After you calm down, consider this:
Many fab vendors don't analyze the USE of the board they are building,
nor do they know what frequencies the product will operate at, they just
see what is listed on the fab drawing. If they see what they consider a
typical build, and find it easier to use a different prepreg or whatever,
and casually ask if it matters, it is up to the designer to say
"YES, IT MATTERS".
You can't call them incompetent for asking.
ever considered decaf?
Jack
|---------+---------------------------------->
| | JaMi Smith |
| | <[log in to unmask]
| | T> |
| | Sent by: |
| | DesignerCouncil |
| | <DesignerCouncil@listse|
| | rv.ipc.org> |
| | |
| | |
| | 06/07/2003 02:00 AM |
| | Please respond to |
| | "(Designers Council |
| | Forum)"; Please respond|
| | to JaMi Smith |
| | |
|---------+---------------------------------->
>---------------------------------------------------------------------------------------------------------|
| |
| |
| |
| |
|To: [log in to unmask] |
|cc: |
| |
| |
| |
| Subject: Re: [DC] Core thickness/emissions |
>---------------------------------------------------------------------------------------------------------|
Caterpillar: Confidential Green Retain Until: 07/07/2003
Retention Category: G90 -
Information and Reports
Eric,
Unfortunately, it is not a joke.
I was just about to say that you obviously do not have any concept of what
emissions testing is all about, either practically or legally, but then I
looked at your email address and realized that you really do understand
what is going on here, and appear to just be making light of it.
It is not just a question of simply radiating interfering signals when you
are dealing with a cell phone company that makes an RF Transmitter that
people hold up to their heads.
It also appears that you may have never spent long hours in emissions
testing, trying to qualify a design, only to have to redesign it and
requalify it after you have made a large production run that need to be
scrapped, just because of some stupid idiot like the guy at the board house
in this particular case, who probably just didn't have the right material
in stock, or worse yet, had some extra material he just wanted to get rid
of. This guy really does need to be called on the carpet.
I don't want this idiot making any boards for me, and I really don't think
that you want him making any boards for you.
I want to know just who he is and who he works for, so that I do not make
the mistake of sending him any business.
This kind of incompetence is a problem in our industry, and we will never
correct it by ignoring it or sugar coating it.
Yes, incompetence is the correct word.
I am sorry if I am calling a spade a spade.
Why am I making an issue out of this? Because the average designer does not
know what a monumental blunder something like this is.
This is important, and it is important that anyone who is out there
designing boards knows that it is important, even if he does not totally
understand it.
That's why it should not be sugar coated.
That's why I am being so polite.
I am sorry if you are offended, but once again, this is not a joke.
JaMi
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