阅读说明：本技术 误码测试装置 (Error code testing device ) 是由 章飞 于 2021-08-24 设计创作，主要内容包括：本发明一种误码测试装置,包括PCB电路板、第一光模块插座、第二光模块插座、误码测试模块；所述第一光模块插座与第二光模块插座通过PCB电路板实现电气连接,误码测试模块与第一光模块插座通过金手指连接,第一光模块插座与外部上位机连接,待测光模块通过金手指与第二光模块插座连接；所述误码测试模块包括相互连接的收发芯片和控制单元；控制单元控制收发芯片对产生的伪随机码序列和接收的待比较信号进行比较；误码测试模块通过金手指连接,简化且缩短线缆的连接,降低信号的传输损耗,提高误码测试的准确率；且该方案还能够有效将误码测试设备小型化、便携化,有效降低误码测试仪器的制造成本,方便携带误码测试仪器到现场进行检测。(The invention relates to an error code testing device, which comprises a PCB (printed circuit board), a first optical module socket, a second optical module socket and an error code testing module, wherein the PCB is provided with a first optical module socket and a second optical module socket; the first optical module socket and the second optical module socket are electrically connected through a PCB (printed circuit board), the error code testing module is connected with the first optical module socket through a golden finger, the first optical module socket is connected with an external upper computer, and the optical module to be tested is connected with the second optical module socket through the golden finger; the error code testing module comprises a transceiver chip and a control unit which are connected with each other; the control unit controls the transceiver chip to compare the generated pseudo-random code sequence with the received signal to be compared; the error code testing module is connected through a golden finger, so that the connection of the cable is simplified and shortened, the transmission loss of signals is reduced, and the accuracy of error code testing is improved; the scheme can also effectively miniaturize and carry the error code testing equipment, effectively reduce the manufacturing cost of the error code testing instrument and facilitate the carrying of the error code testing instrument to the site for detection.)

1. The error code testing device is characterized by comprising a PCB (printed circuit board) 1, a first optical module socket 2, a second optical module socket 3 and an error code testing module 4;

the first optical module socket (2) and the second optical module socket (3) are electrically connected through a PCB (printed circuit board) (1), the error code testing module (4) is connected with the first optical module socket (2) through a golden finger, the first optical module socket (2) is connected with an external upper computer, and the optical module to be tested (5) is connected with the second optical module socket (3) through the golden finger;

the error code testing module (4) comprises a transceiver chip (41) capable of generating a pseudo-random code sequence and a control unit (42); the transceiver chip (41) is electrically connected with the control unit (42); the receiving and transmitting chip (41) receives a signal to be compared returned after the sent pseudo-random code sequence passes through the optical module to be tested (5), and the control unit (42) controls the receiving and transmitting chip (41) to compare the pseudo-random code sequence with the signal to be compared; the pseudo-random code sequence and the comparison signal comparison result are output to the upper computer through the control unit (42).

2. The error code testing device of claim 1, wherein the first optical module socket (2) and the second optical module socket (3) are disposed on the same surface of the PCB (1).

3. The error code testing device of claim 1, wherein the first optical module socket (2) and the second optical module socket (3) are disposed at two corresponding side positions of the PCB (1).

4. The error code testing device of claim 3, characterized in that the first optical module socket (2) and the second optical module socket (3) are connected by a wire running through the PCB circuit board (1).

5. The error code testing device according to any one of claims 1 to 3, further comprising a reference clock (6), wherein the reference clock (6) is connected to the transceiver chip (41), and the transceiver chip (41) is connected to an upper computer for displaying the eye pattern test result.

6. Error code testing device according to claim 5, characterized in that the reference clock (6) is integrated in the transceiver chip (41).

7. The error code testing device according to any of claims 1 to 4, characterized in that the error code testing module (4) is a pass-test optical module.

Technical Field

The invention relates to the technical field of digital communication systems, in particular to an error code testing device.

