LifeSize Room 200 Installation Manual page 12

LifeSize recommends a volume setting of 5 to 10 for Active Microphone Volume for most
LifeSize Focus applications.
If you set Active Microphone Volume to a line in option when using an external mixer or
amplified microphone, follow these steps:
1. Select either Line in 1(no AEC) or Line in 2 (no AEC) for Active Microphone depending
on the line in connector on the codec to which the device is attached.
2. Position someone approximately one meter from the microphone, facing it, speaking at
a normal volume.
3. Adjust the Active Microphone Volume and the external mixer output level until the
meter peaks in the -28 to -22 dB range. LifeSize recommends you adjust the external
mixer volume so that you achieve peak levels in the -28 to -22 dB range of the audio
meter with the Active Microphone Volume control no less than 5 or greater than 15.
4. If the microphone or mixer you use employs an echo canceller, no further adjustments
are necessary. Otherwise, select Line In 1 or Line In 2 for Active Microphone. This
turns on the LifeSize system's echo canceller, noise reduction, and automatic gain
control functions. If you do not use an echo canceller, you may experience severe echo
effects.
5. After the adjustment, check that the peak levels when speaking normally one meter from
the microphone are in the -28 to -22 dB range. The AGC attempts to keep the transmit
level below -20 dB, which is the green range of the bar graph.
An audio meter is also available for the Line In 1 Volume and Line In 2 Volume
preferences for setting an audio level for a device connected to these inputs on the codec
when the line in 1 or line in 2 is not selected as the active microphone.
Audio Preferences: Video and Voice Call Output
If you plan to use external speakers other than LifeSize Phone for audio in both video and
voice calls, ensure that the Video Call Audio Output and Voice Call Audio Output
preferences are set to Line Out. If you are using LifeSize Phone for audio, set these
preferences to Phone. By default, Video Call Audio Output is set to Line Out; Voice Call
Audio Output is set to Phone.
12 LifeSize Room 200 Installation Guide