CN107682230B - A WIFI performance and function tester and its testing method - Google Patents

Abstract

The invention relates to a WIFI performance and function tester and a testing method thereof, wherein the tester comprises a circuit board and a main control chip arranged on the circuit board, an RS232 interface and a network port which are used for being connected with an upper computer I, an RF circuit change-over switch II and 1 or more RF circuit change-over switches I, a double-frequency WIFI transceiver chip I which is connected with the main control chip and a double-frequency wireless radio frequency front end which is used for amplifying wireless transmitting signals and receiving signals; the device comprises 1 or more SMA I ports, SMA II ports and SMA III ports, a coupler for coupling the WIFI product signals to be tested received by the SMA I ports, a power divider I, a power divider II, a dual-frequency WIFI transceiver chip II connected with the SMA III ports and the like, and further discloses a method for testing by using the tester; the tester and the testing method can complete related testing of the related WIFI function and performance by one testing station.

Description

A WIFI performance and function tester and its testing method

Technical field

The invention belongs to the field of communication technology, and specifically relates to a WIFI performance and function tester and a test method thereof.

Background technique

In the production process of products involving WIFI functions, the factory tests corresponding test items at different test stations based on WIFI testing needs, such as WIFI transmit power calibration, WIFI static indicators, WIFI performance throughput, and WIFI signal near-field testing. (NFT). This requires changing test stations multiple times. This greatly increases the testing time, labor costs and testing equipment.

Contents of the invention

The object of the present invention is to overcome the shortcomings of the existing technology and provide a WIFI performance and function tester and a test method thereof. The tester and test method of the present invention can be used to complete related tests of the WIFI functions in one test station, such as solving WIFI signal calibration, WIFI static indicators, WIFI performance throughput, and WIFI signal near-field testing effectively reduce test time, test labor costs, and improve production efficiency.

In order to achieve the above objects, the technical solutions adopted by the present invention are as follows:

Technical solution one:

A WIFI performance and function tester, including a circuit board and a main control chip provided on the circuit board, an RS232 interface and a network port provided on the main control chip for connecting to the host computer I, and the The main control chip switches the RF line switch II and one or more RF line switch I through control signals, the dual-frequency WIFI transceiver chip I connected to the main control chip, and the dual-frequency WIFI transceiver chip I One or more connected dual-band wireless radio frequency front-ends for amplifying wireless transmitting and receiving signals; and one or more SMAⅠ ports, SMAⅡ ports, power splitter I, SMAⅢ ports, power splitter II and dual-band WIFI transceiver chip II;

The SMAⅠ port is connected to a coupler for coupling the signal of the WIFI product under test received by the SMAⅠ port. The SMAⅠ port is connected to the input port of the coupler, and the output port of the coupler is switched with the corresponding RF line. The common port of switch I is connected, the coupling port of the coupler is connected to the corresponding branch port on the power splitter I, and the branch A port of the RF line switching switch I is connected to the dual-band wireless radio frequency front end. , the branch B port of the RF line switching switch I is connected to the corresponding branch port on the power splitter II, and the combined port of the power splitter II is connected to the branch A port of the RF line switching switch II. Connected, the combined port of the power splitter I is connected to the branch B port of the RF line switching switch II, and the common port of the RF line switching switch II is connected to the SMA II port;

The SMA III port is connected to the dual-band WIFI transceiver chip II, and the dual-band WIFI transceiver chip II is provided with a USB interface connected to the host computer II.

Further, the main control chip is also connected to a toggle switch that sends RF line switching switch II and RF line switching switch I gear signals to the main control chip.

Further, it also includes DC power supply and DC power switch.

Further, the network port is an Ethernet LAN port; the host computer I and the host computer II are both PCs; the main control chip and the dual-band WIFI transceiver chip I are configured on the main control chip PCIe interface connection on the.

Technical solution two:

A testing method for WIFI performance and function, including the following steps:

Step 1. Insertion loss calibration

Step 1-1. First, switch the RF line switch of the tester so that the branch B port of the RF line switch I and the branch A port of the RF line switch II are open, and then connect the USB interface on the tester to the host computer II. Connect, connect the SMAⅢ port to the antenna cable end of one of the antennas on the WIFI product under test through a radio frequency cable, connect the corresponding SMAⅠ port on the tester to the calibration test antenna through a radio frequency cable, and connect the antenna on the WIFI product under test to the calibration test antenna. The calibration test antenna is connected through antenna near-field coupling; finally, the SMA II port is connected to the test signal receiving interface of the WIFI static parameter analyzer through a radio frequency line;

Step 1-2, when the host computer II recognizes the calibration system of the tester, the host computer II controls the transmit power of the antenna on the WIFI product to be tested, and sets the transmit power, bandwidth, modulation mode, and transmission rate of the calibration system, as described The transmission power of the SMAIII port is 0dBm. The antenna transmission power is transmitted through the SMAⅢ port and reaches the antenna cable end of the antenna on the WIFI product under test through the radio frequency line, which is point A. The antenna on the WIFI product under test couples the radio frequency signal through the antenna near field. Couple the received signal to the calibration test antenna, and then couple it to the corresponding SMAⅠ port through the calibration test antenna, and then pass through the RF line switch I, power splitter II, and RF line switch II inside the tester in order to reach the SMAⅡ port , transmit the signal to the test signal receiving interface of the WIFI static parameter analyzer through the radio frequency line, that is, point B, and then the WIFI static parameter analyzer measures the power X, X=0dBm-Loss(RFcable 1)–Loss(A to B );

0dBm: SMAIII port transmit power; Loss (RFcable 1): Insertion loss of the radio frequency line connected to the SMAⅢ port; Loss (A to B): From the antenna cable end of the antenna on the WIFI product under test, that is, point A to the WIFI static parameter analyzer The test signal receiving interface is the insertion loss on the path at point B;

Step 1-3, first disconnect the static parameter analyzer from the SMAⅡ port, and then remove the RF line connected to the corresponding SMAⅠ port on the tester, that is, point C, from the SMAI port and connect it to the static parameter analyzer. On the test signal receiving port of the tester, when the host computer II recognizes the calibration system of the tester, it controls the transmit power of the antenna on the WIFI product under test through the host computer II, and sets the transmit power, bandwidth, modulation mode, and transmit rate of the calibration system. , the transmitting power of the SMAIII port is 0dBm, the antenna transmitting power is transmitted through the SMAIII port, and reaches the antenna cable end of the antenna on the WIFI product under test through the radio frequency line, that is, point A. The antenna on the WIFI product under test couples the radio frequency through the antenna near field The signal mode couples the received signal to the calibration test antenna, and couples it to the test signal receiving interface of the static parameter analyzer through the calibration test antenna. The power Z is measured by the WIFI static parameter analyzer, Z=0dBm-Loss (A to C), it is concluded that Loss(A to C)=-ZdBm;

Among them, Loss (A to C) is the insertion loss on the path between the antenna cable end of the antenna on the WIFI product under test, which is point A, and the SMAI port, which is point C;

Step 1-4, disconnect the SMAⅢ port from the WIFI product under test, the WIFI product under test and the calibration test antenna, and the calibration test antenna and the WIFI static parameter analyzer, and then directly connect the SMAⅢ port to the WIFI through the radio frequency cable Static parameter analyzer, set the transmit power of the SMAIII port to 0dBm, reach the test signal receiving interface of the WIFI static parameter analyzer through the radio frequency line, and then measure the power Y by the WIFI static parameter analyzer, Y=0dBm-Loss (RFcable 2 ); among them, Loss(RFcable 2)=Loss(RFcable 1);

Then the insertion loss of the antenna on the WIFI product to be tested along the entire antenna path is: Loss(Path)=Y-X=0dBm-Loss(RFcable2)-[0dBm-Loss(RFcable1)-Loss(A to B)]=Loss (A to B);

