Radio integrated test module

Abstract

The invention relates to the technical field of radio testing, in particular to a radio comprehensive testing module which comprises a radio frequency excitation unit, a power consumption detection unit, a directional testing unit and an upper computer interface. The radio frequency excitation unit is used for generating a radio frequency signal with consistent carrier frequency and modulation characteristic, and measuring the amplitude, distortion degree and signal-to-noise ratio of the radio frequency signal; the power consumption detection unit is used for supplying power to the detected equipment, detecting the working voltage, the working current and the power consumption of the detected equipment and uploading the working voltage, the working current and the power consumption to the upper computer; the directional test unit comprises a multi-stage power divider, and the multi-stage power divider receives radio frequency signals and generates three paths of same-frequency signals; and the upper computer interface is used for receiving an upper computer instruction and returning test data. The system has multiple functions of power consumption detection, AM / FM function performance test, broadband signal receiving and transmitting function, directional function test, spectrum analysis and the like, and high-efficiency integrated test is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of radio testing, and particularly to a radio comprehensive test module. Background Art

[0002] A radio comprehensive tester is a device used for radio testing. This device incorporates more than a dozen testing instruments such as a radio frequency synthesizer source, a spectrum analyzer, and a power meter, and can perform duplex testing and various radio parameter tests on wireless communication equipment. In the field of radio communication, accurately testing the performance indicators of the device under test is the key to ensuring communication quality. Traditional testing methods often require the use of multiple independent testing instruments, which are not only complex to operate but also have low testing efficiency. Therefore, it is particularly important to develop a convenient comprehensive test module that can integrate multiple testing functions. Summary of the Invention

[0003] The present invention proposes a radio comprehensive test module, which can perform various functions such as power consumption detection, AM / FM function performance testing, broadband signal reception and transmission function, directional function testing, and spectrum analysis, and can achieve a comprehensive test of the device under test.

[0004] To achieve the above object, the following technical solutions are proposed:

[0005] A radio comprehensive test module includes a radio frequency excitation unit, a power consumption detection unit, a directional test unit, and a host computer interface;

[0006] Includes a radio frequency excitation unit, a power consumption detection unit, a directional test unit, and a host computer interface;

[0007] The radio frequency excitation unit is used to generate radio frequency signals with consistent carrier frequencies and modulation characteristics;

[0008] The power consumption detection unit is used to detect the working voltage, working current, and power consumption of the device under test and upload them to the host computer;

[0009] The directional test unit includes a multi-stage power divider, and the multi-stage power divider receives radio frequency signals and generates three paths of co-frequency signals;

[0010] The host computer interface is used to receive host computer instructions and return test data.

[0011] Preferably, it further includes an electro-acoustic loudspeaker, a radio frequency analysis module, an audio unit, and a digital unit;

[0012] The loudspeaker is used to receive the test audio output by the audio unit;

[0013] The radio frequency analysis module is used to measure the amplitude, distortion degree, and signal-to-noise ratio of radio frequency signals;

[0014] The audio unit is used to transmit audio to the device under test and receive the audio of the device under test, and output the test audio to the speaker.

[0015] The digital unit is used to process the BPSK / QPSK signals input and output by the RF excitation unit.

[0016] Preferably, the specific steps for the multi-stage power divider to receive the RF signal and generate three co-frequency signals include:

[0017] The host computer controls the RF excitation unit to generate an RF signal through the host computer interface, and the RF signal is output to the directional test unit; the directional test unit divides the RF signal into three co-frequency signals through the multi-stage power divider.

[0018] Preferably, the amplitudes and relative phases of the three co-frequency signals are adjusted by the host computer.

[0019] Preferably, the steps for the RF excitation unit to generate an RF signal include:

[0020] Generate a first modulation signal through a digital frequency synthesizer. After the first modulation signal is attenuated by a first electrically tunable attenuator, it is mixed with a first local oscillator signal through a first mixer to obtain a second modulation signal;

[0021] After the second modulation signal is amplified by a first amplifier and filtered by a first filter, it is input to a second mixer to be mixed with a second local oscillator signal, and then is conditioned by two-stage controllable digital attenuators and two-stage amplification switching circuits to output an RF signal.

[0022] Preferably, the first electrically tunable attenuator is composed of two diodes.