Background

With the rapid development of information technology, information transfer has become an important part of daily life, and the reliability of information transfer seems to be more important. Digital communication is the first choice for transmitting information due to the characteristics of small influence of distance on communication quality, good communication confidentiality, strong anti-interference capability and the like, and is widely applied and rapidly developed. Since the error code directly destroys the correctness of information transmission, the error code is the most important factor affecting digital communication systems, and the error code tester is widely used as an important tool for evaluating the quality of data transmission channels, and particularly, in recent years, with the continuous improvement of information transmission rate, the rate of the error code tester has been from hundreds of megabytes to hundreds of gigabytes at present. However, the current domestic error code instrument products are few in variety, and the domestic high-end error code instrument market is mostly monopolized by foreign products. The present special error code instrument is connected with a test fixture through a high-frequency cable to test the error code of an optical module. Under the existing technical scheme, a special error code testing system is special equipment, is inconvenient to carry, has very high cost, and is particularly high in price for high-speed optical module testing equipment with the speed of 200Gbps, 400Gbps, 800Gbps or more. The core of the test equipment is an error code test module which is arranged integrally with the equipment, so that the height is high, and the equipment is inconvenient to overhaul. The coaxial cable is adopted to connect the error code testing system with the optical module to be tested and test the same, and the coaxial cable is long in length, the transmission path of the signal is very long, the loss of the signal in the coaxial cable is large, and the accuracy of the error code testing system is to be further improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an error code testing device with simple structure and small signal loss.

The invention adopts the following technical scheme: the error code testing device comprises a PCB (printed circuit board), a first optical module socket, a second optical module socket and an error code testing module;

the first optical module socket and the second optical module socket are electrically connected through a PCB (printed circuit board), the error code testing module is connected with the first optical module socket through a golden finger, the first optical module socket is connected with an external upper computer, and the optical module to be tested is connected with the second optical module socket through the golden finger;

the error code testing module comprises a transceiver chip capable of generating a pseudo-random code sequence and a control unit; the transceiver chip is electrically connected with the control unit; the control unit controls the transceiving chip to compare the pseudo-random code sequence with the signal to be compared; and the pseudo-random code sequence and the comparison signal comparison result are output to the upper computer through the control unit.

Further, the first optical module socket and the second optical module socket are arranged on the same surface of the PCB.

The first optical module socket and the second optical module socket can be arranged in parallel in the same direction side by side, and openings can also be arranged in a row in a deviating manner.

Further, the first optical module socket and the second optical module socket are arranged at two corresponding side positions of the PCB.

The first optical module socket and the second optical module socket can be arranged on two sides of the same position of the PCB, and the length of a lead for connecting the first optical module socket and the second optical module socket is shortened to the maximum extent.

Further, the first optical module socket and the second optical module socket are connected through a wire penetrating through the PCB.

Further, the eye pattern testing device further comprises a reference clock 6, wherein the reference clock 6 is connected with the transceiver chip 41, and the transceiver chip 41 is connected with an upper computer for displaying the eye pattern testing result.

Further, the reference clock 6 is integrated in the transceiver chip 41.

Further, the error code testing module is an optical module which is qualified through testing.

The invention has the beneficial effects that: the error code testing device simplifies and shortens the connection of cables, reduces the transmission loss of signals and improves the accuracy of error code testing in a connecting mode of a golden finger; the scheme can also effectively miniaturize and carry the error code testing equipment, effectively reduce the manufacturing cost of the error code testing device and facilitate the carrying of the error code testing device to the site for detection.

Furthermore, the first optical module socket and the second optical module socket are electrically connected through the PCB, and the first optical module socket and the second optical module socket can be arranged on the same side of the PCB, so that the operation is convenient, and the error code testing module can be conveniently replaced at the same time.

Furthermore, the first optical module socket and the second optical module socket are arranged at corresponding positions on two sides of the PCB, so that the length of a lead between the first optical module socket and the second optical module socket can be shortened to the maximum extent, the loss of a signal on the lead is reduced, the signal error code of the signal caused by the loss of the lead is reduced, and the precision of the error code testing device is improved.

Furthermore, the first optical module socket and the second optical module socket are arranged at corresponding positions on two sides of the PCB, and the lead between the first optical module socket and the second optical module socket penetrates through the PCB, so that the lead between the first optical module socket and the second optical module socket can be shortest, the transmission loss of signals is reduced, and the precision of the error code testing device is improved.

Furthermore, the reference clock can enable the error code testing device to provide a synchronous reference clock required by the eye pattern test, the eye pattern test can be provided, and the functions of the error code testing device are enriched.

Furthermore, the reference clock is integrated in the transceiver chip, so that the circuit structure is simplified, and the function of the error code testing equipment is enriched.

Furthermore, the tested optical module with good function is directly used as an error code testing module, so that the manufacturing cost of the error code testing device and the cost of the error code testing module can be effectively reduced, local materials can be used, and the use convenience of the error code testing device is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an error code testing apparatus according to the present invention;

fig. 2 is a schematic structural diagram of the error code testing device shown in fig. 1 in the direction a;

fig. 3 is a schematic structural diagram of the error code testing device shown in fig. 1 in the direction B;

FIG. 4 is a block diagram of one embodiment of the error code testing module shown in FIG. 1;

fig. 5 is a schematic structural diagram of another embodiment of the error code testing apparatus of the present invention.