Step 1-5, follow the methods described in steps 1-1 to 1-4 to measure the insertion loss of other antennas on the WIFI product to be tested, and compensate the Loss (Path) value of each antenna to the WIFI static parameter analysis After the instrument is installed, the calibration test of all antennas on the WIFI product under test is completed, and finally the tester is disconnected from the host computer II and the WIFI product under test;

Step 2. RF link transmit power calibration of WIFI products and WIFI static parameter testing

Step 2-1, after compensating the Loss (Path) in the WIFI static parameter analyzer, first place the WIFI product to be tested and the tester in the shielding box, and connect the WIFI product to be tested to the Ethernet network card I of the host computer III , connect the antenna of the WIFI product under test to the calibration test antenna through the antenna near-field coupling signal. The calibration test antenna is connected to the corresponding SMAⅠ port on the tester through a radio frequency cable. Connect the host computer I to the tester through a serial port connection cable. Connect the RS232 interface, connect the host computer I to the network port of the tester through a network cable, connect the SMA II port of the tester to the WIFI static parameter analyzer through a radio frequency cable; connect the network port of the WIFI static parameter analyzer to the host computer through a network cable III is connected to the Ethernet network card II.

Step 2-2: First, you need to calibrate the transmit power of each antenna link of the WIFI product under test, set the calibration target power PT, and then switch the RF line switch through the host computer I to make the branch B port of the RF line switch I and The branch A port of the RF line switch II is open, and then the WIFI product under test is controlled through the host computer III. First, set the transmit power parameter H0 (Index). The transmit RF signal power corresponding to H0 (Index) is Px0. The RF signal is coupled to the RF signal in the near field through the antenna, and enters the interior of the tester through the SMAⅠ port. It passes through the coupler, RF line switch I, power splitter II, and then enters the RF line switch II, and finally passes through the SMA II port. Receive or transmit the signal to the WIFI static parameter analyzer; the WIFI static parameter analyzer compensates the insertion loss Loss (path) on the entire measurement link measured in step 1 to the received RF signal, and the result is Measure the power Px0 emitted by the antenna on the WIFI product, and then the WIFI static parameter analyzer feeds back the power Px0 to the host computer III through the network port. The host computer III compares Px0 with the target power PT, and sets it by the dichotomy method The second transmission power parameter H1 (Index), at this time, the corresponding second transmission power is Px1, which is sent to the WIFI static parameter analyzer, the power Px2 is measured, and fed back to the host computer III21 for comparison with PT; keep repeating This step continues until the power emitted by the WIFI product under test is the same as the target power PT. At this time, the transmission power parameter Hn (Index) corresponding to the target power is obtained. The host computer III writes the transmission power parameter Hn (Index) into the WIFI through the network port. In the product, the transmit power calibration of the antenna on the WIFI product to be tested is completed;

Step 2-3, first, switch the RF line switch through the host computer I so that the branch B port of the RF line switch I and the branch A port of the RF line switch II are open, and then control the emission of the WIFI product under test through the host computer III Or receive radio frequency signals. The transmitted or received radio frequency signals reach the calibration test antenna through the antenna near-field coupling radio frequency signal, and enter the interior of the tester through the SMAⅠ port, and pass through the coupler, RF line switch I, and power splitter II in sequence. Then enter the RF line switch II, and finally receive or transmit the signal to the WIFI static parameter analyzer through the SMA II port; that is, the WIFI static parameter test of the antenna on the WIFI product to be tested is completed;

Step 2-4, switch to other antennas in sequence, and perform transmit power calibration and WIFI static parameter testing according to the methods described in steps 2-2 and 2-3, until the WIFI calibration of all antennas on the WIFI product to be tested is completed. Transmit power calibration and static parameter testing;

Step 3. WIFI Tx static parameter test under dynamic throughput

Step 3-1. First, the WIFI product under test and the tester are both in the shielding box. The host computer III issues a control command to the WIFI product under test so that only one antenna on the WIFI product under test is turned on; set the tester Set to the adaptive mode, the host computer I sends a control command to the tester to switch the RF line switch so that the branch B port of the RF line switch II connected to the antenna opened on the WIFI product under test is switched to the RF line. The branch A port of switch I is open, and the branch B port and SMA I port of the RF line switching switch II are kept open. Then the host computer I searches for the SSID broadcast by the WIFI product under test through the tester. After searching, it uses the antenna coupling method. Make a connection to establish a path for data from the host computer I to the tester, then to the calibration test antenna, and then connect to the WIFI product under test through near-field coupling, and finally to the host computer III;

Step 3-2: After completing the connection described in step 3-1, complete the control of the data flow direction through the host computer I and host computer III respectively, and set the WIFI product under test to the data uplink throughput test, that is, transmit The signal emitted by the antenna of the WIFI product under test is transmitted to the calibration test antenna through near-field coupling, and enters the inside of the tester through the SMAⅠ port. The radio frequency signal passes through the coupler and is coupled by the coupler. The port is sent to the branch port corresponding to the power splitter I, and then sent to the WIFI static parameter analyzer through the SMA II port through the combined port of the power splitter I and the branch B port of the RF line switch II to complete the WIFI under test WIFI Tx static parameter test under dynamic throughput of the antenna on the product;

Step 3-3: Switch to other antennas in sequence, and conduct tests according to the methods described in steps 3-1 and 3-2, until the WIFI Tx static parameter test under dynamic throughput of all antennas on the WIFI product to be tested Finish;

Step 4. NFT test

Step 4-1. After disconnecting the WIFI static parameter analyzer and the host computer III, place the WIFI product under test and the tester in the shielding box. Connect the WIFI product under test to the Ethernet network card of the host computer III through a network cable. To connect, connect the antenna of the WIFI product under test to the calibration test antenna through the antenna near-field coupling signal. The calibration test antenna is connected to the corresponding SMAⅠ port on the tester through a radio frequency cable. Connect the host computer I to the PC through the serial port connection cable. Connect the RS232 interface of the tester, connect the host computer I to the network port of the tester through a network cable, and connect the SMA II port of the tester to the WIFI static parameter analyzer through a radio frequency cable;

Step 4-2. The host computer III issues a control command to the WIFI product under test, so that only one antenna on the WIFI product under test is in the open state, and the other antennas are all in the closed state. The inside of the tester is in contact with the open antenna. The connected SMAⅠ port, coupler, RF line switch I, and dual-band wireless radio frequency front-end are also in the open state, while the SMAⅠ port, coupler, RF line switch I, dual-band connected to several other closed antennas The radio frequency front ends are also turned off;

Step 4-3. Use the host computer I to switch the RF line switch so that the branch A port of the RF line switch I connected to the opened antenna is in the open state, while the RF line switch II is in the closed state;

Step 4-4: Control the working status of the WIFI product under test through the host computer III, and the tester adapts to the connection rate and status of the WIFI product under test. Then the host computer I searches for the SSID broadcast by the WIFI product under test through the tester. After arriving, the connection is made through antenna coupling. After the connection, the transmission signal of the WIFI product under test is coupled through the antenna and enters the inside of the tester through the SMAⅠ port. It passes through the coupler, RF line switch I, and dual-band wireless radio in sequence. After the front end, the dual-band WIFI transceiver chip I sends it to the main control chip, and the host computer I reads the transmission signal of the WIFI product under test through the RS232 interface to obtain the intensity RSSI of the transmission signal;

Near field signal strength: NFTSSI=RSSI-Loss(A to C)-IL(internal);

