Signal measuring jig

Abstract

The embodiment of the utility model relates to the field of signal measurement, and discloses a signal measurement jig, which comprises a connection interface, a signal transmission line and a measurement interface, the connection interface is used for connecting electronic equipment and receiving a to-be-tested signal sent by the electronic equipment; the signal transmission line is in communication connection with the connection interface and external analysis equipment and is used for sending a to-be-tested signal sent by the electronic equipment to the analysis equipment, and the analysis equipment performs data analysis on the received to-be-tested signal; one end of the measurement interface is in communication connection with the signal transmission line, and the other end of the measurement interface is used for being in butt joint with an external measurement tool (such as an oscilloscope), so that the measurement tool collects a to-be-measured signal to perform signal measurement on the to-be-measured signal. According to the scheme, the to-be-tested signal sent by the electronic equipment is received through the corresponding connection interface, and the to-be-tested signal can be received under the condition that a machine is not disassembled; in addition, the measurement interface is in butt joint with a measurement tool (such as an oscilloscope), so that the precision and accuracy of signal measurement are improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of signal measurement, and particularly relate to a signal measurement jig. BACKGROUND

[0002] The VGA signal refers to a Video Graphics Array signal, which is an analog video interface used to transmit computer-generated image data to a display. VGA signal measurement mainly involves testing and analyzing the signals transmitted by the VGA interface. With the continuous development of technology, the current VGA signal is mainly used in the industrial field, and therefore the requirements for the VGA signal are more stringent, and a VGA signal measurement jig with higher measurement precision is needed.

[0003] The existing VGA signal measurement tool needs to disassemble the electronic device, which makes the signal measurement process inconvenient. Moreover, when the electronic device is measured by the VGA signal measurement tool, it is easily affected by external factors, resulting in inaccurate measurement results. SUMMARY

[0004] The embodiments of the present application mainly provide a signal measurement jig, which can measure the signal of an electronic device without disassembling the electronic device and improve the accuracy of signal measurement.

[0005] To solve the above technical problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a signal measurement jig, comprising a connection interface, a signal transmission line and a measurement interface.

[0007] The connection interface is used to connect an electronic device, receive a to-be-measured signal sent by the electronic device, and send the to-be-measured signal to the signal transmission line.

[0008] The signal transmission line is communicatively connected to the connection interface and an external analysis device, and is used to send the received to-be-measured signal to the analysis device. The analysis device receives the to-be-measured signal to analyze the to-be-measured signal and determine whether the to-be-measured signal meets the protocol standard.

[0009] One end of the measurement interface is communicatively connected to the signal transmission line, and the other end of the measurement interface is used to connect an external measurement tool, so that the measurement tool collects the to-be-measured signal to measure the to-be-measured signal.

[0010] In some embodiments, the signal transmission line includes a video signal transmission line, a synchronization signal transmission line, a clock signal transmission line and a data signal transmission line.

[0011] In some embodiments, the video signal transmission line further comprises a first impedance matching element, one end of the first impedance matching element is connected to the video signal transmission line, and the other end of the first impedance matching element is grounded.

[0012] In some embodiments, the synchronization signal transmission line comprises a second impedance matching element, one end of the second impedance matching element is connected to the connection interface, and the other end of the second impedance matching element is connected to the analysis device.

[0013] In some embodiments, the synchronization signal transmission line further comprises a first filter capacitor, one end of the first filter capacitor is connected to the second impedance matching element, and the other end of the first filter capacitor is grounded.

[0014] In some embodiments, the clock signal line comprises a first switch tube, a first switch control module, and a first pull-up resistor.

[0015] The drain of the first switch tube is respectively connected to the first pull-up resistor and the connection interface, the gate of the first switch tube is connected to the first switch control module, and the source of the first switch tube is connected to the analysis device.

[0016] In some embodiments, the clock signal transmission line further comprises a second filter capacitor, one end of the second filter capacitor is connected to the drain of the first switch tube, and the other end of the second filter capacitor is grounded.

[0017] In some embodiments, the data signal line comprises a second switch tube, a second switch control module, and a second pull-up resistor.

[0018] The drain of the second switch tube is respectively connected to the second pull-up resistor and the connection interface, the gate of the second switch tube is connected to the second switch control module, and the source of the second switch tube is connected to the analysis device.

[0019] In some embodiments, the connection module comprises a VGA interface.

[0020] In some embodiments, the measurement interface comprises a pin connector.

