阅读说明：本技术 一种测试大对数线缆缆间串扰的方法及装置 (A kind of method and device for testing crosstalk between big logarithm cable cable ) 是由 江斌 涂建坤 龚江疆 张�成 杨永东 于 2018-05-23 设计创作，主要内容包括：本发明提供一种大对数线缆缆间串扰测试的方法及装置,方法包括将待测电缆进行标记,对标记后的电缆做直线成束处理,形成电缆组,所述电缆组包括一根中心电缆以及均匀分布在中线电缆周围的外围电缆；将处理好的待测电缆的两端的每组线对分别接入近端和远端接线导槽,其中待测电缆近端与远端接线导槽中的电缆的线对顺序一一对应；通过切换每根待测电缆的近端和远端分别接入测试仪,实现待测电缆的串扰测试；本发明可以在不改变现有设备的前提下进行,实现任意两根电缆间的缆间串扰测试,在能够保证测试数据准确的前提下,能够大大提高对数测试设备的性价比,测试频率可以到达1G满足7A测试标准。(The present invention provides the method and device that crosstalk between a kind of big logarithm cable cable is tested, method includes that cable under test is marked, the processing of straight line bunchy is done to the cable after label, forms cable group, the cable group includes a center cable and the peripheral cable that is evenly distributed on around middle line cable；By every group of line at the both ends for the cable under test handled well to proximally and distally wiring guide groove is respectively connected to, wherein the line of cable under test proximal end and the cable in distal lugs guide groove corresponds sequence；It is proximally and distally respectively connected to tester by every cable under test of switching, realizes the crosstalk test of cable under test；The present invention can carry out under the premise of not changing existing equipment, crosstalk is tested between realizing the cable between any two cables, under the premise of can guarantee that test data is accurate, the cost performance of logarithm test equipment can be greatly improved, test frequency can reach 1G and meet 7A testing standard.)

1. a kind of method for testing crosstalk between big logarithm cable cable characterized by comprising

Cable under test is marked；

The processing of straight line bunchy is done to the cable after label, forms cable group, the cable group is including a center cable and The even peripheral cable being distributed in around middle line cable；

By every group of line at the both ends for the cable under test handled well to proximally and distally wiring guide groove is respectively connected to, wherein cable under test The line of cable in proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to tester by every cable under test of switching, realizes the crosstalk test of cable under test.

2. the method for crosstalk between the big logarithm cable cable of test according to claim 1, it is characterised in that: the crosstalk test Including near-end cross test and far-end cross talk test, test parameter, institute are obtained by near-end cross test and far-end cross talk test Stating test parameter includes outer portion near end cross-talk, outer distal end cross-talk, outer portion near end crosstalk attenuation ratio, outer distal end crosstalk attenuation Than and outer portion near end sound decaying specific power and outer distal end crosstalk attenuation specific power and outer portion near end crosstalk volume and and outer Portion's far-end crosstalk power and.

3. the method for crosstalk between the big logarithm cable cable of test according to claim 1, it is characterised in that: by the periphery electricity Cable is equidistantly fixed between peripheral cable and center cable as main string cable using the center cable as by string cable.

4. the method for crosstalk between the big logarithm cable cable of test according to claim 3, it is characterised in that: by the cable group It is laid within the scope of preset spacing threshold, or in the periphery setting support cable of the cable group, passes through cable group It supports cable to form parallelogram sturcutre, is wound laying.

5. the method for crosstalk between the big logarithm cable cable of test according to claim 2, it is characterised in that:

By successively by the cable proximal end of same label wired local interface docked into tester, distal end institute it is wired To the remote interface of access tester, obtain wired pair of attenuation test result；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable proximal end P-wire to the remote interface for being linked into tester, obtain the near-end cross talk crosstalk measuring knot of peripheral cable center line cable Fruit；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable distal end P-wire to the remote interface for being linked into tester, obtain the far-end cross talk crosstalk measuring knot of peripheral cable center line cable Fruit.