Among them, Loss (A to C) is the insertion loss on the path between the antenna cable end of the antenna on the WIFI product under test, that is, point A and the SMAI port, that is, point C, measured in step 1; IL (internal) is the inside of the tester The insertion loss on the receiving connection from the SMAⅠ port to the coupler to the RF line switch I and then to the dual-band wireless radio frequency front-end; thereby completing the NFT test of the antenna on the WIFI product to be tested, and then conducting the antenna with the antenna The connected SMAⅠ port, coupler, RF line switch I, and dual-band wireless radio frequency front end are closed;

Step 4-5: Turn on other antennas and the SMA I port connected to the corresponding antenna, the coupler, the RF line switch I, the dual-band wireless radio frequency front end, and follow steps 4-2 to 4-4. Method: Perform NFT testing until all antennas of the WIFI product to be tested complete the NFT testing;

Step five, throughput test

Step 5-1. First, the WIFI product under test and the tester are both in the shielding box. The host computer III is connected to the WIFI product under test through the Ethernet network port. The host computer III issues control commands to the WIFI product under test and sets the WIFI product under test. All antennas of the tested WIFI products are in the open state; issue control commands to the tester through the host computer I, test and calibrate the antennas, as well as the tester's SMAⅠ port, coupler, RF line switch I, and dual-band wireless radio frequency front-end settings is in the open state, and the tester is set to the adaptive mode, and then the host computer searches for the SSID broadcast by the WIFI product under test through the tester. After searching, it connects through the antenna coupling, thereby establishing the data transmission from the host computer. I to the tester, then to the calibration test antenna, then connected to the WIFI product under test through near-field coupling, and finally to the host computer III;

Step 5-2: After completing the connection in step 5-1, complete the control of the data flow direction through the host computer I and host computer III respectively, and complete the test of the data uplink throughput and data downlink throughput of the WIFI product to be tested, disconnect Just open the connection between the tester, the host computer I and the WIFI product to be tested.

Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

The invention improves the tedious operation of changing different test stations for test items of different WIFI functions during the production process of WIFI products. It completes all test items in one stop and one set of test environments, saving test time and setting up tests. environment time, effectively reducing production costs. And on the basis of improving production efficiency, some convenient debugging methods have been added - measuring the static parameters of the test prototype under dynamic throughput. Reduces the difficulty of static parameter testing of prototypes in non-test mode.

Description of the drawings

Figure 1 is a system structure diagram of the tester of the present invention;

Figure 2 is a system structure diagram when measuring power X in the calibration method of the present invention;

Figure 3 is a signal transmission diagram when measuring power X in the calibration method of the present invention;

Figure 4 is a system structure diagram when measuring power Z in the calibration method of the present invention;

Figure 5 is a signal transmission diagram when measuring power Z in the calibration method of the present invention;

Figure 6 is a system structure diagram when measuring power Y in the calibration method of the present invention;

Figure 7 is a signal transmission diagram when measuring power Y in the calibration method of the present invention;

Figure 8 is a system structure diagram when the present invention performs transmit power calibration and static parameter testing as well as WIFI Tx static parameter testing under dynamic throughput;

Figure 9 is a signal transmission diagram when transmitting power calibration and static parameter testing according to the present invention;

Figure 10 is a signal transmission diagram when the present invention performs WIFI Tx static parameter testing under dynamic throughput;

Figure 11 is a system structure diagram when testing the throughput and NFT of the present invention;

Figure 12 is a signal transmission diagram when testing NFT according to the present invention;

Figure 13 is a signal transmission diagram during the throughput test of the present invention.

Detailed ways

The present invention will be described in further detail below with reference to examples.

As shown in Figure 1, an embodiment of a WIFI performance and function tester of the present invention includes a circuit board, a main control chip 2 provided on the circuit board, and a main control chip 2 provided on the main control chip 2 for communicating with the host. The RS232 interface 4 and network port 5 connected to the machine I22, the RF line switching switch II13 and one or more RF line switching switches I8 that are switched by the main control chip 2 through the control signal, and the main control chip 2 A connected dual-band WIFI transceiver chip I3, and one or more dual-band wireless radio frequency front-ends 7 (dual-bandWIFI FEM) for amplifying wireless transmission signals and receiving signals connected to the dual-band WIFI transceiver chip I3; and 1 One or more SMA I ports 10, SMA II ports 11, SMA III ports 12, power splitter I 14, power splitter II 15 and dual-band WIFI transceiver chip II 16;

The SMAⅠ port 10 is connected to a coupler 9 for coupling the signal of the WIFI product 19 under test received by the SMAⅠ port 10. The SMAⅠ port 10 is connected to the input port of the coupler 9, and the output port of the coupler 9 Connected to the common port of the corresponding RF line switching switch I8, the coupling port of the coupler 9 is connected to the corresponding branch port on the power splitter I14, and the branch A port of the RF line switching switch I8 is connected to The dual-band wireless radio frequency front end 7 is connected, the branch B port of the RF line switching switch I8 is connected to the corresponding branch port on the power splitter II15, and the combined port of the power splitter II15 is connected to the The branch A port of the RF line switching switch II13 is connected, the combined port of the power splitter I14 is connected with the branch B port of the RF line switching switch II13, and the common port of the RF line switching switch II13 is connected with the SMA II port. 11 connected;

The SMA III port 12 is connected to the built-in dual-band wireless radio frequency front end of the dual-band WIFI transceiver chip II16. The dual-band WIFI transceiver chip II16 is provided with a USB interface 17 connected to the host computer II18.

The main control chip 2 in the present invention is a main control CPU with network functions. It integrates an RS232 interface 4 for control and debugging, and can be connected to the host computer I22; it can control the RF line switching switch through the host computer I22. Switch between I8 and the branch port of RF line switch II13, thereby changing the signal transmission path in the tester 1 for different test items. When the branch A port of RF line switch I8 is unblocked, the branch port of RF line switch II13 When the A port and the branch B port are both closed, it is a mode 1 transmission path, and the throughput test and NFT test can be performed; when the branch B port of the RF line switch I8 and the branch A port of the RF line switch II13 remain open When the SMAⅠ port and the branch B port of the RF line switch II13 are both open, it is the Mode 3 transmission path. In addition, the branch A port of the RF line switching switch I8 is also required to be in an open state. At this time, the WIFI Tx static parameter test under dynamic throughput can be carried out; in the present invention, the main control chip 2 is connected to the dual-frequency WIFI transceiver chip through a relevant interface. Ⅰ3, forward and send the wireless terminal’s transceiver data through the network port 5, and analyze the strength of the received signal to achieve the purpose of throughput test and NFT test; the main function of the dual-band WIFI transceiver chip of the present invention is to The signal and the baseband signal are converted, and then the data is sent and received through the main control chip 2 to achieve the purpose of throughput testing, and the dual-band WIFI transceiver chip can realize dual-band testing of 2.4G and 5G WIFI. Among them, the dual-band WIFI transceiver chip I3 is used for testing in throughput and NFT modes. The dual-band WIFI transceiver chip II16 is used in loss calibration and loss compensation modes. Dual-band WIFI transceiver chip I3 and dual-band WIFI transceiver chip II16 are completely independent systems. The dual-frequency WIFI transceiver chip II16 of the present invention is connected to the host computer II18 through the USB interface 17, is directly controlled by the host computer II18, and transmits power through the SMA III port 12 for the purpose of calibrating loss; in addition, the dual-frequency WIFI transceiver chip II16 can also be connected through the host computer II18. The machine II 18 switches the working rate, bandwidth, modulation mode, working frequency band, and output power to meet the loss calibration requirements under different circumstances; the dual-band wireless radio frequency front-end 7 of the present invention: the purpose of this chip is to amplify wireless transmitting signals and receiving signals. The 2.4G and 5G WIFI working signals can be switched through the dual-frequency WIFI transceiver chip I3. In addition, it can also be used for switching, switching between the receiving and transmitting states and the switching of the dual-frequency WIFI frequency band; the RF line switching switch of the present invention is used through the main switch. The control chip 2 switches the branch port to switch the path of the radio frequency signal to achieve switching under different mode transmission paths. The coupler 9 of the present invention couples the signal of the WIFI product 19 to be tested received by the tester 1 from the antenna end, and analyzes the signal to be tested under the dynamic throughput test through the static parameter analysis device (external device) connected to the SMA III port 12. Measure the static parameters (EVM, Spectrum Mask, frequency offset, transmission power) of the transmitted signal of the WIFI product 19; the power divider of the present invention integrates the signals to be tested received by several antennas into one, and then connects the static analysis equipment to analyze several antennas respectively. Multiple antennas are tested at the same time, and insertion loss calibration, RF link transmit power calibration of WIFI products and WIFI static parameter testing, WIFI Tx static parameter testing under dynamic throughput and NFT testing are not conducted simultaneously on multiple antennas. Instead, only one antenna can be tested at the same time, that is, one antenna needs to be tested before the next antenna is tested. Only the throughput test can be used to test either single antenna or multiple antennas. The SMAⅠ port 10 of the present invention is connected to the calibration test antenna 24 through a radio frequency line. The calibration test antenna 24 is connected to the antenna of the WIFI product 19 to be tested through antenna near-field coupling. The SMAⅡ port 11 is used to connect to the test equipment; the SMAⅢ port 12 Used to connect to the antenna of test equipment or WIFI product 19 under test.

