Mexico requirements

2003-07-08 Thread Bill Stumpf

To all,
If a manufacturer of an FCC Part 18 device (ISM) wants to sell in Mexico,
what are the procedures for meeting the Mexico standards? Is the MRA in
sight? I know of the Telecom NOM's, but not about ISM equipment procedures.
This is the first time we've had this inquiry, so any information would be
helpful.
Thanks to all.

Bill Stumpf
DLS Electronics
166 South Carter St.
Genoa City WI 53128
ph: 262-279-0210
fx: 262-279-3630
email: bstu...@dlsemc.com










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RE: Instrument Controller Software

2003-07-08 Thread Price, Ed
  
-Original Message- 
From: John Cronin [ mailto:croni...@hotmail.com] 
Sent: Tuesday, July 08, 2003 11:29 AM 
To: emc-p...@majordomo.ieee.org 
Subject: Instrument Controller Software 





Hi 
I have a requirement to log the screens from a spectrum analyser over a period
of between one day and one week.  I have been using the DDDA software from
Stanford research with some success.

However, I need a slightly more sophisticated package that will allow me to
dump screens as plots at 15 minutes intervals over a prolonged period unto a
laptop using GPIB.

I envisage using an Advantest 3265 or HP 8562 analyzer. 
Can anyone point me in the right direction? 
Mnay thanks 

John Cronin 




John: 


HP used to have a program called Benchlink, a simple controller and data
dumper for their instruments. It was available by download, in a free 30-day
trial version, from their website. Try the Agilent site now.

Ed 

Ed Price 
ed.pr...@cubic.com WB6WSN 
NARTE Certified EMC Engineer  Technician 
Electromagnetic Compatibility Lab 
Cubic Defense Systems 
San Diego, CA  USA 
858-505-2780  (Voice) 
858-505-1583  (Fax) 
Military  Avionics EMC Is Our Specialt
http://www.ieeecommunities.org/emc-pstc 




Re: Instrument Controller Software

2003-07-08 Thread robert Macy

John,

If you buy a GPIB card for your laptop *and* your analyzer
has the GPIB interface *and* you get your analyzer's
software manual, you can learn and write all the software
you need for your project in less than 2 hours.  

Ok, ok, more like 6 hours, but still

  - Robert -

   Robert A. Macy, PEm...@california.com
   408 286 3985  fx 408 297 9121
   AJM International Electronics Consultants
   101 E San Fernando, Suite 402
   San Jose, CA  95112



On Tue, 08 Jul 2003 18:29:04 +
 John Cronin croni...@hotmail.com wrote:



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Instrument Controller Software

2003-07-08 Thread John Cronin




Hi 

I have a requirement to log the screens from a spectrum analyser over a period
of between one day and one week.  I have been using the DDDA software from
Stanford research with some success.

However, I need a slightly more sophisticated package that will allow me to
dump screens as plots at 15 minutes intervals over a prolonged period unto a
laptop using GPIB.

I envisage using an Advantest 3265 or HP 8562 analyzer.

Can anyone point me in the right direction?

Mnay thanks

 

John Cronin

 

 


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EU Language Requirements

2003-07-08 Thread Bob Zmudka

Does the EU language requirements for user instruction/information extend to
software user interfaces or is it reasonable to limit it to just user and
service manuals?  Also, what about licensing agreements and warranty
information?

Thanks in advance for your insights.

Regards,
Bob Zmudka



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RE: cable maximization - do you or don't you??

2003-07-08 Thread Bill Stumpf

Charles,
I applaud your integrity! You are right to insist on maximization of
cable placement when performing emissions testing. The ANSI document
does indeed call this out, and the cable placement, as well as the
peripheral equipment placement, should be maximized, of course while
staying within the boundaries of the ANSI C63.4 definition and typical
installation/setup of the EUT. As you know, the idea is to investigate
the worst case emissions from the system (EUT) within the typical
parameters of use of the EUT. Some laboratories do not do this because
it may be difficult and time-consuming, but they are doing you a
disservice. Continue to insist that your lab/OEM supplier follows the
ANSI C63 test setup and procedures.

William M Stumpf
DLS Electronics
166 South Carter St.
Genoa City WI 53128
ph: 262-279-0210
fx: 262-279-3630
email: bstu...@dlsemc.com



From: Charles Grasso [mailto:cgrassospri...@earthlink.net]
Sent: Sunday, July 06, 2003 3:54 PM
To: Emc-Pstc; charles.gra...@echostar.com
Subject: cable maximization - do you or don't you??



