Standard applicator for cat 6a near-end crosstalk

Abstract

The application provides a standard device applied to CAT 6A near-end crosstalk, which converts an RJ45 interface into eight common SMA connectors by using a special fixture, and a differential circuit is arranged in the fixture, and the conversion of impedance is realized through the operation of the differential circuit, so that the calibration of the near-end crosstalk between the wire pairs can be realized, the high-cost impedance converter in the prior art is omitted, the conventional SMA connector is used, cost can be saved, and large-scale popularization and application are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of cable analyzers, and in particular to a standard device applied to CAT 6A near-end crosstalk. Background Art

[0002] A network cable analyzer is an essential analytical instrument used for preliminary network cabling installation, subsequent troubleshooting, and network maintenance. It is used to certify cabling systems and ensure that connectivity and transmission performance indicators meet local, national, or international standards. To ensure accurate and reliable network cabling quality testing, network cable analyzers must be calibrated / verified. Parameters tested on network cable analyzers include near-end crosstalk (NEXT), equivalent NEXT, far-end crosstalk (FEXT), equivalent FEXT, insertion loss, propagation delay, and length. Of these, NEXT, a unique parameter of network cable analyzers, is one of the most critical and must be correctly calibrated.

[0003] Near-end crosstalk (NEXT) refers to the signal coupling caused by electromagnetic induction between a transmitting wire pair on one side of a cable and the adjacent (receiving) wire pairs on the same side. The measurement principle is that the analyzer sends a signal from one wire pair. When the signal is transmitted along the cable, the analyzer captures the crosstalk component on an adjacent wire pair on the same side. The measurement principle diagram is shown below. Figure 1 shown.

[0004] Figure 2 This is a block diagram of the calibration principle structure of a near-end crosstalk in the prior art, which refers to the JJF 1494 standard. Specifically, it includes a network cable analyzer 11, an impedance converter 12 and a precision step attenuator 13, which are used to test the near-end crosstalk from 1,2 line pairs to 3,6 line pairs, and are connected to the precision step attenuator 13 through the impedance converter 12.

[0005] Although the above-mentioned near-end crosstalk calibration device in the prior art can also calibrate the near-end crosstalk between line pairs, the impedance converter 12 device is relatively expensive and is limited by the purchase restrictions of high-performance baluns, which makes the JJF 1494 impedance converter difficult to implement, especially in large-scale testing and verification. Summary of the Invention

[0006] The present invention aims to at least partially address one of the aforementioned technical issues or to provide a useful commercial alternative. To this end, the present invention proposes a standard for CAT 6A near-end crosstalk. The standard converts an RJ45 interface into eight common SMA connectors using a custom fixture. The fixture includes a differential circuit that converts impedances through operations. This not only calibrates near-end crosstalk between wire pairs, but also eliminates the high-cost impedance converters typically used in existing technologies. Furthermore, the use of conventional SMA connectors reduces costs and facilitates large-scale application.

[0007] According to the present invention, a standard device for CAT 6A near-end crosstalk includes an RJ45, and the RJ45 includes at least one first signal twisted pair and one second signal twisted pair, wherein the first signal twisted pair is used to transmit a first source signal and a second source signal, and the second signal twisted pair is used to transmit a third source signal and a fourth source signal;

[0008] A fixture connected to the RJ45, the fixture comprising at least one first signal line pair connector and a second signal line pair connector, wherein the first signal line pair connector is electrically connected to the first signal twisted pair, and the second signal line pair connector is electrically connected to the second signal twisted pair, the fixture further comprising a first differential amplifier circuit and a second differential amplifier circuit, the first differential amplifier circuit being configured to perform a differential operation on the first source signal and the second source signal to convert the impedance of the first signal twisted pair, and the second differential amplifier circuit being configured to perform a differential operation on the third source signal and the fourth source signal to convert the impedance of the second signal twisted pair;

[0009] a first attenuator electrically connected to the first signal line connector;

[0010] The second attenuator is electrically connected to the second signal wire pair connector. The second attenuator and the first attenuator are used to detect the near-end crosstalk value of the first signal twisted pair to the second signal twisted pair.

