Audio - Polycom HDX 4000 Series Administrator's Manual

Audio

Polycom, Inc.
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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.
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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.
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.
Statistics and Diagnostics
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