Digital TR component automatic testing system and method

Abstract

The present invention discloses a digital TR component automatic testing system and method. A switch matrix is ​​used to switch the digital TR component and the test equipment connected to the digital signal processing device, switch the reference channel connected between the digital signal processing device and the switch matrix, and switch the radio frequency port currently tested by the digital TR component. The digital signal processing device digitally processes the radio frequency signal or converts the digital signal into a radio frequency signal and then sends it to the corresponding test equipment through the switch matrix. The digital TR component digitally processes the radio frequency signal and then sends it to the digital signal processing device, or receives a digital signal from the digital signal processing device and converts it into a radio frequency signal and then sends it to the corresponding test equipment through the switch matrix. The automated test equipment processes the digital signal transparently transmitted by the digital signal processing device or sends a digital signal to the digital signal processing device. The switch matrix can complete the digital automatic test switching between the receiving and transmitting test modes.

Description

Technical Field

[0001] The present invention relates to the field of automated testing technology, and in particular to a digital TR component automated testing system and method. Background Art

[0002] In automated RF device test systems, various test equipment typically only receive analog RF signals. This is because the input and output ports of the RF device under test are all RF signals. However, with the advancement of digitalization, many RF devices under test have become digitized, making it impossible for test equipment to directly measure the RF devices under test. Typical measuring instruments include vector network analyzers, power meters, and spectrum analyzers. Transmit mode testing includes transmit phase consistency and transmit gain testing. When using multiple RF test equipment, implementing digital TR component testing is a challenge. Summary of the Invention

[0003] The purpose of the present invention is to provide a digital TR component automatic testing method and system, which constructs an automatic testing system through digital signal processing equipment and a switch matrix, and can complete automatic test switching between receiving and transmitting test modes.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] On the one hand, the present application provides a digital TR component automatic test system, including test equipment, a switch matrix, a digital TR component, a digital signal processing device and an automatic test device, wherein the test equipment includes a vector network analyzer, a power meter and a signal source, wherein:

[0006] The switch matrix is ​​used to switch the digital TR component and the test equipment connected to the digital signal processing device according to the test item currently being executed, switch the reference channel connected between the digital signal processing device and the switch matrix, and switch the RF port currently being tested by the digital TR component;

[0007] The digital signal processing device is used to digitally process the radio frequency signal of the test device transmitted through the switch matrix according to the test item currently being executed, or to convert the digital signal into a radio frequency signal and then send it to the corresponding test device through the switch matrix;

[0008] The digital TR component is used to digitize the radio frequency signal of the test equipment transmitted through the switch matrix according to the test item currently being executed, and then send it to the digital signal processing device, or receive the digital signal from the digital signal processing device, convert it into a radio frequency signal, and then send it to the corresponding test equipment through the switch matrix;

[0009] The automated test equipment is used to process the digital signal transmitted by the digital signal processing device or send a digital signal to the digital signal processing device according to the test item currently being executed.

[0010] In some specific embodiments, the switch matrix includes a power splitter, a test equipment switching switch module, a mode selection switch, a channel selection switch, and several interface selection switches corresponding to each test channel, wherein the vector network analyzer is connected to the input end of the power splitter, the test equipment switching switch module is respectively connected to each test equipment, the output end of the power splitter, the switch end of the channel selection switch, and the switch end of the mode selection switch, the enable end of the mode selection switch is respectively connected to the DA end and the AD end of the digital signal processing device, the enable end of the channel selection switch is respectively connected to the switch end of each interface selection switch, and the enable end of each interface selection switch is respectively connected to the RF port of the digital TR component.

[0011] In some specific embodiments, the test equipment switching switch module includes a first selection switch, a second selection switch, a third selection switch, a fourth selection switch, and a fifth selection switch, wherein the second selection switch, the third selection switch, and the fourth selection switch are all single-pole double-throw switches, including one switch end and two selection ends, the fifth selection switch is a single-pole four-throw switch, and the first selection switch is a single-pole three-throw switch, wherein,

[0012] The switch end of the first selection switch is connected to the switch end of the mode selection switch, the enable end of the first selection switch is respectively connected to the enable end of the fourth selection switch, the enable end of the second selection switch and the output end of the power divider, the switch end of the second selection switch is connected to the switch end of the fifth selection switch, the enable end of the third selection switch is respectively connected to the output end of the power divider and the enable end of the second selection switch, the switch end of the third selection switch is connected to the switch end of the channel selection switch, the switch end of the fourth selection switch is connected to the P1 end of the vector network analyzer, the enable end of the fourth selection switch is respectively connected to the input end of the power divider and the enable end of the first selection switch, and the gate end of the fifth selection switch is respectively connected to the P2 port, power meter, signal source and spectrum analyzer of the vector network analyzer.

[0013] In some specific implementations, if the test item currently being performed is a transmit gain test, the automated test equipment is used to generate a beam weight corresponding to the currently tested channel of the digital TR component, and send the beam weight and frequency parameters to the digital signal processing device;

[0014] The switch matrix operates to switch the test equipment connected to the digital TR component to the power meter;

[0015] The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send it to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the power meter through the switch matrix.

