CN206542537U - A kind of test system of EPON light cat - Google Patents
A kind of test system of EPON light cat Download PDFInfo
- Publication number
- CN206542537U CN206542537U CN201620807940.6U CN201620807940U CN206542537U CN 206542537 U CN206542537 U CN 206542537U CN 201620807940 U CN201620807940 U CN 201620807940U CN 206542537 U CN206542537 U CN 206542537U
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- epon
- output end
- light cat
- test system
- epon light
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model discloses a kind of test system of EPON light cat, including Error Detector, OLT optical modules, adjustable optical attenuator, wavelength division multiplexer, EPON light cat and PC terminals；The output end of Error Detector is connected with OLT optical modules, and the output end of OLT optical modules is connected with adjustable optical attenuator, and the output end of adjustable optical attenuator is connected with wavelength division multiplexer, and wavelength division multiplexer is bi-directionally connected with EPON light cats, and EPON light cat is bi-directionally connected with PC terminals.The utility model is in EPON light cat in whole test process, it is not necessary to change optical fiber, effectively avoids the unfavorable factor brought in test process, adds the stability of test, also improves testing efficiency；When carrying out the test of EPON light cat, directly EPON light cats are tested, test result is accurate；The originator and receiving end of light cat are separately tested, originator and the test parameter of receiving end is pointedly obtained.
Description
Technical field
The utility model is related to a kind of test system of EPON light cat.
Background technology
Oneself enters the information age to today's society, and people are in addition to traditional phone, fax, the demand of data communication, again
Higher want is proposed to the communication of such as computer, high data rate communication, video conferencing, e-mail and multimedia communication
Ask；For the communication network of China, transmission network is by development in recent years, the local telephone network of one-level, two grades of main lines and big and medium-sized cities
Junction line realizes digitlization, optical fiber substantially；Switching network also realizes programme-controlled, digitlization substantially；With transmission network, exchange
The high speed development of net, necessarily promotes the fast development of access network；Light cat demand becomes larger, and improving testing efficiency becomes to pass
It is important.
But EPON light cats do not have SMA interfaces, it is impossible to connect Error Detector by coaxial line（BERT）Tested, can only be passed through
Intelligent acess, may cause end-face pollution and stability not high, and also the calibration tape to light cat carrys out very big inconvenience；Application No.
201520192500.X " a kind of upper ONU of light cat for EPON test system ", it is not necessary to by EPON light cat and Error Detector
It is directly connected to just test light cat, in the patent, is carried out from ring, both received ONU by the main control chip of light cat
Modulated signal be given to ONU originator again, ONU lights, is returned light by optical branching device SPL and the first wavelength division multiplexer WDM1
Back to OLT, by testing OLT sensitivity come the indirect sensitivity for testing ONU.
But the system also has some shortcomings：Because the system is surveyed indirectly by testing the sensitivity of OLT optical modules
ONU sensitivity is tried, test result may have some deviations, the problem of causing to test inaccurate；Simultaneously because have passed through light
The main control chip of cat is carried out from ring, and the data that indirectly testing comes out can only also embody originator and receiving end overall condition, it is impossible to light
The receiving end of cat carries out specific aim test.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of test system of EPON light cat, directly
Connect and EPON light cats are tested, test result is accurate.
The purpose of this utility model is achieved through the following technical solutions：A kind of test system of EPON light cat, bag
Include Error Detector, OLT optical modules, adjustable optical attenuator, wavelength division multiplexer, EPON light cat and PC terminals；The output end of Error Detector is led to
Cross coaxial line to be connected with OLT optical modules, the output end of OLT optical modules is connected with adjustable optical attenuator, adjustable optical attenuator it is defeated
Go out end to be connected with wavelength division multiplexer, wavelength division multiplexer is bi-directionally connected with EPON light cats, and EPON light cat is bi-directionally connected with PC terminals.
Described test system also includes optical branching device and spectroanalysis instrument；The input of the optical branching device is answered with wavelength-division
Connected with device, the first output end of optical branching device is connected with spectroanalysis instrument.
Described test system also includes program control light power meter, described program control light power meter and the second of optical branching device defeated
Go out end connection.
Described test system also includes sampling oscilloscope and clock and data recovery module, the input of the sampling oscilloscope
End is connected with the 3rd output end of optical branching device；The input of clock and data recovery module pass through optical module and optical branching device
Four output ends are connected, and the output end of clock and data recovery module is connected with sampling oscilloscope.
The beneficial effects of the utility model are：（1）In EPON light cat in whole test process, it is not necessary to change optical fiber,
The unfavorable factor brought in test process effectively is avoided, the stability of test is added, also improves testing efficiency.
（2）Directly EPON light cats are tested, test result is accurate.
（3）The originator and receiving end of EPON light cats are separately tested, the test for pointedly obtaining originator and receiving end is joined
Number.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model.
Embodiment
The technical solution of the utility model, but protection domain of the present utility model are described in further detail below in conjunction with the accompanying drawings
It is not limited to as described below.
As shown in figure 1, a kind of test system of EPON light cat, including Error Detector BERT, OLT optical module (transmitting optical mode
Block), adjustable optical attenuator VOA, wavelength division multiplexer WDM, EPON light cat and PC terminals；Error Detector BERT output end passes through coaxial
Line is connected with OLT optical modules, and the output end of OLT optical modules is connected with adjustable optical attenuator VOA, and adjustable optical attenuator VOA's is defeated
Go out end to be connected with wavelength division multiplexer WDM, wavelength division multiplexer WDM and EPON light cats are bi-directionally connected, and EPON light cat and PC terminals are two-way
Connection.
