A Detection Platform and Detection Method for a Dual-Band Data Link Receiver

Abstract

The present invention relates to the technical field of detection of dual-band data link receivers, and in particular to a detection platform and detection method for dual-band data link receivers. The detection platform and detection method comprise a DC regulated power supply, a switching unit, a function generator, a subcarrier frequency oscillation circuit, a power synthesizer, a microwave signal source, a spectrum analyzer, a digital oscilloscope, and a digital multimeter. The DC regulated power supply can be divided into a DC regulated power supply I and a DC regulated power supply II. The detection platform can simulate the actual power-on process of a tested equipment product, provide detection conditions, control and detect the electrical state change process of the equipment product during the test, and judge the product performance. At the same time, the detection platform can quickly and accurately confirm the technical status of the equipment product, ensuring the smooth completion of the equipment product repair task. The detection platform and detection method effectively guarantee the safety and reliability of the equipment and meet the use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of detection of dual-band data link receivers, and in particular to a detection platform and a detection method for dual-band data link receivers. Background Art

[0002] The rapid development of modern high-tech equipment has placed higher demands on guidance technology. Aircraft fire control systems transmit target data, carrier data, and key guidance information to missiles via data links. Fourth-generation active radar weaponry utilizes radio data link corrections for mid-course guidance and active radar terminal guidance to extend missile range and improve guidance accuracy. The missile's onboard dual-band data link receiver receives the correction signal from the carrier aircraft, amplifies it, downconverts it, extracts the correction information, decodes it, and then sends it to a computer for decoding.

[0003] During the maintenance of a certain type of equipment, it was found that the failure rate of the dual-band data link receiver was high and there was no testing method. In order to improve the repair capability of this type of equipment and deepen the repair depth, the dual-band data link receiver needed to be powered on and tested to simulate the guidance information sent by the carrier aircraft, so as to detect the performance of the dual-band data link receiver, such as its decoding and deformation capabilities, to determine the performance of the equipment. Summary of the Invention

[0004] The present invention aims to provide a testing platform and method for a dual-band data link receiver. This testing platform and method can rapidly test the performance of a dual-band data link receiver, addressing the difficulty of locating faults in the dual-band data link receiver, verifying whether the dual-band data link receiver is functioning properly, and providing a technical basis for troubleshooting by maintenance personnel.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A testing platform for a dual-band data link receiver includes a DC regulated power supply, a switching unit, a function generator, a subcarrier frequency oscillation circuit, a power synthesizer, a microwave signal source, a spectrum analyzer, a digital oscilloscope, and a digital multimeter. The DC regulated power supply can be divided into a DC regulated power supply I and a DC regulated power supply II. The subcarrier frequency oscillation circuit includes three groups of subcarrier frequency oscillators. The DC regulated power supply is connected to the switching unit via a test line. The subcarrier frequency oscillation circuit generates F1, F2, and F3 subcarrier frequency signals, which are sent to a power synthesizer via a coaxial cable for synthesis and then to a function generator. After amplitude modulation by the function generator, the signals are sent to a microwave signal source for frequency modulation. The modulated signals are sent to a "BX" port of the dual-band data link receiver. The dual-band data link receiver is connected to the switching unit via two cables, XS1 and XS2. The spectrum analyzer, digital oscilloscope, and digital multimeter are used to perform testing at corresponding test sites using test probes.

[0007] The DC regulated power supply I is used to provide four working power supplies for the dual-band data link receiver, two working power supplies for the transfer unit, and one working power supply for the subcarrier oscillation circuit; the DC regulated power supply II provides a +5V working power supply for the dual-band data link receiver.

[0008] The function generator, subcarrier oscillation circuit, power combiner, and microwave signal source synthesize a radio correction signal, which is used to simulate the radio correction signal transmitted by the carrier aircraft.

[0009] The transfer unit is connected to the DC regulated power supply and the dual-band data link receiver; the spectrum analyzer, digital oscilloscope, and digital multimeter are connected to the transfer unit and are used to measure the voltage, pulse width, and amplitude of various response signals output by the dual-band data link receiver.

[0010] Further, the radio correction signal adopts "pulse code modulation - frequency modulation", the modulation pulse is a bell-shaped pulse signal, which is equivalent to the square of the sine function, and its formation algorithm is , indicating the variation law of the frequency offset with time within a symbol, is the width of a symbol, and t represents the period.

