Wireless Sub-1G product radio frequency production measurement system and electronic equipment

Abstract

The utility model relates to the technical field of product testing, in particular to a wireless Sub-1G product radio frequency production testing system and electronic equipment. The system comprises a PC terminal, a jig, a converter, a multi-split radio frequency converter and a comprehensive tester. The PC end is connected with the first end of the comprehensive testing instrument through a first serial port, the second end of the comprehensive testing instrument is connected with the output end of the multi-split radio frequency converter, the input end of the multi-split radio frequency converter is connected with the first end of the jig, and the second end of the jig is connected with the PC end, so that the PC end controls the comprehensive testing instrument to send VSG signals through the first serial port. The product to be tested feeds back the receiving packet number to the PC end based on the VSG signal; the PC terminal is also used for controlling the to-be-tested product to enter a transmitting mode so as to sample the transmitting power and the frequency point value of the to-be-tested product; the PC end is also connected with the control end of the multi-split radio frequency converter through a second serial port, and is used for switching a new to-be-tested product as a test target. According to the invention, the high-precision, high-consistency and high-efficiency production and measurement requirements of the radio frequency front end of a wireless Sub-1G product can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of product testing, and in particular to a wireless Sub-1G product radio frequency production measurement system and an electronic device. BACKGROUND

[0002] Currently, the production measurement of the radio frequency front end of the wireless Sub-1G product mainly adopts an RSSI signal strength determination method, wherein the wireless Sub-1G product refers to a wireless communication device working in a frequency band lower than 1 GHz. The method uses the fast network configuration between the DUT product and the wireless dongle (adapter) to obtain the current RSSI signal strength (Received Signal Strength Indication), and determines the qualification of the product radio frequency front end according to the set RSSI range. This technology has the advantages of low cost, high mobility, less increase of production measurement code required for the main control MCU, simple trigger condition logic, etc.

[0003] However, this method also has obvious disadvantages and product risks. First, RSSI is an indication of received signal strength, which is difficult to accurately represent the product transmission or reception capability. Second, RSSI is affected by factors such as test environment and coordinator directivity, and the test result has large fluctuations, so the determination standard can only use a range value and cannot accurately locate the problem.

[0004] In summary, the limitations of the prior art make it impossible to meet the high-precision, high-consistency, and high-efficiency production measurement requirements of the radio frequency front end of the wireless Sub-1G product, and it is urgent to seek a more advanced technical solution to solve the above problems. CONTENT OF THE INVENTION

[0005] In order to overcome the shortcomings of the prior art, the present application provides a wireless Sub-1G product radio frequency production measurement system and an electronic device to meet the high-precision, high-consistency, and high-efficiency production measurement requirements of the radio frequency front end of the wireless Sub-1G product.

[0006] The technical solution adopted by the present application to solve its technical problems is:

[0007] In a first aspect, the present application provides a wireless Sub-1G product radio frequency production measurement system, which comprises a PC end, a fixture, a converter, a multi-drop radio frequency converter, and a comprehensive tester; the fixture is used to place at least one product to be tested;

[0008] The first end of the PC end is connected with the measuring instrument, the second end of the measuring instrument is connected with the output end of the one-to-many radio frequency converter, the input end of the one-to-many radio frequency converter is connected with the first end of the jig, the second end of the jig is connected with the PC end through the first serial port, the PC end controls the measuring instrument to send a VSG signal, and the to-be-tested product feeds back a received packet number to the PC end based on the VSG signal; the PC end controls the to-be-tested product to enter a transmission mode to sample the transmission power and frequency point value of the to-be-tested product.

[0009] The PC end is further connected with the control end of the one-to-many radio frequency converter through the second serial port, and is used for switching a new to-be-tested product as a test target.

[0010] Optionally, the jig comprises a shielding box and a DUT product clamp.

[0011] The first end of the shielding box is connected with the one-to-many radio frequency converter.

[0012] The second end of the shielding box is connected with the PC end through the first serial port, and is used for starting or closing the shielding box based on a control signal sent by the PC end through the first serial port.

[0013] Optionally, the shielding box comprises a processing unit and a one-to-many serial port conversion board.

[0014] The first end of the processing unit is connected with the one-to-many radio frequency converter.

