User manual | E E] U

US 20130286222A1
(19) United States
(12) Patent Application Publication (10) Pub. No.: US 2013/0286222 A1
HE
(54)
(43) Pub. Date:
TESTING SYSTEM FOR
Oct. 31, 2013
Publication Classi?cation
ANTI-ELECTROMAGNETIC
INTERFERENCE
(51)
Int- Cl
H04N 17/04
(52) US, Cl,
(71) ApplicantszHONG FU JIN PRECISION
(2006.01)
INDUSTRY (ShenZhen) CO-, LTD-,
CPC ................................... .. H04N17/04 (2013.01)
(US); HON HAI PRECISION
USPC ........................................................ .. 348/189
INDUSTRY CO., LTD., New Taipei
(TW)
(72)
Inventor:
(57)
Xia0_Lian HE Shenzhen (CN)
A testing system includes a signal emitter, a signal collection
’
(73)
apparatus, and an analyzer. The signal emitter emits electro
Assignees: HON HAI PRECISION INDUSTRY
magnetic signals to cause electromagnetic interference in an
CO” LTD” New Taipei (TW); HONG
FU JIN PRECISION INDUSTRY
(shenzhen) CO” LTD, Shenzhen (CN)
electronic device. The signal collection apparatus collects the
signals outputted by the target electronic device and includes
a light emitter and an optical ?ber. The analyzer is electroni
cally connected to the signal collection apparatus. The light
emitter emits light beams Which reproduce the signals col
lected by the signal collection apparatus, and optical ?ber
transmits the light beams to the analyzer, the analyzer
receives the light beams and reconstitutes the original elec
trical signals, and analyzes determines the electronic device
performance While being subjected to the electromagnetic
(21) App1_ NO; 13/858,097
(22) Filed;
(30)
APL 8, 2013
Foreign Application Priority Data
Apr. 26, 2012
ABSTRACT
(CN) ....................... .. 2012101256158
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US 2013/0286222 A1
TESTING SYSTEM FOR
ANTI-ELECTROMAGNETIC
INTERFERENCE
BACKGROUND
[0001]
1. Technical Field
[0002] The disclosure generally relates to testing systems,
and particularly to a system for testing anti-electromagnetic
Oct. 31,2013
tronic device 200 may be changed, manifested as faintness or
dithering of the video signals, or interruption or attenuation of
the audio signals.
[0014] FIG. 2 shoWs an enlarged vieW of the signal collec
tion apparatus 30, and FIG. 3 shoWs a block diagram of the
testing system 100. Referring to FIG. 2 and FIG. 3, the signal
collection apparatus 30 collects the video and audio signals
output from the electronic device 200 after interference by the
interference abilities.
electromagnetic signals has been applied. The signal collec
[0003] 2. Description of the Related Art
[0004] Electronic devices (e.g., televisions) are subjected
to tests of immunity against ambient electromagnetic inter
ference. During the tests, a signal emitter (e. g., an antenna) is
placed adjacent to the electronic device to emit electromag
netic signals for interfering With the electronic device, and a
signal collection apparatus collects video signals from the
electronic device. Then, the signal collection apparatus trans
tion apparatus 30 includes a housing 31, a camera 32, a
microphone 33, a light emitter 34, and optical ?ber 35. The
housing 31 is made of metal, a cavity is therein. An absorption
layer 311 is painted on the external surface of the housing 31,
to absorb the electromagnetic signals transmitted to the hous
ing 31, and to avoid any re?ection of the signals by the
housing 31. The absorption layer 311 can be made of, for
example, ferric oxide(s). The camera 32 and the microphone
mits the video signals to an analyZer via a coaxial cable, and
the analyZer determines the characteristics of the electronic
33 are ?xed to one end of the housing 31, and have the
electronic device 200 as their target. The camera 32 and the
device in rejecting electromagnetic interference, according to
the video signals.
[0005] HoWever, the signal collection apparatus cannot col
lect audio signals from the electronic device, Which may
microphone 33 collect the video and audio signals respec
tively. In the present embodiment, in order to avoid electro
magnetic interference With the camera 32 and the microphone
33, the external surfaces of the camera 32 and the microphone
cause a gap in the results or an imprecise testing result.
33 are covered by one or more metal nets 323. Grid siZe of the
Additionally, the electromagnetic signals may interfere With
metal net 323 is less than 1A of the Wavelength of the electro
magnetic signals Which cause interference.
video signals because of the use of the coaxial cable.