[0011] Further, the implementation method of the radio correction signal is as follows:

[0012] A1. In the "Arbitrary Waveform" editing menu of the function generator, according to the formula draw the "bell-shaped pulse" waveform by plotting points. To avoid spikes in the waveform, the number of plotted points for the "bell-shaped pulse" is selected as 720, and the pulse waveform is phase-shifted by 180° to form the "bell-shaped pulse" waveform output.

[0013] A2. Store the edited waveform in the "User3" file of the function generator; the 3 groups of subcarrier oscillators respectively correspond to the three subcarrier signals generated by the 3 subcarrier oscillators and are synthesized and output in the power combiner. The amplitude modulation of the bell-shaped pulse signal and the subcarrier signal is completed in the function generator.

[0014] A3. The modulated signal is transmitted to the microwave signal source through a coaxial cable, and frequency modulation processing is performed in the microwave signal source, and finally a radio correction signal is formed and input to the BX interface of the dual-band data link receiver.

[0015] Furthermore, three groups of subcarrier oscillators correspond to subcarrier signals of three different frequencies respectively; transistor V1, crystal oscillator BQ1 and surrounding components form a parallel crystal oscillator, and the generated subcarrier signal is coupled to the resonant amplification network composed of transistor V2, inductor L2, capacitors C5 and C6 through capacitor C4, and is output after frequency-selective amplification; the circuit forms of F2 subcarrier oscillator and F3 subcarrier oscillator are consistent with the F1 subcarrier oscillator circuit, only the frequencies of crystal oscillators BQ1, BQ2 and BQ3 are different.

[0016] Furthermore, the adapter unit includes an integrated coarse voltage control circuit, a fine voltage control circuit, and a dual-band data link receiver band selection instruction. The coarse voltage control circuit and the fine voltage control circuit are used to form a control voltage, and the dual-band data link receiver band selection instruction controls the operating frequency band selection. The implementation method is as follows: in the adapter unit, the +15V and -15V voltages output by the DC regulated power supply I are connected to voltage regulator diodes and then stabilized to +10V and -10V, respectively. Then, the +10V and -10V are connected to a 47KΩ potentiometer and a 22KΩ potentiometer to achieve continuous adjustment of the DC voltage between -10V and +10V. The analog seeker computer control voltage is used for closed-loop control of the dual-band data link receiver VCO (i.e., the coarse control voltage UPG and the fine control voltage UPT).

[0017] Furthermore, the present invention also provides a detection method for a dual-band data link receiver, which is implemented based on a detection platform of the data link receiver and includes the following operations:

[0018] S1. Method for checking the simulated radio correction signal: Connect a spectrum analyzer to a microwave signal source to detect the radio correction signal simulated by the microwave signal source;

[0019] S2. Dual-band data link receiver sensitivity and dynamic range test method: Connect the dual-band data link receiver to the adapter unit and measure the receiver sensitivity and dynamic range by adjusting the coarse control voltage UPG, fine control voltage UPT, and radio correction signal power level.

[0020] S3. Dual-band data link receiver demodulation capability test method: Connect the dual-band data link receiver to the adapter unit, and measure the maximum amplitude of the bell pulse by adjusting the coarse control voltage UPG and the fine control voltage UPT.

[0021] S4. Test method for the symbol shaping and restoration capability of a dual-band data link receiver: Connect the dual-band data link receiver to the adapter unit, and measure the amplitude and pulse width of the comparator output pulse by adjusting the coarse control voltage UPG and the fine control voltage UPT.

[0022] The beneficial effects of the present invention are as follows: the dual-band data link receiver testing platform and method provided by the present invention can simulate the actual power-up process of the equipment product under test, provide testing conditions, control and detect the changes in the electrical state of the equipment product during the test, and judge the product's performance. At the same time, it can quickly and accurately confirm the technical status of the equipment product, ensuring the smooth completion of the equipment product repair task. In terms of the actual use of the tested products, the present invention is safe, convenient, and fast to operate, ensuring the smooth progress of product repair support, and effectively guaranteeing the safety and reliability of the equipment, meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A connection block diagram of a detection platform of a data link receiver according to an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the subcarrier signal oscillation circuit in an embodiment of the present invention;

[0025] Figure 3 A coarse and fine voltage control circuit in a switching unit in an embodiment of the present invention;

[0026] Figure 4 yes Figure 1 A schematic diagram of the layout of an embodiment of a switching unit panel in FIG. DETAILED DESCRIPTION

[0027] Specific embodiment 1: The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that: in the present invention, unless otherwise specified, all the implementation methods and preferred implementation methods mentioned herein can be combined with each other to form a new technical solution. In the present invention, unless otherwise specified, all the technical features and preferred features mentioned herein can be combined with each other to form a new technical solution. The "scope" disclosed in the present invention can be in the form of a lower limit and an upper limit, which can be one or more lower limits, and one or more upper limits, respectively.