[0021] The beneficial effects of the embodiment of the present application are as follows: different from the prior art, the signal measurement jig provided by the embodiment of the present application comprises a connection interface, a signal transmission line and a measurement interface; the connection interface is used for connecting an electronic device, receiving a to-be-measured signal sent by the electronic device, and sending the to-be-measured signal to the signal transmission line; the signal transmission line is respectively communicatively connected with the connection interface and an external analysis device, and is used for sending the received to-be-measured signal to the analysis device; the analysis device receives the to-be-measured signal to perform data analysis on the to-be-measured signal, and determine whether the to-be-measured signal meets a protocol standard; one end of the measurement interface is communicatively connected with the signal transmission line, and the other end of the measurement interface is used for connecting an external measurement tool (such as an oscilloscope), so that the measurement tool collects the to-be-measured signal to perform signal measurement on the to-be-measured signal. Through the corresponding connection interface, the to-be-measured signal sent by the electronic device can be received without disassembling the electronic device. In addition, compared with directly using the external measurement tool (such as the oscilloscope) to perform signal detection on the disassembled electronic device, the measurement tool (such as the oscilloscope) is connected through the measurement interface, so that the probe of the measurement tool can detect and collect signals, and the measurement precision and accuracy are higher. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not restrictive, of the present embodiments, wherein elements having the same reference number designates like elements throughout the various figures. The figures of the drawing are not necessarily to scale, except if so particularly indicated.

[0023] Figure 1 is a structural schematic diagram of a signal measurement jig provided by the utility model embodiment;

[0024] Figure 2 is a circuit diagram of a signal measurement jig provided by the utility model embodiment. DETAILED DESCRIPTION

[0025] The present application will be described in detail below with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made. These all belong to the protection scope of the present application.

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with the help of the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0027] It should be noted that the various features of the embodiments of the present application can be combined with each other, and all within the scope of the present application, if there is no conflict. In addition, although the functional modules are divided in the device schematic diagram, and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from the module division in the device or the order in the flowchart. In addition, the terms "first", "second", "third" and the like used herein do not limit the data and execution order, but only distinguish the same items or similar items with basically the same function and effect.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification are the same as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not used to limit the present application. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0029] In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict.

[0030] The VGA interface is a video interface standard for connecting computers and displays or televisions to transmit VGA signals; VGA signals are an analog video signal standard for transmitting computer-generated image data to displays. In people's life, VGA signals are applied to various types of electronic devices, such as computer displays, game consoles, and professional audio and video equipment, etc. With the development of technology, although VGA interface is gradually replaced by digital interface, due to the cost-effectiveness and backward compatibility of VGA interface, it is currently mainly applied in industrial fields, such as monitoring and control, machine vision and human-machine interface, etc. Among them, industrial monitoring systems, machine vision systems and human-machine interface (HMI) systems all rely on high-definition images for accurate monitoring, control and operation, and the integrity of VGA signals directly affects the accuracy and reliability of the images.

[0031] Therefore, the industrial field has relatively strict requirements for VGA signals, and VGA signal measurement can evaluate the integrity of VGA signals, including the strength, stability and waveform of video signals and synchronization signals, to determine whether there are problems such as signal attenuation, interference or distortion in VGA signals. The existing VGA signal measurement tools need to disassemble the electronic equipment, making the signal measurement process more inconvenient; and the existing VGA measurement tools need to be fixed manually, and if the VGA signal measurement tool shakes or other problems occur during the signal measurement process, it will affect the final signal measurement result, making the accuracy of VGA signal measurement lower.

[0032] Therefore, the signal measurement jig 100 is provided, and please refer to Figure 1 The signal measurement jig 100 includes a connection interface 110, a signal transmission line 120 and a measurement interface 130. The connection interface 110 is connected to the electronic device 200, receives the to-be-measured signal sent by the electronic device 200, and sends the to-be-measured signal to the signal transmission line 120; the signal transmission line 120 is respectively connected to an external analysis device 400 and the measurement interface 130, and sends the received to-be-measured signal to the external analysis device 400; the external analysis device 400 analyzes the received to-be-measured signal to confirm whether the to-be-measured signal meets the protocol standard; and the measurement interface 130 is used to be connected to the external measurement tool 300 (for example, an oscilloscope), for example, a probe of the oscilloscope is connected to the measurement interface 130, and the to-be-measured signal collected from the signal transmission line 120 can be measured to detect the strength, stability and waveform of the to-be-measured signal.

