Gary (and others): I have the same recollection vis-a-vis the VDE
COnducted emisions requirements.
Thank you
Charles Grasso
(Capn Hook)
--
From: Gary McInturff[SMTP:gmcintu...@packetengines.com]
Sent: Friday, December 04, 1998 2:12 PM
To: rehel...@mmm.com; Muriel
Dear group,
The use of ground choke in conducted measurements was specified in
Verfügerung 1046/1982 when testing to comply with VDE 0871 if the
measured noise was closer to the limit than 5 dB.
This second measurement must then also comply with the limit.
The value of this ground conductor
Cortland:
Very good point about the coax. Very low loss coax can be very expensive; I
recall a comparison I did a couple of years ago where I need very low loss 7
meter cable useable up to 18 GHz. A Gore cable cost around $2500, a Storm cable
was about $1100, and the cable I bought, United
Jim:
I typically pay about US$300 to $400per antenna calibration. I get my LISN's
calibrated for $100 each, but only if I send in at least 4 units as a batch.
Remember that the actual work of calibration is only part of the cost. There's
the printed data stuffed in a cute plastic liner, not to
I have seen three adapter situations which are somewhat reasonable.
The first is for a product with an IEC 320 C8 inlet.
The coiled power cord was IEC 320 C7 to C8, with molded adapters from C7 to
North American, Europlug and Australian pins. Cord and adapters were a UL
listed kit, don't remember
Keep in mind a couple special conditions:
In some medical areas like operating rooms isolating transformers are used, in
which case normal operation is a balanced 60 volts to ground from either phase
or neutral. IT systems are often similar. In either case, faults will place
either neutral or
There have been endless argument about what is and is not a telecom*. It
will never be settled to everyone's satisfaction.
however, responding to just a little of what you said,
I would contend that TNV lines can only be those lines which are
conductively connected to public
Dear Richard,
Items in Section General are indeed very general. The actual
Listing Report is inportant. For all the hundreds of ITE products that
ITL has Listed, in the product description, under Construction
Details, we describe all the various types of Listed cords and
specify that
Re that amplifier calibration... you may find that if you can demonstrate
an ability to do what the cal lab does, as well as they do it, you may be
able to calibrate it yourself. The problem is, do you have standards which
are accurate enough to be able to say this, and prove it? In an atmosphere
As I recall, when testing conducted emissions to VDE 0871, it was required
to observe noise in the two powered lines with the switch both open and
closed, and use the higher result. Some power supplies would in fact give
different results if the ground was opened.
An aside: I used to work at
I have a client sending semiconductor deposition equipment to a facility
they recently purchased in Penang, Malaysia. The machine is designed for
use on a 208 volt, 3 phase power system requiring approximately 100 amps at
60 Hz. The current system is five wire (including three phases, neutral
1. Preamp Calibration: We are being quoted $400 - $500 CDN (say
$260-$330 US) to calibrate an HP8447D RF preamp. The quote tells us
that what we are getting for our money is a check of the return loss,
gain, and VSWR. This seems a little involved and a little pricey to me,
but it's the first RF
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