A detection method for the main channel intermediate frequency signal receiver of a radar product.

Abstract

This invention belongs to the field of electronic technology, specifically disclosing a testing method for a main channel intermediate frequency (IF) signal receiver of a radar product. It utilizes a switching and control unit to load and control various input signals of the main channel IF signal receiver, enabling detection of power supply voltage and current consumption. It also allows for the detection of the output IF signal frequency and power under conditions where control signals I, II, and III are all loaded, as well as under conditions where control signals I, II, or III are loaded individually. This testing method enables the detection of the frequency and power of various complex spectral components of the normalized IF signal output by the main channel IF signal receiver, and can perform performance testing and fault location functions for the main channel IF signal receiver of this imported radar product.

Description

Technical Field

[0001] This invention belongs to the field of electronic technology, and specifically discloses a detection method for the intermediate frequency signal receiver of the main channel of a radar product. Background Technology

[0002] Currently, the testing of the main channel intermediate frequency (IF) signal receiver for imported products in China is performed as a closed-loop system integrated with the entire product on dedicated testing equipment. This main channel IF signal receiver is a core component of this imported radar product. Its main function is to filter, amplify, and down-convert the three IF signals output from the main channel microwave receiver under the combined action of the synchronization signal from the synchronization component and the control signal from the signal conditioning component, ultimately providing a normalized IF signal for the subsequent signal conditioning component. Because the IF signal generated by this main channel IF signal receiver has an extremely complex spectral composition and high signal performance requirements, this invention designs a simple, reliable, and effective rapid testing method to accurately determine whether the electrical performance of the main channel IF signal receiver is normal and to provide reliable technical guidance for troubleshooting. Summary of the Invention

[0003] To address the problems in the background art, this invention discloses a detection method for a main channel intermediate frequency (IF) signal receiver of a radar product. This method enables the detection of the correctness of technical parameters such as frequency and power of various complex spectral components of the normalized IF signal output by the main channel IF signal receiver. It ensures that fault areas can be distinguished and faulty components can be located during the detection of the main channel IF signal receiver, thus guaranteeing the safety and reliability of in-depth repair work on the main channel IF signal receiver.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A testing method for a radar-type product's main channel intermediate frequency signal receiver, wherein the testing method requires the use of a testing platform, the testing platform including a DC regulated power supply, a switching and control unit, an analog signal source, a function generator, a signal analyzer, a digital multimeter, a power divider, an attenuator, and a synthesizer, the specific testing process is as follows: Power supply voltage and current consumption detection: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect a digital multimeter to the +6V voltage detection port and -6V voltage detection port on the adapter and control unit to detect the DC output voltage, and record the output voltage values ​​of the +6V voltage detection port and -6V voltage detection port on the digital multimeter. Record the current consumption values ​​of the +6V and -6V voltages on the DC regulated power supply. Determine and record whether the detection results meet the technical specifications. Turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches on the adapter and control unit. Detection of output intermediate frequency signal frequency and power under the condition that control signal I, control signal II and control signal III are all loaded: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a and intermediate frequency signal b, record and judge whether the detection results meet the technical specifications. At the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches. Detection of output intermediate frequency signal frequency and power under the condition of control signal I alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal I switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a1 and intermediate frequency signal b1, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal I switch; Detection of output intermediate frequency signal frequency and power under the condition of control signal II alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal II switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a2 and intermediate frequency signal b2, record and judge whether the detection results meet the technical specifications, and at the same time turn off the +6V and -6V power control switches on the adapter and control unit and turn off the control signal II switch; Frequency and power detection of output intermediate frequency signal under the condition of control signal III alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal III switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a3 and intermediate frequency signal b3, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal III switch.

