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
