AUTO EQUALISATION - THE DN3600/DN60 CONNECTION
The DN3600 can be interfaced with the Klark Teknik model DN60 Real Time Spectrum Analyser. The combination can then be used to perform an Automatic Equalisation function, to compensate for the sound system frequency response. To do this, proceed as follows:
1.Make certain that both units are switched OFF. Connect the DN60 to the DN3600. The interconnection is made using the
2.Feed the signal from the DN60 pink noise source through a level control device, such as a mixing console, into the DN3600 input - whichever channel is to be equalised. Keep the pink noise level down at this point. Make certain that any other equalisation in the pink noise signal path, such as on a mixing console input channel, is set to a flat position.
3.Set the DN60 microphone at the desired listening/measurement position in the venue.
4.Slowly bring up the level of the pink noise through the sound system to an average listening level.
5.Set the DN60 controls to Avg., Cont., Resp 3., 1 dB resolution, mic input. Adjust the DN60 Reference Level until the full frequency response display is seen.
5.Switch the More EQ section OUT (More EQ, In/Out, Exit if required).
6.Enter the DN3600 Auto/Q menu (Utilities, Auto/Q). Repeatedly press the Auto EQ button allowing sufficient time between presses for the DN60 display to settle. Continue until a flat response is obtained on the DN60 display. Six to eight iterations are usually enough. It may be necessary to adjust the DN60 Reference Level between iterations.
What happens is this. On each iteration the DN3600 obtains the measured room response from the DN60, calculates the room response correction, limits it to
Note. The DN3600 should not be in bypass mode. If it is the room correction curve will still be added to the DN3600 settings but the measured response will not be affected and the Auto EQ function will not perform as specified.
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