[0005] Furthermore, in the detection method of the main channel intermediate frequency signal receiver of the radar-type product, the switching and control unit is used to realize the control connection, signal processing and signal acquisition of the main channel intermediate frequency signal receiver with the DC regulated power supply, function generator and analog signal source. The switching and control unit includes a switching and control circuit, a control signal III synthesis circuit and a control panel. The switching and control circuit realizes the switching, on / off control and detection of +6V / -6V power signals, control signal I, control signal II and control signal III. The control signal III synthesis circuit is used to realize the synthesis of an irregular periodic narrow and wide pulse control signal III by delaying and XORing control signal I and control signal II. The control panel is provided with +6V voltage detection port, -6V voltage detection port, control signal I detection port, control signal II detection port and control signal III detection port, +6V power control switch, -6V power control switch, control signal I switch, control signal II switch and control signal III switch.

[0006] Furthermore, in the detection method of the main channel intermediate frequency signal receiver of the radar-type product, the DC regulated power supply provides +6V / -6V operating power to the main channel intermediate frequency signal receiver through the adapter and control unit, and at the same time provides +7V operating power to the control signal III synthesis circuit on the adapter and control unit.

[0007] Furthermore, the detection method for the main channel intermediate frequency signal receiver of the radar-type product includes analog signal sources 1, 2, 3, and 4. Analog signal sources 1, 2, and 3 are connected to the signal input port of the main channel intermediate frequency signal receiver via a power divider, attenuator 1, attenuator 2, and synthesizer, and are used to simulate the differential I-channel input signal, differential II-channel input signal, and vector Σ-channel input signal output by the main channel microwave receiver of the product. Analog signal source 4 is connected to the signal input port of the main channel intermediate frequency signal receiver and is used to simulate the secondary reference oscillation signal output by the frequency source component of the product.

[0008] Furthermore, the detection method for the main channel intermediate frequency signal receiver of the radar-type product includes a function generator 1, a function generator 2, and a function generator 3. Function generator 1 is used to simulate the control signal I and control signal II output by the synchronization component of the entire product. Function generator 2 provides a control signal source for the control signal III synthesis circuit on the transfer and control unit, and is used to simulate the control signal III output by the synchronization component of the entire product. Function generator 3 is used to simulate the clock synchronization signal output by the entire product.

[0009] Furthermore, in the detection method of the main channel intermediate frequency signal receiver of the radar product, a signal analyzer is connected to the Σ-channel signal output port of the main channel intermediate frequency signal receiver for detecting the intermediate frequency signal frequency and power.

[0010] Furthermore, in the detection method of the main channel intermediate frequency signal receiver of the radar-type product, a digital multimeter is used to detect the power supply voltage and current consumption.

[0011] Compared with the prior art, the beneficial effects of the present invention are: This invention discloses a testing method for the main channel intermediate frequency (IF) signal receiver of a radar-type product. This method utilizes the clock synchronization signal output from the synchronization component of the simulated product, the secondary reference oscillator signal output from the frequency source component, the differential input signals I, II, and vector input signals output from the main channel microwave receiver, and the three control signals I, II, and III output from the signal conditioning component of the simulated product. This method enables the detection of the correctness of technical parameters such as frequency and power of various complex spectral components of the normalized IF signal output from the main channel IF signal receiver, ensuring the accuracy of the main channel IF signal receiver's performance. During intermediate frequency (IF) signal receiver testing, the fault area can be distinguished and the faulty component located, ensuring the safety and reliability of in-depth repair work on the main channel IF signal receiver. It does not require the product to provide various input and control signals. Relying only on general-purpose equipment and self-developed circuits, it can independently, quickly and reliably complete the performance testing of the main channel IF signal receiver. It breaks away from the fixed control methods and signal characteristics of the product and, through free human control, loads input signals and control signals with different characteristics, which can accurately realize the performance testing of the main channel IF signal receiver, the distinction of fault areas, and the location of faulty components. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the connection and detection between the main channel intermediate frequency signal receiver and the equipment in this invention; Figure 2 This is a layout diagram of the transfer and control unit panel in this invention; Figure 3 This is the circuit diagram for synthesizing control signal III in this invention. Detailed Implementation