[0023] Preferably, the specific steps for the directional test unit to divide the RF signal into three co-frequency signals through the multi-stage power divider include:

[0024] S31: The RF signal is input to the first-stage power divider to be divided into a first signal and a second signal. After the first signal passes through a one-stage amplification attenuation switching circuit, it is output from the main RF input / output port, and the second signal is input to the second-stage power divider;

[0025] S32: The second-stage power divider divides the second signal into a third signal and a fourth signal. After the third signal passes through a one-stage amplification attenuation switching circuit, it is output from the CR RF output port. After the fourth signal compensates for the insertion loss of the second-stage power divider through a first amplifier, it is input to the third-stage power divider;

[0026] S33: The third-stage power divider divides the fourth signal into a fifth signal and a sixth signal. The fifth signal is input to a one-stage programmable attenuator and then to a one-stage balun to output a seventh signal and an eighth signal, which are output from the NS RF output port.

[0027] Preferably, the first signal and the second signal have the same frequency, amplitude, and phase;

[0028] The third signal and the fourth signal have the same frequency, amplitude, and phase;

[0029] The fifth signal and the sixth signal have the same frequency, amplitude, and phase;

[0030] The first signal and the third signal have the same amplitude and frequency; the seventh signal and the eighth signal have the same amplitude and a phase difference of 180 degrees.

[0031] Preferably, the sixth signal is input into a first-stage programmable attenuator and then output from the EW RF output port after passing through a first-stage balun.

[0032] Preferably, the sixth signal and the third signal have the same frequency, and the seventh signal, the eighth signal, and the third signal have the same frequency.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: The radio comprehensive test module of the present invention integrates multiple functions such as power consumption detection, broadband signal reception and transmission functions, directional function testing, and spectrum analysis, and can meet the comprehensive test requirements for the device under test; at the same time, through the control of the host computer, the test operation is simplified and the test efficiency is improved. Description of the Drawings

[0034] Figure 1 is a module diagram of a radio comprehensive test module in Embodiment 1;

[0035] Figure 2 is a block diagram of the overall hardware principle of a radio comprehensive test module in Embodiment 1;

[0036] Figure 3 is a circuit schematic diagram of the directional function of the radio comprehensive test module in Embodiment 1;

[0037] Figure 4 is a circuit schematic diagram of the directional function of the radio comprehensive test module in Embodiment 1;

[0038] Figure 5 is the soft panel spectrum analysis interface of the radio comprehensive test module in Embodiment 2. Detailed Embodiments

[0039] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0040] In addition, expressions such as "first", "second", "third", etc. appearing in the terms are only used to distinguish the descriptions of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0041] In addition, in the description of the embodiments of the present invention, "several", "multiple", and "a number of" represent at least 2. It can be any case such as 2, 3, 4, 5, 6, 7, 8, 9, etc., or even more than 9.

[0042] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, where the terms "set", "installed", "connected", "coupled", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0043] Embodiment 1

[0044] As Figure 1 shown, this embodiment provides a radio comprehensive test module, including a radio frequency excitation unit, a power consumption detection unit, a directional test unit, and a host computer interface;

[0045] The radio frequency excitation unit is used to generate radio frequency signals with consistent carrier frequencies and modulation characteristics, and measure the amplitude, distortion degree, and signal-to-noise ratio of the radio frequency signals;

[0046] The power consumption detection unit is used to supply power to the device under test, and at the same time detect the working voltage, working current, and power consumption of the device under test and upload them to the host computer;

[0047] The directional test unit includes a multi-stage power divider, and the multi-stage power divider receives radio frequency signals and generates three co-frequency signals;

[0048] The host computer interface is used to receive host computer instructions and return test data.

[0049] Furthermore, the radio comprehensive test module further includes a power supply unit, a speaker, an audio unit, and a digital unit;

[0050] The power supply unit is used to supply power to the device under test;

[0051] The audio unit is used to transmit audio to the device under test and receive the audio of the device under test, and output test audio to the speaker;

[0052] The speaker is used to receive the test audio output by the audio unit;

[0053] The digital unit is used to process BPSK (Binary Phase Shift Keying) / QPSK (Quadrature Phase Shift Keying) signals input and output by the radio frequency excitation unit.

