CN114070425B - Phased array radio frequency beam pointing switching time testing system and method - Google Patents
Phased array radio frequency beam pointing switching time testing system and method Download PDFInfo
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Abstract
A phased array radio frequency beam directional switching time test system and method belong to the technical field of phased array system test, and solve the problems of inconvenient measurement, complex steps and inaccurate results of the existing radio frequency beam directional switching time test method; mixing the radio frequency signals to zero frequency in the same-frequency mixing mode, converting the phase change of the radio frequency signals which are not easy to observe and measure into amplitude change in the time domain, amplifying the amplitude change through the table multiple of an oscilloscope, intuitively measuring through the oscilloscope, unifying the measurement of beam pointing parameters and the phase change of the radio frequency signals on the oscilloscope, and directly obtaining the radio frequency beam pointing switching time comprising the transmission time of the beam pointing parameters, the calculation time of phase shifting codes, the transmission time of the phase shifting codes and the action time of the phase shifter through measuring the difference of the change time of the beam pointing parameters and the phase change of the radio frequency signals; the adopted instrument equipment and test accessories are conventional equipment and instruments, special test equipment is not required to be designed and manufactured, and the use difficulty and threshold of a test system are reduced.
Description
Technical Field
The invention belongs to the technical field of phased array system testing, and relates to a phased array radio frequency beam pointing switching time testing system and method, which are applied to testing of various civil and military phased array systems.
Background
The phased array system has the advantages of excellent beam scanning instantaneity, and the RF beam directional switching time is quantitatively embodied by adopting the phased array system formed by RF beams. The beam pointing switching time comprises a beam pointing parameter transmission time, a phase shift code calculation time, a phase shift code transmission time, a phase shifter action time and the like, and comprises the measurement of digital signals and radio frequency signals.
An oscilloscope is generally used for testing the time domain characteristics of signals, but the time domain characteristics are limited to digital signals and low-frequency signals, a modulation domain analyzer is required for measuring the change relation of frequency phase relative to time, and the device is relatively lack, and is difficult to measure for special testing comprising digital and radio frequency signals such as beam pointing switching. The existing test method adopts a sectional measurement mode to test the directional switching time of the radio frequency beam, for example, an oscilloscope is used for measuring the time from the transmission of a control signal to the transmission of a phase-shifting signal, the time comprises transmission and calculation time, and a modulation domain analyzer is used for measuring the phase change time of the radio frequency signal. However, this method requires setting signal measurement points between the phase-shift code calculation module and the phase shifter, the signal measurement points are usually located inside the product, the setting is relatively inconvenient, and the measurement is not accurate enough due to omitting part of internal transmission paths.
In the prior art, the Chinese patent application of the invention, namely a signal source test system and method based on a radio frequency switch matrix, with publication date of 2015, 5, 6 and publication number of CN104601254A automatically switches radio frequency channels according to the requirements of test cases, and builds a test environment required by test projects, so that used test resources are reduced, the test flow is simple, and the flexibility of the system is improved; but this document does not address how to test the radio frequency beam pointing switch time.
Disclosure of Invention
The invention aims at designing a phased array radio frequency beam directional switching time testing system and method to solve the problems of inconvenient measurement, complex steps and inaccurate results of the existing radio frequency beam directional switching time testing method.
The invention solves the technical problems through the following technical scheme:
a phased array radio frequency beam pointing switch time test system comprising: the device comprises an upper computer (1), a power divider (2), a mixer (3), a switch matrix (4), a signal source (5), an oscilloscope (6) and a product to be tested (7); the output port of the signal source (5) is connected with the input port of the power divider (2), one path of the output port of the power divider (2) is connected with the input port of the product (7) to be tested, and the other path of the output port of the power divider is connected with the mixer (3); the output port of the product to be tested (7) is correspondingly connected with the input port of the switch matrix (4) according to the port serial number, the output port of the switch matrix (4) is connected with the radio frequency port of the mixer (3), and the intermediate frequency output port of the mixer (3) is connected to the No. 1 port of the oscilloscope (6) by adopting an oscilloscope probe or an SMA/BNC conversion wire; the upper computer (1) is connected with the product (7) to be tested by adopting an R422 interface, and a TX+ or TX-line of the RS422 interface is independently led out and connected to a No. 2 port of the oscilloscope (6); the upper computer (1) is connected with the signal source (5), the oscilloscope (6) and the switch matrix (4) by adopting a network port or a GPIB interface; the upper computer (1) is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product (7) to be tested, sending the parameter information to the product (7) to be tested according to a communication protocol, acquiring the telemetry parameter of the product (7) to be tested, controlling the switch matrix (4) to be switched to a corresponding test channel, and configuring the state parameters of the signal source (5) and the oscilloscope (6); the power divider (2) is used for dividing a test signal into two parts and inputting a product to be tested (7) and the mixer (3) as a test input signal and a mixing local oscillation signal; the mixer (3) is used for mixing an output signal of a product (7) to be tested with a test input signal to generate a zero-frequency signal for testing; the switch matrix (4) is used for switching the test channel to a corresponding channel of a product (7) to be tested according to the instruction of the upper computer (1); the signal source (5) is used for generating a point frequency signal required by the test; the oscilloscope (6) is used for capturing the amplitude variation of the zero frequency signal; collecting data sent by a port of an upper computer (1); the product (7) to be tested works in different working modes according to different instructions; and receiving the beam pointing parameter and the instruction execution time by the upper computer (1), and changing the channel phasor according to the beam pointing parameter and the instruction execution time.
