Bosch CCS 900 Ultro Installation And Operating Manual

CCS 900 Ultro Operation | en 21Bosch Security Systems B.V. Installation and Operating Manual IOM_CCS900 | V1.0 | 2010.066.11 Volume control of the Delegate and Chairman UnitsFigure 6.11Turn the volume control (1) to set the volume of the loudspeakers of the Delegate andChairman Units (2). Adjust for maximum level without feedback. In the fully counterclockwiseposition all loudspeakers are muted.6.12 Volume control of the Delegate and Chairman UnitsFigure 6.12Put the Digital Acoustic Feedback Suppressor switch (1) in position "0" and adjust theloudspeakers for maximum level without feedback. Switch Digital Acoustic FeedbackSuppression on by changing the switch (1) to position "1". Then set the loudspeaker volumeto the required level, but increasing the volume level more than 2 or 3 steps is notrecommended.NOTICE!With the use of Digital Acoustic Feedback Suppression the loudspeaker volume can beincreased significantly before acoustic feedback appears. The maximum achievable volumegain depends on the acoustical environment and positioning of the units. Artefacts may occurduring microphone switching at very high volume levels. In general the achievable increasedvolume gain is 4 - 6 dB. The Digital Acoustic Feedback Suppression is optimized for speech.