CN112821965A - WIFI radio frequency test system and method - Google Patents
WIFI radio frequency test system and method Download PDFInfo
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Abstract
The application relates to a WIFI radio frequency test system and a method, which belong to the field of automatic test technology, wherein the test system comprises a control server, a shielding box, a parameter test device, an attenuator and a high-frequency probe; the parameter testing device is used for measuring the emission index of the emission signal of the tested product and outputting a second signal; the control server is loaded with factory testing software; the input end of the attenuator is connected with the high-frequency probe through a radio-frequency cable; the high-frequency probe is arranged in the shielding box and is used for being connected with an RF head of a product to be tested; the shielding box is used for bearing a product to be tested; and based on the test system, a WIFI radio frequency test method is provided. Compared with the related art, the method and the device have the effect of improving the testing efficiency under the condition of ensuring lower cost.
Description
Technical Field
The application relates to the field of automatic testing technology, in particular to a WIFI radio frequency testing system and method.
Background
With the rapid development of mobile communication technology, the coverage of wireless networks is wider and wider, and with the popularization of various wireless network products, consumer electronics products such as mobile phones, tablets, sound equipment, notebook computers, floor sweeping machines and the like gradually become an essential part of people's lives. People have an increasing demand for consumer electronics, and the demand promotes development and production, and products on an electronic product production line are continuously updated, which means that tooth equipment applied to the production line also faces the updating demand.
The functions of consumer electronics are increasing, the performance requirements on the bottom hardware supporting the functions of the electronics are also increasing, and the functions of test equipment to be tested are also increasing, which puts higher requirements on the test equipment. The existing testing equipment has low cost, poor testing stability and low testing speed, so that the testing efficiency is low.
Disclosure of Invention
In order to improve the testing efficiency under the condition of ensuring lower cost, the WIFI radio frequency testing system and the WIFI radio frequency testing method are provided.
In a first aspect, the present application provides a WIFI radio frequency testing system, which adopts the following technical scheme:
a WIFI radio frequency test system comprises a control server, a shielding box, a parameter test device, an attenuator and a high-frequency probe; wherein,
the input port of the parameter testing device is connected with the output end of the attenuator through a radio frequency cable and is used for measuring the emission index of the emission signal of the tested product and outputting a second signal;
the control server is loaded with factory test software and used for controlling a tested product to output a first signal through the factory test software and controlling the parameter testing device to output a second signal, and the factory test software reads a receiving index of the tested product and an emitting index measured by the parameter testing device;
the input end of the attenuator is connected with the high-frequency probe through a radio-frequency cable;
the high-frequency probe is arranged in the shielding box and is used for being connected with an RF head of a product to be tested;
the shielding box is used for bearing a product to be tested;
the transmitting indexes comprise transmitting power, error vector amplitude, frequency offset and a frequency offset template, and the receiving indexes comprise receiving sensitivity and packet loss rate.
By adopting the technical scheme, after the attenuator, the high-frequency probe and the parameter testing device are connected, the tested product is put into the shielding box and connected with the high-frequency probe, the control service end is communicated with the tested product, when the emission indication test is carried out, the control service end controls the tested product to input and output first signals corresponding to each frequency point in sequence through factory testing software, and reads each emission index measured by the parameter testing device through the factory testing software, when the index test is received, the control service end controls the parameter testing device to output second signals corresponding to each frequency point to the tested product, the factory testing software on the control service end reads each receiving index of the tested product after receiving the second signals, so as to realize the debugging of the tested product, and in the debugging process, each debugging process is controlled by the combined action of the control service end and the factory testing software without manual control, the WIFI radio frequency automatic testing device can shorten testing and debugging time and achieve WIFI radio frequency automatic testing, is simple to debug and can be copied quickly, and therefore testing efficiency is improved under the condition that cost is low.
Optionally, one side opening of shielding case sets up, on the shielding case and be close to open-ended position department slip and be provided with and be used for sheltering from the open-ended chamber door, be provided with the gliding first driving piece of drive chamber door on the shielding case, be provided with the tray in the shielding case, it is provided with the anchor clamps that are used for the centre gripping to be surveyed the product to slide on the tray, be provided with the gliding second driving piece of length direction of drive anchor clamps along the tray on the tray, be provided with the third driving piece that is used for driving the high frequency probe and is close to or keeps away from the product of being surveyed in the.