[0028] As the instruction manual Figure 1As shown, a detection platform for a dual-band data link receiver of the present invention includes a DC regulated power supply (DC regulated power supply I and DC regulated power supply II), a switching unit, a spectrum analyzer, a digital oscilloscope, a digital multimeter, a function generator, a power synthesizer, a subcarrier frequency oscillator, and a microwave signal source. The DC regulated power supply is used to provide +15V, -15V, +6V, -6V and +5V working power supplies for the adapter unit; the subcarrier frequency oscillation circuit includes three groups of subcarrier frequency oscillators; the DC regulated power supply is connected to the adapter unit through a test line, and the subcarrier frequency oscillation circuit generates F1, F2, and F3 subcarrier frequency signals, which are sent to the power combiner through a coaxial cable for synthesis and then sent to the function generator. After amplitude modulation by the function generator, the signal is sent to the microwave signal source for frequency modulation. The modulated signal is sent to the "BX" port of the dual-band data link receiver, and the dual-band data link receiver is connected to the adapter unit via two cables, XS1 and XS2. The spectrum analyzer, digital oscilloscope, and digital multimeter are used to perform tests at the corresponding pilot site through test probes;

[0029] As the instruction manual Figure 1 As shown, the adapter unit is connected to the dual-band data link receiver via a 15-pin socket and a 37-pin socket. The 15-pin socket is labeled XS1, and the 37-pin socket is labeled XS2. They are installed on the dual-band data link receiver. The +15V, -15V, +6V, -6V, and +5V power supplies, coarse and fine voltage control, and output signals of the dual-band data link receiver are all connected to the adapter unit via XS2. The adapter unit includes an internally integrated coarse and fine voltage control circuit and a frequency band selection command circuit. The coarse and fine voltage control circuit is used to form the dual-band data link receiver VCO local oscillator control voltage. The dual-band data link receiver frequency band selection command is used to select the operating frequency band.

[0030] As the instruction manual Figure 2 As shown, BQ1 is a crystal oscillator, R1, R3, and R4 are bias resistors of transistor V1; C3 and C7 are bypass capacitors that keep the base of transistor V1 at AC zero potential, L1 is the loop inductor, and the oscillation signal is sent to the base of the frequency-selective amplifier V2 via the coupling capacitor C7. The collector of V3 sends the amplified signal into the resonant frequency-selective loop composed of inductor L2, capacitors C5, and C6. Adjusting the inductor L2 can make the loop resonate at the fundamental frequency. The oscillation signal is output to the power combiner via the coupling capacitor C8, resistor R7, and RP1; R5 and R6 are bias resistors of transistor V2, and R2 is the emitter feedback resistor of transistor V2, which is used to stabilize the DC operating point.

[0031] As the instruction manual Figure 3As shown, the +15V and -15V outputs of the DC regulated power supply I are connected to the switch and respectively connected to the resistors R1 and R2 for current limiting. The outputs are respectively connected to the Zener diodes D1 and D2. After the outputs of the Zener diodes D1 and D2, they are connected to the potentiometers R3 and R4. The adjustment terminal of R3 is connected to XS2-6, which outputs the coarse control voltage UPG. The output adjustment terminal of R4 is connected to XS2-8, which outputs the fine control voltage UPT. When the switch S1 is closed, XS1-12 is turned on, and the receiver operates in the even frequency band. When the switch S3 is closed, XS1-11 is turned on, and the receiver operates in the odd frequency band.

[0032] The function generator, subcarrier frequency oscillator, power synthesizer, and analog signal source are used to synthesize the radio correction signal. The radio correction signal is formed by selecting the CH1 channel through the "CH1 / CH2" button of the function generator, pressing the "arbitrary wave" button, and selecting the "User3" waveform. Set the operating mode to "pulse" state, and the signal period is is one symbol width, the amplitude is 1Vpp, the signal source is "internal", and the trigger interval is The width of the signal is two code elements. The F1, F2, and F3 signals output by the three subcarrier oscillators are output to the power combiner for addition synthesis and then output to the function generator for amplitude modulation with the bell pulse. The modulated signal is sent to the "EXT1" port of the microwave signal source. The frequency of the microwave signal source output signal is set to the 1# point frequency. The "FM" (frequency modulation) mode is selected. The modulation signal comes from the "EXT1" port. The "FM Dev" mode is selected to set the modulation depth.

