Overall calibration system and method of satellite intensive test system

Abstract

The invention provides an overall calibration system and method for a satellite intensive test system. The overall calibration system comprises a reference source module, an external excitation source module, an interference source module, a signal measurement module and a signal detection module, the reference source module is used for generating a reference signal, so that the satellite intensive test system, the external excitation source module, the interference source module and the signal measurement module are located on a unified reference plane; the external excitation source module is used for generating an excitation signal and inputting the excitation signal to the satellite intensive test system, so that the satellite intensive test system is in an external excitation mode; the interference source module is used for generating different interference signals according to different functional indexes of the satellite intensive test system and inputting the interference signals to the satellite intensive test system; the signal measurement module is used for receiving an output signal of the satellite intensive test system and carrying out measurement evaluation to obtain a signal quality characteristic; and the information detection module is used for receiving the output of the satellite intensive test system and making a judgment.

Description

Technical Field

[0001] The present invention relates to the field of calibration technology, and in particular to an overall calibration system and method for a satellite intensive test system. Background Art

[0002] The satellite intensive test system is a necessary test equipment for satellite comprehensive testing, which is used to complete the satellite measurement and control, data transmission and relay subsystem testing. It consists of radio frequency equipment and radio frequency accessories. The radio frequency equipment includes: intensive measurement and control baseband module, intensive link control module, and intensive data transmission module.

[0003] The power divider, attenuator (optional), RF cable and other RF accessories integrated in the satellite intensive test system have clear status in the test system, and the status remains unchanged after the overall calibration. The calibration result corresponds to the entire RF intensive type including the accessories. RF accessories include but are not limited to: satellite-to-ground adapter board, RF cable, power divider, connector, attenuator (optional) and other RF devices. The various devices of the RF intensive type are connected by RF cables.

[0004] At present, the domestic calibration methods for satellite test-specific test equipment and systems rely on measurement stations, which are calibrated according to the calibration specifications jointly compiled by the developer of the special equipment and the measurement station, or the special system composed of general equipment is split into separate equipment, and the equipment is measured separately, and finally the measurement results of each device are added. For these two commonly used special radio frequency specifications, the first approach relies on the metrology personnel to have sufficient understanding of the satellite test-specific equipment to compile qualified calibration specifications. The second method increases the system error, and cannot accurately evaluate the system performance composed of test equipment, and cannot measure system-level indicators that require multiple sets of equipment to be combined. This discovery aims to solve the calibration problem of the dedicated RF test system constructed for satellite testing, and provides a calibration method that is separated from the equipment composition. The system is regarded as a black box, from the source input to the terminal output, and the output response to the input is compared. The output signal quality characteristics and the analysis results of the information flow are judged to obtain the signal processing and data flow processing capabilities of the dedicated test system.

[0005] The survey searched and found the following: "Calibration of Group Delay Parameters of Frequency Conversion Link of Satellite RF Test System Based on Pulse Modulation" compiled by Deng Qianlan and others from Shanghai Precision Metrology and Testing Institute, which mainly studies the calibration method of group delay parameters of frequency conversion link of satellite RF test system, but does not calibrate the function and other performance of the test system; "Research on Field Overall Metrology Calibration Technology of Radar RF Test System" compiled by Lou Hongying from the 14th Institute of China Electronics Technology Group Corporation, which establishes working standards for electrical parameters such as power, amplitude, phase, noise and reflection coefficient corresponding to the radar RF test system by designing and assembling standardized and universal field transfer standard parts, but does not involve the combination of test system calibration process methods and satellite working modes. "Design of Calibration Device for Radio Frequency Non-standard Equipment of a Certain Type of Missile Equipment" compiled by Guo Xiaoran from the Ordnance Technology Research Institute, which provides special calibration methods for special test equipment such as X-band beacon source, RF parameter tester, C-band RF signal repeater and direct wave signal source in the equipment. The "RF System and Method for Polar Phase Distortion Calibration" applied for by N. Rashikalyan et al. of Apple Inc. is a special calibration system and method for reducing the distortion of signals introduced by components on the phase path of the polar architecture of the RF system. It is different from the present invention in that it is aimed at system-level calibration; the "Transmit Power Calibration Method, Calibration System and Wireless RF System" applied for by Quan Zhi et al. of Southern University of Science and Technology obtains an error signal and continuously updates the step size and tap weight coefficient according to the error signal to make the error signal within the allowable error range, thereby adaptively calibrating the transmit power of different hardware devices. The present invention does not require error calculation and directly calibrates system indicators, including but not limited to power. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide an overall calibration system and method for a satellite intensive test system.