[0033] In some embodiments, the connection interface 110 includes a VGA interface 111, as shown in Figure 2 The VGA interface 111 is an analog video interface standard, which converts digital video signals into analog signals and then transmits them through the interface. The VGA interface 111 is a 15-pin D-type connector, which includes a plurality of signal line pins for transmitting VGA signals, and a plurality of ground line pins for providing signal reference points and reducing electromagnetic interference. The VGA interface 111 is connected to the external VGA connection interface of the electronic device 200, receives the to-be-measured signal (VGA signal) transmitted by the electronic device 200, and transmits the to-be-measured signal sent by the electronic device 200 to the signal transmission line 120 connected to the signal line pin through the signal line pin. It can be seen that the VGA interface 111 enables the signal measurement jig 100 to be connected to the electronic device 200 without disassembling the electronic device 200, receives the to-be-measured signal sent by the electronic device 200, realizes the measurement of the signal, and simplifies the operation of the signal measurement.

[0034] In some embodiments, the measurement interface 130 includes a pin connector 131 composed of a series of parallel metal pins (pin connector) for providing a connection point between the signal measurement jig 100 and the external measurement tool 300, the pin connector 131 includes four metal pins, i.e. the pin connector 131 has four pins, the input end of the pin connector 131 is in communication connection with the signal transmission line 120; the output end of the pin connector 131 is connected with the external measurement tool 300, for providing a connection point for the external measurement tool 300, facilitating the external measurement tool 300 to collect the to-be-measured signal and perform signal measurement. In some embodiments, the pin connector 131 can also include a red pixel brightness signal pin connector 1311, a green pixel brightness signal pin connector 1312, a blue pixel brightness signal pin connector 1314, a field synchronization signal pin connector 1315, a horizontal synchronization signal pin connector 1316, a clock signal pin connector 1317 and a data signal pin connector 1318.

[0035] Compared with directly connecting the external measurement device 300 and the electronic device 200 for measuring the VGA signal, the pin connector 131 provides a connection interface between the electronic device 200 and the measurement tool 300 (such as an oscilloscope) for the probe of the measurement tool 300 to be inserted and fixed to collect the to-be-measured signal, avoiding the influence of the VGA signal measurement result due to the improper fixing of the probe of the external measurement tool 300 by human, and improving the accuracy of the VGA signal measurement.

[0036] The signal transmission line 120 includes a video signal transmission line 121, a synchronization signal transmission line 122, a clock signal transmission line 123 and a data signal transmission line 124. The VGA signal includes a video signal, a synchronization signal, a clock signal and a data signal, and it can be seen that the video signal transmission line 121 is a line for transmitting a video signal; the synchronization signal transmission line 122 is a line for transmitting a synchronization signal; the clock signal transmission line 123 is a line for transmitting a clock signal; and the data signal transmission line 124 is a line for transmitting a data signal.

[0037] In the VGA signal, the video signal includes three kinds of video signals of the luminance signal of red pixels, the luminance signal of green pixels and the luminance signal of blue pixels, the video signal carries the pixel data of the image, and the data is transmitted to the display and converted into a visible image, so that the user can see the computer-generated graphics and text. In addition, the video signal contains luminance information, which determines the color of each pixel on the display. By adjusting the intensity of the video signal, rich colors can be represented. Therefore, the video signal transmission line 121 includes a red pixel luminance signal transmission line 1211, a green pixel luminance signal transmission line 1212 and a blue pixel luminance signal transmission line 1213. Among them, the red pixel luminance signal transmission line 1211 is the line used to transmit the red pixel luminance signal in the signal measurement process; the green pixel luminance signal transmission line 1212 is the line used to transmit the green pixel luminance signal in the signal measurement process; and the blue pixel luminance signal transmission line 1213 is the line used to transmit the blue pixel luminance signal in the signal measurement process.

[0038] The synchronization signal includes a field synchronization signal (VSYNC) and a line synchronization signal (HSYNC), which is used to coordinate the scanning process between the display and the graphics card, and ensure that the image can be correctly and stably displayed. The field synchronization signal is used to synchronize the scanning of the display in the vertical direction; the line synchronization signal is used to synchronize the scanning of the display in the horizontal direction. The two synchronization signals ensure that each row and each frame of the image can start and end correctly, thereby avoiding tearing or jumping of the image. Therefore, the synchronization signal transmission line 122 includes a field synchronization signal transmission line 1221 and a line synchronization signal transmission line 1222. Among them, the field synchronization signal transmission line 1221 is the line used to transmit the field synchronization signal in the signal measurement process; and the line synchronization signal transmission line 1222 is the line used to transmit the line synchronization signal in the signal measurement process.

