IMO - It's all a question of balance:
For all practical purposes
1)- if you have margin (i.e . the MU), then no antenna movement is
required.
2) - If the EUT is small wrt to the measurement distance: ditto
3) If your EUT FILLS the turntable and/or you have minimal margin
the antenna adjustment
In message
e2ceff6b0970a840bb7597dc31bec3300305a...@esebe107.noe.nokia.com, dated
Wed, 20 Feb 2008, ari.honk...@nsn.com writes:
Probably no-one's feelings are hurt if a manufacturer makes a
compromise in their own tests in a way that the results are say 1 dB
higher (but never lower) than what
In message
f50a4280b6033741b1dd2b4e902258b1071af...@orsmsx411.amr.corp.intel.com,
dated Wed, 20 Feb 2008, Pettit, Ghery ghery.pet...@intel.com writes:
Well, John, it's been there for a while. It's been in CISPR 22 since
at least the 2nd Edition in 1993 (I don't have an electronic copy of
the
That would be a reasonably challenging objective.
I believe the principle now is in a way sound: if you follow the
standard's text to the letter, now when you record the final reading
from your receiver the horizontal distance between antenna and EUT
really is 10 metres. And this single
Well, John, it's been there for a while. It's been in CISPR 22 since at
least the 2nd Edition in 1993 (I don't have an electronic copy of the
1st Edition on my computer). If you have a better idea, we'd love to
hear it as we've been looking at this very issue in CISPR 22 and the
upcoming CISPR
Exactly. And, Ari, maybe we need to make this clearer in the next
update to CISPR 22 and in CISPR 32 when we finally publish it (in our
lifetimes?).
Ghery
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
ari.honk...@nsn.com
Sent: Wednesday, February 20, 2008 12:00 PM
To:
Figure three shows the minimum size of the metal ground plane for an OATS,
nothing more. Figure 2 illustrates the straight line perimeter of the EUT.
This is also the same in CISPR 22, Edition 5 which was published in 2005 and
is the basis for EN 55022:2006.
And you are correct, the actual
To be precise in the measurement distance, yes. Now, what many will do
is test at a closer distance and only move the antenna back for a
particular turntable position if additional margin to the limit is
needed. I've never seen a lab move the mast forwards and backwards, but
a strict reading
In message
e2ceff6b0970a840bb7597dc31bec3300305a...@esebe107.noe.nokia.com, dated
Wed, 20 Feb 2008, ari.honk...@nsn.com writes:
This is indeed inconvenient,
It certainly is, and while your work-around is OK, it would not impress
the assessors! It's surprising that such a provision was
Please see comments below.
Bill Owsley wrote:
Could that be tested by putting on the turntable a large coil and DC current
in the chamber that is vibrating and then measure what microphonics appear?
This could be done but the amplitude would be proportional to the DC field and
phase angle as
The 2008 IEEE Product Safety Engineering
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We are seeking presentations and papers on:
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I have the 2005 version of CISPR 22 in hand and it says:
The boundary of the EUT is defined by an imaginary straight-line
periphery describing a simple geometric configuration encompassing the
EUT. All ITE intersystem cables and connecting ITE shall be included
within this boundary (see also
Ghery,
I don't understand your desciption.
I thought the original question was to find the 3 or 10 or 30 meter distance,
numbers not actually mentioned, specified in the two standards given the
interesting text in the standards. For example, Figure 3 of CISPR 22:2003
shows the circle surrounding
Can you apply a VCCI mark to your product as a Rank D supporting member of
VCCI?
Thanks,
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc
I don't understand. Are you saying that the antenna needs to be moved in
and out as the table is rotating?
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=
Actually, draw an outline of the EUT boxes on the table. Now draw a straight
line between the outer edges of the boxes. As the turntable rotates the
measurement distance is from the antenna to this outline. It is not a circle
containing the EUT, the actual measurement point can be closer to the
Could that be tested by putting on the turntable a large coil and DC current
in the chamber that is vibrating and then measure what microphonics appear?
I seem to recall that our nerves, other than audio and optical, can only feel
vibrations up to a few hundreds of hertz which is below the
Dear Experts,
We are planning to sell our RFID reader that operates
with 13.56 MHz transciever to an OEM at Indonesia. For this product we have
already obtained FCC ID (FCC Part 15 Sub part 'C' section 15.225) and we have
tested / generated reports (as per ETSI 301489
Dear experts,
I have a question about definition of antenna-to-EUT distance in
CISPR 22 and ANSI C63.4.
CISPR 22:2005 clause 10.3.1 (Antenna-to-EUT distance) says that:
Measurement of the radiated field shall be made with the antenna
located at the horizontal distance from boundary of
All
We are attempting to install an NSG 1007 power source plus NSG 2200 AC
switch in out lab.
Has anyone installed one of these AC switches together with a suitable power
source? If so could you tell me of any particular installation requirements
or problems encountered with it, please.
It may be
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