[0011] The present invention is a standard device for CAT 6A near-end crosstalk. The standard device converts an RJ45 interface into eight common SMA connectors by using a special fixture. The fixture is provided with a differential circuit. Impedance conversion is achieved through the operation of the differential circuit. This not only realizes the calibration of near-end crosstalk between line pairs, but also eliminates the high-cost impedance converter in the prior art. In addition, the use of conventional SMA connectors can save costs and facilitate large-scale promotion and application.

[0012] In addition, the standard device for CAT 6A near-end crosstalk according to the present invention may also have the following additional technical features:

[0013] The fixture includes a mainboard, which is electrically connected to the RJ45. The mainboard is also provided with multiple SMA connectors, which are electrically connected to the mainboard. The first signal line pair connectors include a first SMA connector and a second SMA connector, and the second signal line pair connectors include a third SMA connector and a fourth SMA connector.

[0014] The first end of the first attenuator is electrically connected to the first SMA connector, and the second end of the first attenuator is electrically connected to the third SMA connector; the first end of the second attenuator is electrically connected to the second SMA connector, and the second end of the second attenuator is electrically connected to the fourth SMA connector.

[0015] The first end of the first attenuator is electrically connected to the first SMA connector via a first SMA connector wire, and the second end of the first attenuator is electrically connected to the third SMA connector via a second SMA connector wire; the first end of the second attenuator is electrically connected to the second SMA connector via a third SMA connector wire, and the second end of the second attenuator is electrically connected to the fourth SMA connector via a fourth SMA connector wire.

[0016] The RJ45 includes a transmitting signal twisted pair, a receiving signal twisted pair, a first spare signal twisted pair and a second spare signal twisted pair; the SMA connector includes a transmitting signal SMA connector pair, a receiving signal SMA connector pair, a first spare signal SMA connector pair and a second spare signal SMA connector pair, wherein the transmitting signal twisted pair is electrically connected to the transmitting signal SMA connector pair, the receiving signal twisted pair is electrically connected to the receiving signal SMA connector pair, the first spare signal twisted pair is electrically connected to the first spare signal SMA connector pair, and the second spare signal twisted pair is electrically connected to the second spare signal SMA connector pair.

[0017] The transmitting signal twisted pair includes a transmitting positive signal twisted pair and a transmitting negative signal twisted pair, the receiving signal twisted pair includes a receiving positive signal twisted pair and a receiving negative signal twisted pair, the first spare signal twisted pair includes a first spare signal twisted pair and a second spare signal twisted pair, and the second spare signal twisted pair includes a third spare signal twisted pair and a fourth spare signal twisted pair.

[0018] The transmitting signal SMA connector pair includes a transmitting positive signal SMA connector and a transmitting negative signal SMA connector, the receiving signal SMA connector pair includes a receiving positive signal SMA connector and a receiving negative signal SMA connector, the first backup signal SMA connector pair includes a first backup signal SMA connector and a second backup signal SMA connector, and the second backup signal SMA connector pair includes a third backup signal SMA connector and a fourth backup signal SMA connector.

[0019] The transmitting positive signal SMA connector, transmitting negative signal SMA connector, receiving positive signal SMA connector, receiving negative signal SMA connector, first backup signal SMA connector, second backup signal SMA connector, third backup signal SMA connector, and fourth backup signal SMA connector are all arranged on the side of the mainboard, and the distance between every two adjacent SMA connectors is equal.

[0020] The attenuation value set by the first attenuator is equal to the attenuation value set by the second attenuator.

[0021] The first attenuator and the second attenuator include coaxial attenuators.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of a near-end crosstalk measurement principle in the prior art;

[0025] Figure 2 This is a block diagram of the calibration principle of near-end crosstalk in the prior art;

[0026] Figure 3 This is a block diagram of the calibration principle of near-end crosstalk according to an embodiment of the present invention;

[0027] Figure 4 1 is a structural diagram of a clamp according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0029] Figure 3 This is a block diagram of the calibration principle of near-end crosstalk according to an embodiment of the present invention; Figure 4 1 is a structural diagram of a clamp according to an embodiment of the present invention. Figure 3-Figure 4 The present invention provides a standard device for CAT 6A near-end crosstalk, which is used to calibrate the near-end crosstalk between twisted pair wires.

