AUTO EQUALISATION - THE DN3600/DN6000 CONNECTION
The DN3600 can be interfaced to the Klark Teknik model DN6000 Audio Analyser or DN60 Real
Time Spectrum Analyser. The combination can then be used to perform an Automatic Equalisation
function to compensate for the room or system frequency response. To do this with the DN6000 proceed as follows:
1.Connect the DN6000 to the DN3600. The interconnection is made using the
2.Set up the DN6000 in Frequency mode.
Set the output utility to unfiltered pink noise. Switch weighting to Flat.
Switch off Peak Hold. Set Scale to 60dB.
Set resptime to 1 second or more.
3.Feed the signal from the DN6000 output into the DN3600 input - whichever channel is to be equalised.
4.Set the DN6000 microphone at the desired listening/measurement position.
5.Switch the More EQ section OUT (More EQ, In/Out, Exit if required).
6.Make sure that the DN6000 is not muted and is running.
7.Adjust the Level and Level Trim controls of the DN6000 so that the spectrum analysis is displayed as much as possible in the upper half of the LCD.
8.Enter the DN3600 Auto/Q menu (press 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 DN6000 display. Six to eight iterations are usually enough. It may be necessary to adjust the DN6000 Level Trim control between presses.
What happens is this. On each iteration the DN3600 obtains the measured room response from the DN6000, calculates the room response correction, limits it to +/- 4dB and adds this to the current Graphic settings. With each iteration the measured response gets closer and closer to flat until finally all the DN3600 is doing is to correct minor random variations.
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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