MIX
SELECT
PRE-GATE
301
-14dBu
MIX
OUT
INTERNAL
301
CW
Mic 4
Level
(S3-5)
Phantom
Mixer Gate
and
Suppressor
OPTIONAL
ECA 1 MODULE
CTRL.
ECHO CANCELLER
+12V
Gain Select
1K
6 40
TRANSMIT
IN
56dB
TRANSMIT
OUT
RECEIVE
IN
CTRL.
CTRL.
E/C BYPASS
SSM-2017
MIC 5
OL
CW
6 40
56dB
SSM-2017
+5V
POST-GATE MIX BUS
PRE-GATE MIX BUS
+12V
MIC 6
+5V
SIGNAL
CTRL.
Gain Select
1K
OUTPUT LED
DRIVER
Mic 5
Level
(S3-6)
Phantom
CW
PRE-GATE
OUPUTS
-14dBu
Mic 6
Level
(S3-7)
Phantom
MIC 1
CTRL.
301
+12V
Gain Select
1K
6 40
MIC 2
56dB
301
MIC 3
SSM-2017
MIC 7
301
CW
Mic 7
Level
(S3-8)
Phantom
MIC 4
301
CTRL.
MIC 5
+12V
Gain Select
1K
6 40
301
56dB
MIC 6
301
SSM-2017
MIC 8
MIC 7
CW
Mic 8
Level
301
MIC 8
CTRL.
301
MIX IN
10K
E/C REF
-6dB
DC AVG
CONVERTERS
MIC STATUS
47K
A/D PORTS 1-8
ECS
INTERFACE
EXP
IN
EXP
OUT
LEVEL CONTROLS
RJ11
PGS
MCS
EXP.
DRIVER
LED PORT
EXP. DATA
EXP. DATA
ADDRESS
RJ11
1
MIC STATUS
LEDS
DB9-FM
E/C BYPASS
GATE STATUS
MIXER PROCESSOR
ECS ADDRESS
Data Sheet-4
E/C CTRL.
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECA 1 Acoustic Echo Canceller
The ECA 1 Adaptive DSP Acoustic Echo Canceller
module is an option for the ECM 82 Mixer. The ECA 1
installs by temporarily removing the top cover, and seating
the card on top of the mixer mother board. Since the Echo
Canceller automatically adapts, room training is not required.
This is possible through advanced digital signal processing.
The ECA 1 can be bypassed under Base control allowing
the ECS to operate as a standard auto-mixer.
Features
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Adaptive DSP acoustic Echo Canceller
Advanced DSP algorithm models and adapts to the room
Bypass under RW 232 control
Multi-Zone Echo Cancelling (MZEC)
7 kHz bandwidth
250 ms tail length
Multiple ECA 1 Solution
In a typical system using a single Echo Canceller, if more
than three Mics are Gated On at the same time, the acoustic
model may become too complex causing unwanted suppression or return echo. To eliminate this problem, Rane’s
innovative approach allows for an ECA 1 Echo Canceller to
be installed in each ECM 82. This method is called MultiZone Echo Cancelling (MZEC™.)
MIX
SELECT
-10dBu
AUX
OUT
POST-GATE
PRE-GATE
301
-14dBu
MIX
OUT
INTERNAL
301
Mixer Gate
and
Suppressor
OPTIONAL
ECA 1 MODULE
ECHO CANCELLER
TRANSMIT
IN
See Location in ECM 82 Diagram
TRANSMIT
OUT
RECEIVE
IN
CTRL.
CTRL.
E/C BYPASS
OL
OUTPUT LED
DRIVER
+5V
SIGNAL
+5V
Rear Panel Details
ECB 62 Base with ECS 62 Stereo Option
ECM 82 Mixer
Data Sheet-5
ECS Architectural Specifications
The programmable conference audio system shall provide:
• A programmable audio bridge that allows for the selecting and
bridging of up to six full duplex audio devices.
• The ability to receive and send mono or stereo audio signals, as
required.
• Programmable automatic mixing of up to 48 microphones or line
level inputs, as required.
• Up to six zones of acoustical echo cancelling with tail lengths of
up to 250 milliseconds, as required.
• Remote diagnostics with password protection, as required.
Base - The audio bridge shall be computer controlled. Each
section of the bridge is called a port and shall have a bandwidth of
20 Hz to 20 kHz. One of the ports shall be designated as the Room
port and its input shall allow for the connection of up to six
automatic microphone or line level mixers. The output of the Room
port shall be designated as the Program audio source. All audio
inputs, except for the Room port, shall allow for the connection of
both stereo or mono audio sources and shall be an active balanced
design with an input impedance of 10k ohms. All audio outputs
shall supply either a mono or a stereo audio source and shall have an
active cross-coupled balanced design. All audio connections shall be
made using Euroblocks and have internal RFI filters.