[0030] CAT 6A stands for Augmented Category 6 Cable. Twisted pair cable is the most commonly used transmission medium in integrated wiring projects. It is composed of two copper wires with an insulating protective layer. The two insulated copper wires are twisted together at a certain density. The radio waves radiated by each wire during transmission will be offset by the radio waves emitted by the other wire, effectively reducing the degree of signal interference.

[0031] refer to Figure 3 、 Figure 4 The standard device for CAT 6A near-end crosstalk of the present invention includes an RJ45 100, a fixture 200, a first attenuator 300 and a second attenuator 400.

[0032] RJ45 (Registered Jack 45) 100 is a type of information socket connector in a wiring system. The connector consists of a plug (connector, crystal head) and a socket (module). The plug has 8 grooves and 8 contacts. The connector composed of these two components is connected between wires to achieve electrical continuity of the wires.

[0033] RJ45 100 includes at least a first signal twisted pair and a second signal twisted pair, wherein the first signal twisted pair is used to transmit a first source signal and a second source signal, and the second signal twisted pair is used to transmit a third source signal and a fourth source signal. For example, RJ45 100 includes at least a transmitting signal twisted pair and a receiving signal twisted pair, wherein the transmitting signal twisted pair further includes a transmitting positive signal twisted pair and a transmitting negative signal twisted pair, and the receiving signal twisted pair further includes a receiving positive signal twisted pair and a receiving negative signal twisted pair. The transmitting positive signal twisted pair is used to transmit the first source signal, such as an S+ signal; the transmitting negative signal twisted pair is used to transmit the second source signal, such as an S- signal; the receiving positive signal twisted pair is used to transmit the third source signal, such as an R+ signal; and the receiving negative signal twisted pair is used to transmit the fourth source signal, such as an S- signal. In other embodiments, RJ45 100 also includes spare signal twisted pairs, such as two sets of spare signal twisted pairs.

[0034] The fixture 200 is connected to the RJ45 100 and includes at least one first signal line pair connector and one second signal line pair connector. The first signal line pair connector is electrically connected to the first signal twisted pair, and the second signal line pair connector is electrically connected to the second signal twisted pair. Specifically, the first signal twisted pair of the RJ45 100 is electrically connected to the first signal line pair connector of the fixture 200, and the second signal twisted pair of the RJ45 100 is electrically connected to the second signal line pair connector of the fixture 200, thereby achieving an electrical connection between the RJ45 100 and the fixture 200.

[0035] The fixture 200 also includes a first differential amplifier circuit and a second differential amplifier circuit, wherein the first differential amplifier circuit is configured to perform a differential operation on the first source signal and the second source signal to convert the impedance of the first signal twisted pair. Specifically, the first differential amplifier circuit and the second differential amplifier circuit can be integrated on the fixture 200. The first differential amplifier circuit is configured to perform a differential operation on the S+ signal transmitted by the positive signal transmitting twisted pair and the S- signal transmitted by the negative signal transmitting twisted pair to convert the impedance between the positive signal transmitting twisted pair and the negative signal transmitting twisted pair. For example, if the impedance of the positive signal transmitting twisted pair and the negative signal transmitting twisted pair are both 50Ω, the first differential amplifier circuit performs differential processing on the S+ signal and the S- signal, namely, calculates the difference between the S+ signal and the S- signal, thereby measuring the S+ signal and the S- signal together, equivalently measuring the two input signals S+ and S- together, and achieving the effect of combined conversion. Using the same method, a second differential amplifier circuit performs a differential operation on the R+ signal and the R- signal to convert the impedance of the second signal twisted pair. The present invention's standard for CAT 6A near-end crosstalk achieves impedance conversion by providing a differential circuit and utilizing a differential circuit calculation method, thereby saving costs compared to the prior art's use of more expensive impedance converters.

[0036] The first attenuator 300 is electrically connected to the first signal line pair connector of the fixture 200, and the second attenuator 400 is electrically connected to the second signal line pair connector of the fixture 200. The second attenuator 400 cooperates with the first attenuator 300 to detect the near-end crosstalk value of the first signal twisted pair of the RJ45 100 with respect to the second signal twisted pair. Specifically, the first signal line pair connector of the fixture 200 is connected to the first signal twisted pair of the RJ45 100 and the first attenuator 300, respectively, and the second signal line pair connector of the fixture 200 is connected to the second signal twisted pair of the RJ45 100 and the second attenuator 400, respectively. This achieves calibration and verification of the near-end crosstalk value from the first signal twisted pair of the RJ45 100 to the second signal twisted pair, avoiding the high cost and disadvantages of using impedance converters in the prior art that are not conducive to large-scale promotion.

