CN108337046A - FTTx terminated line testers - Google Patents
FTTx terminated line testers Download PDFInfo
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- CN108337046A CN108337046A CN201810464146.XA CN201810464146A CN108337046A CN 108337046 A CN108337046 A CN 108337046A CN 201810464146 A CN201810464146 A CN 201810464146A CN 108337046 A CN108337046 A CN 108337046A
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- optical splitter
- photodetector
- wavelength division
- division multiplexer
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- 230000003287 optical effect Effects 0.000 claims abstract description 85
- 238000012545 processing Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 10
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 18
- 239000000835 fiber Substances 0.000 abstract description 15
- 239000013307 optical fiber Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 241000282326 Felis catus Species 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of FTTx terminated lines testers, are related to fiber optic communication measuring apparatus, it is intended to and solving the problem of that traditional detection device is inadaptable to three-in-one fiber optic communication influences using effect, its key points of the technical solution are that：Including optical splitter A, wavelength division multiplexer and photodetector, wavelength division multiplexer is two, respectively wavelength division multiplexer A and wavelength division multiplexer B, the ends OLT are connected to wavelength division multiplexer A by optical splitter A, ONT is connected to wavelength division multiplexer B by optical splitter A, photodetector is four, wavelength division multiplexer A and wavelength division multiplexer B is separately connected two photodetectors, for photodetector for detecting vision signal, photodetector output end signal is connected to data processing module there are one being connected in two photodetectors of wavelength division multiplexer A.The FTTx terminated line testers of the present invention, are adapted to three-in-one optical fiber, more can easily measure FTTx user terminals, and can directly determine failure cause and position.
Description
Technical field
The present invention relates to fiber optic communication measuring apparatus, more specifically, it relates to a kind of FTTx terminated lines tester.
Background technology
Fiber optic communication is to transmit the communication mode of information in optical fiber using light wave, since laser has high direction
Remarkable advantages, the light waves in fiber optic communication such as property, high coherence, high monochromaticity are mainly laser, and laser-optical fiber is done so being called
Communication.The principle of fiber optic communication is：It first has to the information (such as voice) of transmission to become electric signal in transmitting terminal, is then modulated to
On the laser beam that laser is sent out, the intensity of light is set to change with the amplitude (frequency) of electric signal and change, and sent by optical fiber
It goes out；In receiving terminal, detector converts it into electric signal, demodulated recovery prime information after receiving optical signal.Fiber optic communication
Have become the prevailing transmission means of modern communication networks.
The Ministry of Industry and Information Technology in 2012 is the requirement of " accelerating broadband China construction ", " accelerating to popularize fiber entering household ", is pushed away
Into fiber to the home construction, the tissue establishment of Communication Development department of the Ministry of Industry and Information Technology《Residential quarter and residential housing inner fiber are to family
Communications facility engineering design code》With《Residential quarter and residential housing inner fiber are to family communications facility engineering construction and acceptance specification》
From 2 national standard April 1 it is formal implement since, the scheme for measuring FTTx user terminals concentrates on " etalon optical power meter " substantially
" PON light power meters " two class instrument.
Currently, with the development of the communication technology and society, fiber optic communication gradually carries out three-in-one improvement, traditional inspection
Measurement equipment can not be applicable in detection vision signal therein, and operation is relatively cumbersome, influences using effect, it is therefore desirable to propose a kind of
New scheme solves the problems, such as this.
Invention content
It, can in view of the deficiencies of the prior art, the present invention intends to provide a kind of FTTx terminated lines tester
To adapt to three-in-one fiber optic communication, operation is more convenient, and can directly determine failure cause and position.
The present invention above-mentioned technical purpose technical scheme is that：A kind of FTTx terminated lines test
Instrument, including optical splitter A, wavelength division multiplexer and photodetector, the wavelength division multiplexer be two, be connected separately in point
Two low ends of light device A, two wavelength division multiplexers are respectively that wavelength division multiplexer A and the ends wavelength division multiplexer B, OLT pass through
The low end signal of the optical splitter A is connected to wavelength division multiplexer A, ONT and is connected to by the low end signal of the optical splitter A
Wavelength division multiplexer B, the photodetector are four, and the wavelength division multiplexer A and wavelength division multiplexer B are connected separately two
Photodetector, signal are connected in two photodetectors of the wavelength division multiplexer A that there are one photodetectors for visiting
Vision signal is surveyed, the photodetector output end signal is connected to data processing module.
