Statistics and Diagnostics
Polycom, Inc. 11–7
Audio
Diagnostic Screen Description
Speaker Test 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.
If you run the test from the Polycom HDX web interface
during a call, the people at the site you are testing will hear
the tone, but you will not.
Audio Meter 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.
• 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 HDX 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
HDX system.
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