[0037] In the specific implementation, refer to Figure 4 The fixture 200 includes a mainboard 210, which is used to electrically connect to the RJ45100. In a specific implementation, the plastic skin of the outer layer of the twisted pair of the RJ45 100 can be peeled off, and then the exposed copper wire inside can be soldered and fixed to the gold fingers of the mainboard 210, thereby realizing the electrical connection between the mainboard 210 and the RJ45 100.

[0038] The motherboard 210 is provided with a plurality of SMA (SubMiniature version A) connectors, which are also electrically connected to the motherboard 210. A first signal line connector and a second signal line connector are also provided on the motherboard 210. The first signal line connector includes a first SMA connector 221 and a second SMA connector 222, and the second signal line connector includes a third SMA connector 223 and a fourth SMA connector 224. Specifically, the first SMA connector 221, the second SMA connector 222, the third SMA connector 223, and the fourth SMA connector 224 can be fixedly or detachably mounted on the motherboard 210 and electrically connected to the motherboard 210. In this embodiment, the first SMA connector 221, the second SMA connector 222, the third SMA connector 223, and the fourth SMA connector 224 are also fixedly mounted on the motherboard 210 by welding and electrically connected to the motherboard 210.

[0039] In a specific implementation, the first end of the first attenuator 300 is electrically connected to the first SMA connector 221, and the second end of the first attenuator 300 is electrically connected to the third SMA connector 223. The first end of the second attenuator 300 is electrically connected to the second SMA connector 222, and the second end of the second attenuator 300 is electrically connected to the fourth SMA connector 224. The CAT 6A near-end crosstalk standard of the present invention electrically connects the two ends of the first attenuator 300 to the first SMA connector 221 and the third SMA connector 223, respectively, and the two ends of the second attenuator 300 to the second SMA connector 222 and the fourth SMA connector 224, respectively, thereby achieving calibration of the near-end crosstalk value from the first signal twisted pair to the second signal twisted pair of the RJ45 100 through the first attenuator 300 and the second attenuator 400.

[0040] In a specific implementation, the first end of the first attenuator 300 is electrically connected to the first SMA connector 221 via a first SMA connector cable, and the second end of the first attenuator 300 is electrically connected to the third SMA connector 223 via a second SMA connector cable. The first end of the second attenuator 400 is electrically connected to the second SMA connector 222 via a third SMA connector cable, and the second end of the second attenuator 400 is electrically connected to the fourth SMA connector 224 via a fourth SMA connector cable. Specifically, in the CAT 6A near-end crosstalk standard of the present invention, the first attenuator 300 is electrically connected to the two SMA connectors on the mainboard 210 via two SMA connector cables, thereby achieving electrical connection between the first attenuator 300 and the mainboard 210. Similarly, the second attenuator 400 is electrically connected to the two SMA connectors on the mainboard 210 via two SMA connector cables, thereby achieving electrical connection between the second attenuator 400 and the mainboard 210.

[0041] In the specific implementation, refer to Figure 4 , RJ45 100 includes a transmitting signal twisted pair, a receiving signal twisted pair, a first spare signal twisted pair, and a second spare signal twisted pair; the SMA connector includes a transmitting signal SMA connector pair, a receiving signal SMA connector pair, a first spare signal SMA connector pair, and a second spare signal SMA connector pair, wherein the transmitting signal twisted pair is electrically connected to the transmitting signal SMA connector pair, the receiving signal twisted pair is electrically connected to the receiving signal SMA connector pair, the first spare signal twisted pair is electrically connected to the first spare signal SMA connector pair, and the second spare signal twisted pair is electrically connected to the second spare signal SMA connector pair. Specifically, the CAT 6A near-end crosstalk standard of the present invention realizes the electrical connection between RJ45 100 and multiple SMA connectors by corresponding multiple signal twisted pair pairs of RJ45100 to multiple SMA connectors one by one, and facilitates the subsequent calibration of near-end crosstalk values ​​between different twisted pair pairs.

