Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Notch filters are a good option if you can find one for your application. However you do need to "calibrate" them to get attenuation factors well above and below the notch frequency. You will find that they usually have significant attenuation at harmonics of the notch frequency of the filter.

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Hi Balmukund, A good point. I've certainly used notch filters in the past for removing the intentional radiator to prove that the second harmonic is in fact an artefact of the measuring instrument. I've also done this by increasing the attenuation on the input to the analyser until the second

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Is it possible to use notch filters and measure rest of the frequencies? -Original Message- From: T.Sato [mailto:vef00...@nifty.com] Sent: 25 July 2017 17:41 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters Hello

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Hello members, Thanks all who responded. I hope CISPR makes this topic clear in near future. Regards, Tom -- Tomonori Sato URL: http://t-sato.in.coocan.jp On Sat, 22 Jul 2017 03:10:27 +0900, "T.Sato" wrote: > Hello members, > > I want to hear

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

I would suggest asking for an interpretation (through the IEC or your national committee) from CISPR SC I on this. It needs to be a formal request, an email string here doesn't work. CISPR SC I will likely forward this to CISPR SC I WG2 (MT7 after the beginning of October) and it will be up to

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

I can say, from personal experience, that high speed I2S bus communications with a modularly approve intentional radiator makes a significant change in the unintentional emissions. It may be/has been necessary to use a band notch filter at the fundamental intentional frequency to keep from

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Hi Tom, I appreciate your argument, it's something I've discussed with colleagues in the past. I have tested a few products where the digital bus to the radio module has caused EMC problems. These emissions have only been visible when data is being actively transferred across the CPU - digital

Re: [PSES] application of CISPR 32 to EUTs with integrated radio transmitters

I think CISPR 32 needs to be clarified, perhaps by an Interpretation Sheet. In principle, tests should be done under as near 'normal operating conditions' as possible, which would mean 'transmitter on'. But ignoring the transmission band and harmonics could let through a non-transmitter related

[PSES] application of CISPR 32 to EUTs with integrated radio transmitters

Hello members, I want to hear of your opinion - while emission measurement for CISPR 32, integrated radio transmitters must transmitting? Although the standard is not clear whether radio transmitter can be set off in emission measurement, I believed we can set radio transmitter off, as: -