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The mixing console of a conference site output the noise which imported to the terminals

Publication Date:  2012-09-22 Views:  178 Downloads:  0
Issue Description
When a conference site holding a meeting, it’s very noisy, the conference can’t continue.
Alarm Information
none
Handling Process
The noise is AC buzzing sound, when the conference site close the sound, the noise still exists. When we do the loop sound test in the conference site, found out the noise is still large. Check up again; found the noise come from the mixing console, the noise export from an effect sound port and import into the LINE IN of the conference TV terminal. If we connect the mike directly with the terminal, the noise disappears, so we know that the mixing console is the main source of the noise.
Root Cause
When using the mixing console as the audio  peripheral ,  The mixing console connect many conference TV. When the mixing console has malfunction or the connection failed, it’s very easy to induce the sound fault. So we must make sure that the peripheral works normally.
Suggestions
none

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