Symmetrical digital cable unbalance attenuation full-automatic test system and method

Abstract

The invention provides a full-automatic test system and method for unbalanced attenuation of a symmetric digital cable. Comprising control equipment, signal receiving and transmitting equipment and an unbalance attenuation full-automatic testing device, the control equipment is in communication connection with the unbalanced attenuation full-automatic test device so as to control the unbalanced attenuation full-automatic test device to switch the test ports; the control equipment is connected with the signal receiving and transmitting equipment so as to issue a test command to the signal receiving and transmitting equipment and receive test data sent by the signal receiving and transmitting equipment; the signal transceiving equipment is respectively connected with the unbalanced attenuation full-automatic testing device and the control equipment, one port of the signal transceiving equipment sends an excitation signal to the unbalanced attenuation full-automatic testing device, and the other port of the signal transceiving equipment receives test data output by the unbalanced attenuation full-automatic testing device and processes the test data; and the processed test data is transmitted to the control equipment. According to the invention, signal mode conversion and test channel switching can be automatically completed, and test data processing of the test machine can be automatically carried out on the to-be-detected cable.

Description

Technical Field

[0001] The present application relates to the field of communication testing technology, and in particular to a fully automatic testing system and method for unbalanced attenuation of a symmetrical digital cable. Background Art

[0002] Symmetrical digital cables work in balanced mode. The symmetry of symmetrical cable pairs is one of the important factors that cause unwanted signal interference. Unbalanced attenuation is an important parameter to measure the symmetry performance of cables.

[0003] At present, most of the existing symmetrical digital cable unbalanced attenuation test devices in China are manual test devices. The cable unbalanced attenuation test steps include connecting the tested line pairs to the test end in sequence, and also include converting the balanced signal into an unbalanced signal. The unbalanced signal has differential and common mode signals. The differential or common mode signal is manually connected to the signal transceiver according to different parameters. The traditional manual test method repeatedly connects, the operation steps are complicated, and the efficiency is low. Multiple connections will also have the problem of poor test stability. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present application is to provide a fully automatic testing system and method for symmetrical digital cable unbalanced attenuation, which is used to solve the technical problems of repeated access, complicated operation steps, low efficiency, and poor test stability caused by multiple access in traditional manual testing methods.

[0005] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides a symmetrical digital cable unbalanced attenuation fully automatic test system. The system includes: a control device, a signal transceiver device, and an unbalanced attenuation fully automatic test device; the control device is connected to the unbalanced attenuation fully automatic test device in communication to control the unbalanced attenuation fully automatic test device to switch the test port; the control device is connected to the signal transceiver device, the control device sends a test command to the signal transceiver device, and receives the test data sent by the signal transceiver device; the signal transceiver device is connected to the unbalanced attenuation fully automatic test device and the control device respectively, one port of the signal transceiver device sends an excitation signal to the unbalanced attenuation fully automatic test device, and the other port of the signal transceiver device receives the test data output by the unbalanced attenuation fully automatic test device, and processes the test data to transmit the processed test data to the control device; the test data includes differential data of the cable to be detected and common mode data of the cable to be detected.

[0006] In some embodiments of the first aspect of the present application, the unbalanced attenuation fully automatic testing device includes: a primary conversion switch group, a secondary conversion switch group, a balanced-to-unbalanced transformer and a cable clamp; wherein the cable to be tested is fixed and connected to the balanced-to-unbalanced transformer by the cable clamp; the balanced-to-unbalanced transformer outputs the common-mode data of the cable to be tested and the differential data of the cable to be tested, and transmits the common-mode data and the differential data to the signal transceiver device through the primary conversion switch group and the secondary conversion switch group.

[0007] In some embodiments of the first aspect of the present application, the primary conversion switch is used to control the output of the common-mode data and the differential data from the remote port and / or the proximal port; the secondary conversion switch is used to control the receiving port for receiving the common-mode data and the differential data.

[0008] In some embodiments of the first aspect of the present application, the transfer switches in the primary transfer switch group are all 1×2 coaxial switches, and the transfer switches in the secondary transfer switch group are all 1×4 coaxial switches.