[0042] In a specific implementation, the transmitting signal twisted pair includes a transmitting positive signal twisted pair and a transmitting negative signal twisted pair, the receiving signal twisted pair includes a receiving positive signal twisted pair and a receiving negative signal twisted pair, the first backup signal twisted pair includes a first backup signal twisted pair and a second backup signal twisted pair, and the second backup signal twisted pair includes a third backup signal twisted pair and a fourth backup signal twisted pair. Specifically, in the present invention, each signal twisted pair includes two signal twisted pairs.

[0043] In the specific implementation, refer to Figure 4 The transmitting signal SMA connector pair includes a transmitting positive signal SMA connector 221 and a transmitting negative signal SMA connector 222. The receiving signal SMA connector pair includes a receiving positive signal SMA connector 223 and a receiving negative signal SMA connector 224. The first backup signal SMA connector pair includes a first backup signal SMA connector 225 and a second backup signal SMA connector 226. The second backup signal SMA connector includes a third backup signal SMA connector 227 and a fourth backup signal SMA connector 228. Figure 4 As can be seen, from the lower right corner of the main board 600 along the counterclockwise direction, the edge of the main board 600 is sequentially provided with a transmitting positive signal SMA connector 221, a transmitting negative signal SMA connector 222, a receiving positive signal SMA connector 223, a first backup signal SMA connector 225, a second backup signal SMA connector 226, a receiving negative signal SMA connector 224, a third backup signal SMA connector 227 and a fourth backup signal SMA connector 228.

[0044] In the specific implementation, refer to Figure 4The positive signal transmitting SMA connector 221, the negative signal transmitting SMA connector 222, the positive signal receiving SMA connector 223, the negative signal receiving SMA connector 224, the first backup signal SMA connector 225, the second backup signal SMA connector 226, the third backup signal SMA connector 227, and the fourth backup signal SMA connector 228 are all disposed on the side of the mainboard 210, and the distance between each two adjacent SMA connectors is equal. Specifically, the CAT 6A near-end crosstalk standard of the present invention facilitates electrical connection between different SMA connectors and the first attenuator 300 and the second attenuator 400 by evenly disposing eight SMA connectors at equal intervals on the side of the mainboard 210, thereby avoiding poor connection between the SMA connectors and the first attenuator 300 and / or the second attenuator 400 due to the close distance between two adjacent SMA connectors.

[0045] In a specific implementation, the attenuation value set for the first attenuator 300 is equal to the attenuation value set for the second attenuator 400. Specifically, in one embodiment of the present invention, for example, to test the near-end crosstalk value from the transmit signal twisted pair to the receive signal twisted pair of the RJ45 100, the first attenuator 300 and the second attenuator 400 are respectively connected between the transmit positive signal SMA connector 221 and the receive positive signal SMA connector 223, and between the transmit negative signal SMA connector 222 and the receive negative signal SMA connector 224, and the attenuation values ​​of the first attenuator 300 and the second attenuator 400 are set to be consistent, and set to the simulated value of the near-end crosstalk, thereby achieving near-end crosstalk calibration from the transmit signal twisted pair to the receive signal twisted pair.

[0046] In a specific implementation, the first attenuator 300 and the second attenuator 400 include coaxial attenuators. In this embodiment, the first attenuator 300 and the second attenuator 400 can be configured as coaxial attenuators, for example, a coaxial attenuator manufactured by Narda and model number AS-SMA-25-1-50. In other embodiments, the first attenuator 300 and the second attenuator 400 can also be configured as attenuators of other specifications, such as a displacement optical attenuator.

[0047] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A standard for CAT 6A near-end crosstalk, characterized in that: include: RJ45, the RJ45 includes at least a first signal twisted pair and a second signal twisted pair, wherein the first signal twisted pair is used to transmit a first source signal and a second source signal, and the second signal twisted pair is used to transmit a third source signal and a fourth source signal; A fixture connected to the RJ45, the fixture comprising at least one first signal line pair connector and a second signal line pair connector, wherein the first signal line pair connector is electrically connected to the first signal twisted pair, and the second signal line pair connector is electrically connected to the second signal twisted pair, the fixture further comprising a first differential amplifier circuit and a second differential amplifier circuit, the first differential amplifier circuit being configured to perform a differential operation on the first source signal and the second source signal to convert the impedance of the first signal twisted pair, and the second differential amplifier circuit being configured to perform a differential operation on the third source signal and the fourth source signal to convert the impedance of the second signal twisted pair; a first attenuator electrically connected to the first signal line connector; The second attenuator is electrically connected to the second signal wire pair connector. The second attenuator and the first attenuator are used to detect the near-end crosstalk value of the first signal twisted pair to the second signal twisted pair.