Detailed Description

Example 1

Fig. 1 is a schematic structural diagram of an embodiment of an error code testing apparatus according to the present invention. As shown in fig. 1, the embodiment includes a PCB 1, a first optical module socket 2, a second optical module socket 3, and an error code testing module 4; the first optical module socket 2 and the second optical module socket 3 are electrically connected through a PCB (printed circuit board) 1, the error code testing module 4 is connected with the first optical module socket 2 through a golden finger, the first optical module socket 2 is connected with an external upper computer, and the optical module 5 to be tested is connected with the second optical module socket 3 through the golden finger; the error code testing module 4 comprises a transceiver chip 41 capable of generating pseudo random code sequences and a control unit 42; the transceiver chip 41 is electrically connected with the control unit 42; the transceiving chip 41 receives a signal to be compared returned after the sent pseudo random code sequence passes through the optical module 5 to be tested, and the control unit 42 controls the transceiving chip 41 to compare the pseudo random code sequence with the signal to be compared; the pseudo random code sequence and the comparison signal comparison result are output to the upper computer through the control unit 42. The optical module to be tested, the first optical module socket 2, the PCB 1, the second optical module socket 3 and the error code testing module 4 are not connected through coaxial cables.

The invention can be applied to the test of the optical module; when in use, the error code testing device is connected with the upper computer; the upper computer can be a personal computer, and further, the upper computer adopts a portable notebook computer, so that the error code testing device and the upper computer are both convenient and can be used in various environments such as laboratories, factories, user sites and the like.

In this example, when in use, the error code testing module 4 is inserted into the first optical module 2 through a golden finger, the optical module 5 to be tested is inserted into the second optical module socket 3, and the optical module 5 to be tested is connected with an optical fiber; the upper computer is connected with the error code testing device and is used for setting and displaying a testing result. After the power is supplied to the error code testing device, the control unit 42 controls the transceiver chip 41, and the transceiver chip 41 generates a pseudo random code sequence, the pseudo random code reaches the optical module 5 to be tested through the first optical module socket 2, the PCB 1 and the second optical module socket 3, the pseudo random code is photoelectrically converted into an optical signal by the optical module to be tested and output to the optical fiber interface, the optical signal returns to the optical module 5 to be tested through the optical fiber loop and is photoelectrically converted into an electrical signal, namely a signal to be compared, the signal to be compared reaches the transceiver chip 41 through the second optical module socket 3, the PCB 1 and the first optical module socket 2, and the control unit 42 under the transceiver chip 41 compares the pseudo random code sequence with the signal to be compared to obtain a result of the error rate.

The optical module to be tested 5, the first optical module socket 2, the PCB 1, the second optical module socket 3 and the error code testing module 4 are not connected through coaxial cables. Effectively shortening the lead between the components. Taking the test of the 40GHz frequency point signal 400G (8 × 50Gbps) optical module as an example, the insertion loss value of the signal in the test, that is, the total loss of the signal in the circuit, is calculated. Using traditional error code testing equipment, the signal loss of a radio frequency cable (coaxial cable) is 2.5-3.0dB per 0.8-1.0 m, and the insertion loss value of a radio frequency connector is 0.3-0.4 dB; the optical module test board has a trace loss value of 3.5-4.5dB, and the total insertion loss of the test equipment is 6.3-7.9 dB. When the optical module socket is used, the length of the wire is greatly shortened due to the connection mode of the golden finger, wherein the wiring loss value of the optical module PCB is 2.0-2.5dB, the loss values of the two optical module sockets are 1.0dB, and the total insertion loss is as follows: 3.0-3.5 dB. That is, the utility model discloses an insertion loss value only is 45% of traditional error code test equipment, and the reliability of signal transmission quality improves greatly, and because this embodiment simple structure, the cost only is 30% of traditional error code test equipment. And the higher the speed of the optical module to be tested is, the higher the required bandwidth is, the higher the requirement on the insertion loss value is, and the scheme of adopting the error code testing device of the invention has more obvious advantages when the optical module with higher speed is tested.

As a specific embodiment, as shown in fig. 1, the first optical module socket 2 and the second optical module socket 3 are disposed on two sides of the PCB 1 at corresponding positions.

As shown in fig. 1, 2, and 3, the first optical module socket 2 and the second optical module socket 3 are disposed at corresponding positions on both sides of the PCB 1, the direction of the socket opening of the first optical module socket 2 is the same as the direction of the socket opening of the second optical module socket 3, the first optical module socket 2 and the second optical module socket 3 are connected by the PCB 1, and a wire connecting the first optical module socket 2 and the second optical module socket 3 passes through the PCB 1. As a specific implementation manner, the first optical module socket 2 and the second optical module socket 3 are arranged on two sides of the same position of the PCB 1, the length of a wire vertically penetrating through the PCB 1 is shortest, and the signal loss is smallest; the length of the wires connecting the first optical module socket 2 and the second optical module socket 3 depends on the thick board of the PCB board.