6. the method for crosstalk between the big logarithm cable cable of test according to claim 5, it is characterised in that: tester will be accessed Non- tested one end access terminal matching impedance of the tested cable of device, the nominal characteristic impedance of the terminal coupling impedance and line pair Modulus value is equal.

7. the method for crosstalk between the big logarithm cable cable of test according to claim 4, it is characterised in that: the peripheral cable Quantity be 6, it is described support cable quantity be 2, the support cable and peripheral cable formation parallelogram sturcutre.

8. crosstalk device between a kind of big logarithm cable cable of test characterized by comprising

Fixed cell forms cable group, the cable group includes in one for doing the processing of straight line bunchy to the cable after label N-conductor cable n and the peripheral cable being evenly distributed on around middle line cable；

Test cell, for testing for the cable under test to access；

Fixture, including proximally and distally, the line at the both ends for the cable under test for being respectively used to and handling well is to connection, wherein electricity to be measured The line of cable in cable proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to test cell by every cable under test in switching fixture, completes the string of cable under test Disturb test.

9. crosstalk device between the big logarithm cable cable of test according to claim 7, which is characterized in that further include balanced transformation Device carries out nominal impedance matching for balance ports impedance and to tested cable.

Technical field

The present invention relates to wire and cable field more particularly to a kind of methods and dress for testing crosstalk between big logarithm cable cable It sets.

Background technique

With the rapid development of computer technology and network technology, the high speed of data transmission, security reliability are more and more It being valued by people, the demand driving in market data transmit main carriers --- further development of optical cable, due to The fast development of symmetrical category cables more and more extensive use and local area network itself in a local network is to communication cable The harsh performance requirement of proposition, makes cable manufacturer more and more pay attention to the detection means of cable.And increasingly increased intelligence The number of information terminal produces the increase in demand to big pair count cable.Big logarithm cable for digital communication has paving with respect to optical cable If the advantages that convenient, cable-management is succinct, at low cost, therefore many comprehensive wiring systems are at present or big logarithm is selected in preparation Transmission medium of the cable for digital communication as riser backbone subsystem.The high speed development of information digitalization has expedited the emergence of big logarithm digital communication The appearance of cable.And will continue to develop to the direction of high-speed, big logarithm from now in digital cable, meanwhile, to its performance It also proposed high requirement, the performance of big pair count cable is often the bottleneck for limiting data transmission.

Currently, the cable manufacturer of world's most countries is all proposed big pair count cable product.Domestic manufacturer Largely introduce such production line or spontaneous development such production line.In the development and manufacture of big pair count cable, only pass through and When, the correct every actual performance index for grasping cable, and adjusting process can just produce qualified big logarithm number electricity in time Cable.This just needs advanced test product that can be competent at the test of big logarithm digital cable, but such test product state at present Inside and outside big logarithm test equipment is at high price, and is tested using the method that method of substitution etc. less standardizes, and undoubtedly will affect The quality of produced cable also has a adverse impact to the technological progress of domestic cable industry.Therefore, it is necessary to a kind of new to be Technological means can reduce as far as possible the cost of test equipment under the premise of guaranteeing measuring accuracy to improve cost performance, To drive symmetrical category cables industry to develop to higher level direction, to General Promotion China symmetrical category cables The integral level of industry plays positive impetus.

Summary of the invention

In view of the foregoing deficiencies of prior art, the present invention provides a kind of side for testing crosstalk between big logarithm cable cable Method, to solve the above technical problems.

The method of crosstalk between the big logarithm cable cable of test provided by the invention, comprising:

Cable under test is marked,

The processing of straight line bunchy is done to the cable after label, forms cable group, the cable group include center cable with And it is evenly distributed on the peripheral cable around middle line cable；

By every group of line at the both ends for the cable under test handled well to proximally and distally wiring guide groove is respectively connected to, wherein to be measured The line of cable in cable proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to tester by every cable under test of switching, realizes that the crosstalk of cable under test is surveyed Examination.