[0009] In some embodiments of the first aspect of the present application, the first-level conversion switch group includes: a first-level proximal conversion switch group and a first-level remote conversion switch group; the second-level conversion switch group includes: a second-level proximal conversion switch group and a second-level remote conversion switch group; each conversion switch in the second-level conversion switch group is connected to four of the balanced-unbalanced converters; the first-level proximal conversion switch group is connected to a common interface end of the second-level proximal conversion switch group, and the first-level remote conversion switch group is connected to a common interface end of the second-level remote conversion switch group; the first-level proximal conversion switch group is also connected to the first-level remote conversion switch group.

[0010] In some embodiments of the first aspect of the present application, the secondary proximal conversion switch group includes two secondary proximal conversion switches; the secondary remote conversion switch group includes two secondary remote conversion switches; one of the secondary proximal conversion switches is connected to the common-mode output port of the proximal balun, and the other of the secondary proximal conversion switches is connected to the differential output port of the proximal balun; one of the secondary remote conversion switches is connected to the common-mode output port of the remote balun, and the other of the secondary remote conversion switch is connected to the differential output port of the remote balun.

[0011] In some embodiments of the first aspect of the present application, the cable clamp can connect a four-pair symmetrical digital cable, and the cable clamp includes a proximal cable clamp and a distal cable clamp; the proximal cable clamp is connected to the digital cable at the proximal end of the symmetrical digital cable and connected to the balanced-to-unbalanced transformer at the proximal end; the distal cable clamp is connected to the digital cable at the distal end of the symmetrical digital cable and connected to the balanced-to-unbalanced transformer at the distal end.

[0012] In some embodiments of the first aspect of the present application, the test port of the balun is connected one-to-one to the cable fixture, and the common-mode output port and the differential output port of the balun are not connected to the same switch in the secondary switch group.

[0013] In some embodiments of the first aspect of the present application, the signal transceiver device is a network analyzer.

[0014] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides a symmetrical digital cable unbalanced attenuation fully automatic test method, using the symmetrical digital cable unbalanced attenuation fully automatic test system provided by any one of the first aspects of the present application. The method includes: fixing the cable to be tested by the cable clamp; acquiring the test data of the cable to be tested based on the balanced unbalanced transformer; controlling the switching of the primary conversion switch group and the secondary conversion switch group by the control device to send the test data to the signal transceiver device through the proximal port and / or through the distal port, processing the test data by the signal transceiver device, and transmitting the processed test data to the control device.

[0015] As described above, the symmetrical digital cable unbalanced attenuation fully automatic testing system and method of the present application has the following beneficial effects:

[0016] First, the fully automatic test system and method for unbalanced attenuation of symmetrical digital cables of the present application can automatically complete signal mode conversion and test channel switching. The system can automatically test the cable to be tested and process the output test data.

[0017] Second, the fully automatic testing system and method for unbalanced attenuation of symmetrical digital cables of the present application optimizes the detection process, shortens the process time, can effectively reduce the labor cost of equipment testing, improve equipment testing efficiency, reduce personnel operations and improve test stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a structural schematic diagram of a symmetrical digital cable unbalanced attenuation fully automatic testing system of the present application.

[0019] Figure 2Shown is a schematic structural diagram of the unbalanced attenuation fully automatic testing device of the present application.

[0020] Figure 3 Shown is a schematic diagram of a scene of an electronic device in an embodiment of the present application.

[0021] Figure 4 Shown is a schematic flow chart of a fully automatic testing method for unbalanced attenuation of a symmetrical digital cable of the present application.

[0022] Component number description

[0023] 11. Cell Phone

[0024] 12 Tablet

[0025] 13 Laptop

[0026] 10 Symmetrical digital cable unbalanced attenuation fully automatic test system

[0027] 101 Control Equipment

[0028] 102 Signal transceiver equipment

[0029] 103 Unbalanced attenuation fully automatic test device

[0030] Steps S1 to S3 DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0033] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0034] Cable unbalanced attenuation test is an important method to measure the performance of symmetrical communication cables. It is mainly used to evaluate the degree of uneven reduction in signal strength due to cable impedance mismatch, signal reflection or crosstalk during signal transmission.

[0035] When conducting cable unbalanced attenuation tests, a series of strict steps need to be followed to ensure the accuracy and reliability of the test results. Currently, most symmetrical digital cable unbalanced attenuation test devices are manual test devices. The cable unbalanced attenuation test steps include connecting the tested line pairs to the test end in sequence, and converting the balanced signal into an unbalanced signal. The unbalanced signal has differential and common mode signals. The differential or common mode signal is manually connected to the signal transceiver device according to different parameters. The traditional manual test method repeatedly connects, the operation steps are complicated, and the efficiency is low. Multiple connections will also have the problem of poor test stability.