Through adopting above-mentioned technical scheme, open the chamber door, can pull out the shielded cell with anchor clamps along the length direction of tray in, so that change or place new product under test, with the new anchor clamps of product under test slip back shielding incasement back, start the third subassembly, it is the RF head connection that the product was surveyed to the high frequency probe is close to and final back, thereby be convenient for realize changing the effect of product under test and connecting high frequency probe and product under test, and is simple and convenient, reduce the used time of test preparation work, further improve the effect of quick reproduction.
Optionally, the third driving part includes a third cylinder, a piston rod of the third cylinder is provided with a supporting plate, and the high-frequency probe is detachably disposed on the supporting plate.
Through adopting above-mentioned technical scheme, start the third cylinder, can make the layer board drive high frequency probe and be close to or keep away from the product under test, and then be convenient for realize high frequency probe and be connected and release between the product under test.
Optionally, the test system further includes a signal forwarding device, the signal forwarding device communicates with the control server through an ethernet, the signal forwarding device communicates with the parameter testing apparatus through the ethernet, an output interface of the signal forwarding device is connected with a serial port line, and the other end of the serial port line is used for being connected with a signal input end of the tested product.
By adopting the scheme, the signal forwarding equipment plays a role in exchanging input and output signals, can forward the control command sent by the control server through the factory test software to the tested product or the parameter testing device, and can also read the data of the tested product through the transfer serial port line and send the data to the factory test software on the control server, thereby being convenient for receiving or sending signals.
Optionally, the signal forwarding device includes, but is not limited to, any one of a switch and a multi-port repeater.
Optionally, the test system further includes an entry device, the entry device is in communication connection with the control server, and the control server is used for entering information of the tested product through scanning a bar code on the tested product by the entry device.
By adopting the technical scheme, the information of the tested product can be input by scanning the two-dimensional code on the tested product, and the manual input of a tester is not needed, so that the time for testing can be shortened, and the testing efficiency is further improved.
In a second aspect, the present application provides a WIFI radio frequency testing method, which adopts the following technical scheme:
a WIFI radio frequency test method comprises the following steps,
calibrating a radio frequency channel, connecting the radio frequency channel consisting of the parameter testing device, the radio frequency cable and the high-frequency probe, and measuring the insertion loss value of the radio frequency channel on each frequency point to obtain a calibration file;
the testing path wiring is used for connecting the tested product to the radio frequency path and connecting the testing path of the tested product according to the wiring mode of the tested product during testing;
debugging the emission index, namely updating and placing a calibration file into an engineering catalog of factory test software based on a connected test access to debug the emission index of a tested product, wherein the emission index comprises emission power, error vector amplitude, frequency offset and a frequency offset template; and the number of the first and second groups,
and receiving index debugging, updating and placing the calibration file into an engineering catalog of factory test software based on the connected test access, and debugging the receiving index of the tested product, wherein the receiving index comprises receiving sensitivity and packet loss rate.
By adopting the technical scheme, during testing, the insertion loss value of a radio frequency channel formed by the parameter testing device, the radio frequency cable and the high-frequency probe is measured firstly, a calibration file is obtained, then a tested product is connected into the radio frequency channel and is well connected with a test standard, the calibration file in factory test software is updated, the emission index debugging of the tested product is carried out, the calibration file is updated again, the reception index debugging is carried out, the debugging process is controlled by the control service end through the factory test software, manual control is not needed, the test debugging time can be shortened, the WIFI radio frequency automatic testing is realized, the debugging is simple, rapid copying can be realized, and the testing efficiency is improved under the condition of ensuring lower cost.
Optionally, the debugging of the emission index includes the following steps:
a first calibration file updating step, namely updating the calibration file at a control server and placing the calibration file in an engineering catalog of factory test software;
a step of transmitting a first signal, which is to judge whether the connection of the test access is correct or not and judge whether the calibration is completed or not, if so, the factory test software controls the tested product to transmit the first signal with a certain power output value, and if not, the radio frequency access calibration is entered again; and the number of the first and second groups,
and a step of testing the emission index, namely checking the measured power value of the first signal on the parameter measuring device, judging whether the loss value between the power output value and the power measured value is consistent with the insertion loss threshold value corresponding to the frequency point, if so, continuing to measure the rest of the receiving index, and otherwise, re-entering the radio frequency channel for calibration.
By adopting the technical scheme, when the emission indexes are debugged, whether the loss between the output value and the measured value of the first signal is consistent with the insertion loss value of the corresponding frequency point or not is measured, if so, the residual emission indexes are continuously tested, otherwise, the calibration is carried out again, the residual emission indexes are measured on the premise that the measured first signal is reasonable, namely, the emission power is correct, and then the tested emission indexes are all in a reasonable range, so that the debugging of the emission indexes has higher stability.
