D14129.02—NOVEMBER 2008 40
Codec C90 Administrator Guide
Contents Introduction Getting started About the menus About the settings Settings Library Cameras Appendices Contact us
General room guidelines

The physical conditions

When building a video meetin g room, or using an existing room f or
video meetings there are a few guid elines to consider.

Lighting

The illumination should be dis tributed evenly in the room to obt ain •
low contrast
The ideal light intensity is a li ttle higher than in an ordi nary meeting •
room. Typically, the luminous intensity sh ould be 800–1400Lux,
measured at the table with an inci dent light meter

Seating area and table

The seating area and table shou ld be non-shiny and non-pat terned•
The seating area should allow al l participants to see the mo nitor•

Walls

The color of the wall should be in goo d contrast to skin tonality •
Light blue is a complementar y color to skin tonality, it give s a good
contrast and is commonly used
Acoustically reflective sur faces (such as glass o r concrete) should •
be covered with curtains or sou nd treatment

Audio

The Noise Floor (the sum of all the no ise sources) should b e less •
than 44 dBC
The reverberation time should b e 0,3 to 0,5 seconds•

Ventilation

The requirements for ventilatio n may be a little higher than i n an •
ordinary meeting room. Consu lt the specifications for t he monitor
for data about the energy consum ption. The TANDBERG Codec
C90 together with the TANDBERG Precisi onHD 1080p camera
has the following specificatio ns:
Max rating – 175 Watts•
Normal operation – 110 Watts•
Standby – 110 Watts•
Keep in mind the Noise Floor (se e Audio)•
Velocity creates noise, therefore ke ep velocity of air low•

The room equipment

When placing and using the room e quipment there are a few
recommendations and guide lines to consider.

The microphone

The microphones should be eve nly distributed on the tabl e. Avoid •
positions where they can be hidd en behind obstacles li ke laptop,
projector or other equipment pl aced on the table
Do not place a microphone close to powe r outlets or similar •
arrangements on the table. Th e microphone will pick up no ise from
these arrangements quite stro ngly

The camera

The camera should be able to “see” a ll participants in the roo m. •
Use the pan, tilt and zoom features to adju st the picture.

The PC

PC’s placed on the table should not cover th e microphones as this •
will reduce the audio quality a t the far end

Position of the system

Position the video system in such a way th at all participants •
attending the meeting are visib le to the far end.
If appropriate, the far end should b e able to see people enterin g or •
leaving the room

The document camera

The document camera shoul d be close to the chair person o r a •
designated controller of the doc ument camera for ease of us e
Make sure this person is visible o n screen while carry o ut the task•

Other peripherals

Arrange all the periphera ls so that the chair person ca n reach each •
of them to point, change the display, DVD, and still be f ully visible
on screen while carry out th e task

Environmental considerations

This section explains how to carr y out basic adjustment s and simple
tests to ensure that you send and recei ve the best possible image a nd
audio quality when using you r system.

Iris control and lighting

By default the system camera will u se an automatic iris to compen sate
for changes in lighting. In additi on to this feature, you may furthe r
assist the system to maintain the bes t possible image qualit y by
paying special attention to envi ronmental lighting and ba ckground
colors as described below.
Remember the system will send li ve images of both yourself an d your
immediate surroundings.
Avoid direct sunlight on the subje ct matter i.e. yourself, the •
background or onto the camera lens a s this will create harsh
contrasts
Avoid placing the seatings in front of a w indow with natural •
daylight, as this will make the faces of p eople very dark
If light levels are too low you may need to cons ider using artificia l •
lighting. As described above, dir ect illumination of the subj ect
matter and camera lens shoul d be avoided
When using artificial ligh ting, daylight type lamp s will produce the •
most effective results. Avoid col ored lighting
Indirect light from shaded sou rces or reflected light from p ale walls •
often produces excellent resu lts
Avoid harsh side lighting or strong l ight from above. Strong sunlig ht •
from a window or skylight may put p art or all of the subject ma tter
in shadow or cause silhouettin g

Loudspeaker volume

The audio system will use the Digit al Natural Audio Module ( DNAM)
which is integrated in the system. The volu me of the audio is controlled
by the Volume key on the remote control.