[0013] To better understand the present invention, the following embodiments further illustrate the content of the invention, but the scope of protection of the present invention is not limited to the following embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0014] Combined with appendix Figure 1-3 This invention details a detection method for a radar-type product's main channel intermediate frequency signal receiver. The detection method requires the use of a detection platform. First, a detection platform is built, which includes a DC regulated power supply, a converter and control unit, an analog signal source, a function generator, a signal analyzer, a digital multimeter, a power divider, an attenuator, and a synthesizer. The switching and control unit is used to realize the control connection, signal processing, and signal acquisition between the main channel intermediate frequency signal receiver and the DC regulated power supply, function generator, and analog signal source. The switching and control unit includes switching and control circuitry, control signal synthesis circuitry, and control panel, such as... Figure 1 As shown, the switching and control circuit realizes the switching, on / off control, and detection of +6V / -6V power signals, control signal I, control signal II, and control signal III, as follows: Figure 3 As shown, the control signal III synthesis circuit is used to synthesize an unconventional periodic narrow-wide pulse control signal III from control signals I and II through delay and XOR operation. Function generator 1 outputs control signals I and II and participates in the delay operation. The DC regulated power supply provides a +7V supply voltage to the SN74LS232 chip. The SN74LS232 chip mainly performs the XOR operation function and outputs the unconventional periodic "narrow-wide" pulse control signal III, such as... Figure 2As shown, the control panel is equipped with a +6V voltage detection port, a -6V voltage detection port, a control signal I detection port, a control signal II detection port, and a control signal III detection port; a +6V power control switch, a -6V power control switch, a control signal I switch, a control signal II switch, and a control signal III switch; and an XP1 (15-pin) integrated socket on the adapter and control unit panel for integrated connection of various external signals with the main channel intermediate frequency signal receiver. The +6V power control switch, -6V power control switch, control signal I switch, control signal II switch, and control signal III switch buttons on the panel are used to control the switching of the corresponding signals. The +6V voltage detection port, -6V voltage detection port, ground, and control signal... Detection ports I, II, and III are used to monitor the corresponding signal characteristics. Various signals can be loaded and controlled simply by operating the relevant buttons on the adapter and control unit. This allows for the detection of various response signals from the main channel intermediate frequency (IF) receiver, eliminating the need for input and control signals from the main product. Relying solely on general-purpose equipment and self-developed circuitry, it can independently, quickly, and reliably complete the performance testing of the main channel IF receiver. This eliminates the fixed control methods and signal characteristics of the main product, allowing for free manual control by loading input and control signals with different characteristics. This enables accurate performance testing of the main channel IF receiver, differentiation of fault areas, and location of faulty components. The DC regulated power supply provides +6V / -6V operating power to the main channel intermediate frequency signal receiver through the adapter and control unit, and at the same time provides +7V operating power to the control signal III synthesis circuit on the adapter and control unit; The analog signal sources, power dividers, attenuators, and combiners are mainly used to simulate the four input signals output by the main product: the secondary reference oscillation signal, differential input signal I, differential input signal II, and vector input signal Σ. The analog signal sources include analog signal source 1, analog signal source 2, analog signal source 3, and analog signal source 4. Analog signal sources 1, 2, and 3 are connected to the signal input port of the main channel intermediate frequency signal receiver via power dividers, attenuators 1 and 2, and the combiner. They are used to simulate the differential input signal I, differential input signal II, and vector input signal Σ output by the main channel microwave receiver of the main product. Specifically, the power divider... The output analog signal consists of three branches: branch 1, branch 2, and branch 3. The analog signals of branch 1 and branch 2 pass through attenuators 1 and 2 respectively to simulate the differential I-channel input signal and differential II-channel input signal output by the main channel microwave receiver of the product. The analog signal of branch 3 is sent to the synthesizer. The analog signal sources 2 and 3 each output an analog signal to the synthesizer. The synthesizer combines the three received analog signals to simulate the vector Σ-channel input signal output by the main channel microwave receiver of the product. The analog signal source 4 is connected to the signal input port of the main channel intermediate frequency signal receiver to simulate the secondary reference oscillation signal output by the frequency source component of the product. The function generator is mainly used to simulate the clock synchronization signal, control signal I, and control signal II output by the entire product, and to provide the control signal source for the control signal III synthesis circuit on the transfer and control unit. The function generator includes function generator 1, function generator 2, and function generator 3. Function generator 1 is used to simulate the control signal I and control signal II output by the synchronization component of the entire product; function generator 2 provides the control signal source for the control signal III synthesis circuit on the transfer and control unit, and is used to simulate the control signal III output by the synchronization component of the entire product; function generator 3 is used to simulate the clock synchronization signal output by the entire product, and function generator 3 uses a serial external triggering method to control function generator 2, and function generator 2 uses a serial external triggering method to control function generator 1, so as to realize the fixed sequence of startup of each function generator and precisely control the time delay of the output control signal I, control signal II, and control signal III. The signal analyzer is connected to the Σ-channel signal output port of the main channel intermediate frequency signal receiver for detecting the intermediate frequency signal frequency and power, while the digital multimeter is used for detecting the power supply voltage and current consumption.

