Operation Manual

EF1210 U
SER
M
ANUAL
58 http://www.aspi.com Copyright © 1999, All Rights Reserved
AEC
N
-
ENABLE
/
DISABLE ACOUSTIC ECHO CANCELLER ON CHANNEL
N
The acoustic echo canceller is the heart of the EF1210, which eliminates echoes and
acoustic feedback that occur when loudspeaker audio is picked up by room micro-
phones. The only instance when you may want to use this command is when you put
the EF1210 into wideband noise cancellation mode, which can only be enabled if the
AEC is disabled on each channel.
The factory default setting for AEC
n
is 1 (on).
Remote Commands
The following commands can be sent by the remote control device to enable or dis-
able acoustic echo cancellation.
EF1210 Messages
The following messages are sent by the EF1210 in response to an AEC
n ? command,
or in response to any AEC command when acknowledgment mode is on.
Example
In the following example, the remote control device disables the AEC on all channels
on the EF1210 with Device ID number 7. Then it enables the AEC on channel 2 and
requests the AEC status on channel 6 of the same EF1210. Acknowledgment mode is
enabled.
Remote Command Effects
AEC
n 0 Turn off AEC on channel n.
n ranges from 1 to 8.
AEC
n 1 Turn on AEC on channel n.
AEC
n 2 Toggle AEC on or off for channel n.
AEC
n ? Request AEC status for channel n.
EF1210 Message Message meaning
AEC
n 0 AEC is currently off on channel n.
AEC
n 1 AEC is currently on on channel n.
Note.
It is possible to use a wildcard (*) for setting AEC
n
to 0 or 1 (turn-
ing on/off), but not for querying or toggling.
Remote Command EF1210 Message
C07AEC*0 C07AEC*0
C07AEC21 C07AEC21
C07AEC6? C07AEC60