[0007] According to the present invention, an overall calibration system of a satellite intensive test system includes: a reference reference source module, an external excitation source module, an interference source module, a signal measurement module and a signal detection module;

[0008] The reference source module is used to generate a reference signal so that the satellite centralized test system, the external excitation source module, the interference source module, and the signal measurement module are on a unified reference plane;

[0009] The external excitation source module is used to generate an excitation signal and input it into the satellite integrated test system to put the satellite integrated test system in an external excitation mode;

[0010] The interference source module is used to generate different interference signals according to different functional indicators of the satellite integrated test system and input them into the satellite integrated test system;

[0011] The signal measurement module is used to receive the output signal of the satellite intensive test system and perform measurement and evaluation to obtain signal quality characteristics;

[0012] The information detection module is used to receive the output of the satellite centralized test system and make a judgment.

[0013] According to an overall calibration method of a satellite intensive test system provided by the present invention, the overall calibration system of the satellite intensive test system performs the following steps:

[0014] Step S1: When the satellite integrated test system is in an internal signal self-closed loop excitation response mode, calibrate the excitation signal generated by the satellite integrated test system and the response to the excitation signal;

[0015] Step S2: When the satellite integrated test system is in the external excitation mode, the response of the satellite integrated test system to the external excitation signal is calibrated.

[0016] Preferably, the step S1 comprises:

[0017] Step S1.1: connect the satellite centralized test system to a closed-loop measurement and control system;

[0018] Step S1.2: transmitting the measurement and control baseband signal stream generated by the satellite intensive test system and the received measurement and control baseband signal stream to the information detection module;

[0019] Step S1.3: using the information detection module to make a decision on the measurement and control baseband signal stream;

[0020] Step S1.4: Connect the satellite centralized test system to a digital transmission closed loop;

[0021] Step S1.5: transmitting the digital transmission baseband information stream generated by the satellite centralized test system and the received digital transmission baseband information stream to the information detection module;

[0022] Step S1.6: Use the information detection module to judge the digital baseband information flow.

[0023] Preferably, the step S1.1 comprises: connecting the measurement and control baseband intermediate frequency output module to the measurement and control up-conversion, connecting the measurement and control up-conversion output to the measurement and control down-conversion, and connecting the measurement and control down-conversion output to the measurement and control baseband intermediate frequency input.

[0024] Preferably, the step S1.3 comprises: using the information detection module to judge the measurement and control baseband signal flow, including: judging the data format and the accuracy of the data content.

[0025] Preferably, the step S1.4 comprises: connecting the digital transmission baseband intermediate frequency output module to the digital transmission up-conversion, connecting the digital transmission up-conversion output to the digital transmission down-conversion, and connecting the digital transmission down-conversion output to the digital transmission baseband intermediate frequency input.

[0026] Preferably, the step S1.6 includes: using the information detection module to judge the digital baseband information stream, including: judging the digital data by bit expansion, judging the accuracy of the frame header, frame synchronization word, data domain data and verifying the calibration items, and statistically counting the increase rules.

[0027] Preferably, step S2 comprises:

[0028] Step S2.1: an external excitation source module generates an excitation signal and inputs it into the satellite integrated test system to put the satellite integrated test system into an external excitation mode;

[0029] Step S2.2: The satellite intensive test system is in the external excitation mode, the link control module telemetry link is connected to the RF input port of the S down-conversion module, and the intermediate frequency output is connected to the intermediate frequency input port of the measurement and control baseband; the intermediate frequency output port of the measurement and control baseband is connected to the intermediate frequency input port of the S up-conversion module, and the RF output port is connected to the uplink output port of the link control module;

[0030] Step S2.3: The link control module adjusts and controls the power amplitude and link status of the RF signal in real time according to the size of the RF signal and the signal limit of the receiving end, and divides the adjusted signal according to a preset ratio to obtain a first signal and a second signal; the first signal is transmitted to the signal measurement module, and the signal measurement module is used to measure and evaluate the output signal of the satellite intensive test system to measure the signal quality characteristics; the second signal is converted into a measurement and control downlink data stream, and sent to the integrated measurement service end to complete telemetry analysis and data stream judgment;

[0031] Step S2.4: The satellite intensive test system is in the external excitation mode, the link control module data transmission link is connected to the X down-conversion and Ka module RF input ports, and the intermediate frequency output is connected to the digital transmission baseband intermediate frequency input port; the RF signal power amplitude and link status are adjusted and controlled, and the adjusted signal is divided according to a preset ratio to obtain a third signal and a fourth signal; the third signal is transmitted to the signal measurement module, and the signal measurement module is used to measure and evaluate the output signal of the satellite intensive test system to measure the signal quality characteristics; the fourth signal is converted into a digital transmission data stream, and sent to the information detection module to complete the business data analysis and judgment.

