Looking for South Africa ICASA telecom license holder

[Daniel Roman]

All,

 

I am seeking a resident company in South Africa that will act as an agent to
hold our terminal equipment licenses from ICASA.  Does anyone know of any that
they might recommend?  An Internet search (10 pages deep) did not return
anything but I’d rather use someone that someone else has experience with
anyway!

 

Thank you in advance.

 


-- 
Dan Roman, N.C.E.
Product Regulatory Engineer
Dialogic, Inc.
1515 State Rt. 10
Parsippany, NJ 07054-4538
*mailto:dan.ro...@dialogic.com  
(Voice: +1 973-967-6485  Fax: +1 973-967-6262
Intranet: http://compliance.eicon.com/  
Internet: http://www.dialogic.com  

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Re: Shielding setup for conducted emission prescans

[pat.lawler]

Hi David, 

I had that problem once (broadcast stations were located a few miles away).  I
was able to eliminate it by simply connecting a strip of copper tape from the
spectrum analyzer chassis to the groundplane used for conducted EMI
measurements. 

Pat Lawler
EMC Engineer
SL Power Electronics Corp.

emc-p...@ieee.org wrote on 09/30/2008 06:08:19 AM:
> I do conducted emission prescans, but do not have a shielded room.  
> A few AM radio stations come in loud and clear.  I was considering 
> building a wooden frame and covering it with mesh to shield the 
> setup.  Our products are mostly smaller than a breadbox.  Any 
> suggestions would be appreciated!

> Thanks,
> David
> 
> David Gelfand
> Conformity Specialist
> Kontron Canada Inc.
> 616 Curé Boivin
> Boisbriand QC
> Canada J7G 2A7
> 450 437 5682 x2449
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RE: Shielding setup for conducted emission prescans

[Garnier, David S (GE Healthcare)]

Hi,
 
As a sanity check of your shielded enclosure and LISN, conduct your CE test 
without the EUT on, you will know right away if you have a leakage problem.
 
Regards,
 
Dave Garnier
 

David Garnier 
e GE HealthCare 
___ 

David S. Garnier 
Quality Assurance Technician 
Quality-Controls-EMC 
3000 N. Grandview Ave - M/S W-618 
Waukesha, Wi. 53188 
Tel: 262.312.7246 
Cel:  414.899.7580 

 

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Re: Safety Testing Training

[John Woodgate]

In message <000e01c9230f$bfb48450$d600a...@tamuracorp.com>, dated Tue, 
30 Sep 2008, Brian O'Connell  writes:


>Develop a good working relationship with senior agency engineers.

VERY good advice indeed.
>
>Talk to the safety/compliance engineers of your component suppliers - 
>if you buy component power supplies, specifically strive to develop a 
>good relationship with your power supply safety engineers.

Also very good.
>
>If your employer has other safety engineers, ask many questions about 
>both the 'how' and 'why' of Type Tests.

You will learn'how' in great detail. 'Why' is far less certain: many 
tests have grown up as 'lore' over the years. The IEC 62368 project is 
an attempt to replace lore with logic, but it's proving a very rough 
road indeed.
>
>Expect positions, that perform only safety engineering, to eventually 
>be outsourced.

.. followed by expensive problems and a reconsideration.

You can only 'design in' safety unless you want to lose lots of money by 
imposing it on 'finished' designs. This means that your design engineers 
need to know the safety standard(s) in depth. As the resident safety 
expert, you **DAY-TO-DAY** train the designers, do the tests and make 
sure that the designers did a good job. Outsourcing that function is a 
recipe for disaster.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Either we are causing global warming, in which case we may be able to stop it,
or natural variation is causing it, and we probably can't stop it. You choose!
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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Re: Shielding setup for conducted emission prescans

[John Woodgate]

In message , dated Tue, 30 
Sep 2008, Ken Javor  writes:


>the rather large chicken wire interstices of an inch or more.

Yes, well, you see, you have bigger chickens in USA - about 2.54 times 
bigger than ours. (;-)
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Either we are causing global warming, in which case we may be able to stop it,
or natural variation is causing it, and we probably can't stop it. You choose!
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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RE: 315 MHz

[Gert Gremmen]

Right , virtually all automotive keylocks in the EC use 433 Mhz.