[0015] The second end of the processing unit is connected with the first end of the one-to-many serial port conversion board through a third serial port, and the second end of the one-to-many serial port conversion board is connected with the PC end through the first serial port.

[0016] Optionally, the processing unit comprises an MCU and a plurality of RF radio frequency front ends.

[0017] Optionally, the first serial port and the second serial port are UAT serial ports.

[0018] Optionally, the third serial port is a UAT serial port.

[0019] In a second aspect, the present application provides an electronic device loaded with the wireless Sub-1G product radio frequency measurement system.

[0020] The beneficial effects of the present application are: the system sends VSG signals through the PC terminal control to test the receiving sensitivity and transmitting power, frequency point value of the DUT product, and feeds back the test results to the PC terminal in real time through serial communication, realizing the automatic and accurate testing of the DUT product. The system abandons the traditional test mode which only relies on the RSSI signal strength, and more accurately and reliably evaluates the performance of the product radio frequency front end by measuring multiple key indicators such as the number of received packets, transmitting power and frequency point value, effectively reducing the product risk and improving the precision and consistency of the product. At the same time, the system uses a multi-tap radio frequency converter to realize the simultaneous testing of multiple DUT products, greatly improving the testing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the first structural schematic diagram of a wireless Sub-1G product radio frequency testing system provided by the embodiments of the present application;

[0022] Figure 2 is the second structural schematic diagram of a wireless Sub-1G product radio frequency testing system provided by the embodiments of the present application. DETAILED DESCRIPTION

[0023] The present application will be further described below in combination with the drawings and embodiments.

[0024] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, all the coupling / connections involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation. The technical features in the creation of the present application can be combined interactively without contradiction and conflict.

[0025] REFERENCE Figure 1 , Figure 1 is the first structural schematic diagram of a wireless Sub-1G product radio frequency testing system provided by the embodiments of the present application, the system comprising: a PC terminal, a fixture, a converter, a multi-tap radio frequency converter and a comprehensive tester; the fixture is used for placing at least one product to be tested, which will be described in detail below:

[0026] The first end of the PC end is connected with the harness tester, the second end of the harness tester is connected with the output end of the one-to-many radio frequency converter, the input end of the one-to-many radio frequency converter is connected with the first end of the jig, the second end of the jig is connected with the PC end through the first serial port UAT1, the PC end controls the harness tester to send a VSG signal, and the product to be tested feeds back a received packet number to the PC end; the PC end controls the product to be tested to enter a transmitting mode, so as to sample the transmitting power and frequency point value of the product to be tested.

[0027] One or more DUT products (Device Under Test, measured device) are placed in the jig, and the current DUT device is determined as the measured device.

[0028] Specifically, the PC end first controls the jig to start up by power-on through the first serial port UAT1, and closes the shielding box of the jig after the jig is powered on, so as to notify the current measured product to enter a receiving mode by issuing an instruction through the PC end.

[0029] The jig includes a shielding box and a DUT product clamp.

[0030] The first end of the shielding box is connected with the one-to-many radio frequency converter.

[0031] The second end of the shielding box is connected with the PC end through the first serial port UAT1, and the shielding box is started or closed based on a control signal sent by the PC end through the first serial port UAT1.

[0032] Specifically, the shielding box has the functions of isolating external interference, absorbing internal radio frequency signals, and protecting test personnel, and when the product is not tested, the shielding box is in an open state; the DUT product clamp serves as an intermediate medium between the measured object (DUT) and the testing instrument, is responsible for stably and accurately connecting the DUT and the instrument, ensures that the position of the DUT is fixed during the test, and avoids test errors caused by movement or shaking.

[0033] Then, the PC end controls the harness tester to enter a VSG signal transmitting mode, and sends a waveform file recorded by a preset number of packets. In this application, 100 packets are taken as an example for convenience of description. After a certain time delay, the PC end notifies the measured product to report the number of received packets, and the PC end can determine the receiving sensitivity of the current measured product according to the feedback packet number and the actual sent packet number. The ratio of the received packet number to the sent packet number can be used as a judgment reference, and when the number of received packets reaches a preset proportion of the number of sent packets (for example, 95%), it is determined that the receiving sensitivity of the measured product is qualified.

