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VISION 5000 Videoconferencing SystemAdvanced use
Audio input 6 is intended for connection to a VCR. It can also be connected to other external playback
devices. As there is no acoustic echo canceller on this input it should not be connected to any microphones.
The audio entering this input will be heard from the local speaker.
Mix Mode
Auto automatically adjusts the weighting of each microphone to obtain the best possible audio and
minimizes the background noise. Auto will also attenuate the VCR audio when someone talks into a
microphone. Fixed will keep a constant weighting of all microphones.
Level Settings - Inputs
Audio level: |||||| Mic1
========= Level Settings =========
Mic1: || +3.0dB
Mic2: || +3.0dB
Mic3: || +3.0dB
Audio4: |||| +9.0dB
Audio5(AUX): |||| +9.0dB
Audio6(VCR): |||| +9.0dB
Previous Menu
Adjust the audio input levels according to the parameters of the external audio equipment connected. These
levels should be adjusted when installing new audio equipment only. The audio level for the current audio
source is displayed in the indicator area. The audio level indicator will make it easier to set correct input level
settings. The input level should be adjusted so that the average level reaches the preferred level marker.
The audio inputs are adjustable in steps of 1.5 dB from 0 dB to 22.5 dB.
The default levels for Mic 1,2 and 3 are set for use with an Audio Technica AT871 microphone in an
average videoconferencing room. The gain can be adjusted correctly for a wide range of microphones.
A few examples of microphone levels are:
Crown PCC-160 +3dB
Audio Technica AT851R +7dB
Tandberg Audio Science +12dB
Audio 4, 5 and 6 are set to a default level which is adhered to by most manufacturers of audio-visual
equipment and is a level which most audio-visual equipment (CD-players, VCRs) will work at.