Regards,

Ing. Gert Gremmen




ce-test, qualified testing bv




Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens
rehel...@mmm.com
Verzonden: Tuesday, September 30, 2008 4:39 PM
Aan: emc-p...@ieee.org
Onderwerp: 315 MHz

Is 315 MHz a useable frequency for a short range device for Europe? I
can't
find it in 70-03. It is a key fob frequency for unlocking car doors.
Does
Europe use 433 MHz for this?

Thanks,
Bob Heller
3M Company, St. Paul, MN
55107-1208
Tel:  651- 778-6336
Fax:  651-778-6252

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RE: Safety Testing Training

[Brian O'Connell]

I suffered similar trauma almost 10 years past when I went from a
happy and simple-minded code monkey to a confused and amazed
safety/compliance guy (and the 'confused' condition is a
permanent change).

Attend the annual PSES symposium, then stay for one of the UL
courses.

Read all back issues of the IEEE PSES newsletter.

Do not limit your studies to 1010; also, this standard has a few
problems. Look at some CDFs for your company's existing
products - note the ratings and the specific standards required
for components - become familiar with these.

Be familiar with electric codes and how they will affect regional
use of your product.

Develop a good working relationship with senior agency engineers.

Talk to the safety/compliance engineers of your component
suppliers - if you buy component power supplies, specifically
strive to develop a good relationship with your power supply
safety engineers.

If your employer has other safety engineers, ask many questions
about both the 'how' and 'why' of Type Tests.

Expect positions, that perform only safety engineering, to
eventually be outsourced.

luck,
Brian


From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of
John Harrington
Sent: Tuesday, September 30, 2008 7:38 AM
To: emc-p...@ieee.org
Subject: Safety Testing Training

Hi All

After nearly 20 years solely in the realm of EMC testing my role
has changed to include product safety testing.  I have a very
steep learning curve ahead of me.

Can anyone suggest or recommend training courses and / or texts?
Something with a strong practical foundation.  My focus will be
61010.

If your company offers such training feel free to contact me
offline.

A journey of a thousand miles starts with one step. it's always
of benefit if that step is in the right direction!

Thanks

John Harrington
Compliance Engineer
Keithley Instuments, Inc.
jharring...@keithley.com

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315 MHz

[reheller]

Is 315 MHz a useable frequency for a short range device for Europe? I can't
find it in 70-03. It is a key fob frequency for unlocking car doors. Does
Europe use 433 MHz for this?

Thanks,
Bob Heller
3M Company, St. Paul, MN
55107-1208
Tel:  651- 778-6336
Fax:  651-778-6252

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Safety Testing Training

[John Harrington]

Hi All

 

After nearly 20 years solely in the realm of EMC testing my role has changed
to include product safety testing.  I have a very steep learning curve ahead
of me.

 

Can anyone suggest or recommend training courses and / or texts?  Something
with a strong practical foundation.  My focus will be 61010.

 

If your company offers such training feel free to contact me offline.

 

A journey of a thousand miles starts with one step… it’s always of benefit
if that step is in the right direction!

 

Thanks 

 

John Harrington

Compliance Engineer

Keithley Instuments, Inc.

jharring...@keithley.com

 


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RE: Shielding setup for conducted emission prescans

[Gert Gremmen]

Most important is the filtered AC connection.
Create a good ground point of a wiiide connection
and connect it to your required reference plane = ground of
receiver.
Other wires connected to the EUT are in general too short to generate 
substantial
signal on 50 ohm. While we do carry out these tests in our
shielded room, I never found ANY difference between
door open and door closed. I remember in the past that conducted measurements
ware only causing me headaches with measurements on location, where
no filtered ac was available.

Regards,

Ing. Gert Gremmen



ce-test, qualified testing bv




Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens Price, Edward
Verzonden: Tuesday, September 30, 2008 4:20 PM
Aan: emc-p...@ieee.org
Onderwerp: RE: Shielding setup for conducted emission prescans

Don't forget to include a low-pass filter for the AC powerline where it enters 
your shielded work area.

Another alternative might be to find a used TEM or GTEM cell. It will give you 
shielding, plus you can also do radiated emission and immunity pre-scans too.
 