Further, crosstalk test includes near-end cross test and far-end cross talk test, by near-end cross test and Far-end cross talk test obtains test parameter, and the test parameter includes outer portion near end crosstalk attenuation, outer distal end crosstalk attenuation, outer Portion distal end attenuation to crosstalk ratio, outer portion near end and outer distal end crosstalk attenuation power and outer portion near end crosstalk volume and and outside Far-end crosstalk power and.

Further, using the peripheral cable as main string cable, using the center cable as by string cable, peripheral cable It is equidistantly fixed between center cable.

Further, cable group progress is subjected to circulation laying within the scope of preset spacing threshold, or in the electricity The periphery setting support cable of cable group, makes cable group form the overall structure for being easy to wind by support cable, is wound paving If.

Further, by successively by the cable proximal end of same label wired local interface docked into tester, Distal end wired remote interface docked into tester, obtain wired pair of attenuation test result；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable The p-wire of proximal end obtains the near-end cross talk crosstalk measuring of peripheral cable center line cable to the remote interface for being linked into tester As a result；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable The p-wire of distal end obtains the far-end cross talk crosstalk measuring of peripheral cable center line cable to the remote interface for being linked into tester As a result.

Further, non-tested one end access terminal matching impedance of the tested cable of test equipment, the terminal will be accessed Matching impedance is equal with the nominal characteristic impedance modulus value of line pair.

Further, the quantity of the peripheral cable be 6, it is described support cable quantity be 2, the support cable and Peripheral cable forms parallelogram sturcutre.

The present invention also provides crosstalk devices between a kind of big logarithm cable cable of test, comprising:

Fixed cell forms cable group, the cable group includes one for doing the processing of straight line bunchy to the cable after label Root center cable and the peripheral cable being evenly distributed on around middle line cable；

Test cell, for testing for the cable under test to access；

Fixture, including proximally and distally, the line at the both ends for the cable under test for being respectively used to and handling well to connection, wherein to The line for surveying the cable in cable proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to test cell by every cable under test in switching fixture, completes cable under test Crosstalk test.

Further, further include balance converter, carry out nominal impedance matching for balance ports impedance and to tested cable

Beneficial effects of the present invention: the method for crosstalk between the big logarithm cable cable of test in the present invention can not change It is carried out under the premise of existing equipment, crosstalk is tested between realizing the cable between any two cables, can guarantee that test data is accurate Under the premise of, the cost performance of logarithm test equipment can be greatly improved, test frequency can reach 1G and meet 7A testing standard, lead to Crossing the present invention can drive symmetrical category cables industry to develop to higher level direction, to General Promotion China symmetrical figure The integral level of communication cable industry has positive impetus.

Detailed description of the invention

Fig. 1 be the embodiment of the present invention test outer portion near end cross-talk between big logarithm cable cable in the method for crosstalk test it is former Manage schematic diagram.

Fig. 2 be the embodiment of the present invention test outer distal end cross-talk between big logarithm cable cable in the method for crosstalk test it is former Manage schematic diagram.

Fig. 3 is the section signal for the bunched cables that the embodiment of the present invention is tested between big logarithm cable cable in the method for crosstalk Figure.

Fig. 4 is the test scene cloth for the bunched cables that the embodiment of the present invention is tested between big logarithm cable cable in the method for crosstalk Set schematic diagram.

Fig. 5 is that the bunched cables that the embodiment of the present invention is tested between big logarithm cable cable in the method for crosstalk are placed on drum Test scene arrangement schematic diagram.

Fig. 6 is the structural schematic diagram that the embodiment of the present invention tests crosstalk device between big logarithm cable cable.

Fig. 7 is that the embodiment of the present invention tests signal between big logarithm cable cable in crosstalk method to unshielded cable processing Figure.

