CN205829909U - A kind of test system of GPON light cat - Google Patents
A kind of test system of GPON light cat Download PDFInfo
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- CN205829909U CN205829909U CN201620809138.0U CN201620809138U CN205829909U CN 205829909 U CN205829909 U CN 205829909U CN 201620809138 U CN201620809138 U CN 201620809138U CN 205829909 U CN205829909 U CN 205829909U
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- light cat
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Abstract
The utility model discloses the test system of a kind of GPON light cat, including Error Detector, OLT optical module, adjustable optical attenuator, wavelength division multiplexer, GPON light cat and PC terminal；The outfan of Error Detector is connected with OLT optical module, and the outfan of OLT optical module is connected with adjustable optical attenuator, and the outfan of adjustable optical attenuator is connected with wavelength division multiplexer, and wavelength division multiplexer is bi-directionally connected with GPON light cat, and GPON light cat is bi-directionally connected with PC terminal.This utility model GPON light cat in whole test process, it is not necessary to change optical fiber, effectively avoid the unfavorable factor brought in test process, add the stability of test, also improve testing efficiency.When carrying out the test of GPON light cat, directly testing GPON light cat, test result is accurate；Light cat is made a start and receiving end is separately tested, obtain pointedly and make a start and the test parameter of receiving end.
Description
Technical field
This utility model relates to the test system of a kind of GPON light cat.
Background technology
Society oneself enter the information age, people except to traditional phone, fax, data communication demand in addition to, again
Such as compunication, high data rate communication, video conferencing, e-mail and multimedia communication are proposed higher wanting
Ask；For the communication network of China, transmission network is through development in recent years, one-level, two grades of main lines and the local telephone network of big and medium-sized cities
Junction line achieves digitized, light fibrillation substantially；Switching network achieves programme-controlled, digitized the most substantially；Along with transmission network, exchange
The high speed development of net, necessarily promotes the fast development of access network；Light cat demand becomes larger, and improves testing efficiency and become to pass
Important.
But GPON light cat does not has SMA interface, it is impossible to connect Error Detector (BERT) by coaxial line and test, can only pass through
Intelligent acess, may cause end-face pollution and stability the highest, brings very big inconvenience also to the test of light cat；Application No.
" the test system of the upper ONU of a kind of light cat for EPON " of 201520192500.X, it is not necessary to light cat is direct with Error Detector
Connect and just light cat can be tested, in this patent, carried out from ring, the tune both ONU received by the main control chip of light cat
Signal processed is given to making a start of ONU again, and ONU is luminous, is returned to by light by optical branching device SPL and first wave division multiplexer WDM1
OLT, indirectly tests the sensitivity of ONU by the sensitivity of test OLT.
But this system also has some shortcomings: owing to this system is surveyed indirectly by the sensitivity of test OLT optical module
The sensitivity of examination ONU, test result is likely to be of some deviations, causes the inaccurate problem of test；Simultaneously because have passed through light
The main control chip of cat carries out from ring, and indirectly testing data out also can only embody makes a start 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, it is provided that the test system of a kind of GPON light cat, directly
Connecing and test GPON light cat, test result is accurate.
The purpose of this utility model is achieved through the following technical solutions: the test system of a kind of GPON light cat, bag
Include Error Detector, OLT optical module, adjustable optical attenuator, wavelength division multiplexer, GPON light cat and PC terminal；The outfan of Error Detector leads to
Crossing coaxial line to be connected with OLT optical module, the outfan of OLT optical module is connected with adjustable optical attenuator, adjustable optical attenuator defeated
Going out end to be connected with wavelength division multiplexer, wavelength division multiplexer is bi-directionally connected with GPON light cat, and GPON light cat is bi-directionally connected with PC terminal.
Described test system also includes optical branching device and spectroanalysis instrument；The input of described optical branching device is multiple with wavelength-division
Connecting with device, the first outfan of optical branching device is connected with spectroanalysis instrument.
Described test system also includes program control light power meter, and described program control light power meter is defeated with the second of optical branching device
Go out end to connect.
Described test system also includes sampling oscilloscope and clock and data recovery module, the input of described sampling oscilloscope
End is connected with the 3rd outfan of optical branching device；The input of clock and data recovery module by optical module and optical branching device the
Four outfans connect, and the outfan of clock and data recovery module is connected with sampling oscilloscope.
The beneficial effects of the utility model are: (1) GPON light cat in whole test process, it is not necessary to change optical fiber,
Effectively avoid the unfavorable factor brought in test process, add the stability of test, also improve testing efficiency.
(2) directly testing GPON light cat, test result is accurate.
(3) GPON light cat is made a start and receiving end is separately tested, obtain pointedly and make a start and the test ginseng of receiving end
Number.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model
It is not limited to the following stated.
As it is shown in figure 1, the test system of a kind of GPON light cat, (launch optical mode including Error Detector BERT, OLT optical module
Block), adjustable optical attenuator VOA, wavelength division multiplexer WDM, GPON light cat and PC terminal；The outfan of Error Detector BERT is by coaxial
Line is connected with OLT optical module, and the outfan of OLT optical module is connected with adjustable optical attenuator VOA, and adjustable optical attenuator VOA's is defeated
Going out end to be connected with wavelength division multiplexer WDM, wavelength division multiplexer WDM and GPON light cat is bi-directionally connected, and GPON light cat is two-way with PC terminal
Connect.
