An interesting issue arose today, in reviewing a product. I
thought I'd share the joy.
Consider a garden variety piece of ITE with and appliance
inlet/EMI filter combination and a PE bonding conductor from
an EMI filter terminal to a stud pressed into the chassis.
The area around the stud does
Hi Fred,
Brent is correct in that Rogers made such capacitors, probably about 15 years
ago, or so. It was a
novel idea that attempted to provide some decoupling to a design that could
not accommodate it
otherwise. I believe that with the advent of generally better PWB designs, the
need for such
Tuesday, April 13th, 2004
"EMC Testing of Substation Products "
Jerry Ramie
ARC Technical Resources, Inc.
Details:
- The Presentation, "EMC Testing of Substation Products," concerns the EMC
testing requirements for products that are installed in Power Generation or
Substation plants h
I suspect there may be some saw dust is there. Rogers made laminated
bus bars that gave a distributed capacitance effect. They were
expensive and difficult to engineer and install. The same effect can be
achieved at a lower cost be using a multilayer PCB. (This probably
explains why they ar
In the old days, you could buy a laminated film bypass capacitor that soldered
under a through-hole DIP, connecting only to the corner power pins. Somewhere
in the dust bin of my brain I thought they were made by Rogers, but they don't
have anything like that now. Does anyone know if such beasts
Got it figured out. I found a manual at Agilent. Apparently the memory card is
not used to transfer the screen dump to a PC. I suppose I will have to use the
HP-IBM.
Dave Cuthbert
-Original Message-
From: drcuthbert
Sent: Monday, April 12, 2004 10:47 AM
To: emc-p...@major
Got the correct model number this time.
-Original Message-
From: drcuthbert
Sent: Monday, April 12, 2004 10:46 AM
To: emc-p...@majordomo.ieee.org
Subject:
I have an HP 8594E with no manual. Does anyone know what type of memory card
it uses?
Dave Cuthbert
I have an HP 8753E with no manual. Does anyone know what type of memory card
it uses?
Dave Cuthbert
Make sure the laptop is not the source of the problem. Connect your 1 meter
cable to the laptop, leave the other end open, and then measure your
emissions.
Note that a 1 meter cable is just about a quarter-wave monopole antenna at
72 MHz (good radiation efficiency).
Don Borowski
Schweitzer
Scott,
I don't have complete answers for you; but I do have some tidbits.
With regard to layer to layer spacing of hazardous (Primary Power)
traces: Rich Hughes has already replied, correctly, that this is a case
of distance through insulation, not creepage or clearance, which is
through air.
I read in !emc-pstc that Li Di wrote (in
<20040412091633.76599.qm...@web15405.mail.cnb.yahoo.com>) about 'surge
test problem about IEC61000-4-5' on Mon, 12 Apr 2004:
>I have two questions for surge test of IEC61000-4-5. Please help me.
>Precondition: We have only one product to be tested. Strict
Hi, list
I have two questions for surge test of IEC61000-4-5. Please help me.
Precondition: We have only one product to be tested. Strictly to say, two
products are needed. But for heavy or complicated and expensive product, it is
very difficult to provide two samples at the same time. The signal
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