[0036] At least in view of the above problems, the present application provides a method for fully automatic testing of unbalanced attenuation of symmetrical digital cables. The method uses a balanced-unbalanced transformer and a coaxial switch that can output differential signals and common-mode signals to detect the cable to be detected, and transfers the test data to a signal transceiver for further data processing, and transmits the processed test data to the control device, and at the same time uses the control device to communicate with the unbalanced attenuation fully automatic testing device to control the coaxial switch of the unbalanced attenuation fully automatic testing device to achieve signal mode conversion and automatic switching of test channels.

[0037] Next, the symmetrical digital cable unbalanced attenuation fully automatic testing system and method provided by the present application will be described by way of specific embodiments in combination with the accompanying drawings.

[0038] See also Figure 1 to Figure 2 An embodiment of the present application provides an automatic test system for unbalanced attenuation of a symmetrical digital cable, which is used to test the degree of uneven reduction in signal strength caused by cable impedance mismatch, signal reflection or crosstalk during the transmission of the signal in the cable to be tested.

[0039] The symmetrical digital cable unbalanced attenuation automatic test system 10 of the present application includes: a control device 101 , a signal transceiver device 102 , and an unbalanced attenuation fully automatic test device 103 .

[0040] Among them, the control device 101 is communicatively connected with the unbalanced attenuation fully automatic test device 103 to control the unbalanced attenuation fully automatic test device 103 to switch the test port; the control device 101 is connected with the signal transceiver device 102, the control device 101 sends a test command to the signal transceiver device 102, and receives the test data sent by the signal transceiver device 102; the signal transceiver device 102 is respectively connected with the unbalanced attenuation fully automatic test device 103 and the control device 101, one port of the signal transceiver device 102 sends an excitation signal to the unbalanced attenuation fully automatic test device 103, and the other port of the signal transceiver device 102 receives the test data output by the unbalanced attenuation fully automatic test device, and processes the test data to transmit the processed test data to the control device 101; the test data includes differential data of the cable to be detected and common mode data of the cable to be detected.

[0041] In some implementations, the unbalanced attenuation fully automatic testing device 103 includes: a primary conversion switch group, a secondary conversion switch group, a balanced-to-unbalanced transformer and a cable clamp; wherein the cable to be tested is fixed by the cable clamp and connected to the balanced-to-unbalanced transformer; the balanced-to-unbalanced transformer outputs the common-mode data of the cable to be tested and the differential data of the cable to be tested, and transmits the common-mode data and the differential data to the signal transceiver device 102 through the primary conversion switch group and the secondary conversion switch group.

[0042] In some implementations, the primary conversion switch is used to control the output of the common mode data and the differential data from the remote port and / or the near-end port; the secondary conversion switch is used to control the receiving port that receives the common mode data and the differential data.

[0043] In some implementations, the primary conversion switch group includes: a primary proximal conversion switch group and a primary remote conversion switch group; the secondary conversion switch group includes: a secondary proximal conversion switch group and a secondary remote conversion switch group; each conversion switch in the secondary conversion switch group is connected to four of the balanced-unbalanced converters; the primary proximal conversion switch group is connected to a common interface end of the secondary proximal conversion switch group, and the primary remote conversion switch group is connected to a common interface end of the secondary remote conversion switch group; the primary proximal conversion switch group is also connected to the primary remote conversion switch group.

[0044] like Figure 2As shown, the primary near-end conversion switch group includes: conversion switch K5, conversion switch K6; the primary far-end conversion switch group includes: conversion switch K7, conversion switch K8; the secondary near-end conversion switch group includes: conversion switch K1, conversion switch K2; the secondary far-end conversion switch group includes: conversion switch K3, conversion switch K4; the balanced-unbalanced converter includes: balanced-unbalanced converter BN1, balanced-unbalanced converter BN2, balanced-unbalanced converter BN3, balanced-unbalanced converter BN4, balanced-unbalanced converter BN5, balanced-unbalanced converter BN6, balanced-unbalanced converter BN7, balanced-unbalanced converter BN8, balanced-unbalanced converter BN9, balanced-unbalanced converter BN10, balanced-unbalanced converter BN111, balanced-unbalanced converter BN22, balanced-unbalanced converter BN33, balanced-unbalanced converter BN123, balanced-unbalanced converter BN13 N4, balanced-unbalanced transformer BF1, balanced-unbalanced transformer BF2, balanced-unbalanced transformer BF3, balanced-unbalanced transformer BF4; among them, balanced-unbalanced transformer BN1, balanced-unbalanced transformer BN2, balanced-unbalanced transformer BN3, balanced-unbalanced transformer BN4 are proximal balanced-unbalanced transformers, and balanced-unbalanced transformer BF1, balanced-unbalanced transformer BF2, balanced-unbalanced transformer BF3, balanced-unbalanced transformer BF4 are far-end balanced-unbalanced transformers.