[0006]
Therefore, there is room for improvement Within the
art.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Many aspects of the present disclosure can be better
understood With reference to the folloWing draWings. The
components in the draWings are not necessarily draWn to
scale, the emphasis instead being placed upon clearly illus
trating the principles of the present embodiments.
[0008]
FIG. 1 is a schematic vieW of a system for testing
anti-electromagnetic interference properties, according to an
exemplary embodiment of the disclose.
[0009]
FIG. 2 is an enlarged vieW of a signal collection
apparatus of the testing system of FIG. 1.
[0010] FIG. 3 is a block diagram of the testing system of
FIG. 1.
DETAILED DESCRIPTION
[0015] The light emitter 34 is received in and shielded by
the housing 31 to avoid interference by the electromagnetic
signals. The light emitter 34 is electronically connected to the
camera 32 and the microphone 33. The light emitter 34
receives the collected video and audio signals and emits tWo
corresponding light beams. Respective strengths of the tWo
light beams are changeable according to changes in the video
and audio signal, for example, voltage changes in the video
signal and frequency changes in the audio signal. The optical
?ber 35 is electronically connected betWeen the light emitter
34 and the analyZer 50. The tWo light beams are transmitted
along the optical ?ber 35 after total re?ection. The optical
?ber 35 transmits the collected signals to the analyZer 50,
Which has a higher degree of immunity against electromag
netic interference than the traditional cable used to transmit
electronic signal, so the analyZer 50 is not affected by the
interference to the collected video and audio signal.
[0016] The analyZer 50 includes a light receiver 52 and a
to test audio and video qualities of an electronic device 200
signal processor 54. The light receiver 52 is electronically
connected to the optical ?ber 35, and receives the tWo light
beams and transforms them into electronic signals. The signal
processor 54 is electronically connected to the light receiver
and its degree of immunity against electromagnetic interfer
52, and demodulates the electronic signals outputted by the
ence. The electronic device 200 may be, for example, a tele
vision.
light receiver 52, to reconstitute the video and audio signals.
The signal processor 54 also calculates any distortion of the
reconstituted video and audio signals. For example, the signal
[0011] FIG. 1 shoWs a testing system 100, according to an
exemplary embodiment. The testing system 100 can be used
[0012]
The testing system 100 includes a signal emitter 10,
a signal collection apparatus 30, and an analyZer 50. The
processor 54 compares the reconstituted video signal and a
signal emitter 10, the signal collection apparatus 30, and the
predetermined standard video signal, to calculate the distor
tion in the reconstituted video signal. The analyZer 50 further
electronic device 200 are all placed in a shielding room (not
labeled) to isolate them against extraneous interference.
[0013] In one exemplary embodiment, the signal emitter 10
is an antenna Which can emit electromagnetic signals of about
80 MHZ-l GHZ, to cause electromagnetic interference in the
electronic device 200. The electromagnetic signals can inter
fere With video signals and audio signals output from the
electronic device 200. For example, When the electronic
device 200 suffers from interference caused by the electro
magnetic signals, the audio and video qualities of the elec
includes a display 56 and a speaker 58 Which are electroni
cally connected to the signal processor 54. The display 56
displays the video signal and the speaker 58 plays the audio
signal, for monitoring by the operator Who is located outside
the shielding room, for example.
[0017] The operation steps of testing system 100 are as
folloWs: ?rst of all, the operator starts the electronic device
200 to output video and audio signals. Secondly, the signal
emitter 10 starts to Work and emits electromagnetic signals
US 2013/0286222 A1
Oct. 31,2013
With predetermined frequencies, the electromagnetic signals
collecting audio signal outputted by the interfered electronic
may adversely affect the video and audio signal outputted by
device, the light emitter emitting a light beam according to the
the electronic device 200. The camera 32 and the microphone
audio signal.
33 of the signal collection apparatus 30 collects the affected
video and audio signals respectively, and transmits all the
3. The testing system as claimed in claim 2, Wherein the
signal collection apparatus further comprises a camera col
signals to the light emitter 34, then triggers the light emitter
lecting video signal outputted by the interfered electronic
34 emits a light beam accordingly, the tWo light beams are
device, the light emitter emitting a light beam according to the
transmitted to the analyZer 50 through the optical ?ber 35.
