Richard, The root of the problem may be that you are interpreting the requirements as "OR" rather than "AND". GR-1089 requires you to meet R3-1 *AND* R3-2. Verizon also specifically calls out all these requirements in section 3.2.10.1 of their NEBS checklist. http://www.verizonnebs.com/index.html#chklist As well to answer your last question, GR-1089 is really only required by US ILEC customers for deployment in their COs/CEVs/Remotes/etc. These locations fall under the FCC Public Utilities exemption but, due to other reasons, this exemption is rarely used for new equipment. The utilities are still responsible for fixing any EMI-related issues. As an editorial comment, these GR-1089 requirements seem to me to be strongly favouring all new system designs to not use covers, doors, etc. as a form of EMI containment. That is certainly the easiest way to comply with these requirements. Cheers, Marko
From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of ext Georgerian, Richard Sent: Tuesday, November 18, 2003 8:31 AM To: IEEE emc-pstc Subject: GR-1089 Issue 3: 3.2.1 Radiated Emission Criteria Greetings All, Hopefully someone has some insight to the following- In GR-1089 Issue 3, Section 3.2.1, requirement R3-1 [8] uses the FCC Class A and B limits for equipment with no doors or covers for the range of 30MHz to 1GHz. It also has limits for below 30MHz and above 1GHz. This section I understand. What I don't understand clearly is requirement R3-3 [10]. It references emissions from Class A and B unit's not exceeding Table 3-2. Table 3-2 limits are higher than the FCC Class A and B limits. The doors or covers are to be opened during emission testing. However, if the doors and covers that are not intended to be opened during EUT operation, maintenance, and/or repair need not be opened, I can still test to those higher limits. If so, I can no longer can be considered FCC A or B equipment. Is requirement R3-3 [10] mainly for central office areas and not residential? Thanks. Richard ===== Richard Georgerian Compliance Engineer Carrier Access Corporation 5395 Pearl Parkway Boulder, CO 80301 USA Tele: 303-218-5748 Fax: 303-218-5503 mailto:rgeorger...@carrieraccess.com
