Krzysztof The medical device standards EN 60601-1-2, and the US FDA regulations require the use of a modulation frequency that is representative of the function being measured. (i.e. respiration, heart rate, brain waves, etc.) This makes for an interesting test as the frequencies involved are usually a range that has to be swept for each Carrier frequency step.
John Mowbray EMC Engineer NCR Canada > -----Original Message----- > From: [email protected] [SMTP:[email protected]] > Sent: Friday, September 24, 1999 6:22 AM > To: [email protected] > Subject: Modulations during Radiated Immunity Tests > Importance: High > > > Dear Group, > My matter concerns different kinds of modulation used during radiated > immunity tests. For instance: > > IEC 1000-4-3: 1995 describes 80%-depth Amplitude Modulation with a 1kHz > sinwave, > > ENV 50204: 1995 describes keyed carrier modulation (on-off, duty cycle > 50%). > > My question is: do you know any standards (international, national, > technical documentations, etc.) which describes different kind of > modulations than these above (for instance AM with squarewave or > Frequency Modulation or other ways of carrier keying) during tests. > Would you please give me the number and title of the standards, > frequency range, test levels and, of course, parameters of modulation. > > The second question: do you know any product, product family and other > standards which call AM80%1kHz modulation and keyed carrier - cycle duty > 50%. > > Thank you, > Krzysztof Sieczkarek > > Laboratorium Technik Automatycznej Identyfikacji > Instytutu Logistyki i Magazynowania > Poznan, Poland > fax +48 61 8526376 > http://www.ilim.poznan.pl/la/index_E.html > > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
