CN204190784U - A kind of ethernet signal test interface change-over circuit - Google Patents
A kind of ethernet signal test interface change-over circuit Download PDFInfo
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- CN204190784U CN204190784U CN201420721382.2U CN201420721382U CN204190784U CN 204190784 U CN204190784 U CN 204190784U CN 201420721382 U CN201420721382 U CN 201420721382U CN 204190784 U CN204190784 U CN 204190784U
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Abstract
The utility model relates to ethernet test technical field, provides a kind of ethernet signal test interface change-over circuit, and it comprises a RJ45 interface and the 2nd RJ45 interface, and a RJ45 interface is connected with the network terminal, and the 2nd RJ45 interface is connected with equipment under test; Also comprise the first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer, be connected with a described RJ45 interface and the 2nd RJ45 interface respectively, it also distinguishes connecting test equipment, thus simplify the complexity of traditional differential amplifier peripheral circuit, without the need to providing power supply for ethernet signal test interface change-over circuit, reduce circuit power consumption, reduce costs simultaneously.
Description
Technical field
The utility model belongs to ethernet test technical field, particularly relates to a kind of ethernet signal test interface change-over circuit.
Background technology
Developing rapidly of Internet technology makes the capacity of network interconnection apparatus, network interconnection, complexity constantly increases, and it is had higher requirement to the performance of network interconnection apparatus, network interconnection, and how the performance of measurement and assessment network interconnection apparatus, network interconnection becomes very important.
At present, most widely used Ethernet is 100 m ethernet and gigabit Ethernet, its transmission medium is all shielding or unshielded twisted pair, ethernet signal transmits with the form of four pairs of differential lines in twisted-pair feeder, thus adopt common oscilloprobe cannot obtain network data on twisted-pair feeder netting twine, need to pass through differential amplifier.
When using differential amplifier, the conversion accuracy of ethernet signal is high, gain controllable system, but the peripheral circuit of differential amplifier needs more components and parts, and circuit is more complicated, and needs, for it provides power supply, to cause extra power consumption.
Utility model content
The purpose of this utility model is to provide a kind of ethernet signal test interface change-over circuit, the peripheral circuit being intended to solve differential amplifier in prior art needs more components and parts, circuit is more complicated, and needs, for it provides power supply, to cause the problem of extra power consumption.
The utility model realizes like this, a kind of ethernet signal test interface change-over circuit, described ethernet signal test interface change-over circuit comprises a RJ45 interface and the 2nd RJ45 interface, and a described RJ45 interface is connected with the network terminal, and described 2nd RJ45 interface is connected with equipment under test;
Also comprise the first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer, be connected with a described RJ45 interface and the 2nd RJ45 interface respectively;
Described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer also distinguish connecting test equipment.
As a kind of improved plan, described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer are connected with described testing equipment respectively by the first coaxial cable connecting interface of correspondence, the second coaxial cable connecting interface, triaxial cable connecting interface and the 4th coaxial cable connecting interface.
As a kind of improved plan, a described RJ45 interface and the 2nd RJ45 interface are respectively equipped with the first line end, the second line end, the 3rd line end, the 4th line end, the 5th line end, the 6th line end, the 7th line end and the 8th line end;
Described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer are respectively equipped with first input end, the second input and output.
As a kind of improved plan, the first input end of described first Ba Lun transformer is connected with the connecting line between the first line end of a described RJ45 interface and the first line end of described 2nd RJ45 interface, and the second input of described first Ba Lun transformer is connected with the connecting line between the second line end of a described RJ45 interface and the second line end of described 2nd RJ45 interface.
As a kind of improved plan, the first input end of described second Ba Lun transformer is connected with the connecting line between the 3rd line end of a described RJ45 interface and the 3rd line end of described 2nd RJ45 interface, and the second input of described second Ba Lun transformer is connected with the connecting line between the 6th line end of a described RJ45 interface and the 6th line end of described 2nd RJ45 interface.
As a kind of improved plan, the first input end of described 3rd Ba Lun transformer is connected with the connecting line between the 4th line end of a described RJ45 interface and the 4th line end of described 2nd RJ45 interface, and the second input of described 3rd Ba Lun transformer is connected with the connecting line between the 5th line end of a described RJ45 interface and the 5th line end of described 2nd RJ45 interface.
As a kind of improved plan, the first input end of described 4th Ba Lun transformer is connected with the connecting line between the 7th line end of a described RJ45 interface and the 7th line end of described 2nd RJ45 interface, and the second input of described 4th Ba Lun transformer is connected with the connecting line between the 8th line end of a described RJ45 interface and the 8th line end of described 2nd RJ45 interface.
