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C
ALIBRATING
THE
EF1210
WITH
EFP
ANEL
C
ONTROL
S
OFTWARE
ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 A-11
the volume controls on the room audio amplifiers and note that this is the
absolute maximum amplification that may be applied to room audio. This
maximum amplification will be referred to in this manual as the amplifier
acoustic gain limit.
During normal operation, the zone output levels will be set 6 dB lower than the
selected level (amplifier acoustic gain limit) to allow the EFPanel Zone Volume
Adjust to apply a volume adjustment to the room audio signal in the range +6 dB to -
12 dB.
iv. Once the Zone Output channels and room audio amplifier have been calibrated,
click on the Next button at the bottom of the page to begin the AEC Reference
Input calibration
C
ALIBRATION
S
TEP
3: C
ALIBRATING
AEC R
EFERENCE
I
NPUTS
For Calibration Step 3, the S
TEP
I
NDICATOR
will lit in the third position.
Note.
The volume control may be set at a lower level than this marked
position (amplifier acoustic gain limit), but must not be set higher
or the performance of the echo canceller will be suboptimal.
Note.
If you are configuring the EF1210 for operation with one AEC ref-
erence input, you will calibrate the AEC A signal.
If you are configuring the EF1210 for operation with two AEC ref-
erence inputs, you will calibrate both the AEC A and the AEC B
signals.
103


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