[0045] In this embodiment, the balanced-unbalanced transformer includes: a test port, a differential output port and a common-mode output port; taking a proximal balanced-unbalanced transformer BN4 and a distal balanced-unbalanced transformer BF4 as examples: the differential output port of the proximal balanced-unbalanced transformer BN4 is D41, and the common-mode output port is C41, and the differential output port of the distal balanced-unbalanced transformer BF4 is D42, and the common-mode output port is C42.

[0046] In this embodiment, the conversion switch K1, the conversion switch K2, the conversion switch K3, and the conversion switch K4 are 1×4 coaxial switches; the conversion switch K5, the conversion switch K6, the conversion switch K7, and the conversion switch K8 are 1×2 coaxial switches.

[0047] In this embodiment, the states of the switching switches K1, K2, K3, and K4 are 0, 1, 2, 3, and 4, respectively indicating: not working, port 1 working, port 2 working, port 3 working, and port 4 working; the states of the switching switches K5, K6, K7, and K8 are 1 and 2, respectively indicating that port 1 and port 2 are working.

[0048] In some implementations, the cable clamp can be connected to a four-pair symmetrical digital cable, and the cable clamp includes a proximal cable clamp and a distal cable clamp, wherein the proximal cable clamp is connected to the proximal cable of the symmetrical digital cable, and the distal cable clamp is connected to the distal cable of the symmetrical digital cable.

[0049] Specifically, the test port of balun BN1, the test port of balun BN2, the test port of balun BN3, and the test port of balun BN4 are respectively connected to the proximal cable clamp to be further connected to the proximal cable of the symmetrical digital cable; the test port of balun BF1, the test port of balun BF2, the test port of balun BF3, and the test port of balun BF4 are respectively connected to the distal cable clamp to be further connected to the distal cable of the symmetrical digital cable.

[0050] Specifically, the common-mode output port C11 of the balun BN1, the common-mode output port C21 of the balun BN2, the common-mode output port C31 of the balun BN3, and the common-mode output port C41 of the balun BN4 are respectively connected to port No. 1, port No. 2, port No. 3, and port No. 4 of the conversion switch K2; the differential output port D11 of the balun BN1, the differential output port D21 of the balun BN2, the differential output port D31 of the balun BN3, and the differential output port D41 of the balun BN4 are respectively connected to port No. 1, port No. 2, port No. 3, and port No. 4 of the conversion switch K1. port; the common-mode output port C12 of the balun BF1, the common-mode output port C22 of the balun BF2, the common-mode output port C32 of the balun BF3, and the common-mode output port C42 of the balun BF4 are respectively connected to port No. 1, port No. 2, port No. 3, and port No. 4 of the conversion switch K4; the differential output port D12 of the balun BF1, the differential output port D22 of the balun BF2, the differential output port D32 of the balun BF3, and the differential output port D42 of the balun BF4 are respectively connected to port No. 1, port No. 2, port No. 3, and port No. 4 of the conversion switch K3.

[0051] Specifically, the common port of the conversion switch K2 is connected to the common port of the conversion switch K6, the common port of the conversion switch K1 is connected to port No. 1 of the conversion switch K5, port No. 1 of the conversion switch K6 is connected to port No. 2 of the conversion switch K5, and the common port output of the conversion switch K5 is a proximal port; the common port of the conversion switch K3 is connected to port No. 2 of the conversion switch L8, the common port of the conversion switch K4 is connected to port No. 1 of the conversion switch K8, the common port of the conversion switch K8 is connected to port No. 2 of the conversion switch K7, port No. 1 of the conversion switch K7 is connected to port No. 2 of the conversion switch K6, and the common port output of the conversion switch K7 is a distal port.