As a kind of improved plan, the output of described first Ba Lun transformer is connected with described first coaxial cable connecting interface, the output of described second Ba Lun transformer is connected with described second coaxial cable connecting interface, the output of described 3rd Ba Lun transformer is connected with described triaxial cable connecting interface, and the output of described 4th Ba Lun transformer is connected with described 4th coaxial cable connecting interface.
As a kind of improved plan, between the first input end of described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer and the second input, be parallel with resistance respectively.
As a kind of improved plan, described testing equipment is analog oscilloscope, digital oscilloscope, mixing oscilloscope or eye pattern testing equipment.
Concrete, above-mentioned ethernet signal test interface change-over circuit comprises a RJ45 interface and the 2nd RJ45 interface, and a described RJ45 interface is connected with the network terminal, and the 2nd RJ45 interface is connected with equipment under test; Also comprise the first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer, be connected with a described RJ45 interface and the 2nd RJ45 interface respectively; First Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer are connected respectively setting the first coaxial cable connecting interface on circuit boards, the second coaxial cable connecting interface, triaxial cable connecting interface and the 4th coaxial cable connecting interface; Described first coaxial cable connecting interface, the second coaxial cable connecting interface, triaxial cable connecting interface and the 4th coaxial cable connecting interface be connecting test equipment respectively.Foregoing circuit simplifies the complexity of traditional differential amplifier peripheral circuit, without the need to providing power supply for ethernet signal test interface change-over circuit, reduces circuit power consumption; Meanwhile, use Ba Lun transformer to reduce the size of circuit board, reduce costs.
Owing to being parallel with resistance respectively between the first input end and the second input of the first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer, this resistance realizes the abatement affected ethernet signal test interface change-over circuit and equipment under test line signal.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the ethernet signal test interface change-over circuit that the utility model provides;
Wherein, 1-circuit board, 2-the one RJ45 interface, 3-the 2nd RJ45 interface, the 4-network terminal, 5-equipment under test, 6-first Ba Lun transformer, 7-second Ba Lun transformer, 8-the 3rd Ba Lun transformer, 9-the 4th Ba Lun transformer, 10-first coaxial cable connecting interface, 11-second coaxial cable connecting interface, 12-triaxial cable connecting interface, 13-the 4th coaxial cable connecting interface, 14-testing equipment, 15-first input end, 16-second input, 17-output, 18-resistance.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the electrical block diagram of the ethernet signal test interface change-over circuit that the utility model provides, and for convenience of explanation, only gives the part relevant to the utility model in figure.
Ethernet signal test interface change-over circuit comprises circuit board 1, this circuit board 1 be provided with a RJ45 interface 2 and the 2nd RJ45 interface the 3, one RJ45 interface 2 is connected with the network terminal 4, the 2nd RJ45 interface is connected with equipment under test 5;
Circuit board 1 is also provided with and is connected the first Ba Lun transformer 6, second Ba Lun transformer 7, the 3rd Ba Lun transformer 8 and the 4th Ba Lun transformer 9 respectively with a described RJ45 interface and the 2nd RJ45 interface respectively;
First Ba Lun transformer 6, second Ba Lun transformer 7, the 3rd Ba Lun transformer 8 and the 4th Ba Lun transformer 9 are connected respectively setting the first coaxial cable connecting interface 10, second coaxial cable connecting interface 11, triaxial cable connecting interface 12 and the 4th coaxial cable connecting interface 13 on the circuit card 1;
First coaxial cable connecting interface 10, second coaxial cable connecting interface 11, triaxial cable connecting interface 12 and the 4th coaxial cable connecting interface 13 be connecting test equipment 14 respectively.
In this embodiment, a RJ45 interface 2 and the 2nd RJ45 interface 3 interconnection network terminal 4 and equipment under test 5 respectively, realizes the collection of the ethernet signal to main path signal, does not affect the transmission of main road ethernet signal simultaneously;
After ethernet signal is carried out interface conversion by the first coaxial cable connecting interface 10, second coaxial cable connecting interface 11, triaxial cable connecting interface 12 and the 4th coaxial cable connecting interface 13 respectively, pass to equipment under test 5, wherein, equipment under test 5 is analog oscilloscope, digital oscilloscope, mixing oscilloscope or eye pattern testing equipment 14, can certainly be other equipment, not repeat them here.