[0032] Preferably, the calibration items include: telemetry reception, remote control transmission, distance measurement, speed measurement, system insertion loss, system standing wave, gain control range and control accuracy, frequency accuracy, system-level phase noise and spurious suppression ratio, high-speed engineering data reception, demodulation processing and distribution items;

[0033] When the calibration project is an anti-interference project, an interference signal is generated through the interference source module, and the intermediate frequency or radio frequency end is selected to add the interference signal according to the anti-interference project.

[0034] Preferably, the uncertainty of the measurement result is calculated by calibrating the uncertainty of the instrument.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The present invention adopts modular design concept, and through the two modes of internal excitation and internal self-excitation, it traverses the different functions and performance indicators of the satellite intensive test system in various modes; through the common reference of the excitation, interference and measurement modules, it avoids the error caused by the clock and phase difference from affecting the judgment of the calibration result; through the bit-by-bit processing of the information layer, it judges the accuracy and effectiveness of the satellite intensive test system at the data layer.

[0037] 2. The present invention proposes a device and method for measuring and evaluating the functions and performances of a satellite intensive test system. The application direction is the calibration of a satellite radio frequency intensive test system. A calibration result evaluation device, a calibration process, calibration items and a calibration evaluation method are designed. For the first time, system-level calibration of a satellite radio frequency intensive test system is realized.

[0038] 3. The present invention relates to the measurement and evaluation of the entire process of generating signals, responding to external excitation signals and processing information flows by a satellite intensive test system. By generating and controlling external excitation signals and signals generated by the intensive test system itself, collecting responses at the end of the signal flow, and judging the data flow process and results, the measurement and evaluation of the system's linear link, frequency conversion link and information processing capabilities are completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 The figure is a schematic diagram of an overall calibration system of a satellite intensive test system of the present invention.

[0041] Figure 2 The present invention is a flow chart of an overall calibration method of a satellite intensive test system. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] Example 1

[0044] As a special equipment for satellite testing, the satellite intensive test system is used to receive satellite downlink radio frequency signals, including telemetry signals, digital transmission signals and relay signals, and send uplink remote control signals and relay signals. By completing the modulation and demodulation, scrambling and descrambling, synchronization and other processing of the received radio frequency signal at the physical layer, the information flow data produced by the physical layer processing is sent to the corresponding terminal. This test system is a special equipment for satellite testing and has no unified, standard calibration method and calibration system. Satellite test systems in different fields need to formulate calibration specifications according to the characteristics of the system itself, configure transmission parts, and realize the calibration of the system. It does not have universality. When the test system changes according to the changes of the satellite, the calibration standard becomes invalid. In order to solve the problem that the satellite intensive test system, as a special equipment for satellite testing, has no universal calibration method and calibration system, the present invention provides an overall calibration system and method for a satellite intensive test system.

[0045] The overall calibration system of the satellite intensive test system adopts modular and bus interactive design ideas, and traverses different functions and performance indicators in various modes of the satellite intensive test system through two modes: external excitation and internal self-excitation. Through the common reference of the excitation, interference and measurement modules, the error caused by the clock and phase difference is avoided to affect the judgment of the calibration result; through bit-by-bit processing at the information level, the accuracy and effectiveness of the satellite intensive test system at the data level are judged.

[0046] The overall calibration system of the satellite intensive test system is as follows: Figure 1 As shown, including:

[0047] The reference reference source module 101 is used to generate a reference reference. In this embodiment, a reference 10MHz and 1PPS reference signal are generated, and the reference signal is input into the measurement and control function module, the data transmission function module and the frequency conversion function module of the satellite intensive test system, and the reference signal is input into the signal evaluation measurement module, the external excitation source module, and the interference source module;

[0048] The external excitation source module 102 is used to generate an excitation signal and input it into the satellite integrated test system integrated link control, and adjust the signal gain through the link control module. After the link control module is completed, the direction of the control signal is controlled;