Optionally, the receiving metrics debugging includes the following steps,
a second calibration file updating step, namely updating the calibration file at the control server and placing the calibration file in an engineering catalog of the factory test software;
outputting a second signal, namely judging whether the connection of the test access is correct or not, judging whether the calibration is finished or not, if so, controlling the parameter testing device to transmit a second signal to a tested product by a certain power output value through factory test software, and if not, entering the radio frequency access calibration; and the number of the first and second groups,
and testing the receiving indexes, namely obtaining the receiving sensitivity by factory test software through signal forwarding equipment, judging whether the receiving sensitivity meets the set requirement, if so, continuously measuring the rest receiving indexes, and otherwise, checking the crimping condition of the shielding box and retesting.
By adopting the technical scheme, when the receiving index is debugged, the receiving sensitivity is determined to meet the set requirement and then the residual transmitting index is tested, otherwise, the crimping condition of the shielding box is rechecked to ensure the shielding performance stability of the shielding box to a certain extent, and the residual receiving index is measured again on the premise of determining the better shielding performance of the shielding box, so that the tested receiving index better meets the actual receiving performance of the tested product, and the debugging of the receiving index has higher stability.
Optionally, the method for testing the connection of the access comprises,
connecting one end of a switching serial port line with an input/output interface of a tested product, and connecting the other end of the switching serial port line with an input/output port of signal forwarding equipment;
one end of the attenuator is connected with the high-frequency probe through a radio frequency cable, and the other end of the attenuator is connected with the output end of the parameter testing device through the radio frequency cable; and the number of the first and second groups,
and starting the third air cylinder to enable the high-frequency probe to be close to and connected with the RF head of the tested product.
Drawings
Fig. 1 is a schematic structural diagram of a WIFI radio frequency testing system according to an embodiment of the present application.
Fig. 2 is a schematic structural view of the entire shield box according to the embodiment of the present application.
Fig. 3 is a schematic cross-sectional structure diagram of a shielding box according to an embodiment of the present application.
Fig. 4 is a partial structural schematic diagram of a shielding box according to an embodiment of the present application.
Fig. 5 is a schematic diagram of an exploded structure for showing the connection relationship between the clamp and the tray according to the embodiment of the present application.
Fig. 6 is a first flowchart of a WIFI radio frequency testing method according to an embodiment of the present application.
Fig. 7 is a second flowchart of a WIFI radio frequency testing method according to an embodiment of the present application.
Fig. 8 is a third flowchart of a WIFI radio frequency testing method in an embodiment of the present application.
Fig. 9 is a fourth flowchart of a WIFI radio frequency testing method according to an embodiment of the present application.
Description of reference numerals: 11. an opening; 12. a first chute; 13. a box door; 14. a first slider; 2. a tray; 21. a second chute; 3. a clamp; 31. a second slider; 4. a first rodless cylinder; 5. a second rodless cylinder; 6. a third cylinder; 61. a support plate; 62. a high-frequency probe; 101. controlling a server; 1011. factory test software; 102. a shielding box; 103. a parameter testing device; 104. an attenuator; 105. a signal forwarding device; 106. and (4) recording equipment.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
The factory test software 1011, namely the factory test software, is software designed for testing the WIFI/BLE product, and has the functions of judging a bar code of the tested product, judging a communication port, controlling test instruments such as the parameter testing device 103, controlling a test process, judging a test result, uploading the test result to a server and the like. The factory test software 1011 is a common test software, and the embodiment will not be further described.
The embodiment of the application discloses a WIFI radio frequency test system. Referring to fig. 1, the WIFI radio frequency testing system includes a control server 101, a shielding box 102, a parameter testing device 103, an attenuator 104, and a high frequency probe 62; wherein,
the input port of the parameter testing device 103 is connected with the output end of the attenuator 104 through a radio frequency cable, and is used for measuring the emission index of the emission signal of the tested product and outputting a second signal;
the control server 101 is provided with factory test software 1011, the factory test software 1011 is provided, and the control server is used for controlling the tested product to output a first signal through the factory test software 1011 and controlling the parameter testing device 103 to output a second signal, and the factory test software 1011 reads a receiving index of the tested product and an emission index measured by the parameter testing device 103;
an attenuator 104, the input end of which is connected with the high-frequency probe 62 through a radio frequency cable;
the high-frequency probe 62 is arranged in the shielding box 102 and is used for being connected with an RF head of a product to be tested;
and the shielding box 102 is used for bearing the product to be tested.
