CCS 800 Ultro Installation and Operating Manual
en 15
6.10Volume control of the delegate and chairman units 
CCS 800 ULTRO
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Figure 6.10
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.
6.11Using Digital Acoustic Feedback Suppression (DAFS)
Trunk in/out | Microphone | Recorder | Line | Telephone | Insertion |
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Figure 6.11
Put the Digital Acoustic Feedback Suppression 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.
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Note
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 optimised for speech.
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