[0054] Please refer to Figure 2 , as a specific embodiment, QF6916 is used as a radio comprehensive test module. A 28V DC power supply supplies power to the device under test through a radio comprehensive test module of QF6916. QF6916 measures the power consumption of the device under test and reports it to the host computer in real time through the 1XS1 network interface. This embodiment Figure 2 For the interface type, please refer to Table 1.

[0055] Table 1 Interface Types and Functions

[0056]

[0057]

[0058] It should be noted that the outputs of Panel RF 1, Panel RF 2, Panel RF 3, and Panel RF 4 in the figure come from the same RF source, and they have the same carrier frequency and modulation characteristics.

[0059] Furthermore, QF6916 can work in the following test modes: a) mode and any one of b) - e). In mode b), the test module can perform receiver index tests or transmitter index tests.

[0060] a) Power consumption detection function of the device under test

[0061] Provide a working power supply for the device under test, and detect the working voltage, working current, and power consumption of the device under test. When the host computer issues a query command, the detection data results will be uploaded to the host computer through the data interface 1XS1.

[0062] b) AM / FM function performance test:

[0063] AM / FM receiver index test of the device under test: After the host computer sends a function selection instruction through the 1XS1 port, under the control of the host computer, a modulated RF signal (with controllable amplitude) of the corresponding frequency and modulation depth / frequency deviation is output to the 1XS2 and 1XS6 ports as required. This signal comes from the same RF source. At the same time, after the audio signal sent by the device under test is input from the 1XS11 port, amplitude, distortion, and signal-to-noise ratio measurements are performed, and the measurement results are returned to the host computer through the 1XS1; at the same time, this audio signal is sent to the speaker through the 1XS3.

[0064] AM / FM Transmitter Index Test of the Device Under Test: After the host computer sends a function selection instruction through the 1XS1 port, it outputs audio (through 1XS11) to the device under test as required (frequency and amplitude) under the control of the host computer. The device under test modulates this audio to the corresponding carrier wave and then sends it into the test module through the 1XS2 port. The test module measures the power of this signal, conducts spectrum analysis and modulation analysis, and at the same time demodulates the audio (AM / FM). On the one hand, it sends the results of the radio frequency test to the host computer through 1XS1, and on the other hand, it sends the demodulated audio to the speaker through 1XS3.

[0065] Wideband Signal Reception Function: It can receive BPSK / QPSK signals (signal bandwidth 2.5MHz) sent through 1XS2. After frequency conversion and power control, it outputs the intermediate frequency to the digital unit through 1XS4 (wideband input signal 0dBm~47dBm, 80MHz~680MHz, output intermediate frequency -30dBm~0dBm, 21.4MHz).

[0066] c) Wideband Signal Transmission Function (Transmission Test): It can mix the BPSK / QPSK signals (21.4MHz, amplitude -6dBm) sent into by the digital unit through 1XS5 to the specified frequency (requiring EVM to be less than or equal to 4%), and under the control of the host computer, output corresponding amplitude signals to both 1XS2 and 1XS6 ports at the same time (the signal contents of the two ports are the same, the amplitude difference <3dB, the output amplitudes are adjustable respectively, and the adjustment range is from -120dBm to 8dBm).

[0067] Among them, EVM can be guaranteed by hardware. By adjusting the amplitude of the input signal to the optimal level of the input mixer, configuring the phase noise of the local oscillator, and the corresponding digital converter, the best EVM test results can be obtained.

[0068] 1. Nonlinear components (such as mixers and amplifiers) in the radio frequency frequency conversion path may generate distortion under certain conditions. When a high-power signal is input to a mixer or amplifier, this signal will cause input distortion. We adjust the amplitude of the input signal to the amplitude range required for the best performance of each stage of amplifier or mixer, reducing its nonlinear distortion.

[0069] 2. Select an AD converter with a high SNR. If the SNR is low, it will cause the EVM and adjacent channel power ratio performance measured by the transmitter to be relatively poor, thus unable to accurately display the performance of the device under test. Therefore, the signal-to-noise ratio (SNR) of the analog-to-digital converter selected in this project is 0.0123%, which is much lower than the 4% requirement of this project.

