JBL SDEC-4000 - Manual (Page 19)

- 19 - SDEC -X000 DACS Calibration Manual v1.0.doc
10 DACS Measurement System
10.1 DACS Hardware Setup
Unpack the DACS Kit and setup the microphone array. Make
all standard connections except for connecting to the SDEC.
Use the below diagram as a guide.
Note: Please refer to the DACS manual that comes
with the DACS Kit for detailed instructions.
Figure 18.
10.2 Channel Test and System
Calibration
Use the DACS to test the channels one at a time, to make
suggestions for filter settings. When using the DACS computer
the basic workflow is as follows:
Make sure you have set the processor to Dolby Pro Logic
and the volume is at 0dB.
•
In the DACS computer you will press F2 (TEST) to test
and check level
• Press F4 (AUTO EQ) to test and allow the DACS to
suggest EQ settings
• When each channel is done you can press F5 (NEXT) to
go to the next channel to test
•
Use the London Architect software to mute the channels
you are not working on and to input EQ filter settings.
• When testing the rear channels you will use the “Ambient
L or Ambient R” channels in the DACS. These channels
will be used for both the SIDES and REARS. Simply mute
the unused channel from within the London Architect
Software. It is best to test the Left Side and then the Right
Side before testing the Left Rear and Right Rear channels.
Use the System Control to select channels and use the matrix
to mute the channel “on” and “off”, don't forget to “un-mute” all
at the end.
•
You will start by MUTING all channels except the Sub-
Woofer.
• Once you have tested and calibrated the Subwoofer you
will un-mute only the channel you are working PLUS the
subwoofer.
• Test the Side and Rear speakers with the Subwoofer
Muted.
Test each channel using the DACS calibration kit and copy EQ
filter suggestions from DACS to London Architect. It will be
necessary to test each channel using the DACS. If you use F4
the DACS will test and suggest filters to use. Copy these filters
for each channel.
Note: The DACS may suggest more filters than you have
available. In this case you will need to decide what filters
are necessary and audible. In general the filters than
suggest under 1db of change can be ignored.
Figure 19.
As you copy the filter EQ setting from the DACS to the London
Architect you will see the resulting EQ curve. If you are using
the web interface (Java Remote) you will not see the EQ curve
display. This is normal.
Click on the
box and type
in the value