[0052] In some implementations, the signal transceiver device 102 is a network analyzer, and the network analyzer is used to receive test data output by the far-end port and / or the near-end port.

[0053] like Figure 1 As shown, the signal transceiver device 102 includes a p1 port and a p2 port, wherein the p1 port is communicatively connected to the common port of the conversion switch K5 to receive the test data output from the proximal port, and the p2 port is communicatively connected to the common port of the conversion switch K7 to receive the test data output from the distal port.

[0054] In some implementations, the control device 101 may be a mobile phone, tablet computer, laptop computer, computer, etc. with communication function.

[0055] The fully automatic test method for unbalanced attenuation of symmetrical digital cables of the present application can be applied to Figure 3 The electronic device described in this application may include a mobile phone 11 with wireless charging function, a tablet computer 12, a laptop computer 13, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The embodiments of this application do not impose any restrictions on the specific types of electronic devices.

[0056] For example, the electronic device may be a station (STAION, ST) in a WLAN with a wireless charging function, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with a wireless charging function, a computing device or other processing device, a computer, a laptop computer, a handheld communication device, a handheld computing device, and / or other devices for communicating on a wireless system and a next-generation communication system, etc.

[0057] For example, the electronic device can communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobilecommunication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), BT, GNSS, WLAN, NFC, FM, and / or IR technology.

[0058] To facilitate understanding of the embodiments of the present application, first Figure 4 Detailed description. Figure 4 The flowchart of a fully automatic test method for unbalanced attenuation of a symmetrical digital cable in an embodiment of the present application is shown. The prediction method in this embodiment mainly includes steps S1 to S3.

[0059] Step S1, fixing the cable to be tested by using the cable clamp.

[0060] In this embodiment, the cable to be detected is a symmetrical digital cable, the proximal cable of the cable to be detected is fixed to the proximal cable clamp in the cable clamps, and the distal cable of the cable to be detected is fixed to the distal cable clamp in the cable clamps.

[0061] Step S2: Acquire test data of the cable to be tested based on the balun.

[0062] In this embodiment, the cable to be detected fixed to the cable clamp is connected to a proximal balun and a distal balun, respectively, to convert a balanced signal of the cable to be detected into an unbalanced signal.

[0063] Specifically, the balun receives an excitation signal sent by the signal transceiver device, converts the received excitation signal into a balanced signal and sends it to the cable to be tested, the cable to be tested receives the balanced signal sent by the balun and feeds back the balanced signal to the balun, and the balun converts the received balanced signal into an unbalanced signal; wherein the unbalanced signal converted by the balun is the test data.

[0064] Step S3, controlling the switching of the primary conversion switch group and the secondary conversion switch group by the control device to send the test data to the signal transceiver device through the proximal port and / or through the distal port, processing the test data by the signal transceiver device to transmit the processed test data to the control device.

[0065] In this embodiment, based on the fixed position of the cable to be tested, the control instruction of the control device is received to switch the primary switch group and the secondary switch group to the corresponding ports, so that the test data is output through the proximal port and / or the distal port and sent to the corresponding receiving port of the signal transceiver device for analysis and detection by the signal transceiver device.

[0066] Specifically, the test data includes common-mode data and differential-mode data. The control device controls the switching of the primary conversion switch group and the secondary conversion switch group according to the type of data that needs to be tested by the signal transceiver device, so as to send the common-mode data and / or the differential-mode data to the signal transceiver device through the proximal port and / or through the distal port.

[0067] Specifically, the signal transceiver device compares and calculates the difference between the received common mode data and / or differential mode data and the emitted excitation signal, thereby detecting the cable to be detected, and sending the detected data to the control device.