[0049] In this embodiment, the external excitation source module 102 generates a single carrier signal input, outputs a measurement and control signal detection, and outputs a digital transmission analog source signal to the satellite intensive test system to measure the RF performance and signal modulation and demodulation functions, scrambling and descrambling functions, etc. The external excitation source module 102 has a standard USB mode, a spread spectrum mode, and a digital transmission mode, wherein the digital transmission includes a variety of modulation modes;

[0050] The interference source module 103 is used to generate interference signals and input them into the satellite intensive test system. According to different functional indicators of the test system, interference signals such as single carrier, spread spectrum signal, Gaussian white noise, etc. are input, and interference can be mixed into the intermediate frequency or radio frequency end;

[0051] In this embodiment, the interference source module 103 generates interference signals in the self-closed loop mode according to the requirements of the calibration project, superimposes them on the normal signals, and verifies the anti-interference ability of the system to be calibrated. It generates spread spectrum signals to interfere with the spread spectrum anti-multiple access ability, outputs white noise to interfere with the data transmission signal, and outputs single carrier interference USB mode.

[0052] The signal measurement module 104 is used to measure and evaluate the output signal of the satellite centralized test system and measure the signal quality characteristics;

[0053] In this embodiment, the signal measurement module 104 includes capturing and displaying the signal frequency characteristics, spectrum shape, amplitude value, phase noise, out-of-band spurious signals, etc. to obtain signal measurement results;

[0054] The information detection module 105 is used to receive the information output by the satellite intensive test system and make judgments, and obtain the message compliance rate through information characteristics such as information format, each field message, and message change rules;

[0055] In this embodiment, the information detection module 105 is used to display and process the data bit by bit, and to make judgments based on the data structure, change rules and other characteristics.

[0056] The satellite intensive test system 106 is the calibrated object, which is used to complete the physical layer processing of the satellite uplink remote control and injection data, and send it to the satellite after up-conversion and gain control; at the same time, it receives the satellite downlink signal, down-converts the signal after completing gain control, performs physical layer analysis on the intermediate frequency signal and outputs the data stream, pushes the low-speed telemetry data link to the integrated measurement server, displays the physical quantity, and performs operations such as formatting on the high-speed business data and distributes it to the corresponding terminal for payload data processing.

[0057] The satellite integrated test system 106 mainly includes an integrated measurement and control module, a frequency conversion module, an integrated link control module, and an integrated data transmission module; the measurement and control module is used to complete low-speed information transmission such as satellite telemetry and remote control; the link control module is used to complete link signal transmission path switching and gain control; the frequency conversion module (the system contains S up-conversion and S down-conversion modules for the measurement and control mode, X / Ka down-conversion modules for the data transmission mode, and a mixing module for the data transmission self-closed loop mode) is used for spectrum shifting, including shifting to high frequency bands and shifting to low frequency bands; the data transmission module is used to realize real-time processing and interaction of high-speed business data.

[0058] The overall calibration method of the satellite intensive test system is to establish a unified reference benchmark for the external excitation source, the object to be calibrated, the interference source, and the signal detection module; construct a signal measurement module and an information detection module to achieve a result evaluation standard that is separated from the test system; and divide the calibration into two modes: the system internal signal self-closed loop excitation response mode and the external excitation mode, and calibrate the signal generated by the system and the response to the external signal respectively. During the calibration process, the radio frequency signal quality characteristics and information analysis results are judged in real time to obtain a judgment and evaluation of the system signal processing and information processing capabilities.

[0059] Specifically, the overall calibration method of the satellite intensive test system is as follows: Figure 2 As shown, including:

[0060] Step 1, connect the satellite intensive test system to the measurement and control closed loop, connect the measurement and control baseband intermediate frequency output module to the measurement and control up-conversion, connect the up-conversion output to the measurement and control down-conversion, and connect the down-conversion output to the measurement and control baseband intermediate frequency input. Set the RF frequencies of the up- and down-conversion modules to the same to achieve signal reception. The measurement and control baseband completes the demodulation of the signal, parses out the telemetry information and the ranging and speed measurement information, and transmits the information to the information detection low-speed module to complete the processing of the telemetry information flow, and displays the telemetry on the display terminal in a beat.