[0033] The spectrum analyzer, digital oscilloscope and digital multimeter are connected to the adapter unit and are used to measure the voltage, pulse width and amplitude of various signals output by the dual-band data link receiver.

[0034] This embodiment further provides a dual-band data link receiver detection method, which is implemented based on the above-mentioned dual-band data link receiver detection platform and includes the following steps:

[0035] S1. Checking method of simulated radio correction signal: Use spectrum analyzer to detect the radio correction signal simulated by the analog signal source. When the equipment parameters are set correctly, the modulation power and carrier power suppression ratio is (-20±2)dB. If it does not meet the requirements, you can adjust the Figure 2 The resistance of the RP1 potentiometer in the subcarrier signal oscillation circuit.

[0036] S2. Sensitivity and dynamic range test method: Power on the dual-band data link receiver. Apply the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT to pins XS2-6 and XS2-8. Input the corrected signals with frequencies at points 1# to 5# at the "BX" port. Connect the "low level" to interface XS1-11 to turn on the odd-band control instruction. Adjust the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT, and observe the output signals of F1 detection, F2 detection, and F3 detection. When the outputs of F1 detection, F2 detection, and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT. Decrease the power level of the radio corrected signal until at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator has a pulse width < 0.20 ms or there is an error code in the output sequence. Record the power level P0 of the radio corrected signal input to port BX at this time, which is the sensitivity of the dual-band data link receiver when operating in the odd band. Increase the power level of the radio corrected signal until at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator has a pulse width < 0.20 ms or there is an error code in the output sequence. Record the power level P1 of the radio corrected signal input to port BX at this time. |P1 - P0| is the dynamic range of the dual-band data link receiver when operating in the odd band.

[0037] Power on the dual-band data link receiver. Input the corrected signal with a frequency of 6# at the "BX" port. Apply the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT to pins XS2-6 and XS2-8. Connect the "low level" to interface XS1-12 to turn on the even-band control instruction. Adjust the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT, and observe the output signals of F1 detection, F2 detection, and F3 detection. When the outputs of F1 detection, F2 detection, and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT. Decrease the power level of the radio corrected signal until at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator has a pulse width < 0.20 ms or there is an error code in the output sequence. Record the power level P0 of the radio corrected signal input to port BX at this time, which is the sensitivity of the dual-band data link receiver when operating in the even band. Increase the power level of the radio corrected signal until at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator has a pulse width < 0.20 ms or there is an error code in the output sequence. Record the power level P1 of the radio corrected signal input to port BX at this time. |P1 - P0| is the dynamic range of the dual-band data link receiver when operating in the even band.

[0038] S3. Demodulation ability test method for dual-band data link receiver: Power on the dual-band data link receiver, apply the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT to the pins XS2-6 and XS2-8, input the corrected signals with the signal frequencies of 1# to 5# at the "BX" port, connect the odd-band control command by applying a "low level" to the XS1-11 interface, adjust the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT, and observe the output signals of F1 detection, F2 detection and F3 detection. When the outputs of F1 detection, F2 detection and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT. Record the amplitude of the bell-shaped pulse at this time.

[0039] S4. Symbol shaping ability test method for dual-band data link receiver: Power on the dual-band data link receiver, apply the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT to the pins XS2-6 and XS2-8, input the corrected signals with the signal frequencies of 1# to 5# at the "BX" port, connect the odd-band control command by applying a low level to the XS1-11 interface, adjust the coarse adjustment control voltage UPG and the fine adjustment control voltage UPT, and observe the output signals of F1 detection, F2 detection and F3 detection. When the outputs of F1 detection, F2 detection and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT. Record the amplitude and pulse width of the output pulses of the F1 comparator, F2 comparator and F3 comparator at this time.