The transmitting indexes include but are not limited to transmitting power, error vector magnitude, frequency offset and frequency offset templates, and the receiving indexes include but are not limited to receiving sensitivity and packet loss rate. The attenuator 104 plays a role of buffering impedance changes, can adjust the impedance matching condition of the high-frequency probe 62 and the circuit board of the product to be tested, and sets the power of the radio frequency channel within the optimal test value range of the parameter testing device 103 in the testing process, and in actual use, the size of the attenuator 104 is selected according to the impedance matching value required by the product to be tested actually.
The shielding box 102 can provide a relatively interference-free testing environment for the tested product, and reduce the interference of external signals to the debugging work of the tested product, so that the testing environment of the tested product is closer to the research and development environment.
In the above embodiment of the WIFI radio frequency testing system, after the attenuator 104, the high frequency probe 62 and the parameter testing device 103 are connected, the tested product is placed in the shielding box 102 and connected to the high frequency probe 62, the control server 101 communicates with the tested product, when the emission indication test is performed, the control server 101 controls the tested product to input and output the first signals corresponding to each frequency point in sequence through the factory testing software 1011, and reads each emission index measured by the parameter testing device 103 through the factory testing software 1011, when the index test is received, the control server 101 controls the parameter testing device 103 to output the second signal corresponding to each frequency point to the tested product, the factory testing software 1011 on the control server 101 reads each receiving index of the tested product after receiving the second signal, so as to implement the debugging of the tested product, during the debugging process, each debugging process is controlled by the combined action of the control server 101 and the factory testing software 1011, need not artificial control, can shorten test debugging time and realize the automatic test of WIFI radio frequency, the debugging is simple, can duplicate fast to improve efficiency of software testing under the lower condition of assurance cost.
Referring to fig. 1, as a further embodiment of the test system, the test system further includes a signal forwarding device 105, the signal forwarding device 105 communicates with the control server 101 through an ethernet, and the signal forwarding device 105 communicates with the parameter testing apparatus 103 through the ethernet, an output interface of the signal forwarding device 105 is connected with a serial-to-serial port line, and the other end of the serial-to-serial port line is used for being connected with a signal input end of a product under test.
The signal forwarding device 105 plays a role in exchanging input and output signals, can forward a control command sent by the control server 101 through the factory test software 1011 to the tested product or the parameter testing device 103, and can also read data of the tested product through the serial port line and send the data to the factory test software 1011 on the control server 101, thereby facilitating the receiving or sending of signals.
Referring to fig. 1, the test system further includes an entry device 106, the entry device 106 is in communication connection with the control server 101, and the control server 101 scans a barcode on the product to be tested through the entry device 106 and enters information of the product to be tested.
The communication between the entry device 106 and the control server 101 includes any one of wired communication and wireless communication. The information of the product to be tested includes the product's number, model, date of manufacture, etc.
The information of the tested product can be input by scanning the two-dimensional code on the tested product, and the information is not manually input by a tester, so that the time for testing can be shortened, and the testing efficiency is further improved.
As an embodiment of the parameter testing device 103, the parameter testing device 103 includes an integrated wireless network tester (IQVIEW), and a signal port of the integrated wireless network tester can transmit and receive signals as well as output signals.
As one embodiment of signal forwarding device 105, signal forwarding device 105 comprises any of a multi-port repeater, a switch, and the like.
As an embodiment of the entry device 106, the entry device 106 includes a barcode scanning gun.
Referring to fig. 2 and 3, as a further embodiment of the shielding box 102, an opening 11 on one side of the shielding box 102 is provided, a box door 13 is slidably disposed on a side wall of the shielding box 102 at a position close to the opening 11, and a first driving member for driving the box door 13 to slide is disposed on the side wall of the shielding box 102. The tray 2 is fixed in the shielding box 102 through a bolt connection mode and the like, the tray 2 is provided with a clamp 3 used for clamping a tested product in a sliding mode, and the tray 2 is provided with a second driving piece used for driving the clamp 3 to slide along the length direction of the tray 2. The high-frequency probe 62 is slidably disposed in the shielding box 102 along a height direction of the shielding box 102, and a third driving member for driving the high-frequency probe 62 to approach or depart from a product to be tested is disposed in the shielding box 102.
