It is my understanding that such ports ARE included in the scope. Comments >from experts on CISPR/I indicate that digital TV tends to have higher emissions than "traditional" TV signals. The intent of the standard is clearly to limit emissions from cabling structures. Unless test data shows otherwise, I think you're stuck.
John P. Wagner Regulatory Compliance & Mandatory Standards AVAYA Regulatory Compliance Laboratory 1300 W. 120th Ave, Room B3-D16 Westminster, CO 80234-2726 Phone/Fax: (303) 538-4241 johnwag...@avaya.com From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Friday, January 31, 2003 11:24 AM To: emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Unfortunately, EN 55022 is the only available emissions standard for CCTV products used for security applications. Even the standard for professional video equipment, EN55103-1, references EN 55022 as does the generic standard. Perhaps the CISPR ITE committee is not aware that they are affecting a lot of products other than ITE when they make changes to EN55022. Now back to my question about coax connected CCTV equipment. As I read the standard, I am going to have to test these video ports since the coax cables can extend for very large distances. It is just not clear that the authors had this in mind. Richard Woods Sensormatic Electronics Tyco International From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Friday, January 31, 2003 11:39 AM To: 'richwo...@tycoint.com'; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Richard, Cameras, monitors, etc are not ITE. CISPR 22 does not apply to them. Ghery Pettit Intel From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Friday, January 31, 2003 7:20 AM To: emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports OK, so "widely dispersed" is a key element in determining if a network needs to be tested. That is consistent with the problem of long balanced pairs having common mode emissions. The standard also includes tests for coax and alludes to emissions caused by imperfect shielding. That seems to imply that a network of video products (e.g., cameras, monitors, muxes, VCRs, etc) with base band signals in coax would also be subject to testing. However, it is not clear that is what the authors had in mind. Comments? Richard Woods Sensormatic Electronics Tyco International From: Carpentier Kristiaan [mailto:carpenti...@thmulti.com] Sent: Thursday, January 30, 2003 5:54 PM To: 'richwo...@tycoint.com'; emc-p...@majordomo.ieee.org Subject: RE: EN55022:1998 and telecom ports Richard, In addition to Gherys explanation of the note, there is also the definition itself that inherently excludes certain interfaces by means of the wordings widely dispersed and multi-user. But I agree that adding some more definitions of interfaces would help, also myself. Clause 6.3: Telecommunications port Point of connection for voice , data and signalling transfers intended to connect widely dispersed systems via such means as direct connection to multi-user telecom networks (e.g. PSTN, ISDN, xDSL, LAN (token ring, ethernet, etc) and similar networks. Note A port generally intended for connection of components of an ITE system under test (e.g. RS232, IEEE standard 1284 (parallel printer), USB, IEEE Std 1394 (fire wire) etc) and used in accordance with its functional specifications ( e.g. for the max. length of cable to be connected to it), is not considered to be a telecommunications/network port under this definition Regards, Kris This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. 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