All audio inputs and outputs of the bridge shall have programmable attenuators with 100 dB of attenuation. All audio inputs shall
have selectable automatic level controls. A selectable noise source
on the Program output shall be provided for alignment of the
microphone gains.
Front panel LEDs shall indicate communication status, signal
presence, overload, operational status and port audio level VU
Meter. A port step button shall be provided to select the monitored
port for the VU Meter.
The unit shall be controlled via RW 232. A device address
switch, and RS-232 input and output jacks shall be provided. To
communicate to the automatic mixers an Expansion Data Port shall
be provided.
The programmable audio bridge shall be a Rane Corporation
ECB 62 and ECS 62 Stereo Expansion Module, as required.
Mixer - The programmable audio mixer shall operate as an 8
channel manual or automatic mixer. Each channel of the mixer shall
operate in either a Last On or Gated mode. When operated in a Last
On mode, the mixer shall provide a means to hold the most recent
active channel on. The held channel shall be called the Master Mic.
When operated in a Gated mode, the mixer shall provide automatic
attenuation to inactive channels and maximum gain to active
channels. Detection of an active channel shall be processed by a
dynamic threshold, where the threshold level must change due to the
room’s noise level, if another channel is active and if audio is
detected at the room’s loudspeakers. The Mixer’s channels must not
become active due to audio from the room’s loudspeakers. A
selectable NOM function shall be applied to the active channel
level. The active Master Mic channel shall maintain a maximum
level for teleconferencing.
Each mixer shall provide for the inclusion of an acoustical echo
canceller and a programmable means to bypass it. The echo
canceller shall be continually adaptive and not require training. Each
mixer shall provide an input for the Echo Canceller Reference. Each
mixer shall allow for a method or removing echo caused by the
readapting of the echo canceller after a new channel becomes active
and audio is detected at the room’s loudspeakers. Each mixer shall
allow for a programmable method to limit the maximum number of
channels that can gate on at the same time.
Each mixer shall provide unbalanced outputs for Pre-Gate and
Post-Gate on each channel, an unbalanced Aux output that is a
selectable Post-Gate or Pre-Gate mix of all of the channels and a
Mix output that is a program selectable Post-Echo Canceller or PreEcho Canceller unbalanced output.
To communicate to the other automatic mixers and the ECB 62
a proprietary interface shall be provided, called the Expansion Data
Port.
The programmable audio mixer shall be a Rane Corporation
ECM 82 and ECA 1Echo Canceller Module, as required.
Each device shall have certified compliance with FCC Part 15
for a Class B digital device, and EMCD 89/336/EEC. Each device
shall be powered from a remote power supply and shall be UL
listed, CSA certified and meet LVD 73/23/EEC & EMCD 89/336/
EEC standards.
Each device shall be constructed entirely from cold-rolled steel
and be contained in a standard E.I.A. 19” 1U rack unit.
ECS 62 Specifications
Parameter
Frequency Response
Ports 2-6 Input Impedance
Input Pad
Input Attenuation
Maximum Input Level
Minimum Input Level
All Ports - Output Type
THD
CMRR
Signal-To-Noise
Signal-To-Noise
Crosstalk
Output Attenuation
Shipping: Size
..........Weight
Specification
20 Hz to 20 kHz
10k
Switchable 0/-10
0-100
+20
-14
Active Balanced
0.01
>40
>80
>95
>70
0-100
4.5" x 12" x 14"
4 lb
All Ports - Output Level @ 0 dB on Meter = 0 dBu (Max output level)
Data Sheet-6
Limit
±1 dB
Units
Conditions/Comments
ohms
dB
dB
dBu
dBu
Active balanced
Programmable
Cross-coupled
max
%
dB
dB
dB
dB
dB
@ 1 kHz
@ 0 dBu ref, all on
@ 0 dBu ref, all off
@ 1 kHz
Programmable
(11.5 cm x 30.5 cm x 35.5 cm)
(1.8 kg)
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECB 62 Specifications
Parameter
Frequency Response
