CN110838873B - Test method based on MTP pretermination optical cable - Google Patents
Test method based on MTP pretermination optical cable Download PDFInfo
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- CN110838873B CN110838873B CN201810937970.2A CN201810937970A CN110838873B CN 110838873 B CN110838873 B CN 110838873B CN 201810937970 A CN201810937970 A CN 201810937970A CN 110838873 B CN110838873 B CN 110838873B
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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
- H04B10/07955—Monitoring or measuring power
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention relates to a testing method based on an MTP pretermination optical cable, which sequentially comprises the following steps: testing and determining an LC-LC reference jumper and an LC-LC test jumper; correcting test data of the optical power meter; determining a qualified LC-MTP test jumper wire to be used; testing of preterminated cable systems. According to the method, the data of the optical power meter is corrected through the determined reference jumper and the determined test jumper, the LC-MTP test jumper is selected under the same test system, and the optical cable pre-terminated by the MTP is tested according to the selected LC-MTP test jumper, so that the test is simple, fast and convenient, the optical cable is not damaged, and the test efficiency and the test data accuracy are greatly improved.
Description
Technical Field
The invention relates to the field of optical communication, in particular to a simple, convenient and quick test method based on an MTP pre-terminated optical cable with accurate test data.
Background
5G is used as a huge engine for driving the next 10 years of information industry and social economic development, and the construction mode of ultra-dense networking of the 5G is to directly pull the investment scale of the whole industrial chain of antenna, radio frequency, optical fiber cable, optical module, system integration and the like. When a current operator builds a base station, a remote optical cable assembly is mainly adopted from an optical fiber to the base station, a 1-2 core optical fiber is usually adopted between the RRU and the BBU as a communication channel, and 1 receiving and transmitting parallel channel is provided to be matched with the SFP optical module. However, as the requirement of 5G for the transmission rate and capacity of the carrier network increases, the conventional 2-core jumper cannot meet the requirement, so that it can be expected that the tendency that the multi-core MTP jumper is used for outdoor mobile communication will become more and more clear, and the MTP jumper is wear-resistant, flame-retardant, strong in tensile strength, and more suitable for outdoor environment or complex construction environment. On the other hand, the use of high density multi-fiber connectors (MTPs) can increase the number of antennas of a single base station, thereby increasing the communication capacity of a single base station. This also means that the MTP cable and its mating components will probably become the demand hot for the future 5G network construction. With the increasingly strong competition of the optical cable manufacturing industry, the optical cable manufacturing cost and the quality of optical cable products become outstanding problems for enterprise development, and the optical cable manufacturing cost and the quality of optical cable products serve as one of key indexes of optical cable quality: the detection, control and efficiency of the test of the optical fiber attenuation are always the bottleneck of the optical cable manufacturing enterprise, and the existing test method not only needs to be equipped with a large amount of test personnel to spend a large amount of time on coupling intervention, but also can damage the optical fiber, and can cause unqualified products to flow into the next process or even flow into the market due to errors generated by test data in the test system, thereby causing quality accidents and high economic compensation. Therefore, the traditional test method has the advantages of complex operation, easy error, low efficiency and low accuracy of test data in the field link loss test.
Disclosure of Invention
Aiming at the existing defects, the invention provides a simple, convenient and quick test method based on the MTP pretermination optical cable with accurate test data.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a test method based on MTP pretermination optical cable comprises the following steps:
(1) connecting a light source with an LC interface with an optical power meter by using an LC-LC jumper, testing and determining an LC-LC reference jumper and a plurality of LC-LC test jumpers;
(2) correcting test data of the optical power meter: correspondingly connecting the light source and the optical power meter with the LC-LC reference jumper wire and the LC-LC test jumper wire determined in the step (1), connecting the LC-LC reference jumper wire and the LC-LC test jumper wire with one LC-LC test jumper wire to form a test system with an LC connector pair, and correcting test data of the optical power meter by testing link loss;
(3) determining a qualified LC-MTP test jumper to be used: removing the LC-LC test jumper connected with the LC-LC reference jumper in the test system in the step (2), correspondingly connecting two multi-core LC-MTP test jumpers with pins to the LC-LC reference jumper connected with the light source and the LC-LC test jumper connected with the optical power meter through an optical fiber branch with the same color respectively, then connecting the MTP-MTP standard test jumper wire without pins at both ends between two LC-MTP test jumper wires with pins, testing the link loss of the optical fiber branch on the LC-MTP test jumper wire with pins, then the connection of the optical fiber branch is disconnected, and then the link loss of each optical fiber branch on the LC-MTP strip pin jumper is connected and tested in sequence, when the measured loss value of each optical fiber branch is not more than 1.5db, the LC-MTP test jumper in the test system is determined to be a qualified LC-MTP test jumper;
(4) and (3) testing the pre-terminated optical cable system, namely removing the MTP-MTP standard test jumper wire with no needle at two ends according to the test system in the step (3), connecting the MTP connectors without needles at two ends in the pre-terminated optical cable with the MTP connectors with needles on the LC-MTP test jumper wire, then sequentially connecting and disconnecting each optical fiber branch on the two LC-MTP test jumper wires with needles to the LC-LC reference jumper wire and the LC-LC test jumper wire, wherein the color of each connected optical fiber branch on the two LC-MTP test jumper wires is the same, and testing and recording the link loss measured value of each optical fiber branch when being connected, wherein the measured value is the link loss of each optical fiber branch.