The method adopts the same-frequency mixing mode to mix the radio frequency signals to zero frequency, converts the phase change of the radio frequency signals which are not easy to observe and measure into amplitude change in the time domain, intuitively measures the digital signals which are the beam pointing parameters and the phase change of the radio frequency signals on the oscilloscope after amplifying the wave form multiples of the oscilloscope, directly obtains the radio frequency beam pointing switching time which comprises the beam pointing parameter transmission time, the phase shift code calculation time, the phase shift code transmission time and the phase shifter action time by measuring the difference value of the two changing times; the instrument and the test accessory adopted by the test system are conventional equipment and instruments, special test equipment is not required to be designed and manufactured, and the use difficulty and the threshold of the test system are reduced.
As a further improvement of the technical scheme of the invention, the upper computer (1) comprises: the system comprises an analog data transmitting module, a telemetry module, an instrument parameter configuration module and a test result output module;
the simulation data transmitting module is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product (7) to be tested, encoding the product according to a communication protocol and transmitting the product to be tested (7);
the remote measuring module is used for receiving the working state indication, the channel phase shift code and the abnormal state indication data returned by the product (7) to be measured, decoding the data according to a communication protocol and displaying the data on a test interface of the upper computer (1);
the instrument parameter configuration module is used for configuring the output signal frequency and power of the signal source (5), configuring a state parameter file called by the oscilloscope (6) and controlling the switch matrix (4) to switch to a test channel corresponding to the product (7) to be tested according to the test requirement for channel-by-channel test;
the test result output module is used for reading the test data of the oscilloscope (6) and outputting the test result after operating the test data.
As a further improvement of the technical scheme of the invention, the power divider (2) is a universal one-to-two radio frequency power divider.
As a further improvement of the technical scheme of the invention, the mixer (3) is a passive mixer (3).
As a further improvement of the technical scheme of the invention, the working frequency range of the power divider (2) and the mixer (3) covers the test frequency of the product (7) to be tested.
As a further improvement of the technical scheme of the invention, the switch matrix (4) has the functions of local control and remote control, a tester can manually switch the test channels in the local control state, and the upper computer (1) can switch the test channels one by one in the remote control state for testing.
The testing method applied to the phased array radio frequency beam pointing switching time testing system comprises the following steps of:
the signal source (5) generates a radio frequency signal with the working frequency of the product (7) to be tested, the radio frequency signal is divided into two parts by the power divider (2), one part is used as the local oscillation signal, and the other part is used as the test input signal;
mixing a radio frequency signal output by a product to be detected (7) with the same-frequency signal of the local oscillation signal, and inputting the mixed signal into a mixer (3) so as to obtain a zero-frequency signal;
detecting an RS422 data transmission port signal of the upper computer (1) by an oscilloscope (6) to be used as a test trigger signal source, namely a beam switching starting time mark;
the amplitude jump completion of the zero frequency signal is detected by an oscilloscope (6) to be used as a test ending time, namely a phase shifting action completion mark;
measuring a time interval from the beginning of the first frame signal jump sent by an RS422 data port to the completion of the zero frequency signal amplitude jump through an oscilloscope (6), and obtaining the beam switching time test result of the current channel;
the upper computer (1) controls the switch matrix (4) and the product (7) to be tested, the test is repeated channel by channel, the worst value is taken as the test result of the beam switching time, and the test result is recorded.