Ed Price
ed.pr...@cubic.com WB6WSN
NARTE Certified EMC Engineer & Technician
Electromagnetic Compatibility Lab
Cubic Defense Applications
San Diego, CA  USA
858-505-2780 (Voice)
858-505-1583 (FAX)
Military & Avionics EMC Is Our Specialty
 

> -Original Message-
> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf 
> Of Ken Javor
> Sent: Tuesday, September 30, 2008 6:53 AM
> To: Untitled
> Subject: Re: Shielding setup for conducted emission prescans
> 
> I'm going to go out on a limb here and disagree with Mr. 
> Woodgate. Not that what he said was wrong, just overkill. If 
> all you are worried about is conducted emissions from 150 kHz 
> to 30 MHz, and if the AM BCB is the only licensed high power 
> transmitter of concern (TV BCB starts at 54 MHz, and FM at 88 
> MHz), then all you need is some chicken wire stretched over 
> that 2x4 frame.  I wouldn't even worry about soldering or 
> otherwise making an ohmic connection between different 
> sections of the chicken wire, just assure yourself plenty of 
> overlap. And make sure the door closes well and the metallic 
> cladding goes all the way around from the outside to the 
> edges and at least a little on the inside, and make sure the 
> door frame is likewise coated and that coating makes a decent 
> connection to the chicken wire. That is all you will need - 
> no fingerstock, no gasket of any kind. AM is such a long 
> wavelength it can't get through even the rather large chicken 
> wire interstices of an inch or more.
>  
> Ken Javor
> 
> Phone: (256) 650-5261
> 
> 
> > From: "Gelfand, David" 
> > Date: Tue, 30 Sep 2008 09:08:19 -0400
> > To: 
> > Conversation: Quiet PC for RE
> > Subject: Shielding setup for conducted emission prescans
> > 
> > Hi all,
> > 
> > I do conducted emission prescans, but do not have a 
> shielded room.  A 
> > few AM radio stations come in loud and clear.  I was considering 
> > building a wooden frame and covering it with mesh to shield 
> the setup.  
> > Our products are mostly smaller than a breadbox.  Any 
> suggestions would be appreciated!
> > 
> > Thanks,
> > 
> > David
> > 
> >   
> > David Gelfand
> > Conformity Specialist
> > Kontron Canada Inc.
> > 616 Curé Boivin
> > Boisbriand QC
> > Canada J7G 2A7
> > 450 437 5682 x2449

-

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RE: Shielding setup for conducted emission prescans

[Price, Edward]

Don't forget to include a low-pass filter for the AC powerline where it enters 
your shielded work area.

Another alternative might be to find a used TEM or GTEM cell. It will give you 
shielding, plus you can also do radiated emission and immunity pre-scans too.
 

Ed Price
ed.pr...@cubic.com WB6WSN
NARTE Certified EMC Engineer & Technician
Electromagnetic Compatibility Lab
Cubic Defense Applications
San Diego, CA  USA
858-505-2780 (Voice)
858-505-1583 (FAX)
Military & Avionics EMC Is Our Specialty
 

> -Original Message-
> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf 
> Of Ken Javor
> Sent: Tuesday, September 30, 2008 6:53 AM
> To: Untitled
> Subject: Re: Shielding setup for conducted emission prescans
> 
> I'm going to go out on a limb here and disagree with Mr. 
> Woodgate. Not that what he said was wrong, just overkill. If 
> all you are worried about is conducted emissions from 150 kHz 
> to 30 MHz, and if the AM BCB is the only licensed high power 
> transmitter of concern (TV BCB starts at 54 MHz, and FM at 88 
> MHz), then all you need is some chicken wire stretched over 
> that 2x4 frame.  I wouldn't even worry about soldering or 
> otherwise making an ohmic connection between different 
> sections of the chicken wire, just assure yourself plenty of 
> overlap. And make sure the door closes well and the metallic 
> cladding goes all the way around from the outside to the 
> edges and at least a little on the inside, and make sure the 
> door frame is likewise coated and that coating makes a decent 
> connection to the chicken wire. That is all you will need - 
> no fingerstock, no gasket of any kind. AM is such a long 
> wavelength it can't get through even the rather large chicken 
> wire interstices of an inch or more.
>  
> Ken Javor
> 
> Phone: (256) 650-5261
> 
> 
> > From: "Gelfand, David" 
> > Date: Tue, 30 Sep 2008 09:08:19 -0400
> > To: 
> > Conversation: Quiet PC for RE
> > Subject: Shielding setup for conducted emission prescans
> > 
> > Hi all,
> > 
> > I do conducted emission prescans, but do not have a 
> shielded room.  A 
> > few AM radio stations come in loud and clear.  I was considering 
> > building a wooden frame and covering it with mesh to shield 
> the setup.  
> > Our products are mostly smaller than a breadbox.  Any 
> suggestions would be appreciated!
> > 
> > Thanks,
> > 
> > David
> > 
> >   
> > David Gelfand
> > Conformity Specialist
> > Kontron Canada Inc.
> > 616 Curé Boivin
> > Boisbriand QC
> > Canada J7G 2A7
> > 450 437 5682 x2449