By using above-mentioned technical proposal, in use, user optical splitter A need to only be concatenated it is straight to the ends ONT and the ends OLT
In thang-kng channel, optical fiber link can be detected using each photodetector later, use relatively convenient；While because
For the photodetector for being provided with for detecting vision signal, it is possible to be suitable for three-in-one fiber optic communication.
The present invention is further arranged to：Optical splitter B, the light splitting are in series between the optical splitter A and wavelength division multiplexer A
Device B signal is connected with semiconductor laser.
By using above-mentioned technical proposal, the other structures that semiconductor laser coordinates the present invention can be utilized to constitute echo
Loss test light path is more fully detected ONT-OLT links in the way of insertion return loss test, with detection fiber link
The problem of where.
The present invention is further arranged to：The splitting ratio of the optical splitter A is 50:50~97:3, the light splitting of the optical splitter B
Than being 30:70~70:30.
The present invention is further arranged to：The data processing module includes that signal amplifier, signal are connected to signal amplification
The A/D converter of device, data connection in A/D converter processing unit and data connection in the memory of processing unit, institute
State the data input/output terminal that data processing module includes external.
By using above-mentioned technical proposal, result is measured again by after processing unit processes, can be stored in memory,
Follow-up user can connect other ancillary equipments, further be handled data.
The present invention is further arranged to：The data processing module includes digital display unit, and the digital display unit is connected to place
Manage unit.
By using above-mentioned technical proposal, the data crossed by processing unit processes can be shown by digital display unit, so as to
User quickly obtains testing result, finds out link problem place.
The present invention is further arranged to：Four photodetectors are respectively photodetector A, photodetector B, light
Electric explorer C and photodetector D, the photodetector A and photodetector B signal are connected to wavelength division multiplexer A, and
For the photodetector B for detecting vision signal, it is multiple that the photodetector C and photodetector D signals are connected to wavelength-division
With device B, the data processing module is provided with power detection pattern, and the power detection pattern is at least 6 kinds, including,
The ends luminous power P1, ONT uplink signal passes sequentially through optical splitter A and wavelength division multiplexer B measures luminous power by photodetector D
P1；
The ends luminous power P2, OLT downlink signal passes sequentially through the ends optical splitter A and ONT, is reflected at the ends ONT, passes sequentially through optical splitter
A and wavelength division multiplexer B measures luminous power P2 by photodetector C；
The ends luminous power P3, OLT downlink signal passes sequentially through optical splitter A, optical splitter B, wavelength division multiplexer A and is surveyed by photodetector A
Obtain luminous power P3；
Luminous power P4, the optical signal that semiconductor laser is sent out passes sequentially through optical splitter B, the ends optical splitter A, OLT, in the ends OLT quilt
Reflection, passes sequentially through optical splitter A, optical splitter B, wavelength division multiplexer A, luminous power P4 is measured by photodetector A；Luminous power P5,
The optical signal that semiconductor laser is sent out passes sequentially through optical splitter B, optical splitter A, wavelength division multiplexer B, is measured by photodetector C
Luminous power P5；
The ends luminous power P6, OLT downstream video signal passes sequentially through optical splitter A, optical splitter B, wavelength division multiplexer A by photodetector
B measures luminous power P6；
The data processing module obtains testing result according to logic of propositions table
By using above-mentioned technical proposal, data processing module can utilize at above-mentioned power detection pattern cooperation logic of propositions table
Reason obtains testing result.
In conclusion the invention has the advantages that：Optical splitter A is set, and optical splitter A's is separately connected optical splitter B
It is connected with wavelength division multiplexer A and semiconductor laser with wavelength division multiplexer B, wherein optical splitter B, wavelength division multiplexer A is connected with again
Two photodetectors, and one of photodetector is for detecting vision signal；There are two wavelength division multiplexer B equally connections
Photodetector；Photodetector is connected with data processing module；In use, user optical splitter A need to only be concatenated to ONT and
In the bar path of OLT, link can be detected with that, it is easy to use；Due to being provided with for detecting vision signal
Photodetector, it is possible to adapt to three-in-one network；Simultaneously as being provided with semiconductor laser, it is possible to coordinate
Other structures form return loss optical system for testing, and power detection pattern in setting 6, so more comprehensively test outgoing link is asked
The reason of topic occurs, and problem position is found, it is user-friendly.