The invention has the advantages that:
the method adopts the same-frequency mixing mode to mix the radio frequency signals to zero frequency, converts the phase change of the radio frequency signals which are not easy to observe and measure into amplitude change in the time domain, intuitively measures the digital signals which are the beam pointing parameters and the phase change of the radio frequency signals on the oscilloscope after amplifying the wave form multiples of the oscilloscope, directly obtains the radio frequency beam pointing switching time which comprises the beam pointing parameter transmission time, the phase shift code calculation time, the phase shift code transmission time and the phase shifter action time by measuring the difference value of the two changing times; the instrument and the test accessory adopted by the test system are conventional equipment and instruments, special test equipment is not required to be designed and manufactured, and the use difficulty and the threshold of the test system are reduced.
Drawings
FIG. 1 is a block diagram of a phased array RF beam pointing switching time test system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a phased array RF beam pointing switching time test method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of channel phase change before and after beam pointing switching according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a transmission start flag of beam pointing data and a shift completion flag for converting to zero frequency acquired by a phased array radio frequency beam pointing switching time test according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments:
example 1
As shown in fig. 1, a phased array radio frequency beam pointing switching time test system provided by an embodiment of the present invention includes: the device comprises an upper computer 1, a power divider 2, a mixer 3, a switch matrix 4, a signal source 5, an oscilloscope 6 and a product 7 to be tested.
The output port of the signal source 5 is connected with the input port of the power divider 2 by adopting a radio frequency cable, one path of the output port of the power divider 2 is connected with the input port of the product 7 to be tested by adopting the radio frequency cable, and the other path of the output port of the power divider is connected with the mixer 3 as a local oscillation signal, and is used as an input signal of the product 7 to be tested.
The output port of the product 7 to be tested is connected with the input port of the switch matrix 4 by adopting a radio frequency cable according to the corresponding port serial number; the switch matrix 4 has the functions of local control and remote control; the local control function is used for manually switching the test channel through a key positioned on the panel of the switch matrix 4; the remote control function is used for controlling the switching test channel of the switch matrix 4 by sending an instruction through the upper computer 1; the test device is provided with a graphical interface, and the test channel can be switched by clicking an interface button. The switch matrix 4, each channel switch is a high-power switch, the tolerance power is more than 10W; one end of each channel switch is connected with the power division network, the other end of each channel switch is connected with a high-power load, and the high-power load is provided with a heat dissipation device.
The output port of the switch matrix 4 is connected to the radio frequency port of the mixer 3 by adopting a radio frequency cable, and the intermediate frequency output port of the mixer 3 is connected to the No. 61 oscilloscope or other test ports by adopting an oscilloscope 6 probe or an SMA/BNC conversion wire.
The upper computer 1 and the product 7 to be tested are connected by adopting an R422 interface, and if the upper computer 1 does not have an RS422 port, the upper computer 1 can be switched by adopting a USB-RS 422 adapter. In addition, the tx+ or TX-line of the RS422 interface needs to be separately led out and used as a test trigger signal to be connected to the oscilloscope 62 or other test ports.
The upper computer 1 is connected with the signal source 5, the oscilloscope 6 and the switch matrix 4 by adopting a network port or a GPIB interface.
The power divider 2 can be selected from various general one-to-two radio frequency power dividers 2, and the working frequency range of the power divider 2 needs to cover the test frequency; the mixer 3 is a passive mixer 3, and the working frequency range of the mixer 3 needs to cover the test frequency; the switch matrix 4 is used for phased array multichannel repeated test, reduces the repeated time-consuming work of manually replacing the cable of the test channel during repeated test, and can not make forced requirements if channels are fewer and cost-saving requirements exist.
The upper computer 1 is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product 7 to be tested, and sending the parameter information to the product 7 to be tested according to a communication protocol; obtaining telemetry parameters of the product 7 to be tested; the control switch matrix 4 is switched to the corresponding test channel; configuring state parameters of the signal source 5 and the oscilloscope 6;
the power divider 2 is used for dividing a test signal into two parts, and inputting a product 7 to be tested and the mixer 3 to be used as a test input signal and a mixing local oscillation signal;
the mixer 3 is used for mixing an output signal of the product 7 to be tested with a test input signal to generate a zero frequency signal for testing; the phase change of the output signal of the product 7 to be measured is converted into a time domain amplitude change which can be measured by an oscilloscope 6 through a mixer 3.