Further, the main control chip 2, RS232 interface 4, network port 5, RF line switching switch II 13, one or more RF line switching switches I8, dual-band WIFI transceiver chip I3, dual-band wireless radio frequency front end 7, SMA I port 10, SMA II port 11, SMA III port 12, power splitter I 14, power splitter II 15, dual-band WIFI transceiver chip II 16, and USB interface are all integrated on the circuit board.

Further, the main control chip 2 is also connected to a toggle switch 6 that sends an RF line switch gear signal to the main control chip 2; when the toggle switch 6 is toggled to make the toggle switch 6 be in a different gear. (Different gears, the connection status of branch A port and branch B port on RF line switch II13 and RF line switch I8 are different). Toggle switch 6 to change the RF line switch gear signal (i.e. RF line switch The connection status information of the branch port of II13 and RF line switch I) is sent to the main control chip 2. Then, after receiving the gear signal sent by the toggle switch 6, the main control chip 2 controls the RF line switch II13 and I through the control signal. The RF line switching switch I8 closes or opens the branch A port and the branch B port, thereby realizing switching between different modes of transmission paths.

Further, it also includes DC power supply and DC power switch. The DC power supply of the present invention supplies power to the entire test instrument.

Further, the network port 5 is an Ethernet LAN port; the upper computer I22 and the upper computer II18 are both PCs; the main control chip 2 and the dual-band WIFI transceiver chip I3 are configured on the main control chip 2. Connect to the PCIE interface on control chip 2.

Further, the test equipment is a WIFI static parameter analyzer 20.

As shown in Figure 2-13, an embodiment of a method for testing WIFI performance and function using the above tester 1 (in this embodiment, which WIFI product to be tested is equipped with a total of 4 antennas, and the SMAⅠ port 10, coupler 9, RF line switching switch Ⅰ8, and dual-band wireless radio frequency front end 7 are also 4 channels), including the following steps:

Step 1. Insertion Loss Calibration (Purpose of Loss Calibration: In the static parameter and transmit power calibration test project, it is necessary to test the transmit power of the WIFI product 19 under test. During the test, the transmit signal of the WIFI product 19 under test will pass through the antenna. , the high-frequency lines connected between tester 1 and these connections or coupling methods will have a certain insertion loss, which will cause the measurement power of the static parameter analysis instrument to be low, so the insertion loss during this path needs to be Measure it and compensate it into the static parameter analysis instrument, so that the accurate transmit power can be measured.)

Step 1-1. First switch the RF line switch of tester 1 so that the branch B port of RF line switch I8 and the branch A port of RF line switch II13 are open. Then, as shown in Figure 2, switch the tester 1 The USB interface 17 on the tester 1 is connected to the host computer II 18. Connect the SMA III port 12 to the antenna cable end of one of the antennas on the WIFI product 19 to be tested through the radio frequency line. Connect the corresponding SMA I port 10 on the tester 1 to the calibration test through the radio frequency line. The antenna 24 (the calibration test antenna 24 is a dual-frequency dipole antenna for WIFI) is connected, and the antenna on the WIFI product 19 to be tested is connected to the calibration test antenna 24 through antenna near-field coupling; Finally, connect the SMA II port 11 to the test signal receiving interface of the WIFI static parameter analyzer 20 through a radio frequency line;

Step 1-2, when the host computer II18 recognizes the calibration system of the tester 1, the host computer II18 controls the antenna transmission power of the WIFI product to be tested, and sets the transmission power, bandwidth, modulation mode, and transmission rate of the calibration system, such as As shown in Figure 3, the transmit power of the SMAIII port 12 is 0dBm, and the antenna transmit power is transmitted through the SMA III port 12, and reaches the antenna cable end of the antenna on the WIFI product 19 to be tested, that is, point A, the WIFI product 19 to be tested. The upper antenna couples the received signal to the calibration test antenna 24 through the antenna near-field coupling radio frequency signal, and couples the signal to the corresponding SMAⅠ port 10 through the calibration test antenna 24, and then passes through the RF line switch inside the tester 1 in turn Ⅰ8, power splitter Ⅱ15, and RF line switching switch Ⅱ13 reach the SMAⅡ port 11, and transmit the signal to the test signal receiving interface of the WIFI static parameter analyzer 20 through the RF line, that is, point B, and then the signal is measured by the WIFI static parameter analyzer 20 Power X, X=0dBm-Loss(RFcable 1)–Loss(A to B);

0dBm: Transmit power of SMAIII port 12; Loss (RFcable 1): Insertion loss of the radio frequency line connected to SMAIII port 12; Loss (A to B): From the antenna cable end of the antenna on the WIFI product 19 under test, that is, point A to the WIFI static The insertion loss on the path of the test signal receiving interface of the parameter analyzer 20, that is, point B;

Step 1-3, first disconnect the static parameter analyzer 20 from the SMA II port 11, and then, as shown in Figure 4, connect the radio frequency line corresponding to the SMA I port 10 on the tester 1, that is, point C, from the SMAI port. After the WIFI product 10 is removed, it is connected to the test signal receiving port of the static parameter analyzer 20. When the host computer II 18 recognizes the calibration system of the tester 1, the host computer II 18 controls the antenna transmit power of the WIFI product 19 to be tested, and sets Determine the transmission power, bandwidth, modulation mode and transmission rate of the calibration system, as shown in Figure 5. The transmission power of the SMAIII port 12 is 0dBm. The antenna transmission power is transmitted through the SMAIII port 12 and reaches the WIFI product to be tested through the radio frequency line 19 At the antenna cable end of the upper antenna, that is, point A, the antenna on the WIFI product 19 to be tested couples the received signal to the calibration test antenna 24 through the antenna near-field coupling radio frequency signal, and couples it to the static parameter analysis through the calibration test antenna 24 The test signal receiving interface of the instrument 20, the power Z is measured by the WIFI static parameter analyzer 20, Z=0dBm-Loss(A to C), it is concluded that Loss(A to C)=-ZdBm;

Among them, Loss (A to C) is the insertion loss on the path between the antenna cable end of the antenna on the WIFI product 19 under test, which is point A, and the SMAI port 10, which is point C;

