One other quick note when doing your EMC testing: All Service Providers (except Verizon) accept GR-1089-CORE issue 3. Verizon ONLY accepts GR-1089-CORE Issue 2. Some Service Providers will accept either Issue. SBC, Qwest, and Bellsouth require Issue 3. Verizon has additional requirements and deviations from both Issue 2 and Issue 3 (see www.verizonnebs.com NEBS Checklist) Verizon only permits testing at a Verizon approved lab as of January 1, 2003. SBC will only accept reports from NACLA labs (such as A2LA or NVLAP accredited labs) after January 1, 2004 (see SBC's TP 76200 at https://ebiznet.sbc.com/sbcnebs/) Based on information provided by Verizon at their NEBS seminar last month, they may adopt Issue 3 or some variant of it in the future. Or they may not. So beware that you and your test lab know who the customer is and what criteria you need to meet and which version of GR-1089 applies. And we thought GR-1089 was confusing with regard to doors open or closed requirements!
Jim Jim Wiese NEBS Project Manager/Senior Compliance Engineer ADTRAN, INC. 901 Explorer Blvd. P.O. Box 140000 Huntsville, AL 35814-4000 256-963-8431 256-963-8250 fax [email protected] From: [email protected] [mailto:[email protected]] Sent: Tuesday, November 18, 2003 10:59 AM To: [email protected]; [email protected] Subject: RE: GR-1089 Issue 3: 3.2.1 Radiated Emission Criteria 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: [email protected] [mailto:[email protected]]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:[email protected]