[0015] The detection method for the main channel intermediate frequency signal receiver of the radar-type product of this invention is as follows: Power supply voltage and current consumption detection: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect a digital multimeter to the +6V voltage detection port and -6V voltage detection port on the adapter and control unit to detect the DC output voltage, and record the output voltage values ​​of the +6V voltage detection port and -6V voltage detection port on the digital multimeter. Record the current consumption values ​​of the +6V and -6V voltages on the DC regulated power supply. Determine and record whether the detection results meet the technical specifications. Turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches on the adapter and control unit. Detection of output intermediate frequency signal frequency and power under the condition that control signal I, control signal II and control signal III are all loaded: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a and intermediate frequency signal b, record and judge whether the detection results meet the technical specifications. At the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches. Detection of output intermediate frequency signal frequency and power under the condition of control signal I alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal I switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a1 and intermediate frequency signal b1, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal I switch; Detection of output intermediate frequency signal frequency and power under the condition of control signal II alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal II switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a2 and intermediate frequency signal b2, record and judge whether the detection results meet the technical specifications, and at the same time turn off the +6V and -6V power control switches on the adapter and control unit and turn off the control signal II switch; Frequency and power detection of output intermediate frequency signal under the condition of control signal III alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal III switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a3 and intermediate frequency signal b3, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal III switch.

[0016] This invention discloses a testing method for the main channel intermediate frequency (IF) signal receiver of radar-type products. The method is simple to operate; various signals can be loaded and controlled simply by operating the relevant buttons on the adapter and control unit. This allows for the detection of various response signals from the main channel IF signal receiver, eliminating the need for input and control signals from the entire product unit. Relying solely on general-purpose equipment and self-developed circuitry, the performance testing of the main channel IF signal receiver can be completed independently, quickly, and reliably. This solves the problem of performance testing of main channel IF signal receivers containing multiple complex superimposed IF signals, ensuring the differentiation of fault areas and the location of faulty components during deep receiver repair. Using this testing method, the testing of the main channel IF signal receiver is realized. Based on this method, a repair process specification and repair work card for the receiver have been developed, providing testing capabilities in stand-alone receiver mode, ensuring the safety and reliability of receiver repair work, and meeting usage requirements.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A testing method for a radar-type product's main channel intermediate frequency signal receiver, wherein the testing method requires the use of a testing platform, the testing platform comprising a DC regulated power supply, a switching and control unit, an analog signal source, a function generator, a signal analyzer, a digital multimeter, a power divider, an attenuator, and a synthesizer, characterized in that, The specific testing process is as follows: Power supply voltage and current consumption detection: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect the digital multimeter to the +6V voltage detection port and the -6V voltage detection port on the adapter and control unit. Detect and record the output voltage values ​​of the +6V voltage detection port and the -6V voltage detection port on the digital multimeter. Record the current consumption values ​​of the +6V and -6V voltages on the DC regulated power supply. Determine and record whether the detection results meet the technical specifications. Turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches on the adapter and control unit. Detection of output intermediate frequency signal frequency and power under the condition that control signal I, control signal II and control signal III are all loaded: Turn on the +6V and -6V power control switches on the adapter and control unit, and simultaneously turn on control signal I, control signal II and control signal III switches on the adapter and control unit. Connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a and intermediate frequency signal b, record and judge whether the detection results meet the technical specifications. At the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off control signal I, control signal II and control signal III switches. Detection of output intermediate frequency signal frequency and power under the condition of control signal I alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal I switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a1 and intermediate frequency signal b1, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal I switch; Detection of output intermediate frequency signal frequency and power under the condition of control signal II alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal II switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a2 and intermediate frequency signal b2, record and judge whether the detection results meet the technical specifications, and at the same time turn off the +6V and -6V power control switches on the adapter and control unit and turn off the control signal II switch; Frequency and power detection of output intermediate frequency signal under the condition of control signal III alone loading: Turn on the +6V and -6V power control switches on the adapter and control unit, turn on the control signal III switch on the adapter and control unit, connect the signal analyzer to the ∑ signal output port of the main channel intermediate frequency signal receiver, detect the frequency and power values ​​of the output intermediate frequency signal a3 and intermediate frequency signal b3, record and judge whether the detection results meet the technical specifications, at the same time, turn off the +6V and -6V power control switches on the adapter and control unit, and turn off the control signal III switch.

2. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 1, characterized in that, the switching... The control unit is used to realize the control connection, signal processing, and signal acquisition of the main channel intermediate frequency signal receiver, DC regulated power supply, function generator, and analog signal source. The switching and control unit includes a switching and control circuit, a control signal III synthesis circuit, and a control panel. The switching and control circuit realizes the switching, on / off control, and detection of +6V / -6V power signals, control signal I, control signal II, and control signal III. The control signal III synthesis circuit is used to synthesize an irregular periodic narrow-wide pulse control signal III from control signal I and control signal II through delay and XOR operation. The control panel is equipped with +6V voltage detection port, -6V voltage detection port, control signal I detection port, control signal II detection port, and control signal III detection port, as well as +6V power control switch, -6V power control switch, control signal I switch, control signal II switch, and control signal III switch.

3. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 2, characterized in that, The DC regulated power supply provides +6V / -6V operating power to the main channel intermediate frequency signal receiver through the adapter and control unit, and at the same time provides +7V operating power to the control signal III synthesis circuit on the adapter and control unit.

4. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 2, characterized in that, The analog signal sources include analog signal source 1, analog signal source 2, analog signal source 3, and analog signal source 4. Analog signal source 1, analog signal source 2, and analog signal source 3 are connected to the signal input port of the main channel intermediate frequency signal receiver through a power divider, attenuator 1, attenuator 2, and synthesizer. They are used to simulate the differential I-channel input signal, differential II-channel input signal, and vector Σ-channel input signal output by the main channel microwave receiver of the complete product. Analog signal source 4 is connected to the signal input port of the main channel intermediate frequency signal receiver and is used to simulate the secondary reference oscillation signal output by the frequency source component of the complete product.

5. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 2, characterized in that, The function generator includes function generator 1, function generator 2, and function generator 3. Function generator 1 is used to simulate the control signal I and control signal II output by the synchronization component of the product. Function generator 2 provides the control signal source for the control signal III synthesis circuit on the transfer and control unit, and is used to simulate the control signal III output by the synchronization component of the product. Function generator 3 is used to simulate the clock synchronization signal output by the product.

6. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 1, characterized in that, The signal analyzer is connected to the Σ-channel signal output port of the main channel intermediate frequency signal receiver for detecting the intermediate frequency signal frequency and power.

7. The detection method for the main channel intermediate frequency signal receiver of a radar-type product according to claim 1, characterized in that, Digital multimeters are used to detect power supply voltage and current consumption.

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