[0039] The clock signal in the VGA signal provides a time reference to ensure consistency and stability of data transmission between the graphics card and the display. The clock signal transmission line 123 is the line used to transmit the clock signal in the signal measurement process. The data signal in the VGA signal is the data information parsed by the electronic device 200 on the display content, and the data signal in the aforementioned to-be-measured signal is used together with the video signal, the synchronization signal and the clock signal for data analysis by the external analysis device 400, so as to determine whether the to-be-measured signal meets the signal transmission standard, and realize the signal measurement of the to-be-measured signal.

[0040] Please refer to Figure 2The first impedance matching element 1214 is arranged on the video signal transmission line 121, one end of the first impedance matching element 1214 is connected with the red pixel luminance signal transmission line 1211, the green pixel luminance signal transmission line 1212 and the blue pixel luminance signal transmission line 1213 respectively, and the other end of the first impedance matching element 1214 is grounded. The input end of the red pixel luminance signal transmission line 1211 is connected with the first pin of the VGA interface 111, the output end of the red pixel luminance signal transmission line 1211 is connected with the external analysis equipment 400, for receiving the red pixel luminance signal sent by the electronic device 200 and sending the red pixel luminance signal to the external analysis equipment 400 for data analysis; the third pin and the fourth pin of the red pixel luminance signal pin connector 1311 are connected with the red pixel luminance signal transmission line 1211, and the first pin and the second pin of the red pixel luminance signal pin connector 1311 are grounded, for collecting the red pixel luminance signal passing through the red pixel luminance signal transmission line 1211 and transmitting the red pixel luminance signal to the external measurement tool 200 for signal measurement. Similarly, the input end of the green pixel luminance signal transmission line 1212 is connected with the second pin of the VGA interface 111, the output end of the green pixel luminance signal transmission line 1212 is connected with the external analysis equipment 400, for receiving the green pixel luminance signal sent by the electronic device 200 and sending the green pixel luminance signal to the external analysis equipment 400 for data analysis; the third pin and the fourth pin of the green pixel luminance signal pin connector 1312 are connected with the green pixel luminance signal transmission line 1212, and the first pin and the second pin of the green pixel luminance signal pin connector 1312 are grounded, for collecting the green pixel luminance signal passing through the green pixel luminance signal transmission line 1212 and transmitting the green pixel luminance signal to the external measurement tool 200 for signal measurement. Similarly, the input end of the blue pixel luminance signal transmission line 1213 is connected with the first pin of the VGA interface 111, the output end of the blue pixel luminance signal transmission line 1213 is connected with the external analysis equipment 400, for receiving the blue pixel luminance signal sent by the electronic device 200 and sending the blue pixel luminance signal to the external analysis equipment 400 for data analysis; the third pin and the fourth pin of the blue pixel luminance signal pin connector 1313 are connected with the blue pixel luminance signal transmission line 1213, and the first pin and the second pin of the blue pixel luminance signal pin connector 1313 are grounded, for collecting the blue pixel luminance signal passing through the blue pixel luminance signal transmission line 1213 and transmitting the blue pixel luminance signal to the external measurement tool 200 for signal measurement.

[0041] The second impedance matching element 1223 is arranged on the synchronization signal transmission line 122, and includes a field synchronization signal impedance matching element 1223a arranged on the field synchronization signal transmission line 1221 and a horizontal synchronization signal impedance matching element 1223b arranged on the horizontal synchronization signal transmission line 1222. The input end of the field synchronization signal impedance matching element 1223a is connected to the fourteenth pin of the VGA interface 111, and the output end of the field synchronization signal impedance matching element 1223a is connected to the external analysis device 400, for receiving the field synchronization signal sent by the electronic device 200 and sending the field synchronization signal to the external analysis device 400 for data analysis. In addition, the third pin and the fourth pin of the field synchronization signal pin connector 1315 are connected to the field synchronization signal transmission circuit 1221, and the first pin and the second pin of the field synchronization signal pin connector 1315 are grounded, for collecting the field synchronization signal sent by the electronic device 200 and transmitting the field synchronization signal to the connected external measurement tool 300 for measurement.

