Job Opening - Senior Telecom Test Engineer

[PGodfrey]

KTL is a leading provider of test services within the telecommunications and
electronics manufacturing arena. We currently have a position available at
our Dallas facility for a qualified Senior Telecom Test Engineer. The ideal
candidate will have experience in both digital and analog compliance testing
and standards for both the domestic and European markets. This position is
one of both supervisory and hands-on practical involvement.

For more information regarding this and other opportunities within KTL, and
who to contact please take a look at our website and check the careers link.

http://www.ktl.com/worldwide.htm

Thank you for taking a look.

Regards,

Phil Godfrey

Phillip Godfrey - Manager, Product Safety
KTL Dallas, Inc.
802, N.Kealy,
Lewisville,
Texas 75057-3136

Tel : (972) 436-9600
Fax: (972) 436-2667
http://www.ktl.com/

email : pgodf...@icomply.com

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Re: TNV-2 to SELV Spacing

[Robert Johnson]

The insulation type needed and conditions of use are described in IEC 60950
table 2G, probably basic (exceptions in 2.3.2)

For clearances, unless you know the voltages to be otherwise (e.g. proprietary
circuits), TNV2 (add in your SELV voltages) has a voltage up to 200Vp to earth
(M.3.1.2) and a transient rating of 800 V (2.10.3.3 note) so use table 2K (2H if
floating SELV), the row for 210 Vp and the column for  nominal <150 V.

For creepages, unless you know the voltages to be otherwise (e.g. proprietary
circuits), TNV2 (add in your SELV voltages) has a working voltage up to 120 Vdc
(2.10.4) so use table 2L, the row for 125 V.

If you plan to sell in Europe, throw all that out because you need to use the
values for supplementary insulation for mains voltages due to Norway and Sweden
(6.1.2.1 notes)

Bob



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RE: 61000-4-8 Ground Plane

[Gary McInturff]

I don't know either I am assuming that they are just trying to
standardize the test "cell" if you will. You're right the field of interest
is inside the loop and the external lobs shouldn't be a problem whether or
not the fringe with a ground plane or not, even if they did I think the
ability would exist to increase the field strength for the EUT to
compensate.
I suppose there is something obviously wrong with my assumption but
that wouldn't be the first time.
Gary
-Original Message-
From: rehel...@mmm.com [mailto:rehel...@mmm.com]
Sent: Friday, June 16, 2000 9:21 AM
To: michael.sundst...@nokia.com
Cc: emc-p...@majordomo.ieee.org
Subject: RE: 61000-4-8 Ground Plane





61000-4-8 is an immunity test. It totally immerses the EUT in a magnetic
field
at 50 Hz. I still don't know what the ground plane is for.




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Re: 61000-4-8 Ground Plane

[Barry Ma]

On Fri, 16 June 2000, rehel...@mmm.com wrote:
 
> Can someone explain to me why a ground plane is required in the test setup for
> EN 61000-4-8 (power frequency magnetic fields)?
> 
> Thanks,
> Bob Heller
> 3M Company
---

Bob,

Good question! The ground plane is described in the EN 61000-4-8 standard, but 
not used in many EMC testing labs. People cannot figure out the difference if 
using it in real test. However, there must be a reason to use it when the 
standard was written. 



Thanks.
Best Regards,
Barry Ma
ANRITSUwww.anritsu.com
Morgan Hill, CA 95037
Tel. 408-778-2000 x 4465
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RE: 61000-4-8 Ground Plane

[reheller]

61000-4-8 is an immunity test. It totally immerses the EUT in a magnetic field
at 50 Hz. I still don't know what the ground plane is for.




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RE: TNV-2 to SELV Spacing

[Mel Pedersen]

Current editions of UL 1950/CSA 22.2 No. 950 (3rd Ed) and EN 60950 (2nd Ed
4th Amd) would require BASIC INSULATION (see 6.2.1.2) between TNV-2 & SELV.

I believe that a working voltage of 150VDC (Max TNV + some left over on SELV
side) and 200Vpk (ringing) is generally accepted as the working voltage
between TNV-2 & SELV.  At least this works for the labs I talk to. (UL is a
bit different here, as TNV limits are lower).  150VDC would determine
CREEPAGE DISTANCE, 200Vpk CLEARANCE:

Table 6:  (CREEPAGE, 150VDC, MG III) = 1.6mm - for the US this may be
reduced to 1.5mm as the TNV limits are lower.
Table 5:  (CLEARANCE, 200Vpk, PD 2) = 0.9mm (Mains supply < 150Vrms)
Table 5:  (CLEARANCE, 200Vpk, PD 2) = 1.0mm (150Vrmsmailto:mpeder...@midcom-inc.com


-Original Message-
From: helmut.hi...@alcatel.de [mailto:helmut.hi...@alcatel.de]
Sent: Friday, June 16, 2000 1:34 AM
To: gary.mcintu...@worldwidepackets.com; emc-p...@ieee.org
Subject: AW: TNV-2 to SELV Spacing


Gary,
between TNV2 and PE (ground) the only requirement is functional insulation.