[0061] Step 2: The information detection module determines the information flow sent by the measurement and control baseband to determine the data format and data content accuracy;

[0062] Step 3, the satellite intensive test system is connected in a digital transmission self-closed loop, the digital transmission analog source digital transmission high-order modulation signal, the analog source output intermediate frequency signal is converted into a radio frequency signal by frequency shifting, and output to the digital transmission down-conversion module, the down-conversion output is connected to the digital transmission baseband intermediate frequency input, and the digital transmission baseband information stream is output to the information detection high-speed module;

[0063] Step 4, the information detection module judges the information flow sent by the digital transmission baseband, judges the bit-by-bit expansion of the digital transmission data, judges the accuracy of calibration items such as the frame header, frame synchronization word, data field data, and checksum, and calculates the increase rule of the count;

[0064] Step 5, after completing steps 1 to 4, the satellite intensive test system is changed to receive external excitation mode: the measurement and control part includes: the signal input source end is replaced with the link control module measurement and control telemetry link access to the S down-conversion module RF input port, and the intermediate frequency output is connected to the measurement and control baseband intermediate frequency input port; the measurement and control baseband intermediate frequency output port is connected to the S up-conversion module intermediate frequency input port, and the RF output port is connected to the link control module uplink output port. While ensuring the transmission of the main signal, the measurement and control signal is introduced into the signal detection module according to a certain ratio, and the measurement and control downlink data stream is sent to the comprehensive measurement service end to complete the telemetry analysis and data stream judgment;

[0065] Step 6, after completing steps 1 to 4, the satellite intensive test system is changed to receive external excitation mode: the output part includes: the signal input source end is replaced with the link control module data transmission link access X down-conversion and Ka module RF input port, and the signal is divided into the signal detection module according to a certain proportion, the intermediate frequency output is connected to the digital transmission baseband intermediate frequency input port, and the digital transmission data stream is sent to the information detection high-speed module to complete the business data analysis and judgment;

[0066] Step 7, during the implementation of Step 5 and Step 6, the link control module adjusts and controls the signal power amplitude and link status in real time according to the signal size and the signal limit of the receiving end, and inputs the signals to the signal measurement module according to a certain ratio;

[0067] Step 8, traverse the calibration items, telemetry reception, remote control transmission, distance measurement, speed measurement, system insertion loss, system standing wave, system gain control range and control accuracy, system frequency accuracy, system, phase noise and spurious suppression ratio, high-speed engineering data reception, demodulation processing and distribution and other items.

[0068] Calibration items include but are not limited to: 1) The measurement and control system completes satellite telemetry analysis such as modulation, demodulation, distance measurement, speed measurement, remote control packaging transmission, program control, data transmission and bit error rate verification; 2) The data transmission system completes satellite data analysis such as demodulation and decoding, data transmission and bit error rate verification, and has the function of simulating satellite data modulation and coding; 3) Performance calibration includes standing wave ratio, insertion loss, frequency accuracy, attenuation accuracy, phase noise and spurious suppression ratio;

[0069] Step 9, add the introduction of interference signal to the anti-interference project in step 8, scramble the spread spectrum signal in the spread spectrum anti-interference calibration project, add a single carrier signal in USB communication mode, and add Gaussian white noise at the intermediate frequency end in high-throughput business data, so that the bit error rate is in the order of 10-7, and check the signal-to-noise ratio at this time.

[0070] Add the introduction of interference signals to the anti-interference project in step 8, select the IF and RF ends to add interference signals according to the test items, use Gaussian white noise interference for data transmission, and use spread spectrum interference signals or single carrier interference signals for measurement and control, and obtain the calibration results according to the measurement module;

[0071] Step 10, after completing steps 1-9, the calibration result is obtained, and the uncertainty of the measurement result is obtained by calculating the uncertainty of the calibration instrument.

[0072] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0073] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An overall calibration system for a satellite intensive test system, characterized in that: include: Reference reference source module, external excitation source module, interference source module, signal measurement module and signal detection module; The reference source module is used to generate a reference signal so that the satellite centralized test system, the external excitation source module, the interference source module, and the signal measurement module are on a unified reference plane; The external excitation source module is used to generate an excitation signal and input it into the satellite integrated test system to put the satellite integrated test system in an external excitation mode; The interference source module is used to generate different interference signals according to different functional indicators of the satellite integrated test system and input them into the satellite integrated test system; The signal measurement module is used to receive the output signal of the satellite intensive test system and perform measurement and evaluation to obtain signal quality characteristics; The information detection module is used to receive the output of the satellite centralized test system and make a judgment.

2. A method for calibrating a satellite intensive test system, characterized in that: The overall calibration system of the satellite intensive test system according to claim 1 performs the following steps: Step S1: When the satellite integrated test system is in an internal signal self-closed loop excitation response mode, calibrate the excitation signal generated by the satellite integrated test system and the response to the excitation signal; Step S2: When the satellite integrated test system is in the external excitation mode, the response of the satellite integrated test system to the external excitation signal is calibrated.