Described test system also includes optical branching device SPL and spectroanalysis instrument OSA；The input of the optical branching device SPL
End is connected WDM with wavelength division multiplexer, and optical branching device SPL the first output end is connected with spectroanalysis instrument OSA.
Described test system also includes program control light power meter PM, described program control light power meter PM and optical branching device SPL
The second output end connection.
Described test system also includes sampling oscilloscope DCA and clock and data recovery module CDR, the sampling oscilloscope
DCA input is connected with optical branching device SPL the 3rd output end；Clock and data recovery module CDR input passes through optical mode
Block（Receive optical module）It is connected with optical branching device SPL the 4th output end, clock and data recovery module CDR output end and sampling
Oscillograph DCA connections.
Operation principle of the present utility model is as follows：The receiving end test of EPON light cats：Allow Error Detector（BERT）Produce 1.25G
PRBS7 modulated signal is sent to OLT optical modules, then is connected to EPON by adjustable optical attenuator VOA, wavelength division multiplexer WDM
Light cat,
The data for the signal that PON MAC chips in EPON light cats receive EPON light cat and clock recovery come out, and pass
It is defeated to be tested to PC terminals, in test process, by adjusting adjustable optical attenuator（VOA）The size that regulation receives light can
Test sensitivity of EPON light cats etc. and receive parameter；（Further, if reception light is too small, the mistake of EPON light cat signals is caused
Sentence, the meeting display of PC terminals currently has error code and the current bit error rate, if at this moment test result will show that NG receptions are photosynthetic
Suitable, PC terminals can be shown currently without error code, and at this moment test result will show PASS）.Due to the receiving end test to EPON light cats
Directly to test, so, test result is accurate, and receiving end data are to separate with originating data, can pointedly obtain receipts
End data.
The originator test of EPON light cats：Sent by PC terminals and instruct the PON MAC chips allowed in EPON light cats to produce
1.25G PRBS7 modulated signal, and EPON light cat is in long luminance；The spectrum that optical branching device SPL passages 1 are connected
Analyzer OSA carrys out the parameters such as test center's wavelength, spectrum width；The program control light power meter PM that optical branching device SPL passages 2 are connected, passes through
The originator luminous power of the later test EPON light cats of calibration；The sampling oscilloscope DCA that optical branching device SPL passages 3 are connected can be surveyed
The originator parameter such as eye pattern is tried out, optical branching device SPL passages 4 pass through optical module（Receive optical module）Connect clock and data recovery module
CDR carries out recovering clock signals, is transferred to sampling oscilloscope DCA as sampling foundation.
Claims (4)
1. a kind of test system of EPON light cat, is directly tested EPON light cats, it is characterised in that：Including Error Detector, OLT
Optical module, adjustable optical attenuator, wavelength division multiplexer, EPON light cat and PC terminals；The output end of Error Detector passes through coaxial line and OLT
Optical module is connected, and the output end of OLT optical modules is connected with adjustable optical attenuator, the output end and wavelength-division multiplex of adjustable optical attenuator
Device is connected, and wavelength division multiplexer is bi-directionally connected with EPON light cats, and EPON light cat is bi-directionally connected with PC terminals.
2. a kind of test system of EPON light cat according to claim 1, it is characterised in that：Described test system is also wrapped
Include optical branching device and spectroanalysis instrument；The input of the optical branching device is connected with wavelength division multiplexer, and the first of optical branching device is defeated
Go out end to be connected with spectroanalysis instrument.
3. a kind of test system of EPON light cat according to claim 1, it is characterised in that：Described test system is also wrapped
Program control light power meter is included, described program control light power meter and the second output end of optical branching device are connected.
4. a kind of test system of EPON light cat according to claim 1, it is characterised in that：Described test system is also wrapped
Sampling oscilloscope and clock and data recovery module are included, the input of the sampling oscilloscope and the 3rd output end of optical branching device connect
Connect；The input of clock and data recovery module is connected by the 4th output end of optical module and optical branching device, clock and data recovery
The output end of module is connected with sampling oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620807940.6U CN206542537U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of EPON light cat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620807940.6U CN206542537U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of EPON light cat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206542537U true CN206542537U (en) | 2017-10-03 |
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ID=59936899
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620807940.6U Active CN206542537U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of EPON light cat |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039445A (en) * | 2018-07-05 | 2018-12-18 | 四川长虹电器股份有限公司 | A kind of multichannel light cat commissioning test system and its commissioning method for testing |
| CN109450732A (en) * | 2018-11-16 | 2019-03-08 | 郑州云海信息技术有限公司 | A kind of test method, device, terminal and the storage medium of analog optical fiber on-off |
| CN112235665A (en) * | 2020-10-26 | 2021-01-15 | 北京信而泰科技股份有限公司 | Test method, device and system of optical network unit |
-
2016
- 2016-07-29 CN CN201620807940.6U patent/CN206542537U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039445A (en) * | 2018-07-05 | 2018-12-18 | 四川长虹电器股份有限公司 | A kind of multichannel light cat commissioning test system and its commissioning method for testing |
| CN109039445B (en) * | 2018-07-05 | 2020-06-30 | 四川长虹电器股份有限公司 | Multi-channel optical modem debugging and testing system and debugging and testing method thereof |
| CN109450732A (en) * | 2018-11-16 | 2019-03-08 | 郑州云海信息技术有限公司 | A kind of test method, device, terminal and the storage medium of analog optical fiber on-off |
| CN112235665A (en) * | 2020-10-26 | 2021-01-15 | 北京信而泰科技股份有限公司 | Test method, device and system of optical network unit |
| CN112235665B (en) * | 2020-10-26 | 2022-10-21 | 北京信而泰科技股份有限公司 | Test method, device and system of optical network unit |
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