[0034] In a possible implementation, if it is determined that the receiving sensitivity of the product under test is unqualified, the subsequent other tests can be selected not to be performed, and the product under test is directly determined as an abnormal product, so as to improve the test efficiency.

[0035] The VSG (Vector Signal Generator) signal is an instrument capable of generating complex modulated signals, and can generate various complex modulated signals, including but not limited to sine waves, square waves, pulse signals, amplitude modulation signals, frequency modulation signals, etc.

[0036] The first serial port UAT1, the second serial port UAT2 and the third serial port UAT3 are used for serial communication, which is a communication mode of sending and receiving bytes by bits, and is used for data transmission, synchronization, verification and the like.

[0037] Further, the PC notifies the product under test to enter the transmitting mode through the first serial port UAT1. The notification means that the PC sends a specific control command or signal to the product under test, so that the product under test enters the transmitting mode. In the transmitting mode, the product under test starts to transmit the radio frequency signal. At the same time, the comprehensive tester (comprehensive tester) starts the receiving mode of the vector signal analyzer (VSA). In the receiving mode of the VSA, the comprehensive tester can capture the radio frequency signal currently transmitted by the product under test in real time, measure the transmitting power and frequency point value, and feed back to the PC host computer.

[0038] Further, the PC (host computer) receives the transmitting power and frequency point value of the product under test fed back by the comprehensive tester, and internally presets an expected power value and a center frequency value. The two values are usually preset according to the product specification or test requirements. After receiving the actual measurement values, the PC host computer compares the two actual values with the preset expected values. For the power, it can be checked whether the actual transmitting power is within the allowed range (such as between the minimum and maximum thresholds); for the frequency point, the deviation of the actual frequency point from the preset center frequency point, i.e., the frequency offset, is calculated.

[0039] Further, according to the comparison result, the PC can make a final determination on the power and frequency point performance of the product under test. If the actual transmitting power is within the allowed range, and the frequency offset is also within the acceptable range, it is determined as qualified; otherwise, it is determined as unqualified.

[0040] By using the above wireless Sub-1G product RF production measurement system provided by the embodiment of the application, the receiving capability of the to-be-tested product is first tested and recorded, and then the transmitting capability of the to-be-tested product is tested and recorded, so as to avoid the case that the test result cannot be used to determine whether the to-be-tested product is abnormal in transmitting capability or receiving capability, thereby improving the product accuracy and consistency. The consistency refers to the consistency of the performance effect between the product RF performance and the controlled product in the early stage of research and development.

[0041] Further, after the determination is made, the PC end echoes the test result in a visual manner at the corresponding position, for example, sets a user interface or a report to display the to-be-tested product number and its performance data and determination result on each test item, and the tester can understand the overall test situation of the DUT by checking the interface or the report, including which item passes the test, which item fails the test, and the specific performance parameters, so as to facilitate the tester to quickly identify the problem and perform subsequent processing, such as adjusting the to-be-tested product parameters, troubleshooting, and the like.

[0042] Further, the PC end also connects the control end of the one-to-many RF converter through a second serial port UAT2, for switching a new to-be-tested product as a test target.

[0043] Specifically, by using the one-to-many RF converter, the RF performance of multiple DUTs can be tested at a time, thereby significantly improving the test efficiency and reducing the test time and cost.

[0044] More specifically, after the above test on the current to-be-tested product is completed, the test target is switched to a new to-be-tested product by using the one-to-many RF converter, thereby realizing one-to-many production measurement. According to actual measurement, the application can test about 10 to-be-tested products within 1 minute.

[0045] Reference Figure 2 , Figure 2 is a second structural schematic view of the wireless Sub-1G product RF production measurement system provided by the embodiment of the application, and is relative to Figure 1 More technical features are disclosed, and it can be seen that the shielding box includes a processing unit and a one-to-many serial port conversion board;

[0046] The first end of the processing unit is connected to the one-to-many RF converter;

[0047] The second end of the processing unit is connected to the first end of the one-to-many serial port conversion board through a third serial port UAT3, and the second end of the one-to-many serial port conversion board is connected to the PC end through the first serial port UAT1.

