Re: Separation between charging circuits and TNV-3(UL60950)

In a message dated 5/2/2003, you write: For cordless phone, in most cases, the charging circuits are touchable. So based on 6.2.2.2, we need apply 1000Vac between the charging circuits and TNV-3. Usually it'll fail if there is no isolation transformer after Tip and Ring. Most of the

RE: EU Language requirements for Manuals

Gerald, is the Spanish requirement for a particular directive? Which one(s)? Richard Woods Sensormatic Electronics Tyco International From: Gerald Tammi [mailto:gera...@zoom.com] Sent: Thursday, May 01, 2003 9:52 AM To: 'ext-dave.wil...@nokia.com'; john_t...@bose.com;

Separation between charging circuits and TNV-3(UL60950)

Hi, All For cordless phone, in most cases, the charging circuits are touchable. So based on 6.2.2.2, we need apply 1000Vac between the charging circuits and TNV-3. Usually it'll fail if there is no isolation transformer after Tip and Ring. Most of the manufacturers don't want to add an

RE: D of C again

It clearly covers the intent of the requirement -- the customer has information regarding what regulations and standards the product meets in an official document published by the manufacturer. The authenticity of the manual is for all practical legal purposes binding on the company. A

Re: Heat sink thermal impedance.

I'll take a guess at the terms. I suspect the term thermal impedance may be misapplied. There is a rather lose parallel. Electrical resistance is a scalar quantity. Electrical impedance is a vector quantity. In a strict sense the impedance to heat transfer is a 3D quantity that can be

TSB31-B: Any updates to the FCC Part 68 guidelines?

Greetings All, Does someone in the group have an idea if the document TSB31-B (February 1998 Issue), Part 68 Rationale and Measurement Guidelines, will be updated to cross reference to the TIA standard, TIA-968-A, Technical Requirements of Terminal Equipment of the Telephone Network? Since the

RE: AC outlet max current

Hi Rocky, Article 210 of the NEC lists the requirements for branch circuits and associated receptacles. Table 210.21(B)(2) shows the receptacle load limits and section 210.23 discusses the permissible loads in more detail. On a related topic, I recently had a discussion with a colleague

Re: D of C again

I read in !emc-pstc that Wagner, John P (John) johnwag...@avaya.com wrote (in 4203D61676D0AE468AA5CEA90A891C130288F018@cof110avexu4.global. avaya.com) about 'D of C again' on Thu, 1 May 2003: I agree with Paul. It is usually very difficult to print the DoC in the users manual. Ordinarily, the

RE: ESD gun verification

Some time back there was a fellow in Belgium offering a rather clever ESD Verification device in the $4800 range. It tracked the rise time and current against the 61000-4-2 Spec. Less than 25% of the cost of a 6 Ghz bandwidth scope. I seem to remember his name was Hendrix from Heavox Company or

RMCEMC May Bonus Meeting

To all interested parties: The RMCEMC is pleased to announce a bonus meeting for our May schedule. On May 13th Lee Hill from Silent Solutions will present: Signal Integrity/EMI Challenges Design Solutions - A Seminar Please go to our website at http://www.ieee.org/rmcemc Best Regards Charles

Re: AC outlet max current

Kenneth, NEC 2002 Section 210.20(A) says Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load. overcurrent rating/125%

RE: FCC Limits

From: Andre, Pierre-Marie [mailto:pierre-marie.an...@intel.com] Sent: Tuesday, April 29, 2003 7:00 AM To: lfresea...@aol.com Cc: emc-p...@majordomo.ieee.org Subject: RE: FCC Limits You can visit : http://www.access.gpo.gov/nara/cfr/waisidx_01/47cfr15_01.html Good luck Pierre-Marie Andre

RE: D of C again

Good questions Santo. Our particular RTTE products do not have user manuals perse since they are professionally installed and there are no user controls. Therefore, the DoC is on a single sheet of paper in the box. There are some that have advocated providing information to the user that says the

Enquiry on French Law pertaining to human ears

This is a multi-part message in MIME format. Hi, Has anyone come across this requirements ? (See attached file: Code sante publique Article L_ 44-5.htm) Please share with me on the followings: (1) Is this a Legislative law in France? or just a self-voluntary requirement? (2) Who is the

Re: ESD failure

By process of elimination the failure you describe could be caused by either ground bounce or induced current. In this case the negative polarity rules out ground bounce so you are looking for an induced current path. This is probably some lightly loaded input. Since you say that some ASICs

Re: ESD failure

There's a temptation to troubleshoot these problems by applying bandaids until one works. They're usually the wrong bandaids, and it takes a long time to learn which one is right, if any. I've found it useful instead to inject short pulses directly into suspect devices and traces using a pulse

Re: ESD failure

Ravinder, Try putting small (around 22pF) capacitors to ground on resets, interrupts, and other asynchronous inputs to the ASIC, very close to the ASIC. I would be especially suspicious of any signals that run close to the card edge or have significant loop areas between the signal and return.