As a specific implementation manner, the embodiment further includes a reference clock 6, the reference clock 6 is connected to the transceiver chip 41, and the transceiver chip 41 is connected to an upper computer that displays the eye pattern test result.

As shown in fig. 3 and 4, the reference clock 6 is connected to the transceiver chip 41, and a clock interface is disposed on the PCB 1 and connected to the first optical module socket 2. The reference clock 6 may be inherited in the error code testing module 4, and the reference clock 6 may also be arranged outside the error code testing module 4.

When the optical module to be tested is used, the clock interface is used for connecting an upper computer for displaying an eye pattern test result, namely, the transceiver chip 4 provided with the reference clock 6 is connected with the upper computer, the upper computer is simultaneously connected with the optical fiber output interface of the optical module to be tested 5 through an optical fiber, and specifically, the upper computer can be an oscillograph. The upper computer receives pseudo-random code sequence signals of a clock provided by the reference clock 6 and signals output by the optical fiber output interface, and observes eye pattern test results through the upper computer, so that the use function of the error code testing device is enriched, and more comprehensive error code testing is provided.

As a specific embodiment, the reference clock 6 is integrated in the transceiver chip 41; so that the transceiver chip 41 has the eye pattern test function.

When the device is used, the transceiver chip is connected with the upper computer through the golden finger and the clock interface, and meanwhile, the upper computer is connected with the optical fiber output interface of the optical module to be tested 5 through the optical fiber to implement the eye pattern test.

As a specific embodiment, a light module that passes the test may be used as the error code testing module 4.

In the specific implementation of the embodiment, the tested optical module is used as the error code testing module 4 to be inserted into the first optical module socket 2, and the optical fiber interface of the error code testing module 4 is suspended; the optical module 5 to be tested is inserted into the second optical module socket 3, and the optical fiber interface of the optical module 5 to be tested is connected with the optical fiber.

In the implementation of the embodiment, the error code testing device only needs to implement a special circuit except the error code testing module 4; the special circuit except the error code testing module 4 and the upper computer are carried to a use place for use. When the optical module testing device is used specifically, an optical module which is qualified after being checked can be used as an error code testing module 4 to be inserted into the first optical module socket 2, and then an optical module 5 to be tested is inserted into the second optical module socket 3 to test the optical module 5 to be tested.

The optical module product is a high value-added product, and the manufacturing cost and the selling price are high; by adopting the embodiment, the error code testing module 4 can be finally applied to products or used as the products, so that the utilization rate of the products is effectively improved; meanwhile, when the error code testing module 4 is suddenly damaged, other detected optical modules can be conveniently used for replacing the error code testing module 4; the maintenance cost of the error code testing device is improved, and meanwhile, the portability, maintainability and economy of the error code testing device are greatly improved, so that the error code testing device has excellent commercial application value.

Example 2

Fig. 5 is a schematic structural diagram of another embodiment of the error code testing apparatus of the present invention. As shown in fig. 5, the other structure of the error code testing device in this embodiment is the same as that in the embodiment in fig. 1, and the main difference is that the first optical module socket 2 and the second optical module socket 3 are disposed on the same side of the PCB 1, and the wire connecting the first optical module socket 2 and the second optical module socket 3 does not penetrate through the PCB 1.

In this embodiment, the first optical module socket 2 and the second optical module socket 3 may be set as required. As shown in fig. 5, the first optical module socket 2 and the second optical module socket 3 have the same and parallel socket direction; the error code testing module 4 and the optical module 5 to be tested are conveniently inserted into the first optical module socket 2 and the second optical module socket 3 respectively, and operation is convenient.

When the error code testing device is implemented, related components of the error code testing device can be arranged on the same side of the PCB, so that the error code testing module 4 and the optical module 5 to be tested can be operated conveniently, the manufacturing difficulty can be effectively reduced, the manufacturing process is reduced, and the manufacturing cost is reduced.

Arranging the first optical module socket 2 and the second optical module socket 3 on the PCB 1 in a straight line belongs to the same technical solution of this embodiment, specifically, the socket direction of the first optical module socket 2 is opposite to the socket direction of the second optical module socket 3, and the sockets are arranged in a collinear manner.

The error code testing device can be used for testing the optical module in the communication field. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a scope of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.