The sliding direction of the door 13 includes any one of the height direction and the width direction of the shield box 102.
Referring to fig. 2 and 4, a first dovetail sliding groove 12 is formed in the positions, close to the opening 11, on the side walls of the two sides of the shielding box 102 along the height direction of the shielding box 102, a first dovetail sliding block 14 is fixed on the box door 13, and the first sliding block 14 and the first sliding groove 12 are matched with each other. As an embodiment of the first driving member, the first driving member includes a first rodless cylinder 4, the first rodless cylinder 4 is disposed on an outer side wall of the shielding box 102 and near the opening 11, a length direction of the first rodless cylinder 4 is identical to a length direction of the shielding box 102, and a piston rod of the first rodless cylinder 4 is fixed on the box door 13 by welding. At this time, the sliding direction of the door 13 is along the height direction of the shield box 102.
When the sliding direction of the door 13 is the width direction of the shielding box 102, the positions of the first driving member, the first sliding groove 12 and the first sliding block 14 only need to be modified adaptively.
Referring to fig. 2 and 5, a dovetail-shaped second sliding groove 21 is formed in the tray 2 along the length direction of the tray 2, a dovetail-shaped second sliding block 31 is fixed to the fixture 3 by welding or bonding, and the second sliding groove 21 and the second sliding block 31 are matched with each other. As an embodiment of the second driving member, a second rodless cylinder 5 is fixed on the tray 2 along the length of the tray 2, and a piston rod of the second rodless cylinder 5 is fixed on the side wall of the clamp 3 and away from the box door 13.
Referring to fig. 2 and 3, as an embodiment of the third driving element, the third driving element includes a third cylinder 6, the third cylinder 6 is welded on the inner top wall of the shielding box 102, a supporting plate 61 is welded on a piston rod of the third cylinder 6, the supporting plate 61 is arranged opposite to the clamp 3, and the high-frequency probe 62 is fixed on the supporting plate 61 by means of a bolt connection.
It should be noted that the first rodless cylinder 4 and the second rodless cylinder 5 may be replaced by rodless electric cylinders, and the third cylinder 6 may be replaced by an electric cylinder, which can achieve the same driving effect.
The embodiment of the application also discloses a WIFI radio frequency testing method, referring to fig. 6, the testing method includes,
a radio frequency channel calibration 201, which is to connect a radio frequency channel composed of a parameter testing device, a radio frequency cable and a high-frequency probe, and measure the insertion loss value of the radio frequency channel on each frequency point to obtain a calibration file;
a test path wiring 202, which is used for connecting the tested product to the radio frequency path and connecting the test path of the tested product according to the wiring mode of the tested product during testing;
the emission index debugging 203 is used for updating the calibration file and placing the calibration file into an engineering catalog of factory test software based on the connected test access to debug the emission index of the tested product; and the number of the first and second groups,
and (5) receiving index debugging 204, updating the calibration file based on the connected test access, placing the calibration file in an engineering catalog of factory test software, and debugging the receiving index of the tested product.
The transmitting indexes comprise transmitting power, error vector amplitude, frequency offset and a frequency offset template, and the receiving indexes comprise receiving sensitivity and packet loss rate.
In the embodiment of the test method, during testing, the insertion loss value of a radio frequency channel composed of the parameter test device 103, the radio frequency cable and the high-frequency probe 62 is measured first, a calibration file is obtained, then a tested product is connected to the radio frequency channel and is well connected with the test channel, the calibration file in the factory test software 1011 is updated, the emission index debugging of the tested product is carried out, the calibration file is updated again, the reception index debugging is carried out, the debugging process is controlled by the control server 101 through the factory test software 1011, manual control is not needed, the test (debugging) time can be shortened, the automatic WIFI radio frequency test can be realized, the debugging is simple, the rapid copying can be realized, and the test efficiency is improved under the condition that the cost is low.
When a WIFI/BLE product is tested, the most important thing is that if the power level of a signal sent by the WIFI/BLE product is low, the communication quality becomes poor under the noise environment or multipath condition, so that the normal use of a user is influenced; if the signal power level sent by the WIFI/BLE product is higher, the communication of other users can be seriously influenced, and even the user capacity is reduced, so that strict and complex requirements are imposed on the signal power sent by the tested product.
The debugging of the transmission index is to perform relatively complete calibration from high power to low power on a specified channel so as to ensure that a tested product can accurately output required power levels to a certain extent to correct the nonlinearity of the output of the wireless equipment.