Preferably, the method for testing and determining the LC-LC reference jumper and the LC-LC test jumper in the step (1) is as follows:
1) connecting an LC-LC jumper between the light source and the optical power meter;
2) reading and recording data of the optical power meter, and according to the IEC standard, determining a qualified LC-LC jumper when the data is less than 0.1db, and using the qualified LC-LC jumper as an LC-LC reference jumper;
3) and after the LC-LC reference jumper is determined, disconnecting the LC-LC reference jumper from the optical power meter and connecting another LC-LC jumper between the LC-LC reference jumper and the optical power meter, wherein the qualified LC-LC test jumper is determined when the test data of the optical power meter, namely the link loss value, is not more than the insertion loss values of LC connectors at two ends.
Preferably, when the link loss value of the test system in step (2) is not more than 1db, the optical power meter is zeroed or the reading of the optical power meter at the moment is recorded to correct the data tested by the optical power meter.
Preferably, the LC-MTP pinked test patch cord is a 12-core patch cord, in step (3), the test sequence is to start with a blue optical fiber branch, then orange, and then test other optical fiber branches in sequence according to the color sequence, and the color scale and code of each optical fiber branch in the connection state are the same when testing each optical fiber branch.
Preferably, the preterminated fiber optic cables are arranged by interconnection of MTP connectors.
Preferably, the MTP connectors are interconnected by mounting a distribution panel with MTP adapters in a 1U or 4U rack-mount distribution frame, the MTP connectors of the preterminated cables are connected to a back panel of the distribution panel, the front panel of the distribution panel is connected to MTP preterminated branch cables, and the other ends of the branch cables are connected to network equipment or other distribution panels.
The invention has the beneficial effects that: in the invention, the data of the optical power meter is corrected by the determined reference jumper wire and the test jumper wire, the LC-MTP test jumper wire with the needle is selected under the same test system, and the optical cable pre-terminated by the MTP is tested according to the selected LC-MTP test jumper wire with the needle, so that the test is simple and convenient, the optical cable is not damaged, and the test efficiency and the accuracy of the test data are greatly improved.
Drawings
FIG. 1 is a schematic diagram of the present invention for determining LC-LC reference jumpers;
FIG. 2 is a schematic diagram of the present invention for determining LC-LC test jumpers;
FIG. 3 is a schematic diagram of the calibration principle of the present invention for optical power meter test data;
FIG. 4 is a schematic diagram of the present invention for determining a qualified LC-MTP test jumper with pins;
FIG. 5 is a schematic diagram illustrating the testing principle of the link under test according to the present invention;
Detailed Description
For the purpose of more clearly illustrating the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, for clear and complete description, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The principle of the invention is shown in the block diagrams of fig. 1 to 5, and the testing method based on the MTP pretermination optical cable comprises the following steps:
(1) connecting a light source with an LC interface with an optical power meter by using an LC-LC jumper, testing and determining an LC-LC reference jumper and a plurality of LC-LC test jumpers, wherein the specific method in the step is as follows; as shown in fig. 1, 1) connect LC-LC jumpers between the light source and the optical power meter; 2) reading and recording data of the optical power meter, and according to the IEC standard, determining a qualified LC-LC jumper when the measured data is less than 0.1db, and taking the qualified LC-LC jumper as an LC-LC reference jumper; as shown in fig. 2, 3) after the LC-LC reference jumper is determined, disconnecting the LC-LC reference jumper from the optical power meter and connecting another LC-LC jumper between the LC-LC reference jumper and the optical power meter, when the test data of the optical power meter, i.e., the link loss value, is not greater than the insertion loss values of the LC connectors at both ends, the test data is a qualified LC-LC test jumper, if the measured loss value is greater than the insertion loss values of the LC connectors at both ends, the jumper is unqualified, another jumper needs to be replaced to retest to determine the qualified test jumper, and both the jumper is determined and the connectors are checked to ensure the accuracy of the subsequent test data;
