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

2. 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.
DCN SA IO Eq

3. 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.
DCN SA IO Eq

4. 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.
DCN SA IO Eq