Polycom RealPresence Group 300 User Manual page 48

User's Guide for the Polycom RealPresence Group Series
44
Diagnostic Screen
Color Bars
Speaker Test
Audio Meter
Description
Tests the color settings of your monitor for optimum
picture quality.
If the color bars generated during the test are not clear,
or the colors do not look correct, the monitor needs to
be adjusted.
Tests the audio cable connections. A 473 Hz audio tone
indicates that the local audio connections are correct.
If you run the test from the system during a call, the far
site will also hear the tone.
Measures the strength of audio signals from the
microphone or microphones, far-site 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-site audio, ask a participant at the far site
to speak or call a phone in the far-site room to hear it
ring.
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.
Polycom, Inc.