Wherein, a RJ45 interface 2 and the 2nd RJ45 interface 3 are respectively equipped with the first line end, the second line end, the 3rd line end, the 4th line end, the 5th line end, the 6th line end, the 7th line end and the 8th line end;
First Ba Lun transformer 6, second Ba Lun transformer 7, the 3rd Ba Lun transformer 8 and the 4th Ba Lun transformer 9 are respectively equipped with first input end 15, second input 16 and output 17;
The first input end 15 of the first Ba Lun transformer 6 is connected with the connecting line between the first line end of a described RJ45 interface 2 and the first line end of the 2nd RJ45 interface 3, and the second input 16 of the first Ba Lun transformer 6 is connected with the connecting line between the second line end of a RJ45 interface 2 and the second line end of the 2nd RJ45 interface 3;
The first input end 15 of the second Ba Lun transformer 7 is connected with the connecting line between the 3rd line end of a RJ45 interface 2 and the 3rd line end of the 2nd RJ45 interface 3, and the second input 16 of the second Ba Lun transformer 7 is connected with the connecting line between the 6th line end of a described RJ45 interface 2 and the 6th line end of the 2nd RJ45 interface 3;
The first input end 15 of the 3rd Ba Lun transformer 8 is connected with the connecting line between the 4th line end of a RJ45 interface 2 and the 4th line end of the 2nd RJ45 interface 3, and the second input 16 of the 3rd Ba Lun transformer 8 is connected with the connecting line between the 5th line end of a RJ45 interface 2 and the 5th line end of the 2nd RJ45 interface 3;
The first input end 15 of the 4th Ba Lun transformer 9 is connected with the connecting line between the 7th line end of a RJ45 interface 2 and the 7th line end of the 2nd RJ45 interface 3, and the second input 16 of the 4th Ba Lun transformer 9 is connected with the connecting line between the 8th line end of a RJ45 interface 2 and the 8th line end of the 2nd RJ45 interface 3.
In this embodiment, above-mentioned first line end is the TX+ line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, second line end is the TX-line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 3rd line end is the RX+ line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 4th line end is the TR3+ line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 5th line end is the TR3-line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 6th line end is the RX-line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 7th line end is the TR4+ line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, 8th line end is the TR4-line end on a RJ45 interface 2 and the 2nd RJ45 interface 3, wherein, TX+ line end and TX-line end are signal sending end, RX+ line end and RX-line end are signal receiving end.
Wherein, this circuit board 1 also may arrange other circuit elements, do not repeat them here, but not in order to limit the utility model.
In the utility model, the output 17 of the first Ba Lun transformer 6 is connected with described first coaxial cable connecting interface 10, the output 17 of described second Ba Lun transformer 7 is connected with described second coaxial cable connecting interface 11, the output 17 of described 3rd Ba Lun transformer 8 is connected with described triaxial cable connecting interface 12, and the output 17 of described 4th Ba Lun transformer 9 is connected with the 4th coaxial cable connecting interface 13.
In the utility model, in order to reduce the problems of Signal Integrity that signal reflex causes, simultaneously also in order to reduce the impact on circuit and equipment under test 5 line signal, between the first input end 15 and the second input 16 of the first Ba Lun transformer 6, second Ba Lun transformer 7, the 3rd Ba Lun transformer 8 and the 4th Ba Lun transformer 9, be parallel with resistance 18 respectively.
In the utility model, TC1-1-13 transformer selected respectively by first Ba Lun transformer 6, second Ba Lun transformer 7, the 3rd Ba Lun transformer 8 and the 4th Ba Lun transformer 9, wherein, TC1-1-13 transformer is a radio freqnency transformer, bandwidth range can from 4.5MHz to 3000MHz, and insertion loss is 1dB when below 1000MHz.
In the utility model, ethernet signal test interface change-over circuit exists as an internal core component of ethernet signal test interface conversion equipment, this ethernet signal test interface conversion equipment is as the existence form directly perceived of this ethernet signal test interface change-over circuit, this ethernet signal test interface conversion equipment is also provided with other in order to the auxiliary functor realizing interface conversion, such as control button, display unit and control circuit etc., do not repeat them here, but not in order to limit the utility model.