(2) correcting test data of the optical power meter: as shown in fig. 3, the light source and the optical power meter are correspondingly connected with the LC-LC reference jumper and the LC-LC test jumper determined in step (1), and another LC-LC test jumper is connected with the LC-LC reference jumper and the LC-LC test jumper to form a test system with LC connector pairs, and then the test data of the optical power meter is corrected by testing the link loss, the test data change generated by the connection between the light source and the optical power meter from a single jumper to three jumpers represents the link loss generated by two connector pairs connected by three test jumpers, the link loss value of this test system needs to be guaranteed not more than 1db (i.e. the insertion loss value of the connector pairs), the maximum change in the measured value should be approximately 1db, and the maximum change in the measured value should be approximately 0.5db for each pair of two connectors, if the test value is greater than the reference value, cleaning the end face of the connector and retesting, if the test result is still larger, replacing the test jumper wire one by one until the test data is in a reasonable range, then pressing a zero-setting button of the optical power meter, wherein the power meter displays 0db, and if the zero-setting button is not arranged, the reading at the moment is recorded, and the value is subtracted from the subsequent link test result to obtain the final correct measurement value;
(3) determining a qualified LC-MTP test jumper to be used: as shown in fig. 4, in the test system of step (2), the LC-LC test jumper connected to the LC-LC reference jumper is removed, two multi-core LC-MTP test jumpers with pins are connected to the LC-LC reference jumper connected to the light source and the LC-LC test jumper connected to the optical power meter through an optical fiber branch of the same color, and then an MTP-MTP standard test jumper without pins at both ends is connected between the two LC-MTP test jumpers, so that it is ensured that the test jumpers have correct polarity, the link loss of the optical fiber branch on the LC-MTP test jumper is tested, then the connection of the optical fiber branch is disconnected, and then the link loss of each optical fiber branch on the test LC-MTP test jumper is connected in sequence, and when the measured loss value of each optical fiber branch is not greater than 1.5db, the LC-MTP test jumper in the test system is determined to be qualified LC-MTP test jumper Testing a jumper wire with a needle; the LC-MTP test jumper with the pin can be preferably a 12-core jumper, the MTP connector connected with the 12-core jumper can provide 4 transceiving parallel channels to be matched with a QSFP optical module, which is equivalent to expanding the base station by 4 times, the design of the base station is greatly optimized, the test sequence is that the test is started by a blue optical fiber branch, then the test is orange, then other optical fiber branches are sequentially tested according to the color sequence, the color scale and the code of each optical fiber branch in a connection state when each optical fiber branch is tested are the same, the optical power meter should display a negative value smaller than 1.5db in each test, at the moment, the optical power meter is not reset to zero, according to the specification when the MTP test jumper leaves a factory, the maximum value of the connection loss of one MTP connector pair is 0.75db, the maximum value of the connection loss of two connection pairs of the MTP jumper in the test system should be 1.5db, and after the performance of all connectors used in the test meets the specification requirements, confirming the performance of 12 LC optical fiber branches, then taking the MTP-to-MTP jumper wire without the needle out of the test system, and completing the confirmation of the whole test system, so that the test system can be used for testing the installation system;
(4) testing the pre-terminated optical cable system, as shown in fig. 5, the link to be tested is connected to the test system in step (3), the MTP-MTP standard test jumper with no pin at both ends is removed, the MTP connectors with no pin at both ends in the pre-terminated optical cable are connected to the MTP connectors with pin on the LC-MTP test jumper, then the connection between each optical fiber branch on the two LC-MTP test jumpers with pin and the LC-LC reference jumper and the LC-LC test jumper is sequentially connected and disconnected, the color of the optical fiber branch on each connection on the two LC-MTP test jumpers with pin is the same, the link loss measurement value of each optical fiber branch at the time of connection is tested and recorded, the measurement value is the link loss of each optical fiber branch, thus the data of the optical power meter is corrected by the determined reference jumper and test jumper, and the LC-MTP test jumper with pin is selected under the same test system, the MTP pre-terminated optical cable is tested according to the selected LC-MTP test jumper with the pin, the whole test is simple, rapid and convenient, the optical cable is not damaged, and the test efficiency and the test data accuracy are greatly improved.