For max TNV2 (120Vdc) the following spacings apply:
clearance:  0,6mm (table 2K last column)
creepage:   0,6 up to 2,4mm depending on the PD and MG
(table 2L)
eg for PD 2 MG IIIa 1,5mm
relevant document: IEC 60950 3.ed 1999
best regards
helmut hintz

--
Von: Gary.McInturff / unix (gary.mcintu...@worldwidepackets.com)
An: emc-p...@ieee.org
Betreff: TNV-2 to SELV Spacing
Datum: Donnerstag, 15. Juni 2000 16:44


Temporarily without my standard, and need a spacing requirement.
Seems to me that over surface it was 1.4 mm or 1.0 mm through air, but it
also seems to me that it was contingent upon whether or not the secondary
was grounded or not. How about TNV-2 to ground?
As always there is no room, no time and we need to spin the board.
Thanks
Gary

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RE: Conversion program

[Kevin Robinson]

Here is the original E-mail from November 1999:

For those of you interested, there is a free conversion
program located at the following address:
http://www.joshmadison.com/software
   > 
After opening this site, go to CONVERT for a description. I
have found this program to be quite useful for conversion tasks between
different units, e.g. temperature, power, etc. Hopefully  you will find this
useful as well.
-Original Message-
From:   Hjálmar Árnason
[SMTP:hjal...@tnet.is]
Sent:   Friday, June 16, 2000 4:54 AM
To: emc-p...@majordomo.ieee.org
Subject:Conversion program



Hi everyone,

some months back there was an email going around
that 
had attached a conversion software i.e. converting
dB-that 
to dB-this and so on.
Is there anyone out there that can resend me this
program.

Thanks in advance..

Hjalmar.

STIKLA ehf
Hjalmar Arnason
Manager Technical Operations
Hlidarsmara 11
200 Kopavogi
Iceland.

hjal...@tetra.is

STIKLA ehf is a TETRA operator in Iceland and you
can
find us at www.tetra.is 

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61000-4-8 Ground Plane

[reheller]

Can someone explain to me why a ground plane is required in the test setup for
EN 61000-4-8 (power frequency magnetic fields)?

Thanks,
Bob Heller
3M Company



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Re: Bellcore GP-1089 emissions testing: LISN test setup

[Gregory Sperun]

Folks,
The original release of GR-1089 specified a 10 uF feedthrough for conducted
emissions. A subsequent revision of the document, GR-1089 Issue 2, December
1997, specified LISN's for conducted emissions in place of the feedthrough caps.



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Fwd:Re: Hong Kong, Brazil and India; EMC and Safety Requirem

[Jim Bacher]

forwarding for Harry...

Forward Header_
Subject:Re: Hong Kong, Brazil and India; EMC and Safety Requirements
Author: "Harry Yeung" 
List-Post: emc-pstc@listserv.ieee.org
Date:   6/16/00 9:23 AM

Dear Mr Merguerian
Your enquiry is related to us by Mr Loop.  We are happy to be of service to
you.
We can help you for the product approvals in Hong Kong and China.  In order
that we can answer your questions, we need to know what product(s) you are
going to ship to these places.  Pls give us that information and we will
reply to you in due course.
Rgds
Harry Yeung

- Original Message -
From: "Loop, Robert" 
To: "Peter Merguerian" 
Cc: ; 
Sent: Friday, June 16, 2000 1:59 AM
Subject: RE: Hong Kong, Brazil and India; EMC and Safety Requirements


> Peter:
>
> For EMC and Safety for Hong Kong and PRC, please contact Mr. Harry Yeung
of
> the Hong Kong Standards and Testing Centre.  His e-mail address is
> harry_ye...@hkstc.com.
>
> I recently had the opportunity to meet Mr. Yeung and was most impressed
with
> his extensive knowledge.
>
> My regrets that I cannot help you with Brazilian and Indian requirements.
> Sincerely,
> Robert Loop
> Engineering Supervisor
> Wyle Laboratories
> Product Safety
> ph - (256) 837-4411 x313
> fax- (256) 721-0144
> e-mail: rl...@hnt.wylelabs.com
>
>
> > --
> > From: Peter Merguerian[SMTP:pmerguer...@itl.co.il]
> > Reply To: Peter Merguerian
> > Sent: Thursday, June 15, 2000 9:53 AM
> > To: emc-p...@majordomo.ieee.org
> > Subject: Hong Kong, Brazil and India; EMC and Safety Requirements
> >
> >
> > Hello All!
> >
> > Anyone can help with the safety & emc requirements in the countries
> > specified above?
> >
> > Thanks
> > Peter Merguerian
> > Managing Director
> > Product Testing Division
> > I.T.L. (Product Testing) Ltd.
> > Hacharoshet 26, POB 211
> > Or Yehuda 60251, Israel
> >
> > Tel: 972-3-5339022 Fax: 972-3-5339019
> > e-mail: pmerguer...@itl.co.il
> > website: http://www.itl.co.il
> >
> >
> >
> >

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Conversion program

[Hjálmar Árnason]

Hi everyone,

some months back there was an email going around that 
had attached a conversion software i.e. converting dB-that 
to dB-this and so on.
Is there anyone out there that can resend me this program.

