D14489.01—JULY 2009
42
Quick Set C20/C20plus
Administrator Guide
Contents
Introduction
Getting started
About the menus
Advanced settings
Settings Library
Cameras
Appendices
Contact us
Appendices
General room guidelines
The physical conditions
When building a video meeting room, or using an existing room for
video meetings there are a few guidelines to consider.
Lighting
s
The illumination should be distributed evenly in the room to obtain
low contrast
s
The ideal light intensity is a little higher than in an ordinary meeting
room. Typically, the luminous intensity should be 800–1400Lux,
measured at the table with an incident light meter
Seating area and table
s
The seating area and table should be non-shiny and non-patterned
s
The seating area should allow all participants to see the monitor
Walls
s
The color of the wall should be in good contrast to skin tonality
Light blue is a complementary color to skin tonality, it gives a good
contrast and is commonly used
s
Acoustically reflective surfaces (such as glass or concrete) should
be covered with curtains or sound treatment
Audio
s
The Noise Floor (the sum of all the noise sources) should be less
than max 35dBA
s
The reverberation time should be 0,3 to 0,5 seconds
Ventilation
s
The requirements for ventilation is as in an ordinary meeting room.
Do not cover up the openings for ventilation in the front and rear
side of the codec. Consult the specifications for the monitor for
data about the energy consumption. The
TANDBERG Codec C20
together with the
TANDBERG PrecisionHD 1080p
camera has the
following specifications:
s
Max rating – 45 Watts
s
Normal operation – 39 Watts
s
Keep in mind the Noise Floor (see Audio)
s
Velocity creates noise, therefore keep velocity of air low
The room equipment
When placing and using the room equipment there are a few
recommendations and guidelines to consider.
The microphone
s
Place the microphone so that all participants have eye contact with
the microphone when using the system. The microphone must not
be hidden behind obstacles like laptop, projector or other equipment
placed on the table.
s
Place the microphone away from noisy equipment like computer
and projector fans, power outlets or similar arrangements on the
table. The microphone will pick up noise from these arrangements
quite strongly. Avoid noise from paper rustling and tapping with
fingers on the table.
Guidelines when using two microphones
Normally a single microphone should suffice to serve all the participants.
However, if this is not the case you will need to use two microphones.
You must then make sure they are spaced sufficiently apart to avoid
that the sound of the first microphone suffers from interference from the
second microphone. As a rule of thumb, the second microphone should
be placed three times or longer away from a participant compared
to the microphone closest to that participant. This is the case for all
participants. If you cannot fulfill this requirement you will probably not
need the second microphone in the first place. Instead inspect the site
to ensure that all participants have eye contact with the microphone
when using the system.
The camera
s
The camera should be able to “see” all participants in the room. Use
the pan, tilt and zoom features to adjust the picture.
The PC
s
Make sure that any PC’s placed on the table do not cover the
microphones as this will reduce the audio quality at the far end
Position of the system
s
Position the video system in such a way that all participants
attending the meeting are visible to the far end.
s
If appropriate, the far end should be able to see people entering or
leaving the room
Other peripherals
s
Arrange all the peripherals so that the chair person can reach each
of them to point, change the display, DVD, and still be fully visible on
screen while carry out the task
Environmental considerations
This section explains how to carry out basic adjustments and simple
tests to ensure that you send and receive the best possible image and
audio quality when using your system.
Iris control and lighting
By default the system camera will use an automatic iris to compensate
for changes in lighting. In addition to this feature, you may further
assist the system to maintain the best possible image quality by paying
special attention to environmental lighting and background colors as
described below.
Remember the system will send live images of both yourself and your
immediate surroundings.
s
Avoid direct sunlight on the subject matter i.e. yourself, the
background or onto the camera lens as this will create harsh
contrasts
s
Avoid placing the seatings in front of a window with natural daylight,
as this will make the faces of people very dark
s
If light levels are too low you may need to consider using artificial
lighting. As described above, direct illumination of the subject
matter and camera lens should be avoided
s
When using artificial lighting, daylight type lamps will produce the
most effective results. Avoid colored lighting
s
Indirect light from shaded sources or reflected light from pale walls
often produces excellent results
s
Avoid harsh side lighting or strong light from above. Strong sunlight
from a window or skylight may put part or all of the subject matter in
shadow or cause silhouetting
Participant
MIC1
MIC2
X
3X