Description of the drawings
Fig. 1 is the structural diagram of the present invention, to show structure of the present invention in addition to data processing module；
Fig. 2 is the structural schematic diagram of the present invention, mainly to the structure of display data processing module.
In figure：2, optical splitter A；4, photodetector A；5, photodetector B；6, wavelength division multiplexer A；7, optical splitter B；8、
Semiconductor laser；9, wavelength division multiplexer B；10, photodetector C；11, photodetector D；12, data processing module；121、
Signal amplifies；122, A/D converter；123, processing unit；124, memory；125, digital display unit.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention will be described in detail.
The ends ONT are user terminal, such as light cat in the present embodiment；The ends OLT are the one end for being connected to telecommunication bureau；High end thoroughly is
The stronger one end of light, low end are the weaker one end of light transmission.
FTTx terminated line testers, referring to Fig.1, including optical splitter A2, wavelength division multiplexer and photodetector.
Wherein wavelength division multiplexer is two, and respectively wavelength division multiplexer A6 and wavelength division multiplexer B9, the two are connected to
Two low ends of optical splitter A2.
In use, optical splitter A2 is concatenated between the ends ONT and the ends OLT, the ends OLT are connected by the low end signal of optical splitter A2
It is connected to wavelength division multiplexer A6, and ONT is connected to wavelength division multiplexer B9 by the low end signal of optical splitter A2.
Photodetector is four, respectively photodetector A4, photodetector B5, photodetector C10 and light
Electric explorer D11.Photodetector A4 and photodetector B5 are connected to wavelength division multiplexer A6；Photodetector C10 and
Photodetector D11 distinguishes signal in wavelength division multiplexer B9.
Further, photodetector A4 and photodetector C10 is the photodetector of 1490nm；Photodetector B5
For the photodetector of 1550nm, that is, it is used to detect the photodetector of video；The photoelectricity that photodetector D11 is 1310nm is visited
Survey device.Four photodetectors contain filter, to ensure using effect.
Due to the photodetector that photodetector B5 is 1550nm, so present invention may apply to three-in-one optical fiber
Communication.
Referring to Figures 1 and 2, in order to obtain testing result, photodetector also signal is connected with data processing module
12, for carrying out analyzing processing to the signal measured.
Data processing module 12 include sequentially connected signal amplifier 121, A/D converter 122, processing unit 123 with
And memory 124.The result measured is delivered to processing unit 123 after A/D is converted and is handled, and is stored in storage later
In device 124.Processing unit 123 is the unit with data-handling capacity such as MCU.
Data processing module 12 includes external data input/output terminal, so that the external other equipment auxiliary of user makes
With.
Further, data processing module 12 further includes having digital display unit 125, and digital display unit 125 is connected to processing unit
123, the digital display screen with figure and text importing function for selecting market common.The data processing knot of processing unit 123
Fruit can be shown by digital display unit 125, be read for user.
Referring to Figures 1 and 2, in order to which staff in actual use can easily find out asking in ONT and OLT links
Topic and problem position are serially connected with optical splitter B7, optical splitter B7 also signal between optical splitter A2 and wavelength division multiplexer A6 and connect
It is connected to semiconductor laser 8, semiconductor laser 8 is also attached to processing unit 123, so that user manipulates it.
It is provided with 6 kinds of power detection patterns in processing unit 123 simultaneously, and is stored with logic of propositions table.6 kinds of power are visited
Survey pattern is respectively：
The ends luminous power P1, ONT uplink signal passes sequentially through optical splitter A2 and wavelength division multiplexer B9, is measured by photodetector D11
Luminous power P1；Simply it is denoted as end → 2 → 9 → 11 ONT.
The ends luminous power P2, OLT downlink signal passes sequentially through the ends optical splitter A2 and ONT, is reflected, is passed sequentially through at the ends ONT
Optical splitter A2 and wavelength division multiplexer B9 measures luminous power P2 by photodetector C10；OLT → 2 → ends ONT simply are denoted as,
The ends ONT are reflected back → 2 → 9 → 10.