[0016] The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal, and then send the RF signal to the power meter through the switch matrix switching port;

[0017] The power meter is used to compare the received RF analog signal with the RF signal to obtain the transmission gain test result.

[0018] In some specific implementations, if the test item currently being executed is a transmission gain test, the action process of the switch matrix is:

[0019] Switching the fifth selection switch to the gate end connected to the power meter, switching the second selection switch to the gate end connected to the first selection switch, and switching the first selection switch to the gate end connected to the second selection switch;

[0020] Switching the mode selection switch to the enable end connected to the transmit reference channel allows the RF signal to be transmitted to the power meter through the switch matrix along the transmit reference channel;

[0021] Switch the second selection switch to the gate end connected to the third selection switch, and switch the third selection switch to the gate end connected to the second selection switch, so that the radio frequency signal sent by the digital TR component is transmitted to the power meter along the third selection switch and the second selection switch;

[0022] The channel selection switch is used to select the current test channel of the digital TR component;

[0023] The interface selection switch is used to select the current test interface in the current test channel, and the radio frequency signal is transmitted to the switch matrix along the selected current test channel and the current test interface.

[0024] In some specific implementations, if the test item currently being performed is a transmit phase consistency test, the automated test equipment is used to generate a beam weight corresponding to the currently tested channel of the digital TR component, and send the beam weight and frequency parameters to the digital signal processing device;

[0025] The switch matrix operates to switch the test equipment connected to the digital TR component to the vector network analyzer;

[0026] The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send them to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the P1 port of the vector network analyzer through the switch matrix.

[0027] The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal and send the RF signal to the P2 port of the vector network analyzer;

[0028] The vector network analyzer is used to compare the received RF analog signal with the RF signal to obtain the transmit phase consistency test result.

[0029] In some specific implementations, if the test item currently being executed is a transmit phase consistency test, the operation process of the switch matrix is ​​as follows:

[0030] Switching the mode selection switch to a gate end connected to the transmit reference channel, switching the first selection switch to a gate end connected to the fourth conversion switch, and switching the fourth selection switch to a gate end connected to the first selection switch, so that the RF analog signal is transmitted along the transmit reference channel to the P1 port of the vector network analyzer;

[0031] Switch the third selection switch to the gate end that is conductive with the second selection switch, switch the second selection switch to the gate end that is conductive with the third selection switch, and switch the fifth selection switch to the gate end that is conductive with the P2 port of the vector network analyzer, so that the RF signal sent by the digital TR component is sent to the P2 port of the vector network analyzer along the conductive path.

[0032] In some specific implementations, if the test item currently being executed is a receive phase consistency test, the operation process of the switch matrix is ​​as follows:

[0033] Switching the fourth switch to the enable end connected to the power divider, so that the vector network analyzer sends the radio frequency single tone signal to the power divider;

[0034] The power splitter splits the single-tone signal emitted by the vector network analyzer into a first radio frequency signal and a second radio frequency signal;

[0035] Switching the first selection switch to the gate end connected to the power divider, and switching the third switch to the gate end connected to the power divider, so that the first radio frequency signal is transmitted along the first selection switch to the mode selection switch, and the second radio frequency signal is transmitted along the third switch to the channel selection switch;

[0036] The channel selection switch is used to select the current test channel of the digital TR component;

[0037] The interface selection switch is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0038] In a second aspect, the present application provides a digital TR component automatic testing method, which uses the digital TR component automatic testing system described in the first aspect, including an automatic transmission testing method, specifically comprising the following steps:

[0039] S1. Load the test items of transmit phase consistency test and transmit gain test respectively;

[0040] S2. When the corresponding test item needs to be executed, the switch matrix, digital TR component and digital signal processing device are configured, and a switch action instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0041] S3. When the corresponding test item starts to be executed, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0042] S4. The automatic test software generates the baseband frequency data required for the digital TR component test and packages the baseband frequency data and sends it to the digital TR component. At the same time, the baseband frequency data is converted into a radio frequency analog signal and sent to the corresponding test equipment through the switch matrix.

[0043] S5, the digital TR component converts the baseband frequency data into a radio frequency signal, and sends the radio frequency signal to the corresponding test equipment through the switch matrix;

[0044] S6. The test equipment measures the received RF analog signal and RF signal to obtain the transmission test result; the switch matrix is ​​controlled to switch to each RF port of the digital TR component in turn until the test of all RF ports of the digital TR component is completed.