[0070] 3. Optimize the phase noise. The phase noise describes the frequency stability of the oscillator. It is the noise spectrum around the oscillator signal in the frequency domain. Phase noise will cause errors in the phase component of the error vector and is one of the reasons for the EVM test error. After optimization, the phase noise of the local oscillator source selected for this project can reach -100 dBc / Hz@20 kHz, reducing the impact on the EVM of the RF hardware path to the minimum.

[0071] d) Directional function test (transmission test): Used to test the functional performance of the direction finder. The host computer controls the RF exciter through 1XS1 to generate an RF signal, which is output to the directional test unit. The directional test unit then divides the 1-way RF signal into 3-way (1XS6, 1XS7, 1XS8) RF signals of the same frequency through a power divider. The host computer can issue control commands through 1XS1 to change the amplitude and relative phase of the 3-way RF signals. The phase-amplitude control requirements of the directional test unit are shown in Table 2.

[0072] Table 2 Phase-amplitude control requirements of the directional test unit

[0073]

[0074]

[0075] The generation process of the RF signal includes: generating a first modulation signal through a digital frequency synthesizer. After being attenuated by a first electronically tunable attenuator, the first modulation signal is mixed with a local oscillator signal through a first mixer to obtain a second modulation signal.

[0076] After being amplified by a first amplifier and filtered by a first filter, the second modulation signal is input to a second mixer to be mixed with a second local oscillator signal, and then is conditioned by two-stage controllable digital attenuators and two-stage amplification switching circuits to output an RF signal.

[0077] Then, the RF signal is input to a first-stage power divider to be divided into a first signal and a second signal. After passing through a one-stage amplification-attenuation switching circuit, the first signal is output from the main RF input / output port, and the second signal is input to a second-stage power divider.

[0078] The second-stage power divider divides the second signal into a third signal and a fourth signal. After passing through a one-stage amplification-attenuation switching circuit, the third signal is output from the CR RF output port. After the fourth signal is input to a first amplifier to compensate for the insertion loss of the second-stage power divider, it is input to a third-stage power divider.

[0079] The third-stage power divider divides the fourth signal into a fifth signal and a sixth signal. After passing through a one-stage programmable attenuator, the fifth signal is input to a one-stage balun to output a seventh signal and an eighth signal, which are output from the NS RF output port.

[0080] The frequencies, amplitudes, and phases of the first signal and the second signal are the same;

[0081] The frequencies, amplitudes, and phases of the third signal and the fourth signal are the same;

[0082] The frequencies, amplitudes, and phases of the fifth signal and the sixth signal are the same;

[0083] The amplitudes and frequencies of the first signal and the third signal are consistent; the amplitudes of the seventh signal and the eighth signal are the same, and the phase difference is 180 degrees.

[0084] As a specific application, three in-phase signals can simulate a directional antenna to test an airborne direction finder. Different amplitude and phase states of the three in-phase signals can simulate the reception of signals from different directions by the directional antenna, replacing the directional antenna and directly inputting it into the backend airborne direction finder. It can be used to check whether the test of the signal direction by the airborne direction finder is normal.

[0085] As a specific embodiment, as Figure 3 and Figure 4 shown, a fixed modulation signal of 171 MHz with -4 dBm is generated by AD9910 (D11). After passing through a switch to select the broadband and narrowband circuits, it passes through an electronically tunable attenuator composed of V7, 8 (HSMP3814) and resistors and capacitors to adjust the amplitude of 171 MHz (attenuating 10 - 20 dB), and then is mixed with the local oscillator signal of 2321 MHz through mixer N28 (MCA1-42+) to obtain a 2492 MHz signal. The 2492 MHz signal is amplified by amplifier ERA-3SM (N30) and filtered by filters SBP9388L (F19, 20) and then sent to a second mixer for mixing. The local oscillator signal of the second mixer is 2572 - 4179 MHz. After mixing with the 2492 MHz intermediate frequency signal, signals of 80 MHz - 678 MHz and 1.6 GHz - 1.687 GHz can be obtained. Finally, after being conditioned by two-stage controllable digital attenuators PE4312 (D14, 15) and two-stage amplification and switching circuits, a signal of -120 dBm to +8 dBm is obtained as the output.