The ethernet signal test interface change-over circuit that the utility model provides simplifies the complexity of traditional employing differential amplifier interface circuit, without the need to providing power supply for interface circuit, reducing the power consumption of circuit, being specially adapted to the occasion that power consumption requirements is strict; Ba Lun volume of transformer is little, and without the need to peripheral circuits such as extra resistance, electric capacity, significantly can reduce circuit board 1 size; Ba Lun transformer is compared differential amplifier low price, greatly can reduce product cost during batch production.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. an ethernet signal test interface change-over circuit, it is characterized in that, described ethernet signal test interface change-over circuit comprises a RJ45 interface and the 2nd RJ45 interface, and a described RJ45 interface is connected with the network terminal, and described 2nd RJ45 interface is connected with equipment under test;
Also comprise the first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer, be connected with a described RJ45 interface and the 2nd RJ45 interface respectively;
Described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer also distinguish connecting test equipment.
2. ethernet signal test interface change-over circuit according to claim 1, it is characterized in that, described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer are connected with described testing equipment respectively by the first coaxial cable connecting interface of correspondence, the second coaxial cable connecting interface, triaxial cable connecting interface and the 4th coaxial cable connecting interface.
3. ethernet signal test interface change-over circuit according to claim 2, it is characterized in that, a described RJ45 interface and the 2nd RJ45 interface are respectively equipped with the first line end, the second line end, the 3rd line end, the 4th line end, the 5th line end, the 6th line end, the 7th line end and the 8th line end;
Described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer are respectively equipped with first input end, the second input and output.
4. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, the first input end of described first Ba Lun transformer is connected with the connecting line between the first line end of a described RJ45 interface and the first line end of described 2nd RJ45 interface, and the second input of described first Ba Lun transformer is connected with the connecting line between the second line end of a described RJ45 interface and the second line end of described 2nd RJ45 interface.
5. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, the first input end of described second Ba Lun transformer is connected with the connecting line between the 3rd line end of a described RJ45 interface and the 3rd line end of described 2nd RJ45 interface, and the second input of described second Ba Lun transformer is connected with the connecting line between the 6th line end of a described RJ45 interface and the 6th line end of described 2nd RJ45 interface.
6. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, the first input end of described 3rd Ba Lun transformer is connected with the connecting line between the 4th line end of a described RJ45 interface and the 4th line end of described 2nd RJ45 interface, and the second input of described 3rd Ba Lun transformer is connected with the connecting line between the 5th line end of a described RJ45 interface and the 5th line end of described 2nd RJ45 interface.
7. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, the first input end of described 4th Ba Lun transformer is connected with the connecting line between the 7th line end of a described RJ45 interface and the 7th line end of described 2nd RJ45 interface, and the second input of described 4th Ba Lun transformer is connected with the connecting line between the 8th line end of a described RJ45 interface and the 8th line end of described 2nd RJ45 interface.
8. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, the output of described first Ba Lun transformer is connected with described first coaxial cable connecting interface, the output of described second Ba Lun transformer is connected with described second coaxial cable connecting interface, the output of described 3rd Ba Lun transformer is connected with described triaxial cable connecting interface, and the output of described 4th Ba Lun transformer is connected with described 4th coaxial cable connecting interface.
9. ethernet signal test interface change-over circuit according to claim 3, it is characterized in that, between the first input end of described first Ba Lun transformer, the second Ba Lun transformer, the 3rd Ba Lun transformer and the 4th Ba Lun transformer and the second input, be parallel with resistance respectively.
10. the ethernet signal test interface change-over circuit according to any one of claim 1 to 9, is characterized in that, described testing equipment is analog oscilloscope, digital oscilloscope, mixing oscilloscope or eye pattern testing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721382.2U CN204190784U (en) | 2014-11-25 | 2014-11-25 | A kind of ethernet signal test interface change-over circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721382.2U CN204190784U (en) | 2014-11-25 | 2014-11-25 | A kind of ethernet signal test interface change-over circuit |
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| CN204190784U true CN204190784U (en) | 2015-03-04 |
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| CN201420721382.2U Active CN204190784U (en) | 2014-11-25 | 2014-11-25 | A kind of ethernet signal test interface change-over circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835581A (en) * | 2020-06-17 | 2020-10-27 | 中车青岛四方机车车辆股份有限公司 | Ethernet physical layer signal testing method and system |
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2014
- 2014-11-25 CN CN201420721382.2U patent/CN204190784U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835581A (en) * | 2020-06-17 | 2020-10-27 | 中车青岛四方机车车辆股份有限公司 | Ethernet physical layer signal testing method and system |
| CN111835581B (en) * | 2020-06-17 | 2021-09-17 | 中车青岛四方机车车辆股份有限公司 | Ethernet physical layer signal testing method and system |
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