The ends luminous power P3, OLT downlink signal passes sequentially through optical splitter A2, optical splitter B7, wavelength division multiplexer A6, is visited by photoelectricity
It surveys device A4 and measures luminous power P3；Simply it is denoted as end → 2 → 7 → 6 → 4 OLT
Luminous power P4, the optical signal that semiconductor laser 8 is sent out passes sequentially through optical splitter B7, the ends optical splitter A2, OLT, at the ends OLT
It is reflected, passes sequentially through optical splitter A2, optical splitter B7, wavelength division multiplexer A6, luminous power P4 is measured by photodetector A4；Simply
The ends 8 → 7 → 2 → OLT are denoted as, → 2 → 7 → 6 → 4 are reflected back toward at the ends OLT.
Luminous power P5, the optical signal that semiconductor laser 8 is sent out pass sequentially through optical splitter B7, optical splitter A2, wavelength-division multiplex
Device B9 measures luminous power P5 by photodetector C10；Simply it is denoted as 8 → 7 → 2 → 9 → 10.
The ends luminous power P6, OLT downstream video signal passes sequentially through optical splitter A2, optical splitter B7, wavelength division multiplexer A6, by light
Electric explorer B (5) measures luminous power P6；Simply it is denoted as end → 2 → 7 → 6 → 5 OLT.
Logic of propositions table is：
Wherein luminous power P1~P5 is for judging that link condition, P6 are only used for measuring downlink VIDEO video performance numbers, are not involved in and sentence
It is disconnected.
The splitting ratio of optical splitter A2 is 50:50~97:The splitting ratio of 3, optical splitter B7 are 30:70~70:30.This group of data
Optimal value is measured at present for our company, loss etc. can be minimized.
Use process：User first concatenates optical splitter A2 to the bar path between the ends ONT and the ends OLT, then opens
The present invention is opened, light path is detected using 6 kinds of power detection patterns successively according to actual conditions, and is sentenced according to logic of propositions table
Disconnected the reason of going wrong and problem position.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of FTTx terminated lines tester, including optical splitter A（2）, wavelength division multiplexer and photodetector, feature exist
In：
The wavelength division multiplexer is two, is connected separately in optical splitter A（2）Two low ends, two wavelength-divisions are multiple
It is respectively wavelength division multiplexer A with device（6）With wavelength division multiplexer B（9）, the ends OLT pass through the optical splitter A（2）Low end signal
It is connected to wavelength division multiplexer A（6）, ONT passes through the optical splitter A（2）Low end signal be connected to wavelength division multiplexer B（9）,
The photodetector is four, the wavelength division multiplexer A（6）With wavelength division multiplexer B（9）It is connected separately two light
Electric explorer, signal are connected to the wavelength division multiplexer A（6）Two photodetectors in there are one photodetectors for visiting
Vision signal is surveyed,
The output end signal of the photodetector is connected to data processing module（12）.
2. FTTx terminated lines tester according to claim 1, it is characterised in that：The optical splitter A（2）It is multiple with wavelength-division
With device A（6）Between be in series with optical splitter B（7）, the optical splitter B（7）Signal is connected with semiconductor laser（8）.
3. FTTx terminated lines tester according to claim 2, it is characterised in that：The optical splitter A（2）Splitting ratio
It is 50:50~97:3, the optical splitter B（7）Splitting ratio be 30:70~70:30.
4. FTTx terminated lines tester according to claim 2, it is characterised in that：The data processing module（12）Packet
Include signal amplifier（121）, signal be connected to signal amplifier（121）A/D converter（122）, data connection in A/D convert
Device（122）Processing unit（123）And data connection is in processing unit（123）Memory（124）, the data processing mould
Block（12）It include external data input/output terminal.
5. FTTx terminated lines tester according to claim 4, it is characterised in that：The data processing module（12）Packet
Include digital display unit（125）, the digital display unit（125）It is connected to processing unit（123）.