[0086] The RF signal generated by the pre-stage (the frequency and amplitude can be controlled by the soft panel) enters the power divider T2 (TWPD22M25G35), and is divided into two signals with the same frequency, amplitude, and phase. The signal output from the 1XS2 port only passes through the T2 power divider, and the signal output from the 1XS6 port passes through the T2 and T3 power dividers. An attenuator with a 3 dB attenuation is added to the 1XS2 path to balance the amplitude difference between the 1XS2 and 1XS6 ports. After one of the paths is attenuated by 3 dB, it passes through a first-stage amplification and attenuation switching circuit and is output from the main RF input / output port (1XS2). The other path enters the second-stage power divider T3 (TWPD22M25G35). After passing through the T3 power divider, one path goes to the 1XS6 port, and the other path passes through a first-stage amplifier to compensate for the insertion loss of the subsequent power divider T4, and then passes through the third-stage power divider T4 and is respectively conditioned and output from 1XS7 and 1XS8.

[0087] The second-stage power divider T3 outputs two signals with the same frequency, amplitude, and phase. One of the paths passes through a first-stage amplification and attenuation switching circuit and is output from the CR RF output port (1XS6). Its amplitude and frequency are the same as those of the signal output from the 1XS2 port and can be used for life-saving radio testing. The other path passes through a first-stage amplifier to compensate for the insertion loss of the T3 power divider and then goes to the third-stage power divider T4 (TWPD22M25G35).

[0088] The fourth-stage power divider T4 outputs two signals with the same frequency, amplitude, and phase. One of the paths passes through a first-stage programmable attenuator (programmable adjustment of 0 - 31 dB attenuation), and then passes through a first-stage balun to become two signals with the same amplitude and a phase difference of 180 degrees. These two signals are output from the NS RF output port (1XS7) through a 1-of-2 switch. This path of signal can become a signal with the same frequency as that of the CR port, an amplitude change of 0 to -30 dB, and the same or a phase difference of 180° compared with the CR port.

[0089] The other path of the signal output from the fourth-stage power divider T4 follows the same path as the signal of the NS port and is output from the EW RF output port (1XS8). This path of signal can also become a signal with the same frequency as that of the CR port, an amplitude change of 0 to -30 dB, and the same or a phase difference of 180° compared with the CR port.

[0090] Embodiment 2

[0091] The present invention will be further described in detail below in combination with test examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0092] This embodiment is a specific implementation scheme of a radio comprehensive test module in embodiment 1. When the user clicks the harmonic test button, the soft panel will automatically display the frequency and amplitude values ​​of the second harmonic and third harmonic of the current center frequency. The steps of harmonic analysis acquisition are automatically controlled by the software and do not require user settings. This function can test the second and third harmonics of the test frequency required by the user with one click, solving the pain point of the numerous harmonic test steps for users.

[0093] As a specific embodiment, Figure 5 As shown in the figure, in the spectrum analysis mode of the QF6916 integrated test module, the instrument will analyze the input RF signal. When the RF signal is input from the RF port, the input signal frequency is set to the center frequency of the QF6916 spectrum analysis mode. The signal is sampled by the ADC and converted into data, which is then transmitted to the software end. The software end processes the data for external reading. The data to be read includes the frequency and amplitude at the current center frequency, and the frequency and amplitude of the second and third harmonics of the current center frequency.

[0094] The working parameters of the spectrum analysis mode are initialized to the following configuration: center frequency is 500MHz, span is 100kHz, start frequency is 499.95MHz, cutoff frequency is 500.05MHz, and reference level is 0dBm.

[0095] Parameter settings: center frequency, span, start frequency, and end frequency settings for spectrum analysis;

[0096] Display settings: reference level, Y-axis scale, punctuation (main peak, positioning) settings;

[0097] Furthermore, the steps for obtaining harmonic analysis include: clicking the harmonic test button, the software first tests the carrier amplitude of the current frequency, then automatically switches the center frequency to twice the frequency of the current carrier, tests the amplitude of the second harmonic, and then automatically switches the center frequency to three times the frequency of the carrier, tests the amplitude of the third harmonic, and after the test is completed, the center frequency is automatically switched back to the original frequency point, and the frequency and amplitude values ​​of the carrier, second harmonic, and third harmonic are displayed on the soft panel.