[0045] In a third aspect, the present application provides a digital TR component automatic reception test method, which is applied to the digital TR component automatic test system described in the first aspect, including an automatic reception test method, specifically comprising the following steps:

[0046] S11, loading the test items of the receiving phase consistency test and the receiving gain test respectively;

[0047] S21. When a corresponding test item needs to be executed, the switch matrix, the digital TR component, and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0048] S31, when starting to execute the corresponding test item, sending a port switching instruction for switching the test channel and the test interface to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0049] S41, digital TR component and digital signal processing equipment respectively receive the radio frequency signal sent by the test equipment through the switch matrix, and obtain the digital signal after digital processing and output it to the automatic test software;

[0050] S51. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S31-S41 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] This application uses digital signal processing equipment and a switch matrix to control the switch matrix to switch to the corresponding test equipment and test channels according to the current required test scenario, completing the digital test process of the receiving and transmitting test scenarios;

[0053] When conducting a transmission test, the automatic test software is used to generate the beam weights and frequency parameters required for the digital TR component test. The digital signal processing device generates baseband IQ data based on the beam weights and frequency information. The baseband IQ data is converted into an RF signal by DA conversion and then sent to the corresponding test equipment through the transmission reference channel. At the same time, the digital TR component processes the baseband IQ data to obtain an RF signal, which is sent to the corresponding test equipment through the switch matrix to complete the transmission test.

[0054] During the receive phase consistency test, a digital signal processing device generates the baseband frequency data required for testing the digital TR component. This data is then split into two paths: one path is converted into an analog RF signal receivable by a vector network analyzer and sent to the vector network analyzer via a switch matrix. The other path is sent to the digital TR component via a high-speed digital optical fiber. The digital TR component converts the signal into an RF signal, which is then sent to the other port of the vector network analyzer via a switch matrix. The vector network analyzer measures the signals at both ports to obtain the transmit phase consistency test results. By switching each interface of each channel using the switch matrix and generating reference signals using the digital signal processing device, automated testing of the RF ports of the digital TR component is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic diagram of an automatic testing system provided by an embodiment of the present invention;

[0056] Figure 2 A signal flow diagram for a transmission gain test according to an embodiment of the present invention;

[0057] Figure 3 Signal flow diagram for the transmit phase consistency test provided by an embodiment of the present invention;

[0058] Figure 4 Signal flow diagram for receiving phase consistency test provided by an embodiment of the present invention;

[0059] Figure 5 This is a signal flow diagram during the receiving gain test provided by an embodiment of the present invention.

[0060] Reference numerals: DETAILED DESCRIPTION

[0061] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0062] Unless otherwise specifically stated, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0063] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0064] Additionally, descriptions of well-known structures, functions, and configurations may be omitted for clarity and conciseness. Those skilled in the art will recognize that various changes and modifications can be made to the examples described herein without departing from the spirit and scope of the present disclosure.

[0065] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0066] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0067] Example 1

[0068] This embodiment provides a digital TR component automatic test system, including test equipment, a switch matrix, a digital TR component, a digital signal processing device, and an automatic test device. The test equipment includes a vector network analyzer, a power meter, and a signal source.

[0069] The switch matrix is ​​used to switch the digital TR component and the test equipment connected to the digital signal processing device according to the test item currently being executed, switch the reference channel connected between the digital signal processing device and the switch matrix, and switch the RF port currently being tested by the digital TR component;

[0070] The digital signal processing device is used to digitally process the radio frequency signal of the test device transmitted through the switch matrix according to the test item currently being executed, or to convert the digital signal into a radio frequency signal and then send it to the corresponding test device through the switch matrix;

[0071] The digital TR component is used to digitize the radio frequency signal of the test equipment transmitted through the switch matrix according to the test item currently being executed, and then send it to the digital signal processing device, or receive the digital signal from the digital signal processing device, convert it into a radio frequency signal, and then send it to the corresponding test equipment through the switch matrix;

[0072] The automated test equipment is used to process the digital signal transmitted by the digital signal processing device or send a digital signal to the digital signal processing device according to the test item currently being executed.

[0073] Specifically, the switch matrix includes a power divider 6, a test equipment switching switch module, a mode selection switch 7, a channel selection switch 1, and several interface selection switches 2-5 corresponding to each test channel, wherein the vector network analyzer is connected to the input end of the power divider 6, the test equipment switching switch module is respectively connected to each test equipment, the output end of the power divider 6, the switch end of the channel selection switch 1, and the switch end of the mode selection switch 7, the enable end of the mode selection switch 7 is respectively connected to the DA end and the AD end of the digital signal processing device, the enable end of the channel selection switch 1 is respectively connected to the switch end of each interface selection switch 2-5, and the enable end of each interface selection switch 2-5 is respectively connected to the RF port of the digital TR component.

[0074] More specifically, the test equipment switch module includes a first selection switch 8, a second selection switch 9, a third selection switch 10, a fourth selection switch 11 and a fifth selection switch 12, wherein the second selection switch 9, the third selection switch 10 and the fourth selection switch 11 are all single-pole double-throw switches, including one switch end and two selection ends, the fifth selection switch 12 is a single-pole four-throw switch, and the first selection switch 8 is a single-pole three-throw switch.