Port 1 Input Impedance
Port 1 Nominal Input Level
Ports 2-6 Input Impedance
Input Pad
Input Attenuation
Maximum Input Level
Minimum Input Level
Port 1 Mono Output Type
Port 1 Mono Output Level
All Ports - Output Type
Total Harmonic Distortion
CMRR
Signal-To-Noise
Signal-To-Noise
Crosstalk
Output Attenuation
Automatic Level Control
Limiter
Overload Indicator Thresholds
Signal Present Thresholds
Unit: Agency Listing
..........120 VAC Model
..........230 VAC Model
Power Supply: Agency Listing
..........120 VAC Model
..........230 VAC Model
Power Supply: Input
..........Output
Unit: Construction
..........Size
..........Weight
Shipping: Size
..........Weight
Specification
20 Hz to 20 kHz
10k
-14
10k
Switchable 0/-10
0-100
+20
-14
Unbalanced
0
Active Balanced
0.01
>40
>80
>95
>70
0-100
Attack Time=1
Release Time=1
Attack Time=10
Release Time=50
20
-28
Limit
±1 dB
Units
Conditions/Comments
ohms
dBu
ohms
dB
dB
dBu
dBu
Unbalanced
Active balanced
Programmable
300 ohms
dBu
max
3
2
5
%
dB
dB
dB
dB
dB
sec
sec
ms
ms
dBu
dBu
Cross-coupled
+4 dBu, 20-20 kHz
@ 1 kHz
@ 0 dBu ref, all on
@ 0 dBu ref, all off
@ 1 kHz
Programmable
Input and Output Levels
Input Level
Class 2 Equipment
UL / CSA
Certified FCC part 15J
CE-EMC
CE-Safety
National Electrical Code
Exempt Class 2 equipment
Class B Device
EMC Directive 89/336/EEC
Exempt Art. 1 of LVD 73/23/EEC
UL
CSA
CE-EMC
CE-Safety
95-250 VAC
+5 VDC, 5.0 A
-12 VDC, 1.5 A
+12 VDC, 0.8 A
Return
All Steel
1.75" H x 19" W x 8.5" D (1U)
6 lb (w/o power supply)
4.5" x 20.3" x 13.75"
11 lb
File no. E137895
File no. LR53696-75
EMC Directive 89/336/EEC
LV Directive 73/23/EEC
IEC line cord jack
Pin 3
Pin 4
Pin 5
Pins 1 & 2
All Ports: output level @ 0 dB on meter = 0 dBu (max output level)
Note: 0 dBu=0.775 Vrms
(4.4 cm x 48.3 cm x 21.6 cm)
(2.7 kg)
(11.5 cm x 52 cm x 35 cm)
(5.0 kg)
*Level Controls Set at “0”
Data Sheet-7
ECS v2
ENGINEERED CONFERENCE SYSTEMS
ECM 82 Specifications
Parameter
Frequency Response
Input Impedance
Specification
±1
1k
Limit
Units
dB
ohms
Conditions/Comments
20 Hz to 20 kHz
Active balanced
THD
< 0.1
%
Signal-To-Noise
Maximum Gain
CMRR
>80
70
>60
dB
dB
dB
Min and Max Input Levels
6 dB (-20 to +10)
40 dB (-54 to -23)
dBu
dBu
Gate Attenuation
56 dB (-70 to -36)
0 to -100
dBu
dB
Attack time
Master and Release Timer
Phantom Power
<10
.05 to 3
12 V @ 10 ma
ms
sec
Mix Input
E/C REF Input
Unbalanced 10k
Unbalanced 47.5k
ohms
ohms
-14 dBu
-10 to 0 dBu
Pre- & Post-Gate, Mix Outputs Unbalanced 300
Aux Output
Unbalanced 300
ohms
ohms
-14 dBu Nominal @ 1 kHz
-10 dBu Nominal @ 1 kHz
Automatic Adaptation Rate
Unit: Agency Listing
<5
Same as ECB 62
sec
During quiet operation
Power Supply
Unit: Construction
..........Size
Same as ECB 62
All Steel
1.75" H x 19" W x 8.5" D (1U)
(4.4 cm x 48.3 cm x 21.6 cm)
..........Weight
Shipping: Size
6 lb (w/o power supply)
4.5" x 20.3" x 13.75"
(2.7 kg)
(11.5 cm x 52 cm x 35 cm)
..........Weight
11 lb
(5.0 kg)
@ 0 dBu ref
@ 1 kHz
Selectable per Input
All Ports: output level @ 0 dB on meter = 0 dBu (max output level)
Note: 0 dBu=0.775 Vrms
ECA 1 Specifications
Parameter
Specification
DSP Adaptive Acoustic Echo Canceller
Frequency Response
..........3.5 kHz operation
125 to 3625
..........7 kHz operation
125 to 7125
Audio Processing Delay
<50
Tail Length
Up to 250
Total Echo Cancellation
Up to 60
Adaptive Echo Cancellation
45
Shipping: Size
4.5" x 12" x 14"
..........Weight
4 lb
Data Sheet-8
Limit
Units
Hz
Hz
ms
ms
dB
dB
Conditions/Comments
Local to Remote Output
Receive State only
11.5 cm x 30.5 cm x 35.5 cm
1.8 kg
ECS v2
ENGINEERED CONFERENCE SYSTEMS
Typical Video Conference Room
Example System
The following is an ECS example application to assist
designers in understanding some of the capabilities and utility
of ECS. This example provides a starting point for those who
are working on similar applications. This page includes a
short description, followed by descriptions regarding potential
Memory setups. The following pages show the system block
diagram, the system wiring diagram, and RaneWare screens.
