Radiated field strength limits above 1 GHz are in the final stage of approval in all European and other International EMC bodies including all CISPR Sub Committees A to G, ETSI EE4, CENELEC TC 210, etc.
Proposed limits in different committees were supported by U.S. TAGs (Technical Advisory Groups) as formally proposed over two years ago by Bernard Despres from France Telecom. Mirko Matejic Foxboro Co. ---------- From: Geoffrey Skanes To: [email protected] Subject: re:EMI Receiver requirements List-Post: [email protected] Date: Wednesday, February 26, 1997 9:56AM In message "EMI Receiver requirements", you write: > > Yet more questions to pose to the forum......,. > > EMI Receivers - do spectrum analyzers used for radiated emissions > measurements have to conform to CISPR 16 for FCC testing? How about FCC > testing to CISPR 22 limits? Does the requirement for a CISPR compliant > receiver end once you exceed the 1 GHz frequency barrier? > > I currently have a non-CISPR 16 compliant .10 KHz - 28.5 GHz capable HP > analyzer. My question is can I use this for compliance testing? It seems > to me that I can use it above 1 GHz, but not below. If this is true, can I > expect new high-frequency CISPR requirements to be updated to include CISPR > 16 compliant test equipment above 1 GHz? > > I am trying to decide what test equipment I need to purchase to allow FCC > and CE-mark emissions compliance testing. Any info would be helpful! > > > Regards, > > Randall T. Flinders > EMC Test Engineer > Emulex Corporation > Randall: Presuming its a digital device you're testing, Section 15.31(a)(6) of FCC Part 15 states you have to use ANSI C63.4-1992 as the measurement procedure. In section 4.1.1 of ANSI C63.4-1992, you are instructed to use a measurement instrument conforming to ANSI C63.2-1987. ANSI C63.2 was re-issued in 1996 (ANSI C63.2-1996). In its scope (section 1.2), ANSI C63.2-1996 confirms that the required receiver characteristics agree with CISPR 16 as it pertains to the quasi-peak detector. That is, over the range 10 kHz to 1 GHz. Above and beyond this range, ANSI C63.2-1996 describes specific criteria for receiver bandwidth and detector function. So, in answer to your question, you cannot use a non-CISPR 16 compliant analyser for compliance testing (engineering, yes, I do it all the time). Above 1 GHz, review the specific criteria in ANSI C63.2-1996. Can you expect new high-frequency CISPR requirements in the future? I've seen working documents from, as I recall, CISPR G concerning new limits above 1 GHz for emissions. I don't know how likely these limits will be integrated into CISPR 22, but if limit levels are being bandied about, receiver characteristics can't follow too far behind. I hope this was helpful. Regards, Geoff Skanes EMC Engineer Nortel Technology