[0068] In this embodiment, the control device has a display function, and the signal transceiver device is also connected to the control device for communication so as to send the analysis and detection results to the control device and display them.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0070] In summary, the fully automatic test system and method for unbalanced attenuation of symmetrical digital cables provided by the present application, first, the fully automatic test system and method for unbalanced attenuation of symmetrical digital cables of the present application can automatically complete the signal mode conversion and the switching of the test channels. The system can automatically test the cable to be tested and process the output test data. Second, the fully automatic test system and method for unbalanced attenuation of symmetrical digital cables of the present application optimizes the detection process, shortens the process time, can effectively reduce the labor cost of equipment testing, improve equipment testing efficiency, reduce personnel operations and improve test stability. Therefore, the present application effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0071] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A fully automatic test system for unbalanced attenuation of symmetrical digital cables, characterized in that: The system includes: control equipment, signal transceiver equipment, and unbalanced attenuation fully automatic test device; The control device is in communication connection with the unbalanced attenuation fully automatic test device to control the unbalanced attenuation fully automatic test device to switch the test port; The control device is connected to the signal transceiver device, the control device sends a test command to the signal transceiver device, and receives test data sent by the signal transceiver device; The signal transceiver device is connected to the unbalanced attenuation fully-automatic test device and the control device respectively, one port of the signal transceiver device sends an excitation signal to the unbalanced attenuation fully-automatic test device, and the other port of the signal transceiver device receives the test data output by the unbalanced attenuation fully-automatic test device and processes the test data to transmit the processed test data to the control device; the test data includes differential data of the cable to be detected and common mode data of the cable to be detected.

2. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 1 is characterized in that: The unbalanced attenuation fully automatic test device comprises: a primary conversion switch group, a secondary conversion switch group, a balanced-unbalanced converter and a cable fixture; wherein, The cable to be tested is fixed by the cable clamp and connected to the balun; The balanced-unbalanced transformer outputs the common-mode data of the cable to be detected and the differential data of the cable to be detected, and transmits the common-mode data and the differential data to the signal transceiver device through the primary conversion switch group and the secondary conversion switch group.

3. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 2 is characterized in that: The primary conversion switch is used to control the common mode data and the differential data to be output from the remote port and / or the near end port; the secondary conversion switch is used to control the receiving port for receiving the common mode data and the differential data.

4. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 3 is characterized in that: The conversion switches in the primary conversion switch group are all 1×2 coaxial switches, and the conversion switches in the secondary conversion switch group are all 1×4 coaxial switches.

5. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 4 is characterized in that: The primary transfer switch group includes: a primary near-end transfer switch group and a primary far-end transfer switch group; the secondary transfer switch group includes: a secondary near-end transfer switch group and a secondary far-end transfer switch group; Each of the conversion switches in the secondary conversion switch group is connected to four of the baluns; The primary proximal transfer switch group is connected to the common interface end of the secondary proximal transfer switch group, and the primary remote transfer switch group is connected to the common interface end of the secondary remote transfer switch group; The primary proximal switching switch group is also connected to the primary distal switching switch group.

6. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 5, characterized in that: The secondary proximal transfer switch group includes two secondary proximal transfer switches; the secondary remote transfer switch group includes two secondary remote transfer switches; One of the secondary proximal transfer switches is connected to a common-mode output port of the proximal balun, and the other secondary proximal transfer switch is connected to a differential output port of the proximal balun; One of the two-level remote transfer switches is connected to a common-mode output port of the remote balun, and the other of the two-level remote transfer switches is connected to a differential output port of the remote balun.

7. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 2, characterized in that: The cable clamp can be connected to a four-pair symmetrical digital cable, and the cable clamp includes a proximal cable clamp and a distal cable clamp; The proximal cable clamp is connected to the digital cable at the proximal end of the symmetrical digital cable and is connected to the balun at the proximal end; The remote cable clamp is connected to the digital cable at the remote end of the symmetrical digital cable and is connected to the balun at the remote end.

8. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 2, characterized in that: The test port of the balun is connected to the cable fixture one-to-one, and the common mode output port and the differential output port of the balun are not connected to the same conversion switch in the secondary conversion switch group.

9. The symmetrical digital cable unbalanced attenuation fully automatic test system according to claim 1, characterized in that: The signal transceiver device is a network analyzer, and the network analyzer is used to receive test data output by the far-end port and / or the near-end port.

10. A fully automatic test method for unbalanced attenuation of a symmetrical digital cable, using the fully automatic test system for unbalanced attenuation of a symmetrical digital cable according to any one of claims 1 to 9, characterized in that: The method comprises: Fixing the cable to be tested by means of the cable clamp; Acquiring test data of the cable to be detected based on the balanced-unbalanced transformer; The control device controls the switching of the primary conversion switch group and the secondary conversion switch group to send the test data to the signal transceiver device through the proximal port and / or through the distal port, and the test data is processed by the signal transceiver device to transmit the processed test data to the control device.

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