In a further improvement, the preterminated cables are arranged by interconnecting MTP connectors, the MTP connectors are arranged by assembling a distribution panel with MTP adapters in a 1U or 4U rack-type distribution frame, the MTP connectors of the preterminated cables are connected to a back panel of the distribution panel, a front panel of the distribution panel is connected to MTP preterminated branch cables, and the other ends of the branch cables are connected to network equipment or other distribution panels. The MTP pre-terminated branch cable is a ribbon-like interconnection cable, both ends of which are usually terminated with MTP connectors or one section of which is terminated with a single-core connector, and the deployment method is particularly suitable for the application of parallel optical transmission, such as infiniBand technology, and the deployment method can be used as a test method for testing an MTP pre-terminated cable link just because a module with a single-core connector is not equipped, thereby greatly facilitating the connection between the cables and the test thereof.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A test method based on MTP pretermination optical cable comprises the following steps:
(1) connecting a light source with an LC interface with an optical power meter by using an LC-LC jumper, testing and determining an LC-LC reference jumper and a plurality of LC-LC test jumpers;
(2) correcting test data of the optical power meter: correspondingly connecting the light source and the optical power meter with the LC-LC reference jumper wire and the LC-LC test jumper wire determined in the step (1), connecting the LC-LC reference jumper wire and the LC-LC test jumper wire with one LC-LC test jumper wire to form a test system with an LC connector pair, and correcting test data of the optical power meter by testing link loss;
(3) determining a qualified LC-MTP test jumper to be used: removing the LC-LC test jumper connected with the LC-LC reference jumper in the test system in the step (2), correspondingly connecting two multi-core LC-MTP test jumpers with pins to the LC-LC reference jumper connected with the light source and the LC-LC test jumper connected with the optical power meter through an optical fiber branch with the same color respectively, then connecting the MTP-MTP standard test jumper wire without pins at both ends between two LC-MTP test jumper wires with pins, testing the link loss of the optical fiber branch on the LC-MTP test jumper wire with pins, then the connection of the optical fiber branch is disconnected, and then the link loss of each optical fiber branch on the LC-MTP strip pin jumper is connected and tested in sequence, when the measured loss value of each optical fiber branch is not more than 1.5db, the LC-MTP test jumper in the test system is determined to be a qualified LC-MTP test jumper;
(4) and (3) testing the pre-terminated optical cable system, namely removing the MTP-MTP standard test jumper wire with no needle at two ends according to the test system in the step (3), connecting the MTP connectors without needles at two ends in the pre-terminated optical cable with the MTP connectors with needles on the LC-MTP test jumper wire, then sequentially connecting and disconnecting each optical fiber branch on the two LC-MTP test jumper wires with needles to the LC-LC reference jumper wire and the LC-LC test jumper wire, wherein the color of each connected optical fiber branch on the two LC-MTP test jumper wires is the same, and testing and recording the link loss measured value of each optical fiber branch when being connected, wherein the measured value is the link loss of each optical fiber branch.
2. The MTP preterminated optical cable-based testing method of claim 1, wherein: the method for testing and determining the LC-LC reference jumper and the LC-LC test jumper in the step (1) comprises the following steps:
1) connecting an LC-LC jumper between the light source and the optical power meter;
2) reading and recording data of the optical power meter, and according to the IEC standard, determining a qualified LC-LC jumper when the data is less than 0.1db, and using the qualified LC-LC jumper as an LC-LC reference jumper;
3) and after the LC-LC reference jumper is determined, disconnecting the LC-LC reference jumper from the optical power meter and connecting another LC-LC jumper between the LC-LC reference jumper and the optical power meter, wherein the qualified LC-LC test jumper is determined when the test data of the optical power meter, namely the link loss value, is not more than the insertion loss values of LC connectors at two ends.
3. The MTP preterminated optical cable-based testing method of claim 1, wherein: and (3) when the link loss value of the test system is not more than 1db in the step (2), zeroing the optical power meter or recording the reading of the optical power meter at the moment to correct the data tested by the optical power meter.
4. The MTP preterminated optical cable-based testing method of claim 1, wherein: the LC-MTP test patch cord with the pins is a 12-core patch cord, in the step (3), the test sequence is that the test is started by a blue optical fiber branch, then the test is orange, then the test is performed on other optical fiber branches according to the color sequence, and the color code and the code of each optical fiber branch in the connection state are the same when each optical fiber branch is tested.
5. The MTP preterminated optical cable-based testing method of claim 1, wherein: the preterminated fiber optic cables are arranged by interconnection of MTP connectors.
6. The MTP preterminated optical cable-based testing method of claim 5, wherein: the interconnection of the MTP connectors is set by assembling a distribution panel with an MTP adapter in a 1U or 4U rack-type distribution frame, the MTP connector of the preterminated optical cable is connected to a back board of the distribution panel, a front board of the distribution panel is connected with an MTP preterminated branch optical cable, and the other end of the branch optical cable is connected with network equipment or other distribution panels.
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| CN201810937970.2A CN110838873B (en) | 2018-08-17 | 2018-08-17 | Test method based on MTP pretermination optical cable |
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| CN201810937970.2A CN110838873B (en) | 2018-08-17 | 2018-08-17 | Test method based on MTP pretermination optical cable |
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| CN112415684B (en) * | 2020-11-16 | 2022-09-20 | 武汉光迅科技股份有限公司 | Passive optical fiber cross wiring device |
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