Finally, the light receiver 52 receives the tWo light beams and
converts the signals into electronic signals, the signal proces
video signal.
sor 54 demodulates the electronic signals to reconstitute the
original video and audio signals. The operator can monitor
the video and audio signals according to the display 56 and
the speaker 58, and calculate any distortion of the video and
audio signal affected by the signal emitter 10 according to the
signal processor 54, thus the operator can determine the
degree of immunity Which the electronic device 200 may have
against electromagnetic interference. For example, if the
electronic device 200 is subjected to electromagnetic signals
With certain predetermined frequencies, but the distortion of
the video and audio signals remains Within a predetermined
range, the degree of immunity against electromagnetic inter
4. The testing system as claimed in claim 3, Wherein the
analyZer further comprises a light receiver electronically con
nected to the optical ?ber, the light receiver receiving the light
beams transmitted by the optical ?ber and converting the light
beams into electronic signals.
5. The testing system as claimed in claim 4, Wherein the
analyZer further comprises a signal processer electronically
connected to the light receiver, the signal processer demodu
lating the electronic signal.
6. The testing system as claimed in claim 5, Wherein the
analyZer further comprises a display and a speaker electroni
cally connected to the signal processor, the display displaying
the video signal and the speaker plays the audio signal.
ference of the electronic device 200 is determined to be good.
7. The testing system as claimed in claim 4, Wherein the
[0018] In summary, the testing system 100 collects audio
signals according to the microphone 33 set by the collection
apparatus 30, Which is convenient for monitoring by the
operator. MeanWhile, the testing system 100 transmits col
signal collection apparatus further comprises a housing made
lected signals via optical ?ber 35, and the original signals
being captured and transmitted in the form of light rays ren
ders them immune to electromagnetic interference. The hous
ing 31 of the collection apparatus 30 absorbs electromagnetic
interference directed to the housing 31, and shields the light
emitter 34, so as to improve the precision and integrity of the
process of collecting signals.
[0019]
Although numerous characteristics and advantages
of the exemplary embodiments have been set forth in the
foregoing description, together With details of the structures
and functions of the exemplary embodiments, the disclosure
is illustrative only, and changes may be made in detail, espe
cially in the matters of arrangement of parts Within the prin
ciples of disclosure to the full extent indicated by the broad
general meaning of the terms in Which the appended claims
are expressed.
What is claimed is:
1. A testing system for anti-electromagnetic interference,
the testing system comprising:
a signal emitter emitting electromagnetic signals causing
electromagnetic interference in an electronic device;
a signal collection apparatus collecting signals outputted
by the target electronic device, the signal collection
apparatus including a light emitter and an optical ?ber,
the light emitter emitting light beams Which reproduce
the signals collected by the signal collection apparatus;
and
an analyZer, Wherein the optical ?ber is electronically con
nected betWeen light emitter and the analyZer and trans
of metal and formed a cavity, the light receiver is received in
the housing.
8. The testing system as claimed in claim 7, Wherein the
external surface of the housing is covered by an absorption
material.
9. A testing system, comprising:
a signal emitter emitting electromagnetic signals to cause
electromagnetic interference in an electronic device;
a signal collection apparatus including a camera used for
collecting a video signal outputted by the target elec
tronic device, a microphone used for collecting an audio
signal outputted by the target electronic device, a light
emitter emitting light beams respectively reproducing
the video and audio signals collected by the signal col
lection apparatus, and an optical ?ber; and
an analyZer, Wherein the optical ?ber is electronically con
nected betWeen light emitter and the analyZer and trans
mits the light beams to the analyZer, the analyZer used
for receiving the light beams and reconstituting original
video and audio signals, and analyZing and determining
the electronic device performance While being subjected
to the electromagnetic interference.
10. The testing system as claimed in claim 9, Wherein the
analyZer further comprises a light receiver electronically con
nected to the optical ?ber, the light receiver receiving the light
beams transmitted by the optical ?ber and transforming the
light beams into electronic signal.
11. The testing system as claimed in claim 10, Wherein the
analyZer further comprises a signal processer electronically
connected to the light receiver, the signal processer demodu
lating the electronic signal.
12. The testing system as claimed in claim 11, Wherein the
analyZer further comprises a display and a speaker electroni
mits the light beams to the analyZer, the analyZer
receives the light beams and reconstitutes original sig
nals, and analyZes and determines performance of the
electronic device While being subjected to the electro
cally connected to the signal processor, the display displaying
the video signal and the speaker plays the audio signal.
magnetic interference.
signal collection apparatus further comprises a housing made
2. The testing system as claimed in claim 1, Wherein the
signal collection apparatus further comprises a microphone
13. The testing system as claimed in claim 12, Wherein the
of metal and formed a cavity, the light receiver is received in
the housing.
US 2013/0286222 A1
14. The testing system as claimed in claim 13, wherein the
external surface of the housing is covered by an absorption
material.
Oct. 31, 2013

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