6. FTTx terminated lines tester according to claim 4 or 5, it is characterised in that：Four photodetectors
Respectively photodetector A（4）, photodetector B（5）, photodetector C（10）And photodetector D（11）, the light
Electric explorer A（4）With photodetector B（5）Signal is connected to wavelength division multiplexer A（6）, and the photodetector B（5）For
Detect vision signal, the photodetector C（10）With photodetector D（11）Signal is connected to wavelength division multiplexer B（9）, institute
State data processing module（12）It is provided with power detection pattern, the power detection pattern is at least 6 kinds, including,
The ends luminous power P1, ONT uplink signal passes sequentially through optical splitter A（2）With wavelength division multiplexer B（9）, by photodetector D
（11）Measure luminous power P1；
The ends luminous power P2, OLT downlink signal passes sequentially through optical splitter A（2）It with the ends ONT, is reflected, is passed sequentially through point at the ends ONT
Light device A（2）With wavelength division multiplexer B（9）, by photodetector C（10）Measure luminous power P2；
The ends luminous power P3, OLT downlink signal passes sequentially through optical splitter A（2）, optical splitter B（7）, wavelength division multiplexer A（6）, by photoelectricity
Detector A（4）Measure luminous power P3；
Luminous power P4, semiconductor laser（8）The optical signal sent out passes sequentially through optical splitter B（7）, optical splitter A（2）, the ends OLT,
It is reflected at the ends OLT, passes sequentially through optical splitter A（2）, optical splitter B（7）, wavelength division multiplexer A（6）, by photodetector A（4）It surveys
Obtain luminous power P4；
Luminous power P5, semiconductor laser（8）The optical signal sent out passes sequentially through optical splitter B（7）, optical splitter A（2）, wavelength-division it is multiple
With device B（9）, by photodetector C（10）Measure luminous power P5；
The ends luminous power P6, OLT downstream video signal passes sequentially through optical splitter A（2）, optical splitter B（7）, wavelength division multiplexer A（6）, quilt
Photodetector B（5）Measure luminous power P6；
The data processing module（12）Testing result is obtained according to logic of propositions table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810464146.XA CN108337046B (en) | 2018-05-15 | 2018-05-15 | FTTx terminal line tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810464146.XA CN108337046B (en) | 2018-05-15 | 2018-05-15 | FTTx terminal line tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108337046A true CN108337046A (en) | 2018-07-27 |
| CN108337046B CN108337046B (en) | 2023-10-24 |
Family
ID=62935128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810464146.XA Active CN108337046B (en) | 2018-05-15 | 2018-05-15 | FTTx terminal line tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN108337046B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267280A (en) * | 2019-06-03 | 2019-09-20 | 创信测试技术(深圳)有限公司 | A kind of communication signal tester and communication signal test method |
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|---|---|---|---|---|
| CN102932056A (en) * | 2012-11-12 | 2013-02-13 | 烽火通信科技股份有限公司 | Method and device for detecting optical signal performance and diagnosing fiber link fault |
| US20150043908A1 (en) * | 2013-08-07 | 2015-02-12 | Jdsu Deutschland Gmbh | Testing a passive optical network |
| CN204993350U (en) * | 2015-08-05 | 2016-01-20 | 浙江天创信测通信科技有限公司 | Hand -held type PON optical power meter |
| CN206402230U (en) * | 2017-01-11 | 2017-08-11 | 上海嘉慧光电子技术有限公司 | Optical assembly, the detecting devices using the optical assembly |
-
2018
- 2018-05-15 CN CN201810464146.XA patent/CN108337046B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932056A (en) * | 2012-11-12 | 2013-02-13 | 烽火通信科技股份有限公司 | Method and device for detecting optical signal performance and diagnosing fiber link fault |
| US20150043908A1 (en) * | 2013-08-07 | 2015-02-12 | Jdsu Deutschland Gmbh | Testing a passive optical network |
| CN204993350U (en) * | 2015-08-05 | 2016-01-20 | 浙江天创信测通信科技有限公司 | Hand -held type PON optical power meter |
| CN206402230U (en) * | 2017-01-11 | 2017-08-11 | 上海嘉慧光电子技术有限公司 | Optical assembly, the detecting devices using the optical assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267280A (en) * | 2019-06-03 | 2019-09-20 | 创信测试技术(深圳)有限公司 | A kind of communication signal tester and communication signal test method |
| CN110267280B (en) * | 2019-06-03 | 2024-04-02 | 创信测试技术(深圳)有限公司 | Communication signal tester and communication signal testing method |
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| Publication number | Publication date |
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| CN108337046B (en) | 2023-10-24 |
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