Fig. 8 is that the embodiment of the present invention is tested between big logarithm cable cable in crosstalk method to the schematic diagram of total shielded cable.

Fig. 9 is that the embodiment of the present invention is tested between big logarithm cable cable in crosstalk method to the schematic diagram of total score shielded cable.

Specific embodiment

Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation Feature in example can be combined with each other.

It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel It is likely more complexity.

As shown in Figure 1, between the big logarithm cable cable of test in the present embodiment crosstalk method, comprising:

Cable under test is marked,

The processing of straight line bunchy is done to the cable after label, forms cable group, the cable group include center cable with And it is evenly distributed on the peripheral cable around middle line cable；

By every group of line at the both ends for the cable under test handled well to proximally and distally wiring guide groove is respectively connected to, wherein to be measured The line of cable in cable proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to tester by every cable under test of switching, realizes that the crosstalk of cable under test is surveyed Examination.

In the present embodiment, first well in advance should be needed to mark on every cable before test, these cables should be using the same as all one's life Produce batch, the both ends of cable under test should be fanned out to, be fanned out to length should no more than 1m, measurement should in frequency range as defined in cable into Row.Test principle is that 1 as main string cable around center of peripheral 6 cables carries out (hereinafter referred to as 1+6) by string cable. Main string cable is successively tested with centrally located by string cable in order.It may be implemented to go here and there between the cable between any two cables Test is disturbed, by the replacement of different cables, the test of crosstalk between 4*7 (1000M) cable is finally realized, exports crosstalk between complete cable Test report.

In the present embodiment, the crosstalk test includes near-end cross test and far-end cross talk test, passes through near-end cross Test and far-end cross talk test obtain test parameter, and the test parameter includes outer portion near end crosstalk attenuation, outer distal end cross-talk Decaying, outer distal end attenuation to crosstalk ratio, outer portion near end and outer distal end crosstalk attenuation power and outer portion near end crosstalk volume and with And outer distal end crosstalk volume and.

Outer portion near end crosstalk attenuation (AFEXT) be expressed as respectively in different cables it is main get lines crossed to the proximal end got lines crossed pair Crosstalk attenuation is indicated by following formula:

Wherein, ANEXT is outer portion near end crosstalk attenuation, and unit is decibel (dB)；The input work got lines crossed based on P1N to proximal end Rate, unit are milliwatt (mW)；P2N is being the cross-talk output power got lines crossed to proximal end, and unit is milliwatt (mW)；Note: main to get lines crossed pair From got lines crossed to need to be distributed in two different cables.

The difference that outer distal end attenuation to crosstalk ratio (AACR-F) is being expressed as outer distal end crosstalk attenuation and is being got lines crossed to decaying, It is indicated by following formula:

Wherein, AFEXT is outer distal end crosstalk attenuation, and unit is decibel (dB)；The input work got lines crossed based on P1N to proximal end Rate, unit are milliwatt (mW)；P2F is being the cross-talk output power got lines crossed to distal end, and unit is milliwatt (mW).

The difference that outer distal end attenuation to crosstalk ratio (AACR-F) is being expressed as outer distal end crosstalk attenuation and is being got lines crossed to decaying, It is indicated by following formula:

AACR-F=AFEXT- α × l (formula 3)

Wherein, AACR-F is outer distal end attenuation to crosstalk ratio, and unit is decibel (dB)；AFEXT is that outer distal end cross-talk declines Subtract, unit is decibel (dB)；α is being the attenuation constant got lines crossed pair, and unit is dB/ unit length；α × l is being to be got lines crossed to declining Depreciation, unit are decibel (dB).

It outer portion near end and outer distal end crosstalk attenuation power and is indicated by following formula:

PSAX-talkj be line to the alien crosstalk power of j and, unit is decibel (dB)；

AX-talki, j, l be specified cable line to the line of j and adjacent cable to the crosstalk attenuation between i, unit is point Shellfish (dB)；J is being the number got lines crossed pair；The number got lines crossed based on i pair；The number of string cable based on l；That gets lines crossed based on n pair is total Quantity；The total quantity of string cable based on N.