[0042] The input end of the horizontal synchronization signal impedance matching element 1223b is connected to the thirteenth pin of the VGA interface 111, and the output end of the horizontal synchronization signal impedance matching element 1223b is connected to the external analysis device 400, for receiving the horizontal synchronization signal sent by the electronic device 200 and sending the horizontal synchronization signal to the external analysis device 400 for data analysis. In addition, the third pin and the fourth pin of the horizontal synchronization signal pin connector 1316 are connected to the horizontal synchronization signal transmission circuit 1222, and the first pin and the second pin of the horizontal synchronization signal pin connector 1316 are grounded, for collecting the horizontal synchronization signal sent by the electronic device 200 and transmitting the horizontal synchronization signal to the connected external measurement tool 300 for measurement. The impedance matching element can help reduce reflection during signal transmission, thereby improving the integrity of the signal; and the impedance matching element can also reduce signal attenuation and improve the transmission distance and anti-interference ability of the system.

[0043] In some embodiments, the synchronization signal transmission line 122 further includes a first filter capacitor 1224, and the first filter capacitor 1224 further includes a field synchronization signal filter capacitor 1224a arranged on the field synchronization signal transmission line 1221 and a horizontal synchronization signal filter capacitor 1224b arranged on the horizontal synchronization signal transmission line 1222. One end of the field synchronization signal filter capacitor 1224a is connected to the field synchronization signal impedance matching element 1223a, and the other end of the field synchronization signal filter capacitor 1224a is grounded; one end of the horizontal synchronization signal filter capacitor 1224b is connected to the horizontal synchronization signal impedance matching element 1223b, and the other end of the horizontal synchronization signal filter capacitor 1224b is grounded. Arranging a filter capacitor in the signal transmission line can reduce signal attenuation and improve signal transmission efficiency.

[0044] The clock signal line 123 comprises a first switch tube 1231, a first switch control module 1232, a first pull-up resistor 1233 and a second filter capacitor 1234. The first switch control module 1232 further comprises a third pull-up resistor 1235. The drain of the first switch tube 1231 is connected to the fifteenth pin of the VGA interface 111, and the source of the first switch tube 1231 is connected to the external analysis device 400. One end of the third pull-up resistor 1235 is connected to the source of the first switch tube 1231, and the other end of the third pull-up resistor 1235 is connected to the gate of the first switch tube 1231 and the external power supply respectively, so as to realize the conversion of the voltage level of the clock signal. When the gate voltage of the first switch tube 1231 is higher than the voltage threshold of the first switch tube 1231, the first switch tube 1231 is in a conductive state, and the source of the first switch tube 1231 sends the level of the clock signal received by the first switch tube 1231 to the external analysis device 400, so as to analyze the data of the clock signal. When the gate voltage of the first switch tube 1231 is lower than the voltage threshold of the first switch tube 1231, the first switch tube 1231 is in a cut-off state, and the source of the first switch tube 1231 outputs the power supply voltage of the external power supply connected to the third pull-up resistor 1235.

[0045] In addition, one end of the second filter capacitor 1234 is connected to the drain of the first switch tube 1231, the other end of the second filter capacitor 1234 is grounded, one end of the first pull-up resistor 1233 is connected to the drain of the first switch tube 1231, and the other end of the first pull-up resistor 1233 is connected to the external power supply. When the first switch tube 1231 is in a cut-off state, the first pull-up resistor 1233 makes the drain of the first switch tube 1231 in a high level state, so as to maintain the required logic level. The third pin and the fourth pin of the clock signal header connector 1317 are respectively connected to the clock signal transmission line 123, so as to collect the clock signal sent by the VGA interface 111, and send it to the connected external measurement tool 300, so as to measure the collected clock signal.

[0046] The data signal line 124 comprises a second switch tube 1241, a second switch control module 1242, and a second pull-up resistor 1243, and the second switch control module 1242 further comprises a fourth pull-up resistor 1244. The drain electrode of the second switch tube 1241 is connected to the twelfth pin of the VGA interface 111, the source electrode of the second switch tube 1241 is connected to the external analysis equipment 400, one end of the fourth pull-up resistor 1244 is connected to the source electrode of the second switch tube 1241, and the other end of the fourth pull-up resistor 1244 is connected to the gate electrode of the second switch tube 1241 and the external power supply respectively, so as to realize the conversion of the voltage level of the to-be-measured signal. When the voltage at the gate electrode of the second switch tube 1241 is higher than the voltage threshold of the second switch tube 1241, the second switch tube 1241 is in a conductive state, and the source electrode of the second switch tube 1241 sends the level of the data signal received by the second switch tube 1241 to the external analysis equipment 400, so as to perform data analysis on the data signal; when the voltage at the gate electrode of the second switch tube 1241 is lower than the voltage threshold of the second switch tube 1241, the second switch tube 1241 is in a cut-off state, and the source electrode of the second switch tube 1241 outputs the power supply voltage of the external power supply connected to the fifth pull-up resistor 1244.