The switch matrix 4 is used for switching the test channel to the corresponding channel of the product 7 to be tested according to the instruction of the upper computer 1;
the signal source 5 is used for generating a point frequency signal required by the test;
the oscilloscope 6 is used for capturing the amplitude variation of the zero-frequency signal; collecting data sent by a port 1 of an upper computer;
the product 7 to be tested works in different working modes according to different instructions; and receiving the beam pointing parameter and the instruction execution time by the upper computer 1, and changing the channel phasor according to the beam pointing parameter and the instruction execution time.
The upper computer 1 contains test software for controlling the test instrument, the matrix and the switch matrix 4, and can be used for configuring relevant parameters of the test instrument, the switch matrix 4 and the product 7 to be tested; the method can also be used for acquiring telemetry state data of the product 7 to be tested; the method can also be used for collecting test data generated by a test instrument and calculating a test result. The test software can be developed by adopting a C language, and the upper computer 1 and the product 7 to be tested are remotely controlled and measured by adopting a 4-wire full duplex RS422 interface and an asynchronous communication mode through a point-to-point communication transmission protocol; the upper computer 1, the switch matrix 4 and the testing instrument pass through a user datagram protocol, and the upper computer 1 can set instrument and matrix parameters, acquire testing data and calculate a testing result.
The host computer 1 includes: the system comprises an analog data transmitting module, a remote measuring module, an instrument parameter configuration module and a test result output module.
The analog data transmitting module is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product 7 to be tested, encoding according to a communication protocol, transmitting the encoded data to the product 7 to be tested through the RS422 interface, and calculating the phase shift code of the product 7 to be tested according to the beam control instruction.
And the telemetry module receives the working state indication, the channel phase shift code and the abnormal state indication data which are periodically returned by the product 7 to be tested for 17 seconds through the RS422 interface, decodes the data according to the communication protocol and displays the data on the test interface of the upper computer 1.
The instrument parameter configuration module can set the output signal frequency, power and switching state of the signal source 5 and the state parameter file called by the oscilloscope 6 according to the working frequency requirement of the product 7 to be tested; the channel state of the switch matrix 4 can be controlled, and after the current test channel is completed, the channels are switched to other unmeasured channels one by one to carry out channel-by-channel test; before the test starts, the state parameter file called by the oscilloscope 6 needs to be set according to the debugging state of the used oscilloscope 6 channel and the product 7 to be tested, and then stored as the state file required by the test.
The test result output module can be used for reading the measurement data of the oscilloscope 6, including the trigger time and the phase shift action completion time, calculating the difference value of the trigger time and the phase shift action completion time as the switching time test data record of the current channel, and taking the worst value output as the test result after repeated channel-by-channel test. Meanwhile, the test result displayed by the oscilloscope 6 during the test of each channel is subjected to screenshot and saved, and is used as an original record for a user to check after the test is completed.
As shown in fig. 2, the phased array radio frequency beam pointing switching time testing method provided by the embodiment of the invention includes the following steps:
step S1, configuring the working mode of the product 7 to be tested, the test channel of the switch matrix 4 and the state parameters of the test instrument.
Before the parameters are configured, the upper computer 1, the signal source 5, the oscilloscope 6, the switch matrix 4 and the product 7 to be tested can be connected according to the phased array radio frequency beam directional switching time testing system shown in fig. 1.
After the connection of the upper computer 1, the signal source 5, the oscilloscope 6, the switch matrix 4 and the product 7 to be tested is completed, the test software of the upper computer 1 is opened, the power supplies of the upper computer 1, the signal source 5, the oscilloscope 6, the switch matrix 4 and the product 7 to be tested are opened, and whether the connection states of the upper computer 1, the signal source 5, the oscilloscope 6 and the switch matrix 4 are normal can be checked through the hardware driving module of the upper computer 1.
After confirming that the connection state is normal, the instrument parameter configuration module is utilized to set the output frequency, the output power and the switch state of the signal source 5 according to the test parameters of the product 7 to be tested, initialize the switch matrix 4, set or call the configuration parameters or files of the oscilloscope 6, complete the setting of the relevant instrument equipment to be tested, and ensure the safety of the product 7 to be tested and the instrument equipment.
The working mode of the product 7 to be tested can be configured by using the analog data sending module of the test software, and whether the working mode of the product 7 to be tested is set correctly is checked by the telemetry module.
Step S2, an initial beam pointing angle of the product 7 to be tested is configured.