When the radio frequency channel is calibrated, the A-B channel of the network analyzer or the wireless network comprehensive tester is adopted for calibration, and the network analyzer or the wireless network comprehensive tester can be used for measuring the insertion loss value. Meanwhile, factory test software 1011 can be carried on the control server 101, and the factory test software 1011 is communicated with equipment for measuring the insertion loss value, so that the effect that the radio frequency channel calibration process is controlled by the factory test software 1011 at the control server 101, and the measured value of the insertion loss measuring equipment is read is achieved.
Referring to fig. 7, as an embodiment of the test path connection 202, the following steps are included:
2021. one end of the switching serial port line is connected with an input/output interface of a tested product, and the other end of the switching serial port line is connected with an input/output port of the signal forwarding equipment.
2022. One end of the attenuator is connected with the high-frequency probe through a radio frequency cable, and the other end of the attenuator is connected with the output end of the parameter testing device through the radio frequency cable.
2023. And starting the third air cylinder to enable the high-frequency probe to be close to and connected with the RF head of the tested product.
Referring to fig. 8, as an embodiment of the launch target debugging 203, the method includes the following steps:
2031. the method comprises a first calibration file updating step, wherein the calibration file is updated and placed in an engineering catalog of the factory test software at a control server.
2032. And a step of transmitting a first signal, namely judging whether the connection of the test access is correct or not, judging whether the calibration is completed or not, if so, controlling the tested product to transmit the first signal at a certain power output value through factory test software, and if not, re-entering the radio frequency access for calibration.
2033. And a step of testing the emission index, namely checking the measured power value of the first signal on the parameter measuring device, judging whether the loss value between the power output value and the power measured value is consistent with the insertion loss threshold value corresponding to the frequency point, if so, continuing to measure the rest of the receiving index, and otherwise, re-entering the radio frequency channel for calibration.
It should be noted that, in the process of the transmission index test, the factory test software 1011 first determines whether the transmission path (i.e., the test path) is correctly connected and whether the radio frequency path calibration is completed, and prompts a corresponding result, and after both are satisfied, the factory test software 1011 starts the channel road calibration and enters the transmission index debugging (test).
In the above embodiment of the transmission index debugging, when the transmission index is debugged, it is first measured whether the loss between the output value and the measured value of the first signal is consistent with the insertion loss value of the corresponding frequency point, if so, the remaining transmission index is continuously tested, otherwise, the calibration is performed again, on the premise that the measured first signal is determined to be reasonable, that is, the transmission power is correct, and then the remaining transmission index is measured, so that the tested transmission indexes are all in a reasonable range, and the debugging of the transmission index has high stability.
The basis of other emission indexes in the power test of the emission signal is that only the emission power is correct, and indexes such as error vector amplitude, frequency offset and frequency offset templates are in a reasonable range. In power testing, the more common problems are power-up and power-down. In the WIFI index test, the power output is divided into several levels (levels), different levels (levels) correspond to power values with different sizes, and the expression of the power output in the levels is relatively linear. Therefore, during the test, the research and development and debugging indexes are in the middle of the index range, and the power of the production line is over-limited.
Because when carrying out power debugging in the research and development environment, the line loss (insertion loss) of whole route is a value, and during the line loss has compensated into power debugging, and in the environment of production line, because the radio frequency cable and walk the rationality problem of line, consequently the line loss (insertion loss) can not be unanimous with the line loss (insertion loss) under the research and development environment. During testing, i.e., debugging, the tested product (DUT) itself outputs a power value corresponding to the power level (level), and the output power of the tested product is not debugged according to the insertion loss condition of the radio frequency channel, so that the power overrun condition often occurs.
In practical application, power levels output on different channels of a tested product are reflected in inconsistent and uneven power corresponding to frequency points on the channels due to the fact that jitter or variation may occur in power response of a circuit from a baseband to a radio frequency part, so that power compensation needs to be performed on different channels, and therefore the receiving sensitivity of the tested product needs to be debugged.
Referring to fig. 9, as an embodiment of the received metric debugging, the method includes the following steps:
2041. and a second step of updating the calibration file, namely updating the calibration file at the control server and placing the calibration file in an engineering catalog of the factory test software.
2042. And outputting a second signal, namely judging whether the connection of the test access is correct or not, judging whether the calibration is finished or not, if so, controlling the parameter testing device to transmit a second signal to the tested product at a certain power output value through factory test software, and if not, entering the radio frequency access calibration.