The audio system block diagram using ECS for a typical
teleconferencing room is shown on the next page. This
example includes:
· 8 microphones (hooked to one ECM 82A, which includes
the ECA 1 Acoustic Echo Canceller.)
· Room controller (AMX or Crestron)
· Remote Diagnostics (RPD 1 and an external off-the-shelf
modem.)
· Distributed room speakers for program audio (with your
favorite speakers and amp)
· 4 audio sources:
1) Audio from a Video Codec
2) VCR 1 audio
3) VCR 2 audio
4) Phone add-on audio (ECM 64 with DH 1 if
needed)
In this example, the room has two basic uses. One use is
for conferencing (with video if needed) and a second use for
audio-only conferencing using the phone add-on (POTS). Six
different ECS Memories are discussed below, each allowing
variations for the room’s multiple uses. Of course, up to 16
different Memories are supported by ECS, all of which may
be accessed via RS-232 communications. Indeed, even the 6
Memories discussed below may not cover all possible needs,
they are considered here solely to initiate and inspire the
multitude of possibilities.
MEMORY 1: Room Controller Operation
When Memory 1 is selected, the Room Controller can be
used to enable and disable all audio sources and destinations.
Use Memory 1 to allow the user to control the entire system.
One may want to setup Memory 1’s default settings to disable
all audio devices. Thus, from the Room Controller, the user
must enable Ports on the ECB 62 Base before audio is heard
in the room. Also, until microphone audio on Port 1 is
enabled by the user, no audio is heard at the far end. Since the
Room Controller cannot easily query for the current ECS
system settings, the Room Controller and ECS units must
default to the same settings. Therefore, when designing an
ECS system with a room controller, both ECS and the room
controller must start with the same settings.
MEMORY 2: Conference via POTS
Memory 2 enables conferencing using the ECM 64 with
the DH 1 Digital Hybrid. This Memory connects the room
audio (the Base’s Port 1) to the Digital Hybrid (Port 6), thus
sending room audio picked up by the Mics to the far end. At
the same time, this Memory connects audio being sent from
the far end (Port 6’s Input) to the local room speakers (Port
1’s Output).
MEMORY 3: Conference via Video Codec
Memory 3 connects the room audio (Port 1) to the Video
Codec (Port 2). This allows a conference via the Video
Codec, instead of via the Digital Hybrid as in Memory 2.
Video signals are not handled by ECS, therefore it is immaterial to ECS whether video signals are being exchanged, thus
creating a videoconference.
MEMORY 4: Conference with VCR 1 audio
Memory 4 connects VCR 1 audio (Port 4) to the room
speakers for local reinforcement or playback. Additionally,
VCR 1 audio connects to the Video Codec thus sending VCR
1 audio to the far end (via Port 2). ECS does not accept video
signals, therefore, the VCR 1 video feeds and switching for
Memory 4 must be accomplished elsewhere.
MEMORY 5: Multi-way Conference or Phone add-on
Memory 5 allows a multi-way conference where the
room audio (Port 1) connects to the Video Codec (Port 2) and
to the Digital Hybrid (Port 6). This allows a 3-way conference via the Video Codec, the Digital Hybrid (POTS) and the
local room.
MEMORY 16: System Setup
Memory 16 can be used to set Mic and Port gains during
sound system optimization. For optimization, one might want
to disable Limiters and automatic Level controls which are
available on many ECS Inputs or Outputs. The other Memories could enable such processing as required.
These are just a few sample Memory setups. Up to 16 are
possible. The flexibility of the Base’s Ports acting as an audio
bridge should now be apparent. Since the Base also communicates to the Mixer, one can also disable and enable various
combinations of Mics when their use is not necessary in
certain Memories or setups. Even the audio level of each
source can be modified using various Memories. The Room
Controller can also control individual audio source levels,
thus giving the user more control — or is that an oxymoron
like saying military efficiency?
The optional ECS 62 card renders the Base a stereo device
allowing stereo reinforcement when needed. And since the
Base supports up to six 8-channel ECM 82 Mixers - each
with its own Echo Canceller - up to 48 Mic Inputs are
supported.
Data Sheet-9
ECS v2
ENGINEERED CONFERENCE SYSTEMS
Example Conference System Block Diagram
Data Sheet-10
ECS v2
ENGINEERED CONFERENCE SYSTEMS
Example Conference System Wiring Diagram
Data Sheet-11
ECS v2
ENGINEERED CONFERENCE SYSTEMS
RaneWare
Screens for
Example System
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (425)355-6000 FAX (425)347-7757 WEB http://www.rane.com
Data Sheet-12
All features & specifications subject to change without notice. DOC 103074 PN 10678 5-00
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