[0048] Specifically, the main function of the one-to-many serial port conversion board is to input serial data from one signal line, analyze and process it through the processor chip, and then output control signals through multiple serial port connectors. By using the one-to-many serial port conversion board, the connection work in the test process can be simplified, and the number of required serial ports and physical connection lines can be reduced. Among them, the one-to-many serial port conversion board is connected with the processing unit through the third serial port UAT3.

[0049] More specifically, the processing unit includes an MCU and several RF radio frequency front ends.

[0050] Specifically, the MCU controls the RF radio frequency front end to transmit or receive radio frequency signals according to a specific frequency, power, and modulation method by executing the control instructions sent by the PC end of the upper computer.

[0051] In addition, before using the wireless Sub-1G product radio frequency test system provided in the present application, a test environment needs to be built based on the system. The steps of building the environment are described in detail as follows:

[0052] First, use the comprehensive tester to turn on the function of capturing and recording waveforms. The purpose is to record the signals transmitted by the product to be tested. By generating a test waveform file, the transmission performance of the DUT can be analyzed in detail. It is worth noting that this process can be carried out in a shielding box to eliminate the interference of external signals and ensure the accuracy of the test results.

[0053] Further, a known qualified product (A product) is used to debug and calibrate the current test fixture environment. By comparing the performance of the A product in the current test environment and the known good environment, the fixture environment can be adjusted to ensure its accuracy and consistency. Among them, the qualified product can use the qualified sample product provided by the quality department.

[0054] Further, the comprehensive tester transmits a preset number (for example, 100) of data packets (waveform files) at a certain power, and then adjusts and determines the minimum packet transmission power of the comprehensive tester according to the number of data packets (for example, not less than 95%) that the A product can successfully receive. This minimum packet transmission power is then used as the standard packet transmission power for the product reception test in the current test environment.

[0055] Further, the product to be tested (A product) is set to transmit mode, and the comprehensive tester enters capture mode to capture the maximum transmission power of the DUT. According to the captured maximum transmission power, the transmission power determination standard of the product in the current test environment is set within a certain range (for example, ±2dB).

[0056] Secondly, the present application provides an electronic device loaded with the above-mentioned wireless Sub-1G product radio frequency test system.

[0057] The above describes the preferred embodiments of the present application, but the present application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A radio frequency (RF) production test system for wireless Sub-1G products, characterized in that, The system includes: a PC, a fixture, a converter, a multi-channel RF converter, and a comprehensive test instrument; the fixture is used to hold at least one product under test. The PC is connected to the first end of the comprehensive test instrument, the second end of the comprehensive test instrument is connected to the output end of the multi-channel RF converter, the input end of the multi-channel RF converter is connected to the first end of the fixture, and the second end of the fixture is connected to the PC via a first serial port. This is used for the PC to control the comprehensive test instrument to send a VSG signal, and for the product under test (DUT) to feed back the number of received packets to the PC based on the VSG signal. Furthermore, the PC is used to control the DUT to enter a transmit mode to sample the transmit power and frequency value of the DUT. The PC is also connected to the control terminal of the multi-channel RF converter via a second serial port, which is used to switch to a new product under test as the test target.

2. The radio frequency testing system for wireless Sub-1G products according to claim 1, characterized in that, The fixture includes a shielding box and a DUT product clamp; The first end of the shielding box is connected to the multi-channel RF converter; The second end of the shielding box is connected to the PC via the first serial port, and is used to start or stop the shielding box based on the control signal sent by the PC via the first serial port.

3. The radio frequency testing system for wireless Sub-1G products according to claim 2, characterized in that, The shielding box includes a processing unit and a multi-port serial port conversion board; The first end of the processing unit is connected to the multi-channel RF converter; The second end of the processing unit is connected to the first end of the multi-port serial port conversion board via the third serial port, and the second end of the multi-port serial port conversion board is connected to the PC via the first serial port.

4. The radio frequency testing system for wireless Sub-1G products according to claim 3, characterized in that, The processing unit includes an MCU and several RF front-ends.

5. The radio frequency testing system for wireless Sub-1G products according to claim 1, characterized in that, The first serial port and the second serial port are UAT serial ports.

6. The radio frequency testing system for wireless Sub-1G products according to claim 3, characterized in that, The third serial port is a UAT serial port.

7. An electronic device, characterized in that, It is equipped with a radio frequency production test system for wireless Sub-1G products as described in any one of claims 1-6.

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