Steps 1-4: Disconnect the SMA III port 12 and the WIFI product under test 19, the WIFI product under test 19 and the calibration test antenna 24, and the calibration test antenna 24 and the WIFI static parameter analyzer 20, and then proceed as shown in Figure 6 As shown in Figure 7, connect the SMA III port 12 directly to the WIFI static parameter analyzer 20 through the radio frequency line. As shown in Figure 7, set the transmit power of the SMA III port 12 to 0dBm and receive the test signal that reaches the WIFI static parameter analyzer 20 through the radio frequency line. interface, and then measure the power Y by the WIFI static parameter analyzer 20, Y=0dBm-Loss (RFcable 2); connect the radio frequency line between the SMAⅢ port 12 and the WIFI static parameter analyzer 20 and the SMAⅢ connected in step 1-2 Port 12 has the same radio frequency line as the antenna on the WIFI product, therefore, Loss(RFcable 2)=Loss(RFcable 1);

Then the insertion loss of the antenna on the WIFI product 19 under test along the entire antenna path is: Loss (Path) = Y-X = 0dBm-Loss (RFcable2) - [0dBm-Loss (RFcable1) - Loss (A to B)] = Loss(A to B);

Steps 1-5, follow the methods described in steps 1-1 to 1-4 to measure the insertion loss Loss of other antennas on the WIFI product 19 to be tested, and compensate the Loss (Path) value of each antenna to the WIFI static After the parameter analyzer 20 is connected, the calibration test of all antennas on the WIFI product 19 to be tested is completed, and finally the connection between the tester 1 and the host computer II 18 and the WIFI product 19 to be tested is disconnected;

Step 2. RF link transmit power calibration of WIFI products and WIFI static parameter testing

Step 2-1, after compensating the Loss (Path) in the WIFI static parameter analyzer 20, first, as shown in Figure 8, place the WIFI product 19 under test and the tester 1 in the shielding box 23, and place the WIFI product under test 19 in the shielding box 23. 19 is connected to the Ethernet network card I of the host computer III 21 through a network cable (PC is used in this embodiment), and the antenna of the WIFI product 19 to be tested is connected to the calibration test antenna 24 through the antenna near-field coupling signal, and the calibration test antenna 24 is connected to the test antenna 24. The corresponding SMAⅠ port 10 on instrument 1 is connected through a radio frequency cable. Connect the host computer I22 to the RS232 interface 4 of tester 1 through the serial port cable. Connect the host computer I22 to the network port 5 of tester 1 through a network cable. Put the test The SMAⅡ port 11 of the instrument 1 is connected to the WIFI static parameter analyzer 20 through a radio frequency cable; the network port of the WIFI static parameter analyzer 20 is connected to the Ethernet network card II of the host computer III21 through a network cable.

Step 2-2, firstly, it is necessary to calibrate the transmit power of each antenna link of the WIFI product 19 to be tested, set the calibration target power PT, and then switch the RF line switch through the host computer I22 to the branch B port of the RF line switch I8 The branch A port of the RF line switch II13 is open, and the WIFI product 19 under test is controlled through the host computer III21. Since the WIFI product 19 is in an uncalibrated state at this time, the power emitted by the WIFI product 19 under test is unknown. Therefore, first set the transmit power parameter H0 (Index), and the transmitted RF signal power corresponding to H0 (Index) is Px0 (dBm). The transmitted RF signal passes through the antenna near-field coupling RF signal, and enters the test through SMAⅠ port 10 Inside the instrument, it passes through the coupler, RF line switch I8, power splitter II15 and then enters the RF line switch II13. Finally, the signal is received or transmitted to the WIFI static parameter analyzer 20 through the SMA II port 11; WIFI static parameter analysis The instrument 20 compensates the insertion loss Loss (path) measured in step 1 on the entire measurement link to the received radio frequency signal, and obtains the power Px0 emitted by the antenna on the WIFI product under test. At this time, Px0 For known power, the WIFI static parameter analyzer 20 feeds back the power Px0 to the host computer III21 through the network port. The host computer III21 compares Px0 with the target power PT, and sets the second transmission power parameter H1 ( Index), at this time, the corresponding second transmission power is Px1, which is sent to the WIFI static parameter analyzer 20, the power Px2 is measured, and fed back to the host computer III21 for comparison with PT; this step is repeated until the WIFI product to be tested The transmitted power of 19 is the same as the target power Pt. At this time, the transmit power parameter Hn (Index) corresponding to the target power is obtained. The host computer III21 writes the transmit power parameter Hn (Index) into the WIFI product 19 through the network port, which is completed. Calibrated the transmit power of the antenna on the WIFI product 19 under test;

Step 2-3, switch the RF line switch through the host computer I22 so that the branch B port of the RF line switch I8 and the branch A port of the RF line switch II13 are open, and then controlled by the host computer III21 (PC is used in this embodiment) The WIFI product 19 under test transmits or receives radio frequency signals. As shown in Figure 9, the transmitted or received radio frequency signals reach the calibration test antenna 24 through the antenna near-field coupling of radio frequency signals, and enter the inside of the tester 1 through the SMAⅠ port 10. Pass through the coupler 9, RF line switch I8, power divider II 15 and then enter the RF line switch II 13, and finally receive or transmit the signal to the WIFI static parameter analyzer 20 through the SMA II port 11; that is, the WIFI product to be tested is completed 19 Wi-Fi static parameter test of this antenna;

Step 2-4, switch to other antennas in sequence, and perform transmit power calibration and WIFI static parameter testing according to the methods described in steps 2-2 and 2-3, until all antennas on the WIFI product 19 under test are completed. WIFI transmit power calibration and static parameter testing;

Step 3. WIFI Tx static parameter test under dynamic throughput (WIFI transmitter static parameter test under dynamic throughput)

Step 3-1. First, the WIFI product 19 to be tested and the tester 1 are both in the shielding box. The host computer III 21 (PC is used in this embodiment) issues a control command to the WIFI product 19 to be tested, so that the WIFI product 19 to be tested is Only one antenna is open; set the tester 1 to the adaptive mode, the host computer I22 issues a control command to the tester 1, and switches the RF line switch so that the antenna on the tester 1 is consistent with the antenna opened on the WIFI product 19 to be tested. The branch B port of the connected RF line switch II13 and the branch A port of the RF line switch I8 are open. Keep the branch B port of the RF line switch II13 and the SMA I port 10 unblocked. Then, as shown in Figure 10, the host computer I22 searches for the SSID broadcast by the WIFI product 19 under test through the tester. After searching, it connects through antenna coupling, thereby establishing data from the host computer I22 to the tester 1, then to the calibration test antenna 24, and then through the near field The coupling method is connected to the WIFI product 19 under test, and finally to the path of the host computer III21;

Step 3-2: After completing the connection described in step 3-1, complete the control of the data flow direction through the host computer I22 and the host computer III21 respectively, and set the WIFI product under test 19 to the data uplink throughput test, that is, The signal emitted by the antenna of the WIFI product 19 under test is transmitted to the calibration test antenna 24 through near-field coupling, and enters the inside of the tester 1 through the SMA I port 10. The radio frequency signal passes through the coupler 9 and passes through The coupling port of the coupler 9 is sent to the corresponding branch port of the power splitter I14, and then sent to the WIFI static signal through the SMA II port 11 through the combiner port of the power splitter I14 and the branch B port of the RF line switching switch II13. The parameter analyzer 20 completes the WIFI Tx static parameter test under the dynamic throughput of the antenna on the WIFI product 19 to be tested;

Step 3-3. Switch to other antennas in sequence, and conduct tests according to the methods described in steps 3-1 and 3-2, until the WIFI Tx static parameters under the dynamic throughput of all antennas on the WIFI product 19 to be tested are Finished test;

Step 4. NFT test (NFT near field test): The factory tests the assembled WIFI prototype to determine whether the WIFI radio frequency link is assembled normally; usually the RF signal is coupled to the test antenna through the antenna of the prototype to be tested and received through the test antenna. The signal strength obtained is used to determine whether the assembly is normal; the so-called near field means that the antenna of the prototype under test and the test antenna couple signals through the near field of the antenna.)