Hi all,

I have recently run into an issue with an OEM
supplier. The product that we are looking at
fails emissions after cable maximization.
In an informal study, I discovered that quite
a few labs don't seem to perform cable maximization
on a routine basis. ANSIC63 is quite clear on this
- the cables need to be maximized.

Is cable maximization a thing of the past - to
be written out - and test labs are maximizing
throughput rather than cables OR is is something
I should continue to insist on??

Comments will be gratefully accepted.
Charles Grasso
EchoStar Communicationa


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Re: New Approach vs WEEE/RoHS (EuE)

2003-07-08 Thread Neil Helsby

You will find the draft document at:

http://europa.eu.int/comm/enterprise/electr_equipment/eee/index.htm

Move down to the first inset paragraph Working 
paperDirectiveEco-design and click on this for the pdf document. It
is 18 pages long.

Regards,

Neil Helsby



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RE: New Approach vs WEEE/RoHS

2003-07-08 Thread John Allen

Nick 

The proposal was called Draft for a Proposal for a Directive of the
European Parliament and of the Council on establishing a framework for the
Eco-design of End Use Equipment, and was dated 09-10-2002.

There was a PDF (which I have) on the Commission website but I am not sure
whether it is still there. 

We also understand that the term End Use Equipment (EUE) has now been
amended to End User Products (EUP) - and that the scope may have changed
somewhat.

Regards

John Allen, 
Technical Consultant
EMC and Safety Engineering
ERA Technology Ltd.
Cleeve Road
Leatherhead 
Surrey KT22 7SA
UK

Tel: +44-1372-367025 (Direct)
   +44-1372-367000 (Switchboard)
Fax: +44-1372-367102

From: Nick Williams [mailto:nick.willi...@conformance.co.uk]
Sent: 07 July 2003 19:04
To: Neil Helsby
Cc: emc-p...@majordomo.ieee.org
Subject: Re: New Approach vs WEEE/RoHS



Neil,

Are there any public documents accessible on the WWW regarding the 
framework directive you mention?

Nick.



At 9:44 + 4/7/03, Neil Helsby wrote:
Joe,

I haven't seen any replies to this query so will just put in my ha-peth
(cent) for what it's worth.

  In order to declare conformity to New Approach Directives, the
manufacturer
  places the CE mark on the product and issues a Declaration of
Conformity.
  How does a manufacturer declare compliance to the WEEE/RoHS?

The RoHS Directive is basically a legal requirement that certain
substances are not used and is therefore just like other legislation. No
CE mark is necessary.

The WEEE Directive is more specific to specified industrial sectors
basically specifying how waste and its recovery is to be dealt with.
Again, no CE mark is necessary.

A Directive still under discussion is the Eco-design of End Use
Equipment. This is to present a framework for the integration of
environment aspects in the design and development and for setting
eco-design requirements This will require conformity assessment against
harmonised standards. Presumably a Technical File must be produced to
contain data that details environmental characteristics and performance
of a product, disposal at end-of-life, the ecological profile of the
product, etc... This WILL require to be CE marked to show conformance to
the requirements.

Regards,

Neil Helsby



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RE: cable maximization - do you or don't you??

2003-07-08 Thread Nagel, Michael

Hi All, 

my comment might not fit exactly into this thread but during
my tests I made the observation that on some EUTs the emissions
got worse when cables were removed. This happened mostly in the
frequency range beyond 300MHz but also below.

For the moment I have two theories on that:

There are cancellation effects on the critical frequencies with
the full cable configuration.

The fact that a cable is attached or not influences the common-mode
currents on the surface of the enclosure in direction and magnitude.
This makes some slots in the enclosure more or less efficient antennas
depending on the current in that area.


The first theory suits more for the low-frequency range (300MHz) in my 
eyes and the second one for the rest.

I am chewing on that one for a little while but neither have the time 
nor the means to explore these theories further.

I am curious on your comments. For the moment these are just theories ...

Any similar experiences?

Best regards,
Michael


 -Original Message-
 From: Charles Grasso [mailto:cgrassospri...@earthlink.net]
 Sent: Dienstag, 8. Juli 2003 05:59
 To: Ken Javor; Emc-Pstc; charles.gra...@echostar.com
 Subject: RE: cable maximization - do you or don't you??
 
