Polycom RealPresence Group 700 system User Manual page 41

User's Guide for the Polycom RealPresence Group Series
Polycom, Inc.
Diagnostic Screen
Audio Meter
Reset System
Near End Loop
Description
Measures the strength of audio signals from the
microphone or microphones, far-end audio, VCR audio,
and any device connected to the audio line in.
• To check the microphone or microphones, speak into
the microphone.
• To check far-end audio, ask a participant at the far
end to speak or call a phone in the far-end room to
hear it ring.
• To check a VCR or DVD, connect it to the VCR inputs
and play the VCR or DVD to test the audio.
The Audio Meters indicate peak signal levels. Set signal
levels so that you see peaks between +3dB and +7dB
with normal speech and program material. Occasional
peaks of +12dB to +16dB with loud transient noises are
considered acceptable. A meter reading of +20dB
corresponds to 0dBFS in the Polycom RealPresence
Group system audio. A signal at this level is likely
clipping the audio system.
Meters function only when the associated input is
enabled.
Note: Some audio meters are unavailable when a
SoundStructure digital mixer is connected to the
Polycom RealPresence Group system.
Note: Do not use this setting unless your administrator
tells you to do so.
When you choose Reset System using the remote
control, the system's user interface allows you to do the
following:
• Keep your system settings (such as system name and
network configuration) or restore factory settings.
• Keep or delete the directory stored on the system.
System reset does not affect the global directory.
• Keep or delete certificates stored on the system.
Tests the internal audio encoders and decoders, the
external microphones and speakers, the internal video
encoders and decoders, and the external cameras and
monitors.
Monitor 1 displays the video and plays the audio that
would be sent to the far end in a call.
This test is not available when you are in a call.
37