Step 4-1. After disconnecting the WIFI static parameter analyzer 20 and the host computer III21, as shown in Figure 11, the WIFI product 19 under test and the tester 1 are placed in the shielding box 23, and the WIFI under test 19 is placed in the shielding box 23. The product 19 is connected to the Ethernet network card of the host computer III 21 (PC is used in this embodiment) through a network cable. The antenna of the WIFI product 19 to be tested is connected to the calibration test antenna 24 through the antenna near-field coupling signal. The calibration test antenna 24 is connected to the test antenna 24. The corresponding SMAⅠ port 10 on instrument 1 is connected through a radio frequency cable. Connect the host computer I22 to the RS232 interface 4 of tester 1 through the serial port cable. Connect the host computer I22 to the network port 5 of tester 1 through a network cable. Put the test The SMAⅡ port 11 of the instrument 1 is connected to the WIFI static parameter analyzer 20 through a radio frequency line;

Step 4-2. The host computer III21 issues a control command to the WIFI product 19 under test, so that only one antenna on the WIFI product 19 under test is in the open state, the other antennas are all in the closed state, and the tester 1 internally and this channel are open The SMAⅠ port 10, coupler 9, RF line switch I8, and dual-band wireless radio frequency front-end 7 connected to the antenna are also in the open state, while the SMAⅠ port 10, coupler 9, and several other closed antennas are connected. The RF line switching switch I8 and the dual-band wireless radio frequency front end 7 are also in a closed state;

Step 4-3. Use the host computer I22 to switch the RF line switch so that the branch A port of the RF line switch I8 connected to the opened antenna is in the open state, while the RF line switch II13 is in the closed state to avoid coupling of radio frequency signals. Device 9 is coupled to SMAII port 11 and radiates out, affecting the test;

Step 4-4: Control the working status of the WIFI product 19 under test through the host computer III21 (PC is used in this embodiment), and the tester 1 adapts to the connection rate and status of the WIFI product 19 under test, and then the host computer I22 passes the tester 1 Search for the SSID broadcast by the WIFI product 19 under test. After searching, connect through antenna coupling. As shown in Figure 12, the transmit signal of the WIFI product 19 under test is coupled through the antenna and enters the tester 1 through the SMAⅠ port 10. Inside, it passes through the coupler 9, RF line switch I8, and dual-band wireless radio frequency front-end 7 in sequence, and then is sent to the main control chip 2 by the dual-band WIFI transceiver chip I3, and is read by the host computer I22 through the RS232 interface 4 to read the WIFI under test. Product 19’s emission signal, obtain the intensity RSSI of the emission signal;

Near field signal strength: NFTSSI=RSSI-Loss(A to C)-IL(internal);

Among them, Loss (A to C) is the insertion loss on the path between the antenna cable end of the antenna on the WIFI product 19 under test, that is, point A, and the SMAI port 10, or point C, measured in step 1; IL (internal) is the test Insertion loss on the receiving connection from the SMAⅠ port 10 inside the instrument 1 to the coupler 9 to the RF line switch I8 and then to the dual-band wireless radio frequency front-end 7; IL (internal) was measured when the tester was designed, and the same batch of tests This value is a fixed value and cannot be measured during the performance and functional testing of the WIFI product to be tested. However, in the NFT test of the WIFI product to be tested, when calculating the near-field signal strength, you only need to directly subtract IL (internal ) is a fixed value; in addition, the attenuation (i.e. IL (internal)) on the receiving connection from the internal SMAⅠ port 10 of the tester 1 to the coupler 9 to the RF line switch I8 and then to the dual-band wireless radio frequency front-end 7 is relatively small. is small and has little impact on the results of the NFT test, so IL (internal) can be ignored when calculating near-field signal strength;

After completing the NFT test of the antenna on the WIFI product 19 to be tested, turn off the antenna and the SMAⅠ port 10, coupler 9, RF line switch I8 and dual-band wireless radio frequency front end 7 connected to the antenna;

Step 4-5: Turn on other antennas and the SMA I port 10 connected to the corresponding antenna, the coupler 9, the RF line switch I 8, the dual-band wireless radio frequency front end 7, and follow steps 4-2 to 4- 4. Perform the NFT test using the method described in 4 until all antennas of the WIFI product 19 to be tested complete the NFT test;

Step 5, throughput test (the throughput test is used to verify whether the wireless performance of the WIFI product to be tested can meet the product acceptance specifications)

Step 5-1. First, the WIFI product 19 under test and the tester 1 are both in the shielding box. The host computer III21 (PC is used in this embodiment) is connected to the WIFI product 19 under test through the Ethernet network port. The host computer III21 connects to The WIFI product 19 under test issues a control command to turn on all the antennas of the WIFI product 19 under test; it issues a control command to the tester 1 through the host computer I22 to test and calibrate the antenna 24 and the SMAⅠ port 10 of the tester 1 , coupler 9, RF line switch I8, dual-band wireless radio frequency front-end 7 are set to the open state, and the tester 1 is set to the adaptive mode. Then, as shown in Figure 13, the host computer I22 searches for the pending signal through the tester 1. Test the SSID broadcast by the WIFI product 19. After searching for it, connect it through antenna coupling, thereby establishing the data from the host computer I22 to the tester 1, then to the calibration test antenna 24, and then connect to the standby server through near field coupling. Test WIFI product 19, and finally the path to the host computer III21;

Step 5-2, after completing the connection in step 5-1, complete the control of the data flow direction through the host computer I22 and the host computer III21 respectively, and complete the test of the data uplink throughput and data downlink throughput of the WIFI product 19 under test, Disconnect the tester 1 from the host computer I22 and the WIFI product 19 to be tested.

The above-described embodiments are only preferred embodiments of the present invention, and are not an exhaustive list of possible implementations of the present invention. For those of ordinary skill in the art, any obvious changes made without departing from the principle and spirit of the present invention should be considered to be included in the scope of the claims of the present invention.

Claims (5)

1. The WIFI performance and function tester is characterized by comprising a circuit board and a main control chip arranged on the circuit board, wherein an RS232 interface and a network port which are arranged on the main control chip and used for being connected with an upper computer I are provided, the main control chip carries out switching through control signals by an RF circuit switching switch II and 1 or more RF circuit switching switches I, a dual-frequency WIFI transceiver chip I connected with the main control chip is provided, and 1 or more dual-frequency wireless radio frequency front ends which are connected with the dual-frequency WIFI transceiver chip I and used for amplifying wireless transmission signals and receiving signals are provided; and 1 or more SMA I ports, SMA II ports, power divider I, SMA III ports, power divider II and dual-frequency WIFI transceiver chip II;

The SMA I port is connected with a coupler for coupling a WIFI product signal to be detected received by the SMA I port, the SMA I port is connected with an input port of the coupler, an output port of the coupler is connected with a public port of a corresponding RF line change-over switch I, a coupling port of the coupler is connected with a corresponding branch port on a power divider I, a branch port A of the RF line change-over switch I is connected with the dual-frequency wireless radio frequency front end, a branch port B of the RF line change-over switch I is connected with a corresponding branch port on a power divider II, a combining port of the power divider II is connected with a branch port A of the RF line change-over switch II, a combining port of the power divider I is connected with a branch port B of the RF line change-over switch II, and a public port of the RF line change-over switch II is connected with the SMA II port;

the SMA III port is connected with the dual-frequency WIFI transceiver chip II, and a USB interface connected with the upper computer II is arranged on the dual-frequency WIFI transceiver chip II;

the main control chip is a main control CPU with a network function, is integrated with an RS232 interface for control and debugging and can be connected with the upper computer I; the switching between the branch ports of the RF line switch I and the RF line switch II can be controlled through the upper computer I (22), so that signal transmission paths in the tester are changed according to different test projects, and when the branch A port of the RF line switch I is smooth and the branch A port and the branch B port of the RF line switch II are in a closed state, the transmission paths are the mode one transmission paths, and throughput test and NFT test can be performed; when the branch B port of the RF line change-over switch I and the branch A port of the RF line change-over switch II are kept smooth, the transmission path is a mode two transmission path, and the calibration of the WIFI product to be tested and the test of the WIFI static parameters can be carried out; when the SMA I port and the branch B port of the RF line change-over switch II are kept smooth, the transmission path is the transmission path of the mode three, and in addition, the branch A port of the RF line change-over switch I is required to be in an open state, and at the moment, the WIFI Tx static parameter test under the dynamic throughput can be performed.