As shown in Fig. 2, 7 cables are carried out the straight line bunchy in whole length in the present embodiment, the structure of 1+6 is formed. Cable should keep straight during bunchy, not reverse, and uniformly be carried out equidistantly with insulating tape or other similar bands It ties up, the overall structure of cable must not be destroyed, while the appropriateness between cable and cable being kept to be bonded again, it is preferable that the present embodiment In tie up between be divided into 200mm.After cable sample ties up bunchy, it should be placed by defined requirement before test, under setting has State two kinds:

Mode one: circulation laying is carried out by the scene requirement of Fig. 4, circulation minimum spacing should be not less than 100mm, be laid with place It should select nonmetallicly.

Mode two: bundles of cable is wrapped in diameter and is at least on 1.2 meters of wood strip disk, as shown in figure 5, this mode Need the cable of 9 same production batch.Wherein center cable is surrounded by 1#-6# cable, i.e., tested cross-talk cable.7#, 8# electricity Cable is test support cable.When winding, by 8#, 5#, 4# are as first layer, and 6#, V#, 3# is as the second layer, 1#, 2#, 7# conduct Third layer, 9 cables are wound shoulder to shoulder as a whole.

In the present embodiment, it is also necessary to to unshielded cable (UTP), total shielded cable (FTP) and total separated-shielding electricity Beginning, the end of cable (STP) carry out corresponding access processing: sheath are peelled off, as shown in Fig. 7,8,9, it is preferable that the protection peelled off Cover 3.8~4.2cm；The insulation 4cm or so for peelling off twisted pair again guarantees that shielded layer is not destroyed for there is shielded cable.

In the present embodiment, the cable twisted pair handled well is inserted into the wiring guide groove of proximal end and distal end in order respectively, Bare wire is fixed on fixture insertion.The line of proximal end and distal end will correspond (i.e. if a, b of proximal end 1# slot sequence End is respectively connected to white, blue line pair, then the end a, b of corresponding distal end 1# slot also accordingly connects white, blue line pair the other end).

In the present embodiment, as shown in fig. 6, in the present embodiment, by successively by the institute of the cable proximal end of same label The local interface of wired pair of access tester, distal end wired remote interface docked into tester, obtain institute it is wired right Attenuation test result；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable The p-wire of proximal end obtains the near-end cross talk crosstalk measuring of peripheral cable center line cable to the remote interface for being linked into tester As a result；

By successively by the p-wire of each peripheral cable proximal end to the local interface for being connected to tester, by center cable The p-wire of distal end obtains the far-end cross talk crosstalk measuring of peripheral cable center line cable to the remote interface for being linked into tester As a result.

Correspondingly, the present embodiment also provides a kind of crosstalk device between testing big logarithm cable cable, comprising:

Fixed cell forms cable group, the cable group includes one for doing the processing of straight line bunchy to the cable after label Root center cable and the peripheral cable being evenly distributed on around middle line cable；

Test cell, for testing for the cable under test to access；

Fixture, including proximally and distally, the line at the both ends for the cable under test for being respectively used to and handling well to connection, wherein to The line for surveying the cable in cable proximal end and distal lugs guide groove corresponds sequence；

It is proximally and distally respectively connected to test cell by every cable under test in switching fixture, completes cable under test Crosstalk test.

Further include balance converter in the present embodiment, carries out nominal impedance for balance ports impedance and to tested cable The test cell of matching, the present embodiment uses vector network analyzer, when test equipment does not have balanced signal processing function, Balance ports are converted by the uneven port of test equipment by balance converter, while realizing balance ports impedance and being tested The matching of cable nominal impedance.

The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should be covered by the claims of the present invention.