Robert,
My experience has been that separating logic ground from the
D-sub shell on a plug-in card is not necessarily a good
idea. When you evaluate this card, please check it not only
on a system you know is a good performer for
ill,
And, having worked his evil will,
Turned quick away from on our sill
To some dank fen or misty hill;
He fled. And that's the story still!
Cortland Richmond
__ Reply Separator
Thanks for the word, Dave. I will know not to rely on the
printed material they supply, then. Sic transit tyrannosaurus,
right?
Cortland
__ Reply Separator _
Subject: Re: C-Tick mark
Author: Dave
Paul,
I too have looked at consumer grade equipment with an eye towards EMI
measurement. I have the ICOM R7000 (modified) and R7100, as well as Yupiteru
7100 and AOR AR8000 handheld scanners, plus the usual amateur radio handheld
transceivers, and I have made some use of all of
Heber,
I have zero experience or training in X-ray technology
(aside form what's in the physics books about Coolidge
tubes) but I'd think you could quantify transparency as 10
log P1/P2 where P1 is tube power needed for a given flux
I will have to go back to my records, in which I have a copy of the
FCC's NPRM setting up Class A and B limits, but as I recall, limits were
established by reference to the response of radio and television users
to known levels of radio noise. Also, impulses of known energy and PRF
This is also my last day at my present location, though I'll continue
in the list from my Compuserve account while searching.
Part of the confusion, I think, is that the Rulemaking says labels shown
replace existing labels, without clearly discriminating between Class A and
Class B. It is not clear that the intent was only to replace the Class B
label, although the text is contains actions evidently meant to qualify
Tony,
Radiated immunity tests set up a situation where only the unloaded
field is known. You're correct we cannot know for sure what is
actually getting into the EUT. If we had to know what current was
actually entering the ports we would need to monitor it
96 13:18:18 EST
From: Cortland Richmond 72146@compuserve.com
To: IEEE PSTMC emc-p...@ieee.org
Subject: Re: Shiep rules
Message-ID: 961222181817_72146.373_fhc1...@compuserve.com
Sender: owner-emc-p...@majordomo.ieee.org
Precedence: bulk
Reply-To: Cortland Richmond 72146@compuserve.com
X
While not losing sight of the reason why regulations exist,
let's also remember that if we don't participate in making
them, we can only complain afterwards about their impact. I
have participated in the FCC's comment process on several
Chris,
Here my natural cynicism comes out...
In this business we all get cynical.
The reduction in Electronic Fog in our universe is a secondary effect
Here we disagree. CISPR-12 was based on actual interference tests using real
people as subjects. The standard, which was
Chris,
The blame for standards can be assessed everywhere. But you posted:
...how we stood by and let the power generating industry make the
consumer responsible for the supply quality.
The problem here is that the industry can't control what we hang on the line.
Remember Tungar (TM)
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