[0040] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A detection platform for a dual - band data - link receiver, characterized in that, It includes a DC regulated power supply, a switching unit, a function generator, a subcarrier frequency oscillation circuit, a power synthesizer, a microwave signal source, a spectrum analyzer, a digital oscilloscope and a digital multimeter. The DC regulated power supply is divided into a DC regulated power supply I and a DC regulated power supply II; the subcarrier frequency oscillation circuit includes three groups of subcarrier frequency oscillators; A DC regulated power supply is connected to the adapter unit via a test line. The subcarrier oscillation circuit generates F1, F2, and F3 subcarrier signals, which are then sent to a power combiner via a coaxial cable. After synthesis, they are sent to a function generator. After amplitude modulation by the function generator, they are sent to a microwave signal source for frequency modulation. The modulated signals are then sent to the "BX" port of the dual-band data link receiver. The dual-band data link receiver is connected to the adapter unit via cables XS1 and XS2. A spectrum analyzer, digital oscilloscope, and digital multimeter are used to conduct tests at the corresponding pilot site using test probes. The DC regulated power supply I is used to provide four working power supplies for the dual-band data link receiver, two working power supplies for the adapter unit, and one working power supply for the subcarrier frequency oscillation circuit; the DC regulated power supply II provides a +5V working power supply for the dual-band data link receiver; The function generator, subcarrier frequency oscillation circuit, power synthesizer, and microwave signal source synthesize a radio correction signal for simulating a radio correction signal transmitted by a carrier aircraft to a missile; The adapter unit is connected to a DC regulated power supply and a dual-band data link receiver; the spectrum analyzer, digital oscilloscope, and digital multimeter are connected to the adapter unit and are used to measure the voltage, pulse width, and amplitude of various response signals output by the dual-band data link receiver; The implementation method of the radio correction signal is as follows: A1. In the "Arbitrary Waveform" editing menu of the function generator, according to the formula Draw the "bell-shaped pulse" waveform by plotting points. To avoid spikes in the waveform, select 720 points for plotting the "bell-shaped pulse", and phase-shift the pulse waveform by 180° to form the output of the "bell-shaped pulse" waveform. A2. Store the edited waveform in the "User3" file of the function generator. The three subcarrier signals generated by the three groups of subcarrier oscillators correspond to the three subcarrier oscillators, which are synthesized and output by the power combiner. The amplitude modulation of the bell pulse signal and the subcarrier signal is completed in the function generator. A3. The modulated signal is transmitted to the microwave signal source through a coaxial cable, where it is frequency modulated and finally forms a radio correction signal which is sent to the BX interface of the dual-band data link receiver.

2. The detection platform of a dual-band data link receiver according to claim 1, characterized in that The radio correction signal adopts "pulse code modulation - frequency modulation", and the modulation pulse is a bell-shaped pulse signal, which is equivalent to the square of a sine function. Its formation algorithm is , which is the width of one code element.

3. The detection platform of a dual-band data link receiver according to claim 2, characterized in that The three groups of subcarrier oscillators correspond to three subcarrier signals of different frequencies respectively; transistor V1, crystal oscillator BQ1 and surrounding components form a parallel crystal oscillator. The generated subcarrier signal is coupled to the resonant amplifier network composed of transistor V2, inductor L2, capacitors C5 and C6 through capacitor C4, and is output after frequency-selective amplification. The circuit forms of F2 subcarrier oscillator and F3 subcarrier oscillator are the same as F1 subcarrier oscillator circuit, only the frequencies of crystal oscillators BQ1, BQ2 and BQ3 are different.

4. The detection platform of a dual-band data link receiver according to claim 1, characterized in that, The adapter unit includes an integrated coarse voltage control circuit, a fine voltage control circuit, and a dual-band data link receiver band selection instruction. The coarse voltage control circuit and the fine voltage control circuit are used to form a control voltage, and the dual-band data link receiver band selection instruction controls the operating frequency band selection. The implementation method is as follows: In the adapter unit, the +15V and -15V voltages output by the DC regulated power supply I are connected to voltage regulator diodes and then stabilized to +10V and -10V, respectively. The +10V and -10V are then connected to a 47KΩ potentiometer and a 22KΩ potentiometer to achieve continuous adjustment of the DC voltage between -10V and +10V. The analog seeker computer control voltage is used for closed-loop control of the dual-band data link receiver VCO, namely the coarse control voltage UPG and the fine control voltage UPT.