2. The WIFI performance and function tester according to claim 1, wherein the main control chip is further connected with a toggle switch for sending the gear signals of the RF line change-over switch II and the RF line change-over switch I to the main control chip.

3. The WIFI performance and function tester according to claim 1, further comprising a DC power source and a DC power switch.

4. The WIFI performance and function tester according to claim 1, wherein the network port is an Ethernet LAN port; the upper computer I and the upper computer II are PC; the main control chip is connected with the dual-frequency WIFI transceiver chip I through a PCIe interface arranged on the main control chip.

5. The WIFI performance and function testing method is characterized by comprising the following steps of:

step one, insertion loss calibration

Step 1-1, firstly switching an RF circuit switch of a tester to enable a branch B port of an RF circuit switch I and a branch A port of an RF circuit switch II to be in an open state, then connecting a USB interface on the tester with an upper computer II, connecting an SMA III port with an antenna cable end of one antenna on a WIFI product to be tested through a radio frequency wire, connecting a corresponding SMA I port on the tester with a calibration test antenna through the radio frequency wire, and connecting the antenna on the WIFI product to be tested with the calibration test antenna through antenna near-field coupling; finally, connecting the SMA II port with a test signal receiving interface of the WIFI static parameter analyzer through a radio frequency line;

Step 1-2, after the upper computer II identifies the calibration system of the tester, the upper computer II controls the antenna transmitting power on the WIFI product to be tested, the transmitting power, the bandwidth, the modulation mode and the transmitting speed of the calibration system are set, the transmitting power of the SMAAIII port is 0dBm, the antenna transmitting power is transmitted through the SMAIII port, the antenna transmitting power reaches the antenna cable end of the antenna on the WIFI product to be tested, namely, the point A, the antenna on the WIFI product to be tested couples the received signal to the calibration test antenna in a mode of coupling the radio frequency signal with the antenna near field, and couples the calibration test antenna to the corresponding SMAI port, then sequentially passes through the RF line switch I, the power divider II and the RF line switch II in the tester to reach the SMAII port, the signal is transmitted to a test signal receiving interface of the WIFI static parameter analyzer through the radio frequency line, namely, the point B is then the power X, X=0 dBm-Loss (RFcable 1) -Loss (Ato B) is measured by the WIFI static parameter analyzer;

0dBm: SMAIII port transmit power; loss (RFcable 1): insertion loss of a radio frequency wire on the port of the SMA III is connected; loss (Ato B): insertion loss on a path from an antenna cable end of an antenna on a WIFI product to be tested, namely a point A, to a test signal receiving interface of a WIFI static parameter analyzer, namely a point B;

Step 1-3, firstly disconnecting a static parameter analyzer from an SMA II port, then disconnecting a corresponding SMA I port on a tester, namely a radio frequency line connected to a C point, from the SMAI port, connecting the SMA I port to a test signal receiving port of the static parameter analyzer, after an upper computer II identifies a calibration system of the tester, controlling the antenna transmitting power on a WIFI product to be tested through the upper computer II, setting the transmitting power, bandwidth and modulation mode of the calibration system, and transmitting the antenna transmitting power to an antenna cable end of the antenna on the WIFI product to be tested through the SMA III port, namely an A point, coupling the received signal to a calibration test antenna through an antenna near field coupling radio frequency signal mode, coupling the received signal to a test signal receiving interface of the static parameter analyzer through the calibration test antenna, and obtaining Loss (Ato C) = -ZdBm by measuring power Z, Z=0 dBm-Loo C;

the Loss (Ato C) is the insertion Loss on a path between an antenna cable end of an antenna on a WIFI product to be detected, namely a point A, and an SMAI port, namely a point C;

Step 1-4, disconnecting the SMA III port from the WIFI product to be tested, disconnecting the WIFI product to be tested from the calibration test antenna, and connecting the calibration test antenna to the WIFI static parameter analyzer, then directly connecting the SMA III port to the WIFI static parameter analyzer through a radio frequency line, setting the transmitting power of the SMA III port to be 0dBm, reaching a test signal receiving interface of the WIFI static parameter analyzer through the radio frequency line, and measuring by the WIFI static parameter analyzer to obtain power Y, wherein Y=0 dBm-Loss (RFcable 2); where Loss (RFcable 2) =loss (RFcable 1);

the insertion loss of the antenna on the whole antenna path on the WIFI product to be tested is as follows: loss (Path) =y-x=0 dBm-Loss (RFcable 2) - [0dBm-Loss (RFcable 1) -Loss (Ato B) ]=loss (Ato B);

step 1-5, measuring insertion Loss of other paths of antennas on the WIFI product to be tested according to the method in the steps 1-1 to 1-4 in sequence, compensating the Loss (Path) value of each Path of antenna into a WIFI static parameter analyzer, completing calibration test of all antennas on the WIFI product to be tested, and finally disconnecting the tester from the upper computer II and the WIFI product to be tested;

step two, radio frequency link transmitting power calibration and WIFI static parameter test of WIFI product

Step 2-1, after Loss (Path) is compensated in a WIFI static parameter analyzer, firstly placing a WIFI product to be tested and a tester in a shielding box, connecting the WIFI product to be tested with an Ethernet network card I of an upper computer III, connecting an antenna of the WIFI product to be tested with a calibration test antenna in a mode of antenna near-field coupling signals, connecting the calibration test antenna with a corresponding SMA port on the tester through a radio frequency line, connecting the upper computer I with an RS232 interface of the tester through a serial port connecting line, connecting the upper computer I with a network port of the tester through a network cable, and connecting an SMA II port of the tester with the WIFI static parameter analyzer through the radio frequency line; connecting a network port of the WIFI static parameter analyzer with an Ethernet network card II of the upper computer III through a network cable;

step 2-2, firstly, carrying out transmitting power calibration on each antenna link of a WIFI product to be tested, setting a calibration target power PT, then switching an RF circuit switch through an upper computer I to enable a branch B port of the RF circuit switch I and a branch A port of an RF circuit switch II to be in an open state, then controlling the WIFI product to be tested through an upper computer III, firstly setting a transmitting power parameter H0 (Index), setting a transmitting radio frequency signal power corresponding to the H0 (Index) as Px0, enabling the transmitting radio frequency signal to enter the tester through an SMA I port in a mode of coupling the radio frequency signal near field, entering an RF circuit switch Guan after sequentially passing through a coupler, the RF circuit switch I and a power divider II, and finally receiving or transmitting the signal to a WIFI static parameter analyzer through an SMA II port; the WIFI static parameter analyzer compensates insertion Loss (path) of the whole measuring link measured in the first step to a received radio frequency signal to obtain power Px0 transmitted by the antenna of the path on a WIFI product to be measured, then the WIFI static parameter analyzer feeds the power Px0 back to an upper computer III through a network port, the upper computer III compares the Px0 with target power PT, a second transmitting power parameter H1 (Index) is set in a dichotomy mode, the corresponding second transmitting power is Px1, the corresponding second transmitting power is transmitted to the WIFI static parameter analyzer, the power Px2 is measured, and the power Px0 is fed back to the upper computer III21 for comparison with PT; the steps are repeated until the power transmitted by the WIFI product to be tested is the same as the target power PT, at the moment, a transmitting power parameter Hn (Index) corresponding to the target power is obtained, and the upper computer III writes the transmitting power parameter Hn (Index) into the WIFI product through a network port, so that the transmitting power calibration of the antenna on the WIFI product to be tested is completed;