[0075] The switch end of the first selection switch 8 is connected to the switch end of the mode selection switch 7, the selection end of the first selection switch 8 is respectively connected to the selection end of the fourth selection switch 11, the selection end of the second selection switch 9 and the output end of the power divider 6, the switch end of the second selection switch 9 is connected to the switch end of the fifth selection switch 12, the selection end of the third selection switch 10 is respectively connected to the output end of the power divider 6 and the selection end of the second selection switch 9, the switch end of the third selection switch 10 is connected to the switch end of the channel selection switch 1, the switch end of the fourth selection switch 11 is connected to the P1 end of the vector network analyzer, the selection end of the fourth selection switch 11 is respectively connected to the input end of the power divider 6 and the selection end of the first selection switch 8, and the selection end of the fifth selection switch 12 is respectively connected to the P2 port, power meter, signal source and spectrum analyzer of the vector network analyzer.

[0076] If the test item currently being executed is a transmit gain test, the automated test equipment is used to generate the beam weight corresponding to the current tested channel of the digital TR component and send the beam weight and frequency parameters to the digital signal processing device;

[0077] The switch matrix operates to switch the test equipment connected to the digital TR component to the power meter;

[0078] The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send it to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the power meter through the switch matrix.

[0079] The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal, and then send the RF signal to the power meter through the switch matrix switching port;

[0080] The power meter is used to compare the received RF analog signal with the RF signal to obtain the transmission gain test result.

[0081] like Figure 2 As shown in the figure, if the test item currently being executed is the transmit gain test, the signal flow is shown as the dotted line in the figure, and the action process of the switch matrix is:

[0082] Switch the fifth selection switch 12 to the gate end connected to the power meter, switch the second selection switch 9 to the gate end connected to the first selection switch 8, and switch the first selection switch 8 to the gate end connected to the second selection switch 9;

[0083] Switch the mode selection switch 7 to the enable end connected to the transmit reference channel, so that the RF signal is transmitted to the power meter through the switch matrix along the transmit reference channel;

[0084] Switch the second selection switch 9 to the gate end connected to the third selection switch 10, and switch the third selection switch 10 to the gate end connected to the second selection switch 9, so that the radio frequency signal sent by the digital TR component is transmitted to the power meter along the third selection switch 10 and the second selection switch 9;

[0085] Channel selection switch 1 is used to select the current test channel of the digital TR component;

[0086] The interface selection switch 2 is used to select the current test interface in the current test channel, and the radio frequency signal is transmitted to the switch matrix along the selected current test channel and the current test interface.

[0087] If the test item currently being performed is a transmit phase consistency test, the automated test equipment is used to generate the beam weight corresponding to the current tested channel of the digital TR component and send the beam weight and frequency parameters to the digital signal processing device;

[0088] The switch matrix operates to switch the test equipment connected to the digital TR component to the vector network analyzer;

[0089] The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send them to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the P1 port of the vector network analyzer through the switch matrix.

[0090] The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal and send the RF signal to the P2 port of the vector network analyzer;

[0091] The vector network analyzer is used to compare the received RF analog signal with the RF signal to obtain the transmit phase consistency test result.

[0092] like Figure 3 As shown in the figure, if the test item currently being executed is the transmit phase consistency test, the signal flow is shown as the dotted line in the figure, and the action process of the switch matrix is:

[0093] Switch the mode selection switch 7 to the gate end connected to the transmit reference channel, switch the first selection switch 8 to the gate end connected to the fourth conversion switch, and switch the fourth selection switch 11 to the gate end connected to the first selection switch 8, so that the RF analog signal is transmitted along the transmit reference channel to the P1 port of the vector network analyzer;

[0094] The third selection switch 10 is switched to the gate end connected to the second selection switch 9, the second selection switch 9 is switched to the gate end connected to the third selection switch 10, and the fifth selection switch 12 is switched to the gate end connected to the P2 port of the vector network analyzer, so that the RF signal sent by the digital TR component is sent to the P2 port of the vector network analyzer along the conduction path.

[0095] In existing technology, the transmit phase consistency test of TR components is typically performed using a vector network analyzer (VNA) to measure the phase of the TR component channel under test and transmit the test results back to the mobile terminal for phase consistency testing. However, VNAs typically transmit RF analog signals. With the digitization of TR components, digital TR components output baseband digital signals, which VNAs cannot directly process. Furthermore, to achieve automated testing and maximize the number of VNAs used, only one VNA is typically used. Therefore, only one test channel of the TR component is connected at a time, making it impossible to use the phase of other channels as a reference for testing during transmit phase consistency testing.