 
 
 Hi Ken,
 
 Ahh the emissions analogy to the immunity tests? Hey - why not?
 After all there are plenty of conditions that arise NOT as an
 EUT problem but rather the artifical test environment that
 we use - i.e the OATS. We could then properly use a CALC
 without worrying about the cable radiation per se.
 
 Otts equation (derived from Banalis) is pretty accurate to
 half a wave length - the trick is what do you do after that?
 (Actually we have developed a correction factor here at
 Echostar..stay tuned..)
 
 -Original Message-
 From: owner-emc-p...@majordomo.ieee.org
 [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Ken Javor
 Sent: Monday, July 07, 2003 8:29 AM
 To: Charles Grasso; Emc-Pstc; charles.gra...@echostar.com
 Subject: Re: cable maximization - do you or don't you??
 
 
 
 An excellent opportunity to ask a question of list members, 
 especially those
 involved in standards writing.
 
 Why not calculate the cable conducted emission that would 
 result in radiated
 spec level compliance, and levy a cable conducted emission 
 requirement?
 
 Then OATS testing would not require cable manipulation, and 
 any out of spec
 conditions would result from test sample enclosure emissions.
 
  From: Charles Grasso cgrassospri...@earthlink.net
  Reply-To: Charles Grasso cgrassospri...@earthlink.net
  Date: Sun, 6 Jul 2003 13:53:40 -0700
  To: Emc-Pstc emc-p...@ieee.org, charles.gra...@echostar.com
  Subject: cable maximization - do you or don't you??
 
 
  Hi all,
 
  I have recently run into an issue with an OEM
  supplier. The product that we are looking at
  fails emissions after cable maximization.
  In an informal study, I discovered that quite
  a few labs don't seem to perform cable maximization
  on a routine basis. ANSIC63 is quite clear on this
  - the cables need to be maximized.
 
  Is cable maximization a thing of the past - to
  be written out - and test labs are maximizing
  throughput rather than cables OR is is something
  I should continue to insist on??
 
  Comments will be gratefully accepted.
  Charles Grasso
  EchoStar Communicationa
 
  ---
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  Technical Committee emc-pstc discussion list.
 
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 This 

Re: High Power Transorb

2003-07-08 Thread John Woodgate

I read in !emc-pstc that lfresea...@aol.com wrote (in 70.300239f4.2c3b4
b...@aol.com) about 'High Power Transorb' on Mon, 7 Jul 2003:
Transorb power rating is specified normalised to a 1 mS pulse, 
otherwise you would be right.


Well, I might be sort-of right anyway, if the OP didn't have a 1 ms
pulse and had not already taken the time into account
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


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RE: cable maximization - do you or don't you??

2003-07-08 Thread Charles Grasso

Hi Ken,

Ahh the emissions analogy to the immunity tests? Hey - why not?
After all there are plenty of conditions that arise NOT as an
EUT problem but rather the artifical test environment that
we use - i.e the OATS. We could then properly use a CALC
without worrying about the cable radiation per se.

Otts equation (derived from Banalis) is pretty accurate to
half a wave length - the trick is what do you do after that?
(Actually we have developed a correction factor here at
Echostar..stay tuned..)


From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Ken Javor
Sent: Monday, July 07, 2003 8:29 AM
To: Charles Grasso; Emc-Pstc; charles.gra...@echostar.com
Subject: Re: cable maximization - do you or don't you??



An excellent opportunity to ask a question of list members, especially those
involved in standards writing.

Why not calculate the cable conducted emission that would result in radiated
spec level compliance, and levy a cable conducted emission requirement?

Then OATS testing would not require cable manipulation, and any out of spec
conditions would result from test sample enclosure emissions.

 From: Charles Grasso cgrassospri...@earthlink.net
 Reply-To: Charles Grasso cgrassospri...@earthlink.net
 Date: Sun, 6 Jul 2003 13:53:40 -0700
 To: Emc-Pstc emc-p...@ieee.org, charles.gra...@echostar.com
 Subject: cable maximization - do you or don't you??


 Hi all,

 I have recently run into an issue with an OEM
 supplier. The product that we are looking at
 fails emissions after cable maximization.
 In an informal study, I discovered that quite
 a few labs don't seem to perform cable maximization
 on a routine basis. ANSIC63 is quite clear on this
 - the cables need to be maximized.

 Is cable maximization a thing of the past - to
 be written out - and test labs are maximizing
 throughput rather than cables OR is is something
 I should continue to insist on??

 Comments will be gratefully accepted.
 Charles Grasso
 EchoStar Communicationa

 ---
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Re: cable maximization - do you or don't you??