[0047] In addition, one end of the second pull-up resistor 1243 is connected to the drain electrode of the second switch tube 1241, and the other end of the second pull-up resistor 1243 is connected to the external power supply. When the second switch tube 1241 is in a cut-off state, the second pull-up resistor 1243 makes the drain electrode of the second switch tube 1241 in a high level state, so as to maintain the required logic level. The third pin and the fourth pin of the data signal pin connector 1318 are respectively connected to the data signal transmission line 124, and the first pin and the second pin of the data signal pin connector 1318 are used to collect the data signal sent by the VGA interface 111 and send it to the connected external measurement tool 300, so as to perform signal measurement on the collected data signal.

[0048] In summary, by using the VGA interface 111 to connect with the electronic equipment 200, the to-be-measured signal transmitted by the electronic equipment 200 can be received without disassembling the electronic equipment 200, so that the measurement process of the to-be-measured signal is more convenient and easy to operate. In addition, the measurement interface 130 of the present scheme uses the pin connector 131 as the connection interface between the signal transmission line 120 and the external measurement tool 300 (such as an oscilloscope probe), so that the probe of the measurement tool 300 can be inserted and fixed to collect the to-be-measured signal, avoiding the influence of human-caused connection problems on the signal measurement result, and improving the accuracy of signal measurement.

[0049] It should be noted that the embodiment of the apparatus described above is merely illustrative, and the units described as separate units can or can not be physically separate, and the units displayed as units can or can not be physical units, i.e. can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment of the present application according to actual needs.

[0050] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features in the above examples or different examples can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in detail for simplicity; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A signal measurement fixture, comprising: The application relates to a signal transmission device. The signal transmission device comprises a connection interface, a signal transmission line and a measurement interface. The connection interface is used for connecting an electronic device, receiving a to-be-tested signal sent by the electronic device and sending the to-be-tested signal to the signal transmission line. The signal transmission line is respectively connected in communication with the connection interface and an external analysis device, and is used for sending the received to-be-tested signal to the analysis device. The analysis device receives the to-be-tested signal and performs data analysis on the to-be-tested signal to determine whether the to-be-tested signal meets a protocol standard.

2. The signal measurement fixture of claim 1, wherein, One end of the measurement interface is connected in communication with the signal transmission line, and the other end of the measurement interface is used for connecting an external measurement tool so that the measurement tool collects the to-be-tested signal to perform signal measurement.

3. The signal measurement fixture of claim 2, wherein, The signal transmission line comprises a video signal transmission line, a synchronization signal transmission line, a clock signal transmission line and a data signal transmission line.

4. The signal measurement fixture of claim 2, wherein, The video signal transmission line further comprises a first impedance matching element, one end of the first impedance matching element is connected with the video signal transmission line, and the other end of the first impedance matching element is grounded.

5. The signal measurement fixture of claim 4, wherein, The synchronization signal transmission line comprises a second impedance matching element, one end of the second impedance matching element is connected with the connection interface, and the other end of the second impedance matching element is connected with the analysis device.

6. The signal measurement fixture of claim 2, wherein, The synchronization signal transmission line further comprises a first filter capacitor, one end of the first filter capacitor is connected with the second impedance matching element, and the other end of the first filter capacitor is grounded. The clock signal transmission line comprises a first switch tube, a first switch control module and a first pull-up resistor.

7. The signal measurement fixture of claim 6, wherein, The drain of the first switch tube is connected with the first pull-up resistor and the connection interface respectively, the gate of the first switch tube is connected with the first switch control module, and the source of the first switch tube is connected with the analysis device.

8. The signal measurement fixture of claim 7, wherein, The clock signal transmission line further comprises a second filter capacitor, one end of the second filter capacitor is connected with the drain of the first switch tube, and the other end of the second filter capacitor is grounded. The data signal transmission line comprises a second switch tube, a second switch control module and a second pull-up resistor.

9. The signal measurement fixture of claim 1, wherein, The drain of the second switch tube is connected with the second pull-up resistor and the connection interface respectively, the gate of the second switch tube is connected with the second switch control module, and the source of the second switch tube is connected with the analysis device.

10. The signal measurement fixture of claim 1, wherein, The connection interface comprises a VGA interface. The measurement interface comprises a row pin connector.

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