[0096] like Figure 4 As shown in the figure, if the test item currently being executed is the receive phase consistency test, the signal flow is shown as the dotted line in the figure, and the action process of the switch matrix is:

[0097] Switch the fourth switch to the enable end connected to the power divider 6, and the vector network analyzer sends the RF single tone signal to the power divider 6;

[0098] The power splitter 6 splits the single-tone signal emitted by the vector network analyzer into a first radio frequency signal and a second radio frequency signal;

[0099] Switch the first selection switch 8 to the gate end connected to the power divider 6, and switch the third switch to the gate end connected to the power divider 6, so that the first RF signal is transmitted along the first selection switch 8 to the mode selection switch 7, and the second RF signal is transmitted along the third switch to the channel selection switch 1;

[0100] Channel selection switch 1 is used to select the current test channel of the digital TR component;

[0101] The interface selection switch 2 is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0102] After the first RF signal is processed by the digital TR component, the first baseband IQ signal is obtained and transmitted to the digital signal processing device through a high-speed digital optical fiber. After the digital signal processing device receives the second RF signal from the receiving reference channel, it is synchronously sampled and digitally down-converted into a second baseband IQ signal inside the digital signal processing device. The baseband IQ data is the digital baseband signal after the RF signal is sampled and digitally down-converted. Sampling is the digitization of the RF signal, and digital down-conversion is the baseband IQ signal after the digitized RF signal is extracted, filtered, and interpolated. Finally, the digital signal processing device transparently transmits the first baseband IQ signal and the second baseband IQ signal to the automatic test equipment (an industrial computer is used in this embodiment). The automatic test software in the industrial computer calls the FFT algorithm and performs FFT algorithm calculations on the first baseband IQ signal and the second baseband IQ signal respectively to obtain the phase PH1 of the channel interface corresponding to the digital TR component and the phase PH0 transmitted through the reference channel. The received phase consistency test result is recorded as: PH1-PH0;

[0103] like Figure 5 As shown in the figure, if the test item currently being executed is the receive gain test, the signal flow is shown as the dotted line in the figure, and the action process of the switch matrix is:

[0104] Switch the fifth selection switch 12 to the gate end connected to the signal source, switch the first selection switch 8 to the gate end connected to the second selection switch 9, and switch the second selection switch 9 to the gate end connected to the first selection switch 8, so that the radio frequency signal output by the signal source is transmitted along the second switch and the first switch;

[0105] Switch the mode selection switch 7 to the strobe end connected to the receiving reference channel, so that the radio frequency signal is transmitted along the receiving reference channel to the AD port of the digital signal processing device;

[0106] If the frequency of the current RF signal is within the receiving range of the digital TR component, the switch of the second selection switch 9 is switched to the gate end connected to the third switch, and the switch of the third switch is switched to the gate end connected to the second selection switch 9, so that the RF signal is transmitted to the channel selection switch 1 along the second switch and the third switch;

[0107] Channel selection switch 1 is used to select the current test channel of the digital TR component;

[0108] The interface selection switch 2 is used to select the current test interface in the current test channel, and the radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0109] The signal source outputs a single-tone signal with a frequency of F0 and a power of P0 to the RF port of the digital TR component. The digital TR component outputs baseband IQ data to the digital signal processing device via a high-speed digital optical fiber. The digital signal processing device transparently transmits the baseband IQ data to the industrial computer. The automatic test software uses the FFT algorithm to calculate the amplitude P1 of the baseband IQ data. The receiving gain is recorded as: P1-P0+δ(input link loss).

[0110] Example 2

[0111] This embodiment provides a method for automatically transmitting a digital TR component, including the following steps:

[0112] S1. Load the test items of transmit phase consistency test and transmit gain test respectively;

[0113] S2. When the corresponding test item needs to be executed, the switch matrix, digital TR component and digital signal processing device are configured, and a switch action instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0114] S3. When the corresponding test item starts to be executed, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0115] S4. The automatic test software generates the baseband frequency data required for the digital TR component test and packages the baseband frequency data and sends it to the digital TR component. At the same time, the baseband frequency data is converted into RF analog signals and sent to the corresponding test equipment through the switch matrix.

[0116] S5, the digital TR component performs DA conversion on the baseband frequency data to obtain an RF signal, and sends the RF signal to the corresponding test equipment through the switch matrix; DA conversion includes performing DAC sampling, IQ modulation and up-conversion on the baseband IQ frequency data in sequence to obtain an RF analog signal.

[0117] S6. The test equipment measures the received RF analog signal and RF signal to obtain the transmission test result; the switch matrix is ​​controlled to switch to each RF port of the digital TR component in turn until the test of all RF ports of the digital TR component is completed.

[0118] When the test item of the transmit phase consistency test is executed, the test equipment is a vector network analyzer, the switch matrix is ​​switched to the vector network analyzer and connected to the digital TR component, and the specific test process of the automatic test software is as follows:

[0119] Step 1: Open the automatic test program, set the vector network analyzer to receiver mode, and control the digital TR component and digital signal processing device to switch the test mode to transmission mode;

[0120] Step 2: The automatic test equipment generates the baseband frequency data required for digital TR component testing, packages the baseband frequency data, and sends it to the digital TR component. The baseband frequency data is converted into an RF analog signal. The specific process of converting the baseband IQ frequency data into an RF analog signal is to perform DAC sampling, IQ modulation, and up-conversion on the baseband IQ frequency data in sequence to obtain the RF analog signal. Finally, the RF analog signal is sent to a port of the vector network analyzer through the switch matrix.

