EMI Pre-Compliance Guide RIGOL Technologies
RIGOL Technologies CO., LTD. 09.09.2021
RIGOL´s new Solution for EMI pre-compliance tests
Enhanced EMI measurement function and a simple user-friendly
operating environment complete RIGOL’s real time spectrum analyzer
versions RSA3000N and RSA5000N.
Electromagnetic compatibility [EMC] has become one of the most important topics in the last
23 years. EMC activities during design phase are absolutely mandatory to ensure the
functionality of development and to protect the environment from electro smog.
Each new development must be tested in a test laboratory in accordance with related
standards in order to be CE certified. This certification is necessary to bring a new product to
the market. Different standards are used depending what kind of product is designed. For
example standard CISPR 22 (EN55022) needs to be passed for an information technology
equipment” [ITE] like a MP3 player or a modem (telecommunication). Each standard
specifies frequency ranges for conducted and radiated emission of a product and defines
maximum limits in dBµV for each analysis. Pre-compliance analysis is very important during
design stage because it’s estimated that ~50% of products fail the first acceptance test. A
second full compliance test is very expensive and time consuming. But also a re-design has a
strong financial impact and uncalculated additional time is necessary which is a question of
cost in the end as well. In order to avoid this scenario, initial EMC analysis and measurements
are necessary at a very early stage of development and must be carried out throughout
development, including pre-compliance checks. A survey
1
shows that the average cost of EMC
activities during development is at ~3-5% of whole development cost. However, if these
activities will not be performed and the compliance test is failed, the cost of post-
development can be arise up to 50% to 100% of the actual planned cost. For EMC analysis
and pre-compliance control, RIGOL has been offering since years solution with spectrum
analyzers of the series DSA800 (including 6 dB filters and quasi-peak value detector [QP])
and PC Software S1210, as well as a near-field probe set NFP-3. This solution has now been
extended and optimized in the RSA3000N/RSA5000N series. This makes it possible to
simplify EMC analysis considerably and also offers even more advanced analysis capabilities.
EMI Problematic
EMC
2
was implemented to generate a peaceful coexistence between transmitter and receiver
of electromagnetic energy. Also unwanted transmitting and receiving are within this
1
Source: „NF- und HF Messtechnik, Herbert Bernstein, ISBN: 978-3-658-07377-0, edition: 2015, §4.2.1 (page: 269)“
2
EMC (Electro Magnetic Compatibility) combines EMI (EM Interference) and EMS (EM Susceptibility).
Real-Time Solutions for EMI Pre-Compliance Testing
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