2043. And testing the receiving indexes, namely obtaining the receiving sensitivity by factory test software through signal forwarding equipment, judging whether the receiving sensitivity meets the set requirement, if so, continuously measuring the rest receiving indexes, and otherwise, checking the crimping condition of the shielding box and retesting.
It should be noted that, in the process of receiving index debugging, the factory test software 1011 first determines whether the receiving path (i.e., the testing path) is correctly connected and whether the radio frequency path calibration is completed, and prompts a corresponding result, and after both are satisfied, the factory test software 1011 enters receiving index debugging (testing).
In the above embodiment of the reception index debugging 204, when the reception index is debugged, it is determined that the reception sensitivity meets the set requirement, and then the remaining transmission index is tested, otherwise, the crimping condition of the shielding box 102 is rechecked to ensure that the shielding performance of the shielding box 102 is stable to a certain extent, and on the premise that the shielding performance of the shielding box 102 is determined to be measured to be better, the remaining reception index is measured, so that the tested reception index better meets the actual reception performance of the tested product, and the debugging of the reception index has higher stability.
And after the transmission index debugging is finished, conducting or radiating receiving index debugging is carried out. The reception index generally evaluates reception sensitivity (sensitivity) and packet loss rate (PER), and the key index is reception sensitivity. The receiving sensitivity generally has an overrun phenomenon in the test and verification, and the deterioration of the packet loss rate is mainly related to the insertion loss compensation, the shielding performance of the radio frequency cable and the shielding performance of the shielding box 102.
The shielding performance of the radio frequency cable can meet the requirements of common radio frequency cables. The insertion loss compensation is calibrated by the calibration method of the rf path, and thus the shielding performance of the shielding box 102 needs to be considered. First, the test of the receive sensitivity requires the shielding cage 102 to have a good isolation (e.g., greater than 70 dB) to ensure that the receive sensitivity level is satisfactory. In the cover-closing type shielding box 102, the upper and lower pressing grooves adopt shielding cotton for cover closing shielding, and the cover closing of the shielding box 102 repeatedly accelerates the aging of the shielding cotton and shortens the service life of the shielding box 102, so that the shielding performance is deteriorated with the passage of time. Therefore, the shielding box 102 provided by the application is realized by adopting the copper mesh with higher conductivity and compression resistance, and the shielding box 102 adopting the copper mesh can realize longer service life. Therefore, when the reception sensitivity is good or bad in the reception index debugging (testing), the isolation of the shield box 102 is checked.
The WIFI radio frequency test system and the WIFI radio frequency test method provided by the application provide a test system and a test method for WIFI/BLE products, and can realize rapid test of mass-produced WIFI/BLE products.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a WIFI radio frequency test system which characterized in that: the device comprises a control server (101), a shielding box (102), a parameter testing device (103), an attenuator (104) and a high-frequency probe (62); wherein; wherein,
the input port of the parameter testing device (103) is connected with the output end of the attenuator (104) through a radio frequency cable, and the parameter testing device is used for measuring the emission index of the emission signal of the tested product and outputting a second signal;
the control server (101) is loaded with factory test software (1011) and used for controlling a tested product to output a first signal through the factory test software (1011) and controlling the parameter testing device (103) to output a second signal, and the factory test software (1011) reads a receiving index of the tested product and an emission index measured by the parameter testing device (103);
the input end of the attenuator (104) is connected with the high-frequency probe (62) through a radio frequency cable;
the high-frequency probe (62) is arranged in the shielding box (102) and is used for being connected with an RF head of a product to be tested;
the shielding box (102) is used for bearing a product to be tested;
the transmitting indexes comprise transmitting power, error vector amplitude, frequency offset and a frequency offset template, and the receiving indexes comprise receiving sensitivity and packet loss rate.
2. A WIFI radio frequency test system according to claim 1, characterized by: one side opening (11) setting of shielded cell (102), position department that just is close to opening (11) on shielded cell (102) slides and is provided with chamber door (13) that are used for sheltering from opening (11), be provided with the gliding first driving piece of drive chamber door (13) on shielded cell (102), be provided with tray (2) in shielded cell (102), it is provided with anchor clamps (3) that are used for the centre gripping to be surveyed the product to slide on tray (2), be provided with the gliding second driving piece of length direction along tray (2) of drive anchor clamps (3) on tray (2), be provided with in shielded cell (102) and be used for driving high frequency probe (62) and be close to or keep away from the third driving piece of being surveyed the product.