[0121] The process of generating baseband frequency data is as follows:

[0122] Determine the beam weight and select the carrier frequency based on the transmit phase consistency test item of the digital TR component;

[0123] The beam weight and carrier frequency are sent to the digital signal processing device. The digital signal processing device performs IQ modulation on the baseband signal according to the selected carrier frequency to obtain baseband point frequency data.

[0124] Step 3: The digital TR component converts the baseband frequency data into a radio frequency signal, and sends the radio frequency signal to another port of the vector network analyzer through the switch matrix;

[0125] Step 4: The vector network analyzer compares the received RF analog signal with the RF signal to obtain a transmit phase consistency test result;

[0126] Step 5: Control the switch matrix to switch to each RF port of the digital TR component in turn, and send port switching instructions for switching the test channel and test interface to the switch matrix, so that one RF port in one channel of the digital TR component is connected to the vector network analyzer until the test of all RF ports of the digital TR component is completed.

[0127] When executing the transmission gain test item, the test equipment is: the switch matrix is ​​switched to the power meter and connected to the digital TR component. The specific test process of the automatic test software is as follows:

[0128] 1) The automatic test software generates the beam weights corresponding to the channel under test and sends the weights and frequency parameters to the digital signal processing device;

[0129] 2) After receiving the weights and frequency information, the digital signal processing device generates baseband IQ point frequency data (baseband IQ power P0) based on the frequency information, packages it and sends it to the digital TR component;

[0130] 3) The digital TR component outputs the RF signal to the power meter, which directly measures the power P1;

[0131] 4) Record the transmission gain: P1-P0-δ (output link loss).

[0132] Example 3

[0133] This embodiment provides a digital TR component automatic reception test method, which is applied to the digital TR component automatic test system of embodiment 1 and includes the following steps:

[0134] S11, loading the test items of the receiving phase consistency test and the receiving gain test respectively;

[0135] S21. When a corresponding test item needs to be executed, the switch matrix, the digital TR component, and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0136] S31, when starting to execute the corresponding test item, sending a port switching instruction for switching the test channel and the test interface to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0137] S41, digital TR component and digital signal processing equipment respectively receive the radio frequency signal sent by the test equipment through the switch matrix, and obtain the digital signal after digital processing and output it to the automatic test software;

[0138] S51. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S31-S41 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

[0139] When performing the receive phase consistency test, the test equipment is a vector network analyzer. The switch matrix is ​​switched to the vector network analyzer and connected to the digital TR component. The specific test process of the automatic test software is as follows:

[0140] S110: Set the current test mode of the digital TR component to receive phase consistency test and generate control parameters for distribution. The switch matrix, digital TR component, and digital signal processing device perform mode configuration according to the control parameters.

[0141] S210, opening the automatic test program, sending a port switching instruction for switching the test channel and the test interface to the switch matrix, so that one RF port in one channel of the digital TR component is connected to the vector network analyzer;

[0142] S310: Receive a first baseband signal and a second baseband signal transparently transmitted by a digital signal processing device, where the second baseband signal is an output signal corresponding to a currently enabled RF port, and the first baseband signal is a reference signal sent by the digital signal processing device, and the frequency of the reference signal is the same as the frequency of the output signal of the digital TR component;

[0143] The process of obtaining the first baseband signal is:

[0144] S311, receiving a single tone signal sent by a vector network analyzer;

[0145] S312: The switch matrix splits the single-tone signal into a first analog signal and a second analog signal, and sends the second analog signal to the digital TR component along the currently turned-on RF port;

[0146] S313: The second analog signal is digitized by the digital TR component to obtain a second baseband signal;

[0147] S314: Output the second baseband signal to a digital signal processing device.

[0148] The specific process of obtaining the first baseband signal is:

[0149] S321, when the automatic test program is turned on, a switch switching instruction for mode selection switching is also sent to the switch matrix, so that the switch matrix sends the first analog signal to the AD port of the digital signal processing device;

[0150] S322, synchronously sampling the first analog signal to obtain sampling data;

[0151] S323 , performing digital down-conversion processing on the sampled data to obtain a first baseband signal, wherein the digital down-conversion processing includes sequentially performing decimation, filtering, and interpolation processing.

[0152] S410, calling an FFT algorithm to calculate phase values ​​of the first baseband signal and the second baseband signal to obtain a first phase of the first baseband signal and a second phase of the second baseband signal;

[0153] S510: Calculate the difference between the first phase and the second phase to obtain a receive phase consistency test result of the currently turned-on RF port of the digital TR component;

[0154] S610 , repeat steps S210 - S510 until the test of all RF ports of the digital TR component is completed.