Step 2-3, firstly, switching an RF circuit switch through an upper computer I to enable a branch B port of the RF circuit switch I and a branch A port of an RF circuit switch II to be in an open state, then controlling a WIFI product to be tested to transmit or receive radio frequency signals through an upper computer III, enabling the transmitted or received radio frequency signals to reach a calibration test antenna in a mode of coupling the radio frequency signals through an antenna near field, enabling the radio frequency signals to enter the tester through an SMA I port, enabling the radio frequency signals to sequentially pass through a coupler, the RF circuit switch I and a power divider II, then enabling the radio frequency signals to enter the RF circuit switch Guan, and finally enabling the signals to be received or transmitted to a WIFI static parameter analyzer through an SMA II port; the WIFI static parameter test of the antenna on the WIFI product to be tested is completed;

step 2-4, switching to other paths of antennas respectively in sequence, and carrying out transmitting power calibration and WIFI static parameter test according to the methods in step 2-2 and step 2-3 in sequence until the WIFI transmitting power calibration and static parameter test of all antennas on the WIFI product to be tested are completed;

step three, WIFI Tx static parameter test under dynamic throughput

Step 3-1, firstly, a WIFI product to be tested and a tester are both in a shielding box, and an upper computer III issues a control command to the WIFI product to be tested, so that only one antenna on the WIFI product to be tested is in an open state; setting the tester to be in a self-adaptive mode, enabling an upper computer I to send a control command to the tester, switching an RF line switch to enable a branch B port of an RF line switch II and a branch A port of an RF line switch I which are connected with an antenna which is opened on a WIFI product to be tested to be in an open state, keeping the branch B port of the RF line switch II and the port of an SMA I smooth, searching an SSID broadcast by the WIFI product to be tested by the tester, connecting the SSID through an antenna coupling mode after searching, thereby establishing data from the upper computer I to the tester, calibrating a test antenna, connecting the antenna to the WIFI product to be tested through a near-field coupling mode, and finally connecting the SSID to a channel of the upper computer III;

Step 3-2, after the connection in step 3-1 is completed, the control of the data flow direction is completed through an upper computer I and an upper computer III respectively, a WIFI product to be tested is set to be a data uplink throughput test, namely a transmitting signal, the signal transmitted by an antenna of the WIFI product to be tested is transmitted to a calibration test antenna in a near-field coupling mode, enters the inside of a tester through an SMA I port, a radio frequency signal passes through a coupler and is transmitted to a branch port corresponding to a power divider I through a coupling port of the coupler, and then is transmitted to a WIFI static parameter analyzer through an SMA II port after passing through a combining port of the power divider I and a branch B port of an RF circuit switch II, so that the Tx WIFI static parameter test under the dynamic throughput of the antenna on the product to be tested is completed;

step 3-3, sequentially switching to other paths of antennas respectively, and sequentially testing according to the methods described in the steps 3-1 and 3-2 until the test of the static parameters of the WIFI Tx under the dynamic throughput of all the antennas on the WIFI product to be tested is completed;

step four, NFT test

Step 4-1, after the connection between the WIFI static parameter analyzer and the upper computer III is disconnected, the WIFI product to be tested and the tester are both arranged in a shielding box, the WIFI product to be tested is connected with an Ethernet network card of the upper computer III through a network cable, an antenna of the WIFI product to be tested is connected with a calibration test antenna in a mode of antenna near-field coupling signals, the calibration test antenna is connected with a corresponding SMA port on the tester through a radio frequency line, the upper computer I is connected with an RS232 interface of the tester through a serial port connecting line, the upper computer I is connected with a network port of the tester through the network cable, and an SMA II port of the tester is connected with the WIFI static parameter analyzer through the radio frequency line;

Step 4-2, the upper computer III gives a control command to the WIFI product to be tested, so that only one antenna on the WIFI product to be tested is in an open state, other antennas are all in a closed state, an SMA I port, a coupler and an RF circuit switching switch I which are connected with the antenna on the open state in the tester are all in an open state, and the SMA I port, the coupler and the RF circuit switching switch I which are connected with the antennas on the closed state are all in a closed state;

step 4-3, switching the RF circuit switch through the upper computer I to enable a branch A port connected with the antenna which is opened by the circuit to be in an open state, and enabling the RF circuit switch II to be in a closed state;

step 4-4, controlling the working state of the WIFI product to be tested through the upper computer III, enabling the tester to adapt to the connection rate and state of the WIFI product to be tested, searching the SSID broadcasted by the WIFI product to be tested through the tester by the upper computer I, connecting through an antenna coupling mode after searching, coupling the transmitting signals of the WIFI product to be tested through the antenna, entering the tester through an SMA I port, sequentially transmitting the transmitting signals to a main control chip through a coupler, an RF circuit switching switch I and a dual-frequency wireless radio frequency front end, transmitting the transmitting signals of the WIFI product to be tested through a dual-frequency WIFI transceiver chip I, and reading the transmitting signals of the WIFI product to be tested through an RS232 interface by the upper computer I to obtain the intensity RSSI of the transmitting signals;

Near field signal strength: NFTSSI = RSSI-Loss (Ato C) -IL (internal);

the Loss (Ato C) is the insertion Loss measured in the step one, on a path from an antenna cable end of an antenna on the WIFI product to be measured, namely, the point A to an SMAI port, namely, the point C; IL (internal) is the insertion loss of the receiving circuit from the SMA I port in the tester to the coupler to the RF circuit change-over switch I and then to the dual-frequency wireless radio frequency front end; the NFT test of the path of antenna on the WIFI product to be tested is completed, and then the path of antenna, an SMA I port, a coupler, an RF circuit switching switch I and a dual-frequency wireless radio frequency front end which are connected with the path of antenna are closed;

step 4-5, sequentially opening other paths of antennas, SMA I ports, couplers, RF line switching switches I and dual-frequency wireless radio frequency front ends which are connected with the corresponding antennas, and sequentially performing NFT tests according to the methods described in steps 4-2 to 4-4 until all antennas of the WIFI product to be tested complete NFT tests;

step five, throughput testing

Step 5-1, firstly, a WIFI product to be tested and a tester are both in a shielding box, an upper computer III is connected with the network port of the WIFI product to be tested through an Ethernet network port, and the upper computer III gives a control command to the WIFI product to be tested, so that all antennas of the WIFI product to be tested are in an open state; the method comprises the steps that a control command is issued to a tester through an upper computer I, a calibration antenna, an SMA I port of the tester, a coupler, an RF line switching switch I and a dual-frequency wireless radio frequency front end are tested, the tester is set to be in an open state, the tester is set to be in a self-adaptive mode, then the upper computer I searches the SSID broadcasted by a WIFI product to be tested through the tester, after the SSID is searched, the upper computer I is connected in an antenna coupling mode, so that data are established from the upper computer I to the tester, then to the calibration antenna, then to the WIFI product to be tested through a near-field coupling mode, and finally to a channel of the upper computer III;

And 5-2, after the connection of the step 5-1 is finished, the control of the data flow direction is finished through the upper computer I and the upper computer III respectively, and after the test of the uplink throughput and the downlink throughput of the data of the WIFI product to be tested is finished, the connection between the tester and the upper computer I and the WIFI product to be tested is disconnected.