2. The standard device for CAT 6A near-end crosstalk according to claim 1, characterized in that: The fixture includes a mainboard, which is electrically connected to the RJ45. The mainboard is also provided with multiple SMA connectors, which are electrically connected to the mainboard. The first signal line pair connectors include a first SMA connector and a second SMA connector, and the second signal line pair connectors include a third SMA connector and a fourth SMA connector.

3. The standard device for CAT 6A near-end crosstalk according to claim 2, characterized in that: The first end of the first attenuator is electrically connected to the first SMA connector, and the second end of the first attenuator is electrically connected to the third SMA connector; the first end of the second attenuator is electrically connected to the second SMA connector, and the second end of the second attenuator is electrically connected to the fourth SMA connector.

4. The standard device for CAT 6A near-end crosstalk according to claim 3, characterized in that: The first end of the first attenuator is electrically connected to the first SMA connector via a first SMA connector wire, and the second end of the first attenuator is electrically connected to the third SMA connector via a second SMA connector wire; the first end of the second attenuator is electrically connected to the second SMA connector via a third SMA connector wire, and the second end of the second attenuator is electrically connected to the fourth SMA connector via a fourth SMA connector wire.

5. The standard device for CAT 6A near-end crosstalk according to claim 2, characterized in that: The RJ45 includes a transmitting signal twisted pair, a receiving signal twisted pair, a first spare signal twisted pair and a second spare signal twisted pair; the SMA connector includes a transmitting signal SMA connector pair, a receiving signal SMA connector pair, a first spare signal SMA connector pair and a second spare signal SMA connector pair, wherein the transmitting signal twisted pair is electrically connected to the transmitting signal SMA connector pair, the receiving signal twisted pair is electrically connected to the receiving signal SMA connector pair, the first spare signal twisted pair is electrically connected to the first spare signal SMA connector pair, and the second spare signal twisted pair is electrically connected to the second spare signal SMA connector pair.

6. The standard device for CAT 6A near-end crosstalk according to claim 5, characterized in that: The transmitting signal twisted pair includes a transmitting positive signal twisted pair and a transmitting negative signal twisted pair, the receiving signal twisted pair includes a receiving positive signal twisted pair and a receiving negative signal twisted pair, the first spare signal twisted pair includes a first spare signal twisted pair and a second spare signal twisted pair, and the second spare signal twisted pair includes a third spare signal twisted pair and a fourth spare signal twisted pair.

7. The standard device for CAT 6A near-end crosstalk according to claim 6, characterized in that: The transmitting signal SMA connector pair includes a transmitting positive signal SMA connector and a transmitting negative signal SMA connector, the receiving signal SMA connector pair includes a receiving positive signal SMA connector and a receiving negative signal SMA connector, the first backup signal SMA connector pair includes a first backup signal SMA connector and a second backup signal SMA connector, and the second backup signal SMA connector pair includes a third backup signal SMA connector and a fourth backup signal SMA connector.

8. The standard device for CAT 6A near-end crosstalk according to claim 7, characterized in that: The transmitting positive signal SMA connector, transmitting negative signal SMA connector, receiving positive signal SMA connector, receiving negative signal SMA connector, first backup signal SMA connector, second backup signal SMA connector, third backup signal SMA connector, and fourth backup signal SMA connector are all arranged on the side of the mainboard, and the distance between every two adjacent SMA connectors is equal.

9. The standard device for CAT 6A near-end crosstalk according to claim 1, characterized in that: The attenuation value set by the first attenuator is equal to the attenuation value set by the second attenuator.

10. The standard device for CAT 6A near-end crosstalk according to any one of claims 1 to 9, characterized in that: The first attenuator and the second attenuator include coaxial attenuators.

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