System set up procedure equalizing a system I&O Manual 06.12.2004 DCN SA IO Eq

Equalizing a System Equaliser function To produce optimum speech intelligibility for a particular discussion room or conference hall the CCU includes a built- in system audio equalisation facility. This facility automatically sets the overall audio characteristics of the DCN unit loudspeakers. NOTE: Channels 12 (line- output) and channel 13 (delegate/ loudspeakers) only will be equalised. To Equalise the system proceed as follows: NOTE: Before carrying out the equalisation process, it is recommended that the surrounding area be kept as quiet as possible. The number of microphones which can be selected for the ‘auto- equalisation’ measurement process can be selected by the user. Proceed as follows: Press the equalising recess switch(3) ‘Start’ located on the front of the CCU to enter the microphone selection mode (refer to page 4- 1). Entry into this mode is indicated by an illuminated busy LED. The chairmans microphone will automatically be selected for the auto equalisation procedure, however, the user can select up to 8 microphones to gain better performance. To select additional microphones simply press the ON/ OFF button of the relevant microphone. If a chairman unit is not connected to the system, a delegates microphone will be switched on. 06.12.2004 DCN SA IO Eq

Equalizing a System To activate the ‘auto- equalisation’ procedure press the equalising recess switch (3) ‘Start’ once again. A noise will be heard and the busy LED will begin to flash, Indicating automatic equalisation is being processed. After the measurements, the filter Settings are calculated (this may take a few minutes). NOTES: To abort the auto equalisation procedure press any button on the CCU. Aborting restores the previous equalisation settings. 2. Selecting the auto- equalisation measurement process is only possible when in the “Single CCU” mode . 3. The equaliser function can be used with or without DCN software running. However, the ‘Auto’ equaliser facility will not function if the DCN software is running. loudspeaker used, particularly if a microphone is relative close to a loudspeaker. Switching between a microphone- loudspeaker combination and another can result in an entire different frequency response. Therefore, equalisation has primarily an advantage if the microphone is in the diffuse field of the loudspeaker, for example if a separate PA system is used. The equaliser is only active on the delegate loudspeaker channel and the equalised PA output. The equalised PA output is only available on the Audio Media Interface LBB3508/ 00, channel 12. 06.12.2004 DCN SA IO Eq

Equalizing a System End of section  Robert Bosch GmbH All rights are reserved. Reproduction or passing on to third parties in whole or in parts is prohibited without the written consent of the copyright owner. 06.12.2004 DCN SA IO Eq