5. A detection method for a dual-band data link receiver, which is implemented based on the detection platform of the data link receiver described in any one of the above claims 1-4, characterized in that, The following operations are included: S1. Method for checking the simulated radio correction signal: Connect a spectrum analyzer to a microwave signal source to detect the radio correction signal simulated by the microwave signal source; S2. Dual-band data link receiver sensitivity and dynamic range test method: Connect the dual-band data link receiver to the adapter unit and measure the receiver sensitivity and dynamic range by adjusting the coarse control voltage UPG, fine control voltage UPT, and radio correction signal power level. S3. Dual-band data link receiver demodulation capability test method: Connect the dual-band data link receiver to the adapter unit, and measure the maximum amplitude of the bell pulse by adjusting the coarse control voltage UPG and the fine control voltage UPT. S4. Test method for the symbol shaping and restoration capability of a dual-band data link receiver: Connect the dual-band data link receiver to the adapter unit, and measure the amplitude and pulse width of the comparator output pulse by adjusting the coarse control voltage UPG and the fine control voltage UPT.

6. The detection method of a dual-band data link receiver according to claim 5, characterized in that, In S2, power the dual-band data link receiver, apply the coarse-adjustment control voltage UPG and the fine-adjustment control voltage UPT to the XS2-6 and XS2-8 pins, respectively. Input a correction signal with a frequency of 1# to 5# points into the "BX" port. Set the XS1-11 interface to "low" to connect the odd-band control command. Adjust the coarse-adjustment control voltage UPG and the fine-adjustment control voltage UPT, and observe the output signals of the F1, F2, and F3 detectors. When the F1, F2, and F3 detectors output bell-shaped pulses with the maximum output amplitude, stop adjusting UPG and UPT. Reduce the radio correction signal power level until at least one of the F1, F2, and F3 comparators has an output pulse width of less than 0.20 ms or an output sequence contains bit errors. Record the radio correction signal power level P0 input to port BX at this time, which is the sensitivity of the dual-band data link receiver when operating in the odd frequency band. Increase the radio correction signal power level until at least one of the F1, F2, and F3 comparators has an output pulse width of less than 0.20 ms or an output sequence contains bit errors. Record the radio correction signal power level P1 input to port BX at this time. |P1-P0| is the dynamic range of the dual-band data link receiver when operating in the odd frequency band.

7. The detection method of a dual-band data link receiver according to claim 5, characterized in that, In S2, power on the dual-band data link receiver, input a correction signal with a signal frequency of 6# point frequency at the "BX" port, apply a coarse tuning control voltage UPG and a fine tuning control voltage UPT to pins XS2-6 and XS2-8 respectively, apply a "low level" to the XS1-12 interface to turn on the even-band control instruction, adjust the coarse tuning control voltage UPG and the fine tuning control voltage UPT, and observe the output signals of F1 detection, F2 detection, and F3 detection; when the outputs of F1 detection, F2 detection, and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT; reduce the power level of the radio correction signal until the pulse width of at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator is <0.20 ms or there is an error code in the output sequence, and record the power level P0 of the radio correction signal input to port BX at this time, which is the sensitivity of the dual-band data link receiver when operating in the even band; increase the power level of the radio correction signal until the pulse width of at least one of the outputs of the F1 comparator, F2 comparator, and F3 comparator is <0.20 ms or there is an error code in the output sequence, and record the power level P1 of the radio correction signal input to port BX at this time, and |P1 - P0| is the dynamic range of the dual-band data link receiver when operating in the even band.

8. The detection method of a dual-band data link receiver according to claim 5, characterized in that In S3, power on the dual-band data link receiver, apply a coarse tuning control voltage UPG and a fine tuning control voltage UPT to pins XS2-6 and XS2-8, input a correction signal with a signal frequency of 1# - 5# point frequency at the "BX" port, apply a "low level" to the XS1-11 interface to turn on the odd-band control instruction, adjust the control voltages UPG and UPT, and observe the output signals of F1 detection, F2 detection, and F3 detection; when the outputs of F1 detection, F2 detection, and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT; record the amplitude of the bell-shaped pulse at this time.

9. The detection method of a dual-band data link receiver according to claim 5, characterized in that, Power on the dual-band data link receiver, apply a coarse tuning control voltage UPG and a fine tuning control voltage UPT to pins XS2-6 and XS2-8, input a correction signal with a signal frequency of 1# - 5# point frequency at the "BX" port, apply a low level to the XS1-11 interface to turn on the odd-band control instruction, adjust the coarse tuning control voltage UPG and the fine tuning control voltage UPT, and observe the output signals of F1 detection, F2 detection, and F3 detection; when the outputs of F1 detection, F2 detection, and F3 detection are bell-shaped pulses and the output amplitude is the largest, stop adjusting UPG and UPT; record the amplitude and pulse width of the output pulses of the F1 comparator, F2 comparator, and F3 comparator at this time.

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