2003-07-08 Thread John Woodgate

I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in bb2f7186.2be2%ken.ja...@emccompliance.com) about 'cable
maximization - do you or don't you??' on Mon, 7 Jul 2003:

I don't think it is at all complicated, at least in principle.  Maybe a
devil will emerge out of some details I am missing...

It's a point worth discussing.

I don't see how an end-driven wire can radiate more efficiently than a tuned
half-wave dipole.  That model can be used to convert from field intensity at
X meters to peak current on the cable.

Agreed that it can't be more efficient, but it can be less efficient to
a nearly unlimited extent, so making that assumption can be very
pessimistic indeed.

For the case of multiple cables one could make various assumptions about the
additive effect of emissions at X meters:

A worst case assumption is that the same spectrum could appear on each cable
and add in phase at the measurement point.  This would require subtracting
from the previously determined single cable current limit the factor:

20*log (number of cables).

I think this is unreasonable, that the summing would be of random phase and
the factor to be subtracted from the single cable current limit ought to be

10*log (number of cables).

Agreed, as a first approximation.

I am not trying to say that this approach is precisely correct and should be
implemented as is.  I do think it would be interesting to make some cable
measurements using an absorbing clamp  and compare to the corresponding OATS
profile and draw some conclusions.

Yes, I think that is justified, now that you have raised the subject.
Unfortunately, many such proposals are never investigated because no-one
has the time, even if the costs can be handled.

I think we all look forward to your report of the first results. (;-)
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
Interested in professional sound reinforcement and distribution? Then go to 
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


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Re: EU Language Requirements

2003-07-08 Thread richhug...@aol.com
Bob,

Compliance with translation requirements for safety is a regulatory
requirement in many countries within the EU, but you are presumably not
talking safety for your software interface?

This means that primarily you are concerned with supplying a product that
carries out a particular function after your customer has interfaced with the
software in some way.  Perhaps for the US market you have menus for your
customers to follow and perhaps a help menu in case they get stuck?  Consider
that you were trying to sell two products having identical functionality in
the US marketplace, one was available in American English only whereas the
other was only available in Danish (or other language if you'd prefer): by
what percentage would the English product outsell the Danish one?  Even if the
English language product did not exist, how much of an uphill struggle would
it be to sell a Danish only product?   

Of course, in certain technical areas it may be that you could expect
customers to have a reasonable grasp of the English language, but that is
specific to your potential customer base and is something that you will need
to address in your marketing strategy.

You also ask about warrantees.  Here you need to look not only at legislation
dealing with language itself but also about legislation regarding implied
terms in contract.  In the consumer area at least there is legislation that
effectively null and voids unreasonable terms in contracts (such as exist when
you purchase a piece of software from a high-street shop and install it on
your PC at home).  However, if you wanted to include a limitation which (let
us say) is considered to be reasonable if written in the language of the
country concerned, then would it be worth the paper it was printed on if it
were in a foreign language - I rather suspect it wouldn't?  

Regards,

Richard Hughes
Safety Answers Limited



Monitoring Random ESD events

2003-07-08 Thread Eric Penne

I'm pretty new to the EMC scene and I need to monitor a product to see
what kind of ESD events it generates on its own.  The customer wants me to
attach my oscope to their sensors and see what kind of ESD voltages their
sensors see in daily operation.

I know that I don't want to directly connect the oscope to the sensors
while the machine is running.  I was trying to figure out a way to
isolate the signals on the sensors from the oscope but still get a value
that is useful.  I was thinking of some sort of current loop around the
sensor wires.  How would I correlate the current loop measurement to an
ESD voltage?

I'm probably not providing enough information but I'm not really sure what
information will be needed.

Thank you,
Eric Penne
epe...@ieee.org




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RE: Instrument Controller Software

2003-07-08 Thread Brian O'Connell
SR analyzers, at least the ones I have used, speak SCPI. I try to keep data
logging utilities as simple as possible, use ANSI C, hi-level SCPI commands to
control instruments, and send output to a file that can be accessed by more
than one program. 

For a Windoze box, it will probably be more reliable to block-dump
engineering-formatted data to a CSV file. Open and close the file for each
data block copy.

