New Radio Wave Anechoic Chamber
EMC Test Facility Starts Up--Meeting EU/international standards with
a wealth of state-of-the-art equipment
June 15, 2005
| Fuji Xerox has established a New Radio
Wave Anechoic Chamber host structure at its Ebina Center -
a 1 billion yen investment to enhance product quality, safety
and more. The new complex, which is already in operation,
incorporates a Radio Frequency (RF) Fully Anechoic Room with
world-leading performance, which fully complies with EU and
international standards, as well as a 10 m Semi-Anechoic Chamber,
which ranks as one of the largest facilities of its type in
Japan. |
| In addition, an expansion in the scope
of accreditation for testing laboratories to ISO 17025 was
obtained from BELTEST (Belgian Organization for Accreditation
and Conformity Assessment). It enables the upper limit of
the EMCnote1 test frequency to be expanded to 40 GHz to conform
with the test employed for wireless functions in Europe and
the U.S.A. and includes the test for copy machines/multifunction
devices to ascertain acoustic noise levels as specified by
BAM (Blue Angel Mark) in Germany. |
|
note1
|
EMC (Electro Magnetic Compatibility) |
| The RF Fully Anechoic Room satisfies three
major prerequisites for electromagnetic compatibility (EMC)
test facilities: (1) a 5 m full anechoic chamber equipped
with a test environment for wireless equipment, as required
by EU standards; (2) a full anechoic chamber equipped with
an EMC test environment, as required by international standards
published in 2004; and (3) a full anechoic chamber capable
of calibrating antennae and electric probes for testing standard
electromagnetic fields. The facility also accommodates heavy,
stand-alone equipment, and can guarantee a full anechoic environment
of 30 MHz to 40 GHz, thanks to use of newly developed radio
wave-absorbing materials. |
| The 10 m Semi-Anechoic Chamber's equipment
includes: (1) a 10 m turntable for a 10-meter maximum measurement
distance, enabling testing of large-scale systems and equipment
such as computer printers; (2) maximum test capability of
40 GHz, conforming to soon-to-be-introduced international
standards; and (3), in line with the large-sized turntable,
Japan's first flicker suppression testing system (to test
higher harmonics and flicker power supplies), with an attached
power supply system that conforms to 75A international electric
standardization. |
| Fuji Xerox is committed to further improving
the quality and safety of its products through testing of
large-scale systems like computer printers, as well as digital
multifunction/office devices, through the use of equipment
that complies with forthcoming EU and international standards. |
| The rapid development and growth in popularity
of electric/electronic devices and communication equipment
has significantly increased the potential for radio waves
transmitted by such devices to trigger malfunctions in other
equipment or cross-interference between radio waves to the
extent of blocking normal operations and possibly even affecting
the human body. Today, it is imperative to carefully consider
the "electromagnetic environment", with the aim
of preventing adverse interactions between individual electromagnetic
waves and potential damage to equipment operation. |
| To meet these requirements, the International
Electrotechnical Commission (IEC) establishes international
standards and defines allowable limits of electromagnetic
emission from electric/electronic devices and communication
equipment, including digital color multifunction devices and
similar machines. |
|
As a manufacturer that supplies products to the global
market, Fuji Xerox believes that compliance with these international
standards is a critical issue with respect of product quality,
reliability and safety. This belief motivated the company
to build its New Radio Wave Anechoic Chamber Structure with
future international standards as the benchmark. To secure
the reliability of our tests, we also obtained an expansion
of the scope of accreditation of EMC to ISO 17025, which
was granted by BELAC (Belgian Accreditation Structure),
as well as accreditation as an international testing laboratory
under ISO17025, also from BELTEST, which complies with ISO7779,
a specification on acoustic noise measurement, and with
the German RAL Standardnote2.
|
|
note2
|
Domestic quality assurance system used in
Germany. |
| Outline of the New Radio Wave Anechoic
Chamber Building |
| Total construction
cost |
: |
1 billion yen (approx.) |
| Site area |
: |
2,160 m2 |
| Total floor space |
: |
2,997 m2 (two levels, reinforced concrete) |
| Outline of the RF Fully Anechoic Room |
| Room size |
: |
W 7.0 m x L 14.0 m x H 7.0 m |
| Features |
: |
Employs of a newly developed radio wave-absorbing
material that realizes an anechoic space with an extremely
wide frequency range (30 MHz to 40 GHz).
Introduction of a special floor coating of low dielectric
material, together with the turntable means that caster-fitted,
stand-alone equipment can be wheeled-in and used with ease.
Self-powered receiving antennae for measurement enable arbitrary
positioning of the test point anywhere between 1 m and 5 m.
Various measurements can be carried out in this chamber, including
radio frequency immunity measurement (test for malfunction
caused by a radiation field), measurement of electromagnetic
emission from information processing equipment, measurement
of the intensity from wireless product, and calibration of
the electric field probes (sensors). |
|
| <RF Fully Anechoic Room> |
| Outline of 10 m Semi-Anechoic Chamber |
| Room size |
: |
W 19.0m x L 27.0m x H 8.5m |
| Features |
: |
Employs a newly developed combined-type
radio wave-absorbing material that realizes an anechoic space
with an extremely wide frequency range (30 MHz to 40 GHz),
not currently available in any other EMC semi-anechoic chamber.
The chamber has dual turntables, one 10 m in diameter (10-ton
load capacity) and the other 3 m in diameter (3-ton load capacity),
and is capable of measuring large-scale equipment.
Noise emitted from the top surfaces of various kinds of equipment
can be measured using an antenna elevator with automatic electric
elevation angle controls.
Introduction of a 3-phase compliant 90 kVA CVCF (Constant-Voltage,
Constant-Frequency) system enables measurement of high-current
equipment. |
|
| <10 m Semi-Anechoic Chamber> |
|
