HW Manual-10
Warning:
Proper static discharge measures must be
followed when installing or configuring this card.
Figure 11. ECA 2 Installation with ECM 82e Phantom Power and network termination jumper locations
Figure 10. ECA 2 Block Diagram (detail from Data Sheet Block Diagram).
ECA 2 ECHO CANCELLER MODULE
DESCRIPTION
The ECA 2 is a continually adaptive Acoustic Echo
Canceller module for the ECM 82e Mixer using the Rane
QuickAdapt™ algorithm. The ECM 82eA Mixer is shipped
with the ECA 2 installed. The QuickAdapt algorithm allows a
single AEC to operate the entire system. This algorithm uses
the Rane exclusive Smart Last On™ feature to precondition
the AEC for a microphone gate change. This feature can be
disabled by setting a Mic Gate Depth to 0 dB on the ECM
82eA. If you want to maintain the QuickAdapt algorithm, but
you also want to keep a microphone opened, set the Mic Gate
Depth to -1 dB. Another QuickAdapt feature is to precondi-
tion the AEC for a microphone mute condition. This allows
standard Push-To-Talk microphones to be used. When using
the single AEC method, daisy-chain the Mixers by connecting
MIX OUT to MIX IN on the with the last connection before
the ECB 62e being the ECM 82eA. Only the ECM 82eA
requires its AEC Reference input to be connected.
Multiple ECM 82eA mixers can also be used in situations
where areas in the room are different. For example, table
microphones may only require soft suppression, while ceiling
microphones may require moderate or strong suppression.
This method of echo cancelling is called MZEC™ MultiZone
Echo Cancelling. When using multiple ECM 82eA mixers,
connect the MIX OUT of each mixer to its respective MIX #
input on the ECB 62e.
Since the Echo Canceller automatically adapts to the
room, training is not required.
To upgrade an ECM 82e to an ECM 82eA install the
ECA 2 by temporarily removing the top cover of the
ECM 82e and seating the module onto factory installed
standoffs on the motherboard. After installing the Echo
Canceller, disable Echo Canceller Bypass in RaneWare (see
the RaneWare Operators Manual).
AUX
ECHO CANCELLER
ECA 2 MODULE
TRANSMIT
IN
TRANSMIT
CTRL.
MIX
SIG/OL
DETECTOR
SIG
OL
E/C BYPASS
POST-GATE MIX
OUT
OUT
OPTIONAL
IN
OUT
RECEIVE
Σ
301
301
-10dBu
-14dBu
Σ
+4dB
OUTPUT
POST-GATE
PRE-GATE