After the setting of the working mode of the product 7 to be tested is completed, in the analog data transmitting module of the test software, the corresponding working mode is used to set the beam pointing angle of the product 7 to be tested as an initial angle, which can be defined as (0 degree ) or other angles with a certain deviation from the pointing angle for subsequent measurement. When the initial beam pointing angle is transmitted, the execution interval time information is also required to be filled in, and the reservation of sufficient time is recommended for the test software to complete the transmission of the initial beam pointing angle.
And step S3, transmitting the switched beam pointing angle and execution time, and setting single trigger of the oscilloscope 6.
In the analog data transmitting module of the test software, filling in the expected beam pointing switching angle and the beam switching execution interval time, clicking the start test button, and setting the oscilloscope 6 to a single-shot mode by the instrument parameter configuration module of the test software.
After the test is started, the execution time is calculated by the simulation data transmitting module of the test software in the test software, and the beam pointing angle and the execution time are transmitted to the product 7 to be tested.
Step S4, the oscilloscope 6 captures the data transmission starting time, measures the phase shifting action finishing time and calculates the channel beam switching time.
The oscilloscope 6 captures the data information sent by the RS422 interface TX +/-pin between the upper computer 1 and the product 7 to be tested to complete triggering, as shown in figure 4, namely the wave beam points to the data sending starting time, and the test result output module of the upper computer 1 is marked as T 1 。
The change of the channel phase before and after the current test channel phase shifting in the frequency domain is shown in fig. 3, after the channel phase is mixed to zero frequency and converted to the time domain, the amplitude jump of the zero frequency signal is measured by the oscilloscope 6, as shown in fig. 4, the jump time is the phase shifting action completion time, and the test result output module of the upper computer 1 is recorded as T 2 。
The current channel beam switching time is calculated by the upper computer 1 test result output module to be T 2 -T 1 And saving the graph screenshot on the oscilloscope 6 to the upper computer 1, and naming the graph screenshot as the name of the current test channel.
And S5, taking the 7-beam switching time of the product to be tested with the worst value, and ending the test.
And carrying out channel-by-channel test on the product 7 to be tested, recording the beam switching time of each channel by a test result output module of the upper computer 1, and storing a test chart. And after all the channels are measured, taking the worst value as the beam switching time of the product 7 to be measured, and completing the test.
The invention adopts the same frequency mixing mode to mix the radio frequency signal to zero frequency, converts the phase change of the radio frequency signal which is not easy to observe and measure into the amplitude change on the time domain, and can be intuitively measured through the oscilloscope after the amplification of the pen-shaped multiple of the oscilloscope. The instrument and the test accessory adopted by the test system are conventional equipment and instruments, special test equipment is not required to be designed and manufactured, and the use difficulty and the threshold of the test system are reduced. The testing system and the testing method have the advantages that the measurement of the digital signal of the beam pointing parameter and the measurement of the phase change of the radio frequency signal are unified on the oscilloscope, and the radio frequency beam pointing switching time comprising the transmission time of the beam pointing parameter, the calculation time of the phase shift code, the sending time of the phase shift code and the action time of the phase shifter is directly obtained by measuring the difference value of the change time of the digital signal and the phase change of the radio frequency signal.
The test system adopts common measuring instrument equipment to convert the phase time relation of the radio frequency signals into the amplitude time relation; the oscilloscope 6 is used for observing the digital signal and the converted phase conversion signal, so that the use is convenient; the universal measuring instrument equipment is used as the testing equipment, and special testing equipment is not needed; by designing a method for combining and measuring three different time quantities of digital signal transmission time, pointing angle calculation time and radio frequency beam pointing switching, an original sectional measurement mode is replaced, a test interface is not required to be prefabricated or temporarily refitted in the product 7 to be tested, and test precision is improved. The repeated test of the channel is controlled by the upper computer 1, and the directional switching time of the phased array radio frequency beam is measured in a wired stage.