SC-05-05 meeting report, Rome, 2013-05

Report of the meeting of the SC-05-05 Working Group on Grounding and EMC Practices of the SC-05 Subcommittee on Interconnections held in Rome, Italy, 2013-05-05

The meeting was convened by chairman B.C. Olson.

The agenda was accepted as written. A report of the previous meeting was not available.

Projects assigned to this group but not mentioned here had no action requested or required - see www.aes.org/standards/meetings/project-status.cfm for details.

Open Projects

The following standards are due for their 5-year review. The meeting proposed to reaffirm them.

AES54-1-2008, AES standard on interconnections - Grounding and EMC practices - Connection of cable shields within connectors attached to portable balanced audio cables

AES54-2-2008, AES standard on interconnections - Grounding and EMC practices - Shields of balanced audio wiring within fixed and portable passive connector panels, jack fields, and passive microphone splitters

AES54-3-2008, AES standard on interconnections - Grounding and EMC practices - Shields of balanced microphone-level outputs of active equipment other than microphones

Development Projects

AES-X152: Signal levels and impedances of analog audio interfaces
Scope: To develop a standard for signal levels and circuit impedances of audio system components and for the specification of these quantities in product data sheets [balanced, unbalanced]

Discussion: J. Woodgate to review and fix terminology that differs from that set by IEC. The working group is asked to offer comments on the power amplifier section to expand it in a similar way as the existing output parameters section.

The meeting felt that it would be useful to add information about a description of power consumption related to different audio source signals such as: Speech shaped spectrum, Broadband pink noise, or a sine wave.

Liaisons:

There were no liaison issues.

New Projects:

There were no new projects.

New business:

J. Woodgate discussed the latest status of the upcoming versions of the EMC Immunity and Emissions standards. IEC CISPRA 32 (Emissions) and IEC CISPRA 35 (Immunity) will cover AESSC projects and equipment of interest to AES members. Earlier European EMC standards - EN 55032 (Emissions), and EN 55035 (Immunity) - will be retired.

Woodgate suggested that these EMC standards would be imprtant for the audio industry internationally and proposed that a short description of them be circulated to the AES membership.

The next meeting will be scheduled in conjunction with the AES 133rd Convention in San Francisco, CA, USA, 2012-10.

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AES - Audio Engineering Society