[0155] When the receiving gain test is performed, the test device is the signal source, and the switch matrix is ​​switched to connect the signal source and the digital TR component. The specific test process is as follows:

[0156] S100, the signal source outputs a single-tone RF signal with a frequency of F0 and a power of P0;

[0157] S200, the switch matrix receives a port switching instruction, first connecting the signal source and the reference receiving channel of the digital signal processing device, so that the single-tone RF signal is transmitted to the digital signal processing device along the reference receiving channel;

[0158] S300, the digital signal processing device digitally processes the single-tone radio frequency signal to obtain a first baseband IQ signal and transmits it to the automatic test software;

[0159] S400: Determine whether the frequency F0 of the first baseband IQ signal is within the receiving range of the digital TR component. If so, send a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the signal source.

[0160] S500: The signal source outputs a single-tone RF signal to the RF port currently turned on by the digital TR component. The digital TR component digitally processes the single-tone RF signal to obtain a second baseband IQ signal and outputs it to the digital signal processing device.

[0161] S600: The automatic test software receives the transparently transmitted second baseband IQ signal from the digital signal processing device, calls the FFT algorithm, calculates the amplitudes of the first baseband IQ signal and the second baseband IQ signal, and obtains a receive gain test result.

[0162] The digital processing process is as follows: synchronously collecting the single-tone RF signal to obtain sampled data, and digitally down-converting the sampled data to obtain a digital signal. The digital down-conversion process includes sequential decimation, filtering, and interpolation.

[0163] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. Digital TR component automatic test system, including test equipment, characterized in that, It also includes switch matrices, digital TR components, digital signal processing equipment, and automatic test equipment. The test equipment includes vector network analyzers, power meters, and signal sources. The switch matrix is ​​used to switch the digital TR component and the test equipment connected to the digital signal processing device according to the test item currently being executed, switch the reference channel connected between the digital signal processing device and the switch matrix, and switch the RF port currently being tested by the digital TR component; The switch matrix includes a power splitter, a test equipment switching switch module, a mode selection switch, a channel selection switch, and several interface selection switches corresponding to each test channel. The vector network analyzer is connected to the input end of the power splitter, the test equipment switching switch module is respectively connected to each test equipment, the output end of the power splitter, the switch end of the channel selection switch, and the switch end of the mode selection switch. The strobe end of the mode selection switch is respectively connected to the DA end and AD end of the digital signal processing device, the strobe end of the channel selection switch is respectively connected to the switch end of each interface selection switch, and the strobe end of each interface selection switch is respectively connected to the RF port of the digital TR component. The digital signal processing device is used to digitally process the radio frequency signal of the test device transmitted through the switch matrix according to the test item currently being executed, or to convert the digital signal into a radio frequency signal and then send it to the corresponding test device through the switch matrix; The digital TR component is used to digitize the radio frequency signal of the test equipment transmitted through the switch matrix according to the test item currently being executed, and then send it to the digital signal processing device, or receive the digital signal from the digital signal processing device, convert it into a radio frequency signal, and then send it to the corresponding test equipment through the switch matrix; The automated test equipment is used to process the digital signal transmitted by the digital signal processing device or send a digital signal to the digital signal processing device according to the test item currently being executed.

2. The digital TR component automatic testing system according to claim 1, characterized in that: The test equipment switching switch module includes a first selection switch, a second selection switch, a third selection switch, a fourth selection switch and a fifth selection switch, wherein the second selection switch, the third selection switch and the fourth selection switch all adopt single-pole double-throw switches, including one switch end and two gate ends, the fifth selection switch adopts a single-pole four-throw switch, and the first selection switch adopts a single-pole three-throw switch, wherein the switch end of the first selection switch is connected to the switch end of the mode selection switch, the gate end of the first selection switch is respectively connected to the gate end of the fourth selection switch, the gate end of the second selection switch and the output end of the power divider, the switch end of the second selection switch is connected to the switch end of the fifth selection switch, the gate end of the third selection switch is respectively connected to the output end of the power divider and the gate end of the second selection switch, the switch end of the third selection switch is connected to the switch end of the channel selection switch, the switch end of the fourth selection switch is connected to the P1 end of the vector network analyzer, the gate end of the fourth selection switch is respectively connected to the input end of the power divider and the gate end of the first selection switch, and the gate end of the fifth selection switch is respectively connected to the P2 port, power meter, signal source and spectrum analyzer of the vector network analyzer.

3. The digital TR component automatic testing system according to claim 2, characterized in that: If the test item currently being executed is a transmit gain test, the automated test equipment is used to generate the beam weight corresponding to the current tested channel of the digital TR component and send the beam weight and frequency parameters to the digital signal processing device; The switch matrix operates to switch the test equipment connected to the digital TR component to the power meter; The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send it to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the power meter through the switch matrix. The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal, and then send the RF signal to the power meter through the switch matrix switching port; The power meter is used to compare the received RF analog signal with the RF signal to obtain the transmission gain test result.

