Volume Control Of The Delegate And Chairman Units - Bosch CCS 900 Ultro Installation And Operating Manual

CCS 900 Ultro
6.11

Volume control of the Delegate and Chairman Units

Figure 6.11
Turn the volume control (1) to set the volume of the loudspeakers of the Delegate and
Chairman Units (2). Adjust for maximum level without feedback. In the fully counterclockwise
position all loudspeakers are muted.
6.12 Volume control of the Delegate and Chairman Units
Figure 6.12
Put the Digital Acoustic Feedback Suppressor switch (1) in position "0" and adjust the
loudspeakers for maximum level without feedback. Switch Digital Acoustic Feedback
Suppression on by changing the switch (1) to position "1". Then set the loudspeaker volume
to the required level, but increasing the volume level more than 2 or 3 steps is not
recommended.
NOTICE!
With the use of Digital Acoustic Feedback Suppression the loudspeaker volume can be
increased significantly before acoustic feedback appears. The maximum achievable volume
gain depends on the acoustical environment and positioning of the units. Artefacts may occur
during microphone switching at very high volume levels. In general the achievable increased
volume gain is 4 - 6 dB. The Digital Acoustic Feedback Suppression is optimized for speech.
Bosch Security Systems B.V. Installation and Operating Manual
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IOM_CCS900 | V1.0 | 2010.06