Described test system also includes optical branching device SPL and spectroanalysis instrument OSA；The input of described optical branching device SPL
End is connected first outfan of WDM, optical branching device SPL and is connected with spectroanalysis instrument OSA with wavelength division multiplexer.
Described test system also includes program control light power meter PM, described program control light power meter PM and optical branching device SPL
Second outfan connect.
Described test system also includes sampling oscilloscope DCA and clock and data recovery module CDR, described sampling oscilloscope
The input of DCA is connected with the 3rd outfan of optical branching device SPL；The input of clock and data recovery module CDR passes through optical mode
Block (reception optical module) is connected with the 4th outfan of optical branching device SPL, the outfan of clock and data recovery module CDR and sampling
Oscillograph DCA connects.
Operation principle of the present utility model is as follows: the receiving end test of GPON light cat: allow Error Detector BERT produce 2.488G
The modulated signal of PRBS23 is sent to OLT optical module, then is connected to GPON by adjustable optical attenuator VOA, wavelength division multiplexer WDM
Light cat,
The data of the signal that the PON MAC chip in GPON light cat receives GPON light cat and clock recovery out, and pass
Being passed to PC terminal test, in test process, the size being received light by regulation adjustable optical attenuator VOA regulation just can be surveyed
The sensitivity etc. of examination GPON light cat receives parameter.(further, if it is too small to receive light, cause the erroneous judgement of GPON light cat signal,
The meeting display of PC terminal currently has error code and the current bit error rate, if at this moment test result will show that NG receives light properly,
PC terminal can show currently without error code, and at this moment test result will show PASS).It is straight owing to the receiving end of GPON light cat is tested
Connect test, so, test result is accurate, and receiving end data are separate with originating data, it is possible to obtain receiving end number pointedly
According to.
The test of making a start of GPON light cat: allow the PONMAC chip in GPON light cat produce by the transmission instruction of PC terminal
The modulated signal of 1.244G PRBS23, and make GPON light cat be in long luminance；The light that optical branching device SPL passage 1 connects
Spectrometer 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 passage 2 connects is logical
Cross the luminous power of making a start testing GPON light cat later of calibration；The sampling oscilloscope DCA that optical branching device SPL passage 3 connects is permissible
Testing out eye pattern etc. to make a start parameter, optical branching device SPL passage 4 connects clock and data recovery mould by optical module (reception optical module)
Block CDR carries out recovering clock signals, is transferred to sampling oscilloscope DCA as sampling foundation.
Claims (4)
1. the test system of a GPON light cat, it is characterised in that: include Error Detector, OLT optical module, adjustable optical attenuator, ripple
Division multiplexer, GPON light cat and PC terminal；The outfan of Error Detector is connected with OLT optical module by coaxial line, OLT optical module
Outfan is connected with adjustable optical attenuator, and the outfan of adjustable optical attenuator is connected with wavelength division multiplexer, wavelength division multiplexer with
GPON light cat is bi-directionally connected, and GPON light cat is bi-directionally connected with PC terminal.
The test system of a kind of GPON light cat the most 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 described 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.
The test system of a kind of GPON light cat the most according to claim 1, it is characterised in that: described test system is also wrapped
Including program control light power meter, described program control light power meter is connected with the second outfan of optical branching device.
The test system of a kind of GPON light cat the most according to claim 1, it is characterised in that: described test system is also wrapped
Including sampling oscilloscope and clock and data recovery module, the input of described sampling oscilloscope connects with the 3rd outfan of optical branching device
Connect；The input of clock and data recovery module is connected with the 4th outfan of optical branching device by optical module, clock and data recovery
The outfan of module is connected with sampling oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620809138.0U CN205829909U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of GPON light cat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620809138.0U CN205829909U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of GPON light cat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205829909U true CN205829909U (en) | 2016-12-21 |
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| CN201620809138.0U Active CN205829909U (en) | 2016-07-29 | 2016-07-29 | A kind of test system of GPON light cat |
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Cited By (4)
| 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 |
| CN109754093A (en) * | 2018-12-13 | 2019-05-14 | 四川天邑康和通信股份有限公司 | A kind of smooth cat maintenance system and management method |
| CN110572298A (en) * | 2019-08-15 | 2019-12-13 | 苏州浪潮智能科技有限公司 | FC card-oriented automatic read-write performance testing method, system and equipment |
| CN110769334A (en) * | 2019-11-05 | 2020-02-07 | 珠海迈科智能科技股份有限公司 | Combination test method and system for passive optical fiber equipment |
-
2016
- 2016-07-29 CN CN201620809138.0U patent/CN205829909U/en active Active
Cited By (6)
| 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 |
| CN109754093A (en) * | 2018-12-13 | 2019-05-14 | 四川天邑康和通信股份有限公司 | A kind of smooth cat maintenance system and management method |
| CN109754093B (en) * | 2018-12-13 | 2021-04-09 | 四川天邑康和通信股份有限公司 | Optical modem maintenance system and management method |
| CN110572298A (en) * | 2019-08-15 | 2019-12-13 | 苏州浪潮智能科技有限公司 | FC card-oriented automatic read-write performance testing method, system and equipment |
| CN110769334A (en) * | 2019-11-05 | 2020-02-07 | 珠海迈科智能科技股份有限公司 | Combination test method and system for passive optical fiber equipment |
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