4. The digital TR component automatic testing system according to claim 3, characterized in that: If the test item currently being executed is the transmit gain test, the switch matrix operation process is as follows: Switching the fifth selection switch to the gate end connected to the power meter, switching the second selection switch to the gate end connected to the first selection switch, and switching the first selection switch to the gate end connected to the second selection switch; Switching the mode selection switch to the enable end connected to the transmit reference channel allows the RF signal to be transmitted to the power meter through the switch matrix along the transmit reference channel; Switch the second selection switch to the gate end connected to the third selection switch, and switch the third selection switch to the gate end connected to the second selection switch, so that the radio frequency signal sent by the digital TR component is transmitted to the power meter along the third selection switch and the second selection switch; The channel selection switch is used to select the current test channel of the digital TR component; The interface selection switch is used to select the current test interface in the current test channel, and the radio frequency signal is transmitted to the switch matrix along the selected current test channel and the current test interface.

5. The digital TR component automatic testing system according to claim 2, characterized in that: If the test item currently being performed is a transmit phase consistency test, the automated test equipment is used to generate the beam weight corresponding to the current tested channel of the digital TR component and send the beam weight and frequency parameters to the digital signal processing device; The switch matrix operates to switch the test equipment connected to the digital TR component to the vector network analyzer; The digital signal processing device is used to generate baseband IQ point frequency data based on the received beam weights and frequency parameters, package the baseband IQ point frequency data and send them to the digital TR component. At the same time, the baseband IQ point frequency data is converted into RF analog signals and sent to the P1 port of the vector network analyzer through the switch matrix. The digital TR component is used to process the baseband IQ frequency data to obtain the RF signal and send the RF signal to the P2 port of the vector network analyzer; The vector network analyzer is used to compare the received RF analog signal with the RF signal to obtain the transmit phase consistency test result.

6. The digital TR component automatic testing system according to claim 5, characterized in that: If the test item currently being executed is the transmit phase consistency test, the switch matrix operation process is as follows: Switching the mode selection switch to a gate end connected to the transmit reference channel, switching the first selection switch to a gate end connected to the fourth conversion switch, and switching the fourth selection switch to a gate end connected to the first selection switch, so that the RF analog signal is transmitted along the transmit reference channel to the P1 port of the vector network analyzer; Switch the third selection switch to the gate end that is conductive with the second selection switch, switch the second selection switch to the gate end that is conductive with the third selection switch, and switch the fifth selection switch to the gate end that is conductive with the P2 port of the vector network analyzer, so that the RF signal sent by the digital TR component is sent to the P2 port of the vector network analyzer along the conductive path.

7. The digital TR component automatic testing system according to claim 2, characterized in that: If the test item currently being executed is the receive phase consistency test, the switch matrix operation process is as follows: Switching the fourth switch to the enable end connected to the power divider, so that the vector network analyzer sends the radio frequency single tone signal to the power divider; The power splitter splits the single-tone signal emitted by the vector network analyzer into a first radio frequency signal and a second radio frequency signal; Switching the first selection switch to the gate end connected to the power divider, and switching the third switch to the gate end connected to the power divider, so that the first radio frequency signal is transmitted along the first selection switch to the mode selection switch, and the second radio frequency signal is transmitted along the third switch to the channel selection switch; The channel selection switch is used to select the current test channel of the digital TR component; The interface selection switch is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

8. A digital TR component automatic testing method, applied to the digital TR component automatic testing system as claimed in claim 1, characterized in that: An automatic launch test method is included, specifically comprising the following steps: S1. Load the test items of transmit phase consistency test and transmit gain test respectively; S2. When the corresponding test item needs to be executed, the switch matrix, digital TR component and digital signal processing device are configured, and a switch action instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component; S3. When the corresponding test item starts to be executed, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment; S4. The automatic test software generates the baseband frequency data required for the digital TR component test and packages the baseband frequency data and sends it to the digital TR component. At the same time, the baseband frequency data is converted into a radio frequency analog signal and sent to the corresponding test equipment through the switch matrix. S5, the digital TR component converts the baseband frequency data into a radio frequency signal, and sends the radio frequency signal to the corresponding test equipment through the switch matrix; S6. The test equipment measures the received RF analog signal and RF signal to obtain the transmission test result; the switch matrix is ​​controlled to switch to each RF port of the digital TR component in turn until the test of all RF ports of the digital TR component is completed.

9. A digital TR component automatic testing method, applied to the digital TR component automatic testing system as claimed in claim 1, characterized in that: An automatic acceptance test method is included, specifically comprising the following steps: S11, loading the test items of the receiving phase consistency test and the receiving gain test respectively; S21. When a corresponding test item needs to be executed, the switch matrix, the digital TR component, and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component; S31, when starting to execute the corresponding test item, sending a port switching instruction for switching the test channel and the test interface to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment; S41, digital TR component and digital signal processing equipment respectively receive the radio frequency signal sent by the test equipment through the switch matrix, and obtain the digital signal after digital processing and output it to the automatic test software; S51. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S31-S41 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

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