Introduction - Hameg Instruments HZ530 Manual Del Usuario

Introduction

Electromagnetic compatibility continues to be an important issue
in the electronics industry worldwide. The main goal of design
engineers is to meet even 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 decou-
pling, 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-Publications 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 the CE-sign on the device or equipment. By doing so
the manufacturer is liable for all violations of the above regulati-
ons. 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 certi-
fication 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 HM5010 in conjunction with HZ530 close field
sniffer probes, to inspect for emission and leakage; isolate the
source, design and correct the problem and then retest. Once the
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