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
•You will start by MUTING all channels except the Sub- Woofer.
•Once you have tested and calibrated the Subwoofer you will
•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.
Click on the box and type in the value
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.
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SDEC
