BK Precision PR-261 Sonde
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Modèle:
PR-261
Date:
1996
Catégorie:
Groupe:
Description:
NEAR FIELD “SNIFFER” PROBE
Information
Users are advised to read through these instructions so that
all functions are understood. Immediately after unpacking,
the instrument should be checked for mechanical damage and
loose parts in the interior. If there is transport damage,
the supplier must be informed immediately. The probes must
then not be put into operation.
Electromagnetic compatibility continues to be an important
issue in the electronics industry worldwide. The main goal
of design engineers is to meet ever more demanding
specifications, while also making circuitry quieter and more
robust to meet tough EMC regulations. The design of
microcontroller based products which fully comply with
present and imminent EMC regulations isn’t an easy task to
undertake with the use of current technologies. Even with
the best PCB layout techniques and the most substantial
decoupling, at the speeds of today’s designs, radiation from
boards and the consequent noise impinging on PCBs is
becoming a growing problem that will not go away.
By the date of January 1, 1996, every electronic instrument
or device which can be imported to the European community
must meet the EMC regulations according to EN 55011 to 22 ,
EN 50081-1 and CISPR-Publi- cations 11 to 22. The EMC
directive refers to both electromagnetic emissions and
electromagnetic immunity. The manufacturer of electronic
equipment or devices declares the conformity of his product
with the above regulations by the placement of the CE-sign
on the device or equipment. By doing so the manufacturer is
liable for all violations of the above regulations. Goods
without the CE-sign are not allowed to be sold in the
European Community.
In order to be sure that the manufactured equipment meets
all specifications according to the EMC regulations,
extensive test during the design phase of every electronic
device must be done. One of the methods of CE certification
is to use the services of a professional testing lab that
specializes in the compliance certification process. The lab
will have precise test equipment and a shielded, screen room
within which the inspection is performed. Since many
products being certified will require modification and
redesign, the customer is charged on an hourly basis for
test time used. Quite often, many trips are made between the
test lab and the design/development facility. In order to
minimize the cost of the test, it is recommended that a
“Pre-Compliance” phase in product development first be
conducted. This phase would use a spectrum Analyzer such as
the B+K Precision 2600 Series in conjunction with PR-261
close field sniffer probes, to inspect for emission and
leakage; isolate the source, design and correct the problem
and then retest. Once the product appears
electromagnetically “quiet”, it is submitted to the
compliance certification laboratory. This should save the
expense for much of the test time, since the submitted unit
has already been pretested. Typically, the test time and
money saved should represent many times the purchase price
of the spectrum Analyzer.
Type manuel:
Manuel de l'utilisateur
Pages:
20
Taille:
786.86 Kbytes (805745 Bytes)
Langue:
english
Révision:
Manuel-ID:
480-767-9-001
Date:
1996 01 01
Qualité:
Document scanné, tous les lisible.
Date de transfert:
2017 01 25
MD5:
9429c41c051d6ae577a5026848d7f10e
Téléchargements:
375
Information
SAFETY ...
Inside Front Cover
INTRODUCTION ...
I
General
Information ...
1
Operating
Conditions ...
1
H-Field
Probe ...
2
E-Field
Probe ...
2
High Impedance
Probe ...
2
SPECIFICATIONS ...
3
OPERATION OF THE
PROBES ... 4
Battery
Operation ... 4
Output Impedance
Matching ...
4
Use of different Probe
types ... 4
Accuracy
Notice ... 4
Page
BASIS FOR NEAR-HELD Probe MEASUREMENTS ... 5
The H-Field Near-Field
Probe ... 5
The High-Impedance
Probe ... 5
The E-Field Monopole
Probe ... 5
PROBE
APPLICATIONS ... 6
COMMONLY ASKED QUESTIONS ABOUT PRE-COMPLIANCE EMISSIONS
TESTING ... 13