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A phased array radio frequency beam pointing switch time test system, comprising: the device comprises an upper computer (1), a power divider (2), a mixer (3), a switch matrix (4), a signal source (5), an oscilloscope (6) and a product to be tested (7); the output port of the signal source (5) is connected with the input port of the power divider (2), one path of the output port of the power divider (2) is connected with the input port of the product (7) to be tested, and the other path of the output port of the power divider is connected with the mixer (3); the output port of the product to be tested (7) is correspondingly connected with the input port of the switch matrix (4) according to the port serial number, the output port of the switch matrix (4) is connected with the radio frequency port of the mixer (3), and the intermediate frequency output port of the mixer (3) is connected to the No. 1 port of the oscilloscope (6) by adopting an oscilloscope probe or an SMA/BNC conversion wire; the upper computer (1) is connected with the product (7) to be tested by adopting an RS422 interface, and a TX+ or TX-line of the RS422 interface is independently led out and connected to a No. 2 port of the oscilloscope (6); the upper computer (1) is connected with the signal source (5), the oscilloscope (6) and the switch matrix (4) by adopting a network port or a GPIB interface; the upper computer (1) is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product (7) to be tested, sending the parameter information to the product (7) to be tested according to a communication protocol, acquiring the telemetry parameter of the product (7) to be tested, controlling the switch matrix (4) to be switched to a corresponding test channel, and configuring the state parameters of the signal source (5) and the oscilloscope (6); the power divider (2) is used for dividing a test signal into two parts and inputting a product to be tested (7) and the mixer (3) as a test input signal and a mixing local oscillation signal; the mixer (3) is used for mixing an output signal of a product (7) to be tested with a test input signal to generate a zero-frequency signal for testing; the switch matrix (4) is used for switching the test channel to a corresponding channel of a product (7) to be tested according to the instruction of the upper computer (1); the signal source (5) is used for generating a point frequency signal required by the test; the oscilloscope (6) is used for capturing the amplitude variation of the zero frequency signal; collecting data sent by a port of an upper computer (1); the product (7) to be tested works in different working modes according to different instructions; and receiving the beam pointing parameter and the instruction execution time by the upper computer (1), and changing the channel phasor according to the beam pointing parameter and the instruction execution time.
2. A phased array radio frequency beam pointing switching time testing system according to claim 1, wherein said host computer (1) comprises: the system comprises an analog data transmitting module, a telemetry module, an instrument parameter configuration module and a test result output module;
the simulation data transmitting module is used for configuring the working mode, the beam pointing parameter and the instruction execution time of the product (7) to be tested, encoding the product according to a communication protocol and transmitting the product to be tested (7);
the remote measuring module is used for receiving the working state indication, the channel phase shift code and the abnormal state indication data returned by the product (7) to be measured, decoding the data according to a communication protocol and displaying the data on a test interface of the upper computer (1);
the instrument parameter configuration module is used for configuring the output signal frequency and power of the signal source (5), configuring a state parameter file called by the oscilloscope (6) and controlling the switch matrix (4) to switch to a test channel corresponding to the product (7) to be tested according to the test requirement for channel-by-channel test;
the test result output module is used for reading the test data of the oscilloscope (6) and outputting the test result after operating the test data.
3. The phased array radio frequency beam pointing switching time testing system according to claim 1, wherein the power divider (2) is a universal one-to-two radio frequency power divider.
4. A phased array radio frequency beam pointing switching time test system as claimed in claim 3 wherein the mixer (3) is a passive mixer (3).
5. A phased array radio frequency beam pointing switching time test system as claimed in claim 4, wherein the operating frequency range of the power divider (2) and mixer (3) covers the test frequency of the product (7) under test.
6. The phased array radio frequency beam pointing switching time test system according to claim 1, wherein the switch matrix (4) has a local control function and a remote control function, the test channels are manually switched by a tester in the local control state, and the test is performed by switching channel by the upper computer (1) in the remote control state.
7. A test method applied to the phased array radio frequency beam pointing switching time test system of any one of claims 1-6, comprising the steps of:
the signal source (5) generates a radio frequency signal with the working frequency of the product (7) to be tested, the radio frequency signal is divided into two parts by the power divider (2), one part is used as the local oscillation signal, and the other part is used as the test input signal;
mixing a radio frequency signal output by a product to be detected (7) with the same-frequency signal of the local oscillation signal, and inputting the mixed signal into a mixer (3) so as to obtain a zero-frequency signal;
detecting an RS422 data transmission port signal of the upper computer (1) by an oscilloscope (6) to be used as a test trigger signal source, namely a beam switching starting time mark;
the amplitude jump completion of the zero frequency signal is detected by an oscilloscope (6) to be used as a test ending time, namely a phase shifting action completion mark;
measuring a time interval from the beginning of the first frame signal jump sent by an RS422 data port to the completion of the zero frequency signal amplitude jump through an oscilloscope (6), and obtaining the beam switching time test result of the current channel;
the upper computer (1) controls the switch matrix (4) and the product (7) to be tested, the test is repeated channel by channel, the worst value is taken as the test result of the beam switching time, and the test result is recorded.
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