There is a general misconception that only the highest clock rate determines the frequency range of test. The definitions in the standards are not specific to clock frequencies, but rather to the frequencies generated or used.
FCC: "Highest frequency generated or used in the device or on which the device operates or tunes (MHz)" CISPR 32: highest fundamental frequency generated or used within the EUT or highest frequency at which it operates NOTE - This includes frequencies which are solely used within an integrated circuit. Bill Stumpf - Lab / Technical Manager D.L.S. Electronic Systems, Inc. 166 South Carter Street Genoa City WI 53128 Ph: 262-279-0210 From: Rodney Davis [mailto:[email protected]] Sent: Friday, January 29, 2016 8:18 AM To: [email protected] Subject: Re: [PSES] Highest clock frequency in a device. Highest clock! not data rate. Rodney Davis ________________________________ From: Robert Dunkerley <[email protected]<mailto:[email protected]>> Sent: Friday, January 29, 2016 8:56 AM To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] Highest clock frequency in a device. How would you treat a piece of IT equipment that had say a 10Gbit/s Ethernet port? Do you just treat this as 10GHz, and use that as the highest clock? Rob. -----Original Message----- From: Bill Stumpf [mailto:[email protected]] Sent: 29 January 2016 13:48 To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] Highest clock frequency in a device. I posed that question to the FCC many years ago and got the answer that the transmitter operating frequency now becomes a frequency of the host device. Therefore a device that operates at, say 50 mHz but has a Wi-Fi transmitter installed shall be tested to the frequency specified in 15.33 based on the 2.4GHz radio. Bill Stumpf -----Original Message----- From: Charlie Blackham [mailto:[email protected]] Sent: Friday, January 29, 2016 3:05 AM To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] Highest clock frequency in a device. > Hmm. An on-board WiFi device "uses" (non-clock) GHz range frequencies -- internally. That would be an intentional transmitter though and covered by different FCC rule part / EU standards Charlie -----Original Message----- From: Cortland Richmond [mailto:[email protected]] Sent: 29 January 2016 08:57 To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] Highest clock frequency in a device. On 1/28/2016 2:42 PM, Chuck McDowell wrote: > > To quote from BS EN 55032:2012 with 2014 update > > 3.1.19 > > highest internal frequency > > Fx > > highest fundamental frequency generated or used within the EUT or > highest frequency at which it operates > > NOTE This includes frequencies which are solely used within an > integrated circuit. > Hmm. An on-board WiFi device "uses" (non-clock) GHz range frequencies -- internally. Running for cover ... Cortland Richmond - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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