3. A WIFI radio frequency test system according to claim 2, characterized in that: the third driving piece comprises a third air cylinder (6), a supporting plate (61) is arranged on a piston rod of the third air cylinder (6), and the high-frequency probe (62) is detachably arranged on the supporting plate (61).
4. A WIFI radio frequency test system according to claim 1, characterized by: the test system further comprises a signal forwarding device (105), the signal forwarding device (105) is communicated with the control service end (101) through the Ethernet, the signal forwarding device (105) is communicated with the parameter test device (103) through the Ethernet, a switching serial port line is connected to an output interface of the signal forwarding device (105), and the other end of the switching serial port line is used for being connected with a signal input end of a tested product.
5. A WIFI radio frequency test system according to claim 4, characterized in that: the signal forwarding device (105) includes, but is not limited to, any one of a switch and a multi-port repeater.
6. A WIFI radio frequency test system according to claim 1, characterized by: the test system further comprises an entry device (106), the entry device (106) is in communication connection with the control server (101), and the control server (101) is used for scanning a bar code on the tested product through the entry device (106) to enter information of the tested product.
7. A WIFI radio frequency test method implemented according to any one of the WIFI radio frequency test systems of claims 1 to 6, characterized by: the testing method comprises the following steps of,
the method comprises the following steps of calibrating a radio frequency channel (201), connecting the radio frequency channel composed of a parameter testing device (103), a radio frequency cable and a high-frequency probe (62), and measuring insertion loss values of the radio frequency channel on each frequency point to obtain a calibration file;
the test access wiring (202) is used for connecting the tested product to the radio frequency access and connecting the test access of the tested product according to the wiring mode of the tested product during testing;
the transmission index debugging (203) is used for updating and placing the calibration file into an engineering catalog of factory test software (1011) based on the connected test access to debug the transmission index of the tested product, wherein the transmission index comprises transmission power, error vector amplitude, frequency offset and a frequency offset template; and the number of the first and second groups,
and a received index debugging step (204) of updating and placing the calibration file into an engineering catalog of factory test software (1011) based on the connected test path to debug the received index of the tested product, wherein the received index comprises the receiving sensitivity and the packet loss rate.
8. The WIFI radio frequency test method according to claim 7, wherein: the transmission indicator commissioning (203) comprises the steps of:
a first calibration file updating step (2031) of updating and placing the calibration files in the engineering catalog of the factory test software (1011) at the control server (101);
a step (2032) of transmitting a first signal, which is to judge whether the connection of the test path is correct and whether the calibration is completed, if so, the factory test software (1011) is used to control the tested product to transmit the first signal at a certain power output value, otherwise, the radio frequency path calibration is entered again; and the number of the first and second groups,
and a step (2033) of testing the transmission index, namely checking the measured power value of the first signal on the parameter measuring device, judging whether the loss value between the power output value and the power measured value is consistent with the insertion loss threshold value corresponding to the frequency point, if so, continuing to measure the residual receiving index, and otherwise, re-entering the radio frequency channel calibration.
9. The WIFI radio frequency test method according to claim 7, wherein: the receiving metrics debugging (204) comprises the steps of,
a second calibration file updating step (2041) of updating and placing the calibration files in the engineering catalog of the factory test software (1011) at the control server (101);
a step (2042) of outputting a second signal, which is to judge whether the connection of the test channel is correct or not and judge whether the calibration is completed or not, if so, the factory test software (1011) is used for controlling the parameter testing device (103) to transmit a second signal to the tested product with a certain power output value, otherwise, the radio frequency channel is used for calibration; and the number of the first and second groups,
and a step (2043) of testing the receiving indexes, wherein factory test software (1011) obtains the receiving sensitivity through the signal forwarding equipment (105), judges whether the receiving sensitivity meets the set requirement, if so, continuously measures the residual receiving indexes, and otherwise, checks the crimping condition of the shielding box (102) and tests again.
10. The WIFI radio frequency test method according to claim 7, wherein: the method of testing a via connection (202) includes,
one end of the switching serial port line is connected with an input/output interface of a tested product, and the other end of the switching serial port line is connected with an input/output port of the signal forwarding equipment (105);
one end of the attenuator (104) is connected with the high-frequency probe (62) through a radio frequency cable, and the other end of the attenuator (104) is connected with the output end of the parameter testing device (103) through the radio frequency cable; and the number of the first and second groups,
and starting the third air cylinder (6) to enable the high-frequency probe (62) to be close to and connected with the RF head of the product to be tested.
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