[0098] Finally, it should be noted that the embodiments described in detail above are only the best practices of the invention and cannot be used to limit the scope of rights of the invention. Equivalent replacement of the technical solutions recorded in the aforementioned embodiments does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the invention, and they should all be included in the scope of the claims and description of the invention.

Claims

1. A radio comprehensive test module, characterized in that, It includes a radio frequency excitation unit, a power consumption detection unit, a directional test unit, and a host computer interface; The radio frequency excitation unit is used to generate radio frequency signals with consistent carrier frequencies and modulation characteristics; The power consumption detection unit is used to detect the working voltage, working current, and power consumption of the device under test and upload them to the host computer; The directional test unit includes a multi-stage power divider. The multi-stage power divider receives radio frequency signals and generates three co-frequency signals, which are used to simulate a directional antenna; The host computer interface is used to receive host computer instructions and return test data.

2. The radio comprehensive test module according to claim 1, characterized in that It also includes an electro-acoustic speaker, a radio frequency analysis module, an audio unit, and a digital unit; The speaker is used to receive the test audio output by the audio unit; The radio frequency analysis module is used to measure the amplitude, distortion degree, and signal-to-noise ratio of radio frequency signals; The audio unit is used to transmit audio to the device under test and receive the audio of the device under test, and output test audio to the speaker; The digital unit is used to process BPSK / QPSK signals input and output by the radio frequency excitation unit.

3. A radio comprehensive test module according to claim 1, characterized in that, The specific steps for the multi-stage power divider to receive radio frequency signals and generate three co-frequency signals include: The host computer controls the radio frequency excitation unit to generate radio frequency signals through the host computer interface. The radio frequency signals are output to the directional test unit; the directional test unit divides the radio frequency signals into three co-frequency signals through the multi-stage power divider.

4. The radio comprehensive test module according to claim 3, characterized in that, The amplitude and relative phase of the three co-frequency signals are adjusted by the host computer.

5. The radio comprehensive test module according to claim 3, characterized in that, The steps for the radio frequency excitation unit to generate radio frequency signals include: Generate a first modulation signal through a digital frequency synthesizer. The first modulation signal is attenuated by a first electrically tunable attenuator and then mixed with a first local oscillator signal through a first mixer to obtain a second modulation signal; The second modulation signal is amplified by a first amplifier and enters a first filter for filtering, then is input to a second mixer to be mixed with a second local oscillator signal, and then is conditioned by two-stage controllable digital attenuators and two-stage amplification switching circuits to output radio frequency signals.

6. The radio comprehensive test module according to claim 5, wherein The first electrically tunable attenuator consists of two diodes.

7. The radio comprehensive test module according to claim 3, characterized in that The specific steps for the directional test unit to divide the radio frequency signals into three co-frequency signals through the multi-stage power divider include: S31: The radio frequency signal is input to the first-stage power divider and divided into a first signal and a second signal. The first signal passes through a first-stage amplification attenuation switching circuit and is output from the main radio frequency input and output port. The second signal is input to the second-stage power divider; S32: The second-stage power divider divides the second signal into a third signal and a fourth signal. The third signal passes through a first-stage amplification attenuation switching circuit and is output from the CR radio frequency output port. The fourth signal is input to a first amplifier to compensate for the insertion loss of the second-stage power divider and then is input to the third-stage power divider; S33: The third-stage power divider divides the fourth signal into a fifth signal and a sixth signal. The fifth signal passes through a first-stage programmable attenuator and then is input to a first balun, and outputs a seventh signal and an eighth signal, which are output from the NS radio frequency output port.

8. The radio comprehensive test module according to claim 7, characterized in that, The first signal and the second signal have the same frequency, amplitude, and phase; The third signal and the fourth signal have the same frequency, amplitude, and phase; The fifth signal and the sixth signal have the same frequency, amplitude, and phase; The amplitudes and frequencies of the first signal and the third signal are the same; the amplitudes of the seventh signal and the eighth signal are the same, and the phase difference is 180 degrees.

9. The radio comprehensive test module according to claim 8, wherein The sixth signal is input to a first-stage programmable attenuator and then to a first-stage balun, and then output from the EW RF output port.

10. A radio comprehensive test module as described in claim 8, characterized in that, The sixth signal and the third signal have the same frequency, and the seventh signal, the eighth signal, and the third signal have the same frequency.

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