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Health Care System IIIAdvanced Use
Level Settings - Outputs
Adjust the audio output levels according to the parameters of the external audio equipment connected. These
levels should only be adjusted when installing new audio equipment. The default settings are correct for the
TANDBERG Natural Audio module and for most consumer electronics devices (televisions, VCRs, etc.).
The volume keys on the remote control adjust the level of output 1 (the speaker output). The volume control
has no effect on outputs 2 and 3.
Echo Control
Each of the 3 microphone inputs and Audio input 4 have a separate echo canceller.
One echo canceller per
input provides more sophisticated control than having one common canceller for all microphones.
Echo control is normally set to ‘On’ to prevent the far end from hearing their own audio. Once selected, echo
cancellation is active at all times. The echo canceller continously adjusts itself to the audio characteristics of the
room and compensates for any changes it detects in the audio environment. If the changes in the audio conditions are
very significant the echo canceller may take a second or two to re-adjust.
You can choose to switch off the echo canceller for the available audio sources.
ECHO CONTROL SHOULD BE SWITCHED ‘OFF’ IF EXTERNAL ECHO CANCELLATION OR PLAYBACK EQUIPMENT IS USED. IT IS YOUR ECHO
CANCELLER
THAT IMPROVES THE AUDIO QUALITY EXPERIENCED BY THE OTHER SITE. WHEN YOU HEAR AN ECHO OF YOUR OWN AUDIO IT IS
MOST LIKELY THE FAR END’S ECHO CANCELLER THAT IS MALFUNCTIONING.
Noise Reduction
In addition to echo cancellation, the system has built-in noise reduction (NR).
NR reduces constant background noise (e.g. noise from air-conditioning systems, cooling fans etc.). In
addition, a highpass filter (Humfilter) reduces very low frequency noise.
Choose On+NR to activate both Echo Control and Noise Reduction.
NOTE