User`s guide

Administrator’s Guide for Polycom HDX Systems
4–20 Polycom, Inc.
Audio Meters
The audio meters in the user interface allow you to identify left and right
channels. The meters also indicate peak signal levels. Set signal levels so that
you see peaks between +3 dB and +7 dB with normal speech and program
material. Occasional peaks of +12 dB to +16 dB with loud transient noises are
acceptable. If you see +20 on the audio meter, the audio signal is 0 dBFS and
the audio might be distorted.
Testing StereoSurround
After you configure the system to use Polycom StereoSurround, test the
system configuration and place a test call.
To test your stereo configuration:
1 Make sure the microphones are positioned correctly.
Refer to Placing Polycom Microphones to Send Stereo from Your Site on
page 4-8.
2 Do one of the following
— In the local interface, go to System > Admin Settings >Audio > Stereo
Settings (select if necessary).
— In the web interface, go to Admin Settings >Audio Settings.
3 Gently blow on the left leg and right leg of each Polycom microphone
while watching the Left and Right meters to identify the left and right
inputs.
4 Select if necessary.
Stereo Positions the audio input within the left and right channels.
Left sends all of the audio to the left channel. Right sends
all of the audio to the right channel. For Polycom HDX
digital microphones and ceiling microphones, Left+Right
sends audio from one microphone element to the left
channel and audio from a second element to the right
channel.
Autorotation Specifies whether autorotation is used for Polycom HDX
microphones. If this feature is enabled, the system
automatically assigns left and right channels for the
microphone based on sound it senses from the left and
right speakers.
Note: This feature does not work when headphones are
used.
Setting Description