3. The overall calibration method of the satellite intensive test system according to claim 2, characterized in that: The step S1 comprises: Step S1.1: connect the satellite centralized test system to a closed-loop measurement and control system; Step S1.2: transmitting the measurement and control baseband signal stream generated by the satellite intensive test system and the received measurement and control baseband signal stream to the information detection module; Step S1.3: using the information detection module to make a decision on the measurement and control baseband signal stream; Step S1.4: Connect the satellite centralized test system to a digital transmission closed loop; Step S1.5: transmitting the digital transmission baseband information stream generated by the satellite centralized test system and the received digital transmission baseband information stream to the information detection module; Step S1.6: Use the information detection module to judge the digital baseband information flow.

4. The overall calibration method of the satellite intensive test system according to claim 3 is characterized in that: The step S1.1 includes: connecting the measurement and control baseband intermediate frequency output module to the measurement and control up-conversion, connecting the measurement and control up-conversion output to the measurement and control down-conversion, and connecting the measurement and control down-conversion output to the measurement and control baseband intermediate frequency input.

5. The overall calibration method of the satellite intensive test system according to claim 3, characterized in that: The step S1.3 includes: using the information detection module to judge the measurement and control baseband signal flow, including: judging the data format and the accuracy of the data content.

6. The overall calibration method of the satellite intensive test system according to claim 3, characterized in that: The step S1.4 includes: connecting the digital transmission baseband intermediate frequency output module to the digital transmission up-conversion, connecting the digital transmission up-conversion output to the digital transmission down-conversion, and connecting the digital transmission down-conversion output to the digital transmission baseband intermediate frequency input.

7. The overall calibration method of the satellite intensive test system according to claim 3, characterized in that: The step S1.6 includes: using the information detection module to judge the digital baseband information stream, including: judging the digital data by bit expansion, judging the accuracy of the frame header, frame synchronization word, data field data, and verifying the accuracy of calibration items, and statistically counting the increase rules.

8. The overall calibration method of the satellite intensive test system according to claim 2, characterized in that: The step S2 comprises: Step S2.1: an external excitation source module generates an excitation signal and inputs it into the satellite integrated test system to put the satellite integrated test system into an external excitation mode; Step S2.2: The satellite intensive test system is in the external excitation mode, the link control module telemetry link is connected to the RF input port of the S down-conversion module, and the intermediate frequency output is connected to the intermediate frequency input port of the measurement and control baseband; the intermediate frequency output port of the measurement and control baseband is connected to the intermediate frequency input port of the S up-conversion module, and the RF output port is connected to the uplink output port of the link control module; Step S2.3: The link control module adjusts and controls the power amplitude and link status of the RF signal in real time according to the size of the RF signal and the signal limit of the receiving end, and divides the adjusted signal according to a preset ratio to obtain a first signal and a second signal; the first signal is transmitted to the signal measurement module, and the signal measurement module is used to measure and evaluate the output signal of the satellite intensive test system to measure the signal quality characteristics; the second signal is converted into a measurement and control downlink data stream, and sent to the integrated measurement service end to complete telemetry analysis and data stream judgment; Step S2.4: The satellite intensive test system is in the external excitation mode, the link control module data transmission link is connected to the X down-conversion and Ka module RF input ports, and the intermediate frequency output is connected to the digital transmission baseband intermediate frequency input port; the RF signal power amplitude and link status are adjusted and controlled, and the adjusted signal is divided according to a preset ratio to obtain a third signal and a fourth signal; the third signal is transmitted to the signal measurement module, and the signal measurement module is used to measure and evaluate the output signal of the satellite intensive test system to measure the signal quality characteristics; the fourth signal is converted into a digital transmission data stream, and sent to the information detection module to complete the business data analysis and judgment.

9. The overall calibration method of the satellite intensive test system according to claim 2, characterized in that: Calibration items include: telemetry reception, remote control transmission, distance measurement, speed measurement, system insertion loss, system standing wave, gain control range and control accuracy, frequency accuracy, system-level phase noise and spurious suppression ratio, high-speed engineering data reception, demodulation processing and distribution projects; When the calibration project is an anti-interference project, an interference signal is generated through the interference source module, and the intermediate frequency or radio frequency end is selected to add the interference signal according to the anti-interference project.

10. The overall calibration method of the satellite intensive test system according to claim 2, characterized in that: The uncertainty of the measurement result is calculated by the uncertainty of the calibration instrument.

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