Thanks in advance..

Hjalmar.

STIKLA ehf
Hjalmar Arnason
Manager Technical Operations
Hlidarsmara 11
200 Kopavogi
Iceland.

hjal...@tetra.is

STIKLA ehf is a TETRA operator in Iceland and you can
find us at www.tetra.is 

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AW: TNV-2 to SELV Spacing

[Helmut . Hintz]

Gary,
between TNV2 and PE (ground) the only requirement is functional insulation.

For max TNV2 (120Vdc) the following spacings apply:
clearance:  0,6mm (table 2K last column)
creepage:   0,6 up to 2,4mm depending on the PD and MG
(table 2L)
eg for PD 2 MG IIIa 1,5mm
relevant document: IEC 60950 3.ed 1999
best regards
helmut hintz

--
Von: Gary.McInturff / unix (gary.mcintu...@worldwidepackets.com)
An: emc-p...@ieee.org
Betreff: TNV-2 to SELV Spacing
Datum: Donnerstag, 15. Juni 2000 16:44


Temporarily without my standard, and need a spacing requirement.
Seems to me that over surface it was 1.4 mm or 1.0 mm through air, but it
also seems to me that it was contingent upon whether or not the secondary
was grounded or not. How about TNV-2 to ground?
As always there is no room, no time and we need to spin the board.
Thanks
Gary

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RE: SAE testing

[Peter Merguerian]

Dear All,

Last year I had an ITE product for use in vehicles Listed under UL1950. 



At 13:11 15/06/2000 -0500, Loop, Robert wrote:
>
>Cyril:
>
>I don't believe there is a safety (UL) requirement for ITE equipment that
>will be installed in a vehicle.
>
>I have been writing a test plan for a customer that requires extensive
>testing to SAE J1455 and J1113 and there is no "safety" involved.  It is
>basically environmental, transient voltage, immunity and emissions based
>testing.
>
>If you need more specifics on individual tests contained in those two
>standards, please contact me directly.
>
>Sincerely,
>Robert Loop
>Engineering Supervisor
>Wyle Laboratories 
>Product Safety
>ph - (256) 837-4411 x313
>fax- (256) 721-0144
>e-mail: rl...@hnt.wylelabs.com
>
>
>> --
>> From:Binnom, Cyril A[SMTP:binno...@ems-t.com]
>> Reply To:Binnom, Cyril A
>> Sent:Thursday, June 15, 2000 10:23 AM
>> To:  emc-pstc
>> Subject: SAE testing
>> 
>> 
>> Group,
>> 
>> I have an In-Vehicle Computer (ITE equipment) that will be implemented
>> into
>> heavy duty trucks. I am unfamiliar with SAE requirements and only have
>> been
>> told that I will have to be compliant to J1455. I am looking for some
>> clarification on if this is the correct standard,  (if it is not then what
>> is) and if this is a compliance issue that has to be addressed or if
>> testing
>> is a matter of choice.
>> 
>> Thank you in advance for your help 
>> 
>> Cyril A. Binnom Jr.
>> EMI/EMC Approvals Engineer
>> (770) 447-4224 Ext.3240
>> (770) 447-6928 Fax
>> e-mail binno...@lxe.com
>> 
>> Visit Our Website at:
>> http://www.lxe.com
>>
>> 
>> ---
>> This message is from the IEEE EMC Society Product Safety
>> Technical Committee emc-pstc discussion list.
>> 
>> To cancel your subscription, send mail to:
>>  majord...@ieee.org
>> with the single line:
>>  unsubscribe emc-pstc
>> 
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>>  Michael Garretson:pstc_ad...@garretson.org
>> 
>> For policy questions, send mail to:
>>  Richard Nute:   ri...@ieee.org
>> 
>> 
>
>---
>This message is from the IEEE EMC Society Product Safety
>Technical Committee emc-pstc discussion list.
>
>To cancel your subscription, send mail to:
> majord...@ieee.org
>with the single line:
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>
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>
>For policy questions, send mail to:
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>
>
Peter Merguerian
Managing Director
Product Testing Division
I.T.L. (Product Testing) Ltd.
Hacharoshet 26, POB 211
Or Yehuda 60251, Israel

Tel: 972-3-5339022 Fax: 972-3-5339019
e-mail: pmerguer...@itl.co.il
website: http://www.itl.co.il 






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Questions about setting up standard reference EM field

[Yao]

hi,all:

I am getting into a project to setup standard reference EM field from  18 GHz 
to 40 GHz. 
1.Could anyone tell me the difficulty and difference between that and below the 
18 GHz?
2.Is there any new method?
3.What special advice and instruments are needed?
4.Could anyone help me get the document? It is "Generating standard reference 
electromegnetic field in the NIST anechoic chamber:0.2-40GHz",NIST Technical 
Note 1335,March,1990.

Thanks in advance.Any advice and suggestions would be appreciated.

Lucian Yau
Email:y...@ht.rol.cn.net;ya...@126.com