-

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Re: Shielding setup for conducted emission prescans

[Ken Javor]

I'm going to go out on a limb here and disagree with Mr. Woodgate. Not that
what he said was wrong, just overkill. If all you are worried about is
conducted emissions from 150 kHz to 30 MHz, and if the AM BCB is the only
licensed high power transmitter of concern (TV BCB starts at 54 MHz, and FM
at 88 MHz), then all you need is some chicken wire stretched over that 2x4
frame.  I wouldn't even worry about soldering or otherwise making an ohmic
connection between different sections of the chicken wire, just assure
yourself plenty of overlap. And make sure the door closes well and the
metallic cladding goes all the way around from the outside to the edges and
at least a little on the inside, and make sure the door frame is likewise
coated and that coating makes a decent connection to the chicken wire. That
is all you will need - no fingerstock, no gasket of any kind. AM is such a
long wavelength it can't get through even the rather large chicken wire
interstices of an inch or more.
 
Ken Javor

Phone: (256) 650-5261


> From: "Gelfand, David" 
> Date: Tue, 30 Sep 2008 09:08:19 -0400
> To: 
> Conversation: Quiet PC for RE
> Subject: Shielding setup for conducted emission prescans
> 
> Hi all,
> 
> I do conducted emission prescans, but do not have a shielded room.  A few AM
> radio stations come in loud and clear.  I was considering building a wooden
> frame and covering it with mesh to shield the setup.  Our products are mostly
> smaller than a breadbox.  Any suggestions would be appreciated!
> 
> Thanks,
> 
> David
> 
>   
> David Gelfand
> Conformity Specialist
> Kontron Canada Inc.
> 616 Curé Boivin 
> Boisbriand QC
> Canada J7G 2A7
> 450 437 5682 x2449
> 
> -
> 
> This message is from the IEEE Product Safety Engineering Society
> emc-pstc discussion list.Website:  http://www.ieee-pses.org/
> 
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Re: Shielding setup for conducted emission prescans

[John M Woodgate]

In message , 
"Gelfand, David"  writes
>I do conducted emission prescans, but do not have a shielded room.  A 
>few AM radio stations come in loud and clear.  I was considering 
>building a wooden frame and covering it with mesh to shield the setup. 
>Our products are mostly smaller than a breadbox.  Any suggestions would 
>be appreciated!

These 'rabbit hutches' have been used for years. Use mesh with holes 
less that about 1 cm diameter and solder all joints between panels. You 
need ingenuity to construct a door that maintains the screening. Think 
'sliding door'.

If you use 2 layers of mesh, one on the outside of the frame and one on 
the inside, the screening can be quite effective.

Another possibility is a disused cold room, for rather larger EUTs.
-- 
This is my travelling signature, adding no superfluous mass.
John M Woodgate

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Shielding setup for conducted emission prescans

[Gelfand, David]

Hi all,

I do conducted emission prescans, but do not have a shielded room.  A few AM 
radio stations come in loud and clear.  I was considering building a wooden 
frame and covering it with mesh to shield the setup.  Our products are mostly 
smaller than a breadbox.  Any suggestions would be appreciated!

Thanks,

David

  
David Gelfand
Conformity Specialist
Kontron Canada Inc.
616 Curé Boivin 
Boisbriand QC
Canada J7G 2A7
450 437 5682 x2449 

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