Data logging for  several hours on a WIndoze box is not reliable unless you
isolate the software modules using seperate threads for each major process.

luck, 
Brian 


-Original Message- 
From: John Cronin [ mailto:croni...@hotmail.com] 
Sent: Tuesday, July 08, 2003 11:29 AM 
To: emc-p...@majordomo.ieee.org 
Subject: Instrument Controller Software 

Hi 
I have a requirement to log the screens from a spectrum analyser over a period
of between one day and one week.  I have been using the DDDA software from
Stanford research with some success.

However, I need a slightly more sophisticated package that will allow me to
dump screens as plots at 15 minutes intervals over a prolonged period unto a
laptop using GPIB.

I envisage using an Advantest 3265 or HP 8562 analyzer 




Shipments into Japan

2003-07-08 Thread Gerald Tammi

I have recently been told that product going into Japan for sale must have
the importers name on the label and the imported MUST be registered with
METI (Ministry of Economy, Trade and Industry).

Has any one come up with this same requirement?
What constitutes and importer?

Gerald Tammi
Zoom Telephonics
Boston, MA



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RE: Monitoring Random ESD events

2003-07-08 Thread John Shinn

Eric:
First, do not attach your scope (via probes) to the EUT if it generates 
a static charge on its own.  First, it is possible to blow the front end 
of your scope, and secondly, a 10 Mohm impedance will probably 
be low enough that any charge cannot build-up to the level you want 
to measure.  

John Shinn, P.E.
Manager, Lab Operations
Sanmina-SCI


From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Eric Penne
Sent: Tuesday, July 08, 2003 1:38 PM
To: emc-p...@majordomo.ieee.org
Subject: Monitoring Random ESD events



I'm pretty new to the EMC scene and I need to monitor a product to see
what kind of ESD events it generates on its own.  The customer wants me to
attach my oscope to their sensors and see what kind of ESD voltages their
sensors see in daily operation.

I know that I don't want to directly connect the oscope to the sensors
while the machine is running.  I was trying to figure out a way to
isolate the signals on the sensors from the oscope but still get a value
that is useful.  I was thinking of some sort of current loop around the
sensor wires.  How would I correlate the current loop measurement to an
ESD voltage?

I'm probably not providing enough information but I'm not really sure what
information will be needed.

Thank you,
Eric Penne
epe...@ieee.org




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Re: Monitoring Random ESD events

2003-07-08 Thread brent.dew...@us.datex-ohmeda.com


If you can get near the sensors (1 inch), 3M makes a static field meter.
Their Model 718 is a non-contact device and has an analog output
proportional to the field for logging.

Best of luck,

Brent DeWitt




  
 
Eric Penne  
 
epe...@ieee.org To:
emc-p...@majordomo.ieee.org 
Sent by:  cc: 
 
owner-emc-pstc@majordom   Subject: Monitoring
Random ESD events 
o.ieee.org
 
  
 
  
 
08-07-03 02:38 PM 
 
Please respond to Eric   
 
Penne
 
  
 
  
 





I'm pretty new to the EMC scene and I need to monitor a product to see
what kind of ESD events it generates on its own.  The customer wants me to
attach my oscope to their sensors and see what kind of ESD voltages their
sensors see in daily operation.

I know that I don't want to directly connect the oscope to the sensors
while the machine is running.  I was trying to figure out a way to
isolate the signals on the sensors from the oscope but still get a value
that is useful.  I was thinking of some sort of current loop around the
sensor wires.  How would I correlate the current loop measurement to an
ESD voltage?

I'm probably not providing enough information but I'm not really sure what
information will be needed.

Thank you,
Eric Penne
epe...@ieee.org




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Re: Instrument Controller Software

2003-07-08 Thread lfresea...@aol.com
In a message dated 7/8/2003 4:57:55 PM Central Daylight Time,
croni...@hotmail.com writes:







Hi 



I have a requirement to log the screens from a spectrum analyser over a period
of between one day and one week.  I have been using the DDDA software from
Stanford research with some success.


However, I need a slightly more sophisticated package that will allow me to
dump screens as plots at 15 minutes intervals over a prolonged period unto a
laptop using GPIB.


I envisage using an Advantest 3265 or HP 8562 analyzer.


Can anyone point me in the right direction?


Mnay thanks





John Cronin







Hi John,

Schaffners Compliance 3 emissions package will do this for you. It has a lab
windows flavour to it so you basically write a flow chart of what you want to
do. What you describe would take about a half hour to set up.

If you'd like to know more perhaps we should chat offline.

Cheers,

Derek N. Walton
Owner L F Research EMC Design and Test Facility
Poplar Grove,
Illinois,  USA
www.lfresearch.com