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The grounding problem of vp8020, mixing console and other audio device

Publication Date:  2012-09-18 Views:  37 Downloads:  0
Issue Description
There is a series vp8000 device, including vp8020, mixing console, SONY conference device, conference telephone device. vp8020, SONY conference device, conference telephone device should place in mixing console at the same time to improve the use rate. When finished connecting all the devices and test the system’s audio effect, we can hear the vp8000 conference system AC voice. Firstly, we grounded all the audio devices, but the system still had the same problem; as we found the audio system used 3 power sockets, at last, we gather the power supply of these 3 devices( vp8020, mixing console, SONY conference device) into the same power socket, as a result the AC voice disappeared.
Alarm Information
None
Handling Process
If we find the audio system uses 3 power sockets, we should gather the power supply of these 3 devices (vp8020, mixing console, SONY conference device) into the same power socket, and the AC voice will disappear.
Root Cause
The order between live line and neutral wire of power supply may affect the audio device, so,it is best to use the same power socket, when we use vp8028 and other audio device at the same time.
Suggestions
None

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