CN103675776B - Frequency spectrum parameter proving installation and method in digital array module transmission channel arteries and veins - Google Patents
Frequency spectrum parameter proving installation and method in digital array module transmission channel arteries and veins Download PDFInfo
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- CN103675776B CN103675776B CN201310683774.4A CN201310683774A CN103675776B CN 103675776 B CN103675776 B CN 103675776B CN 201310683774 A CN201310683774 A CN 201310683774A CN 103675776 B CN103675776 B CN 103675776B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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Abstract
The invention provides a kind of frequency spectrum parameter proving installation and method in digital array module transmission channel arteries and veins, method comprises the steps: to set up a status control module based on FPGA; At the rising edge of clock signal, status control module is controlled by the duty of optical module to digital array module, make status control module export the road pulse signal synchronous with digital array module duty simultaneously, be tie with synchronizing signal, set up the synchronized relation between digital array module and spectrum analyzer; The test of frequency spectrum parameter in the time gate functional realiey arteries and veins utilizing spectrum analyzer under the switching and conditioning of switching network.The present invention by build synchronization mechanism and introduce time gate test solve digital array module self there is no synchronizing signal prerequisite under arteries and veins in frequency spectrum parameter test.
Description
Technical field
The invention belongs to technical field of measurement and test, in particular frequency spectrum parameter proving installation and method in a kind of digital array module transmission channel arteries and veins.
Background technology
Digital array module is the Multichannel radar transmit/receive module of a Digital Microwave mixing, entirety presents fiberize, digitizing and integrated distinguishing feature, is functionally equivalent to the simulation T/R assembly of traditional phased-array radar, phase shifter, front front end, frequency source extension set, receives the comprehensive of extension set and a part of digital signal processing extension set.Owing to have employed based on the waveform generation technique of DDS and a large amount of new technology such as accurate width phase control technology, the multichannel digital reception technique based on DDC, integrated integrated transceiver channel designing technique and high-speed high capacity data transmission technology and new technology, no matter from the angle of technical system, or from the angle of implementation, digital array module is all once leap and the revolution in T/R assembly field.
Compared with simulation T/R assembly, as shown in Figure 1, digital array module has larger difference in many aspects such as the output signal type of transmission channel, transmission channel input signal types, state control realization mode, phase shift implementation and T/R number of active lanes.
Specific to frequency spectrum parameter test in transmission channel arteries and veins, although both transmitting is pulse-modulated signal, what digital array module was correlated with simulation T/R assembly is differently mainly reflected in:
1) digital array module transmission channel does not have analog radio frequency input signal, just by Optical Fiber Transmission Wave data and order
2) digital array module self does not have synchronizing signal I/O yet
Digital array module is a brand-new things, and its relevant method of testing is all groped in process in research.And for frequency spectrum parameter method of testing in simulation T/R assembly transmission channel arteries and veins be, as shown in Figure 1: AWG (Arbitrary Waveform Generator) provides in order to synchronous leading signal, digital I/O then provides Transmit enable, a facies-controlled digital signal, radio-frequency signal generator exports the pumping signal of pulsed modulation form, and transmitting of simulating that T/R assembly exports is carried out inputing in spectrum analyzer after decay and test channel selection etc. are nursed one's health through switching network.In view of transmitting as pulse-modulated signal, therefore, need the pulse synchronous signal of leading signal or radio-frequency signal generator output AWG (Arbitrary Waveform Generator) exported as the external trigger signal of spectrum analyzer, then utilize time gate function can realize the test of frequency spectrum parameter in arteries and veins.
In fact, the key for frequency spectrum parameter test in pulse-modulated signal arteries and veins will have external trigger signal exactly, otherwise the parameters such as time delay just cannot be arranged, and naturally also just cannot complete test.
Therefore, prior art existing defects, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, provides a kind of frequency spectrum parameter proving installation and method in digital array module transmission channel arteries and veins.
Technical scheme of the present invention is as follows:
Frequency spectrum parameter proving installation in a kind of digital array module transmission channel arteries and veins, wherein, comprises status control module, digital array module, switching network and spectrum analyzer; Described status control module, is connected with digital array module by optical fiber, realizes the working state control of digital array module; Described digital array module, the output port that transmits for the input port with digital array module that realize described switching network is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realize transmitting decay, transmit and the selection of test path between spectrum analyzer; The external trigger port of described spectrum analyzer is connected with status control module synchronous signal output end mouth, the rf inputs mouth of described spectrum analyzer is connected with the output port of switching network, for realizing the test of frequency spectrum parameter in arteries and veins under time gate pattern.
Described proving installation, wherein, described status control module comprises FPGA, optical module and DAC chip; Described FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and described status control module connects spectrum analyzer external trigger input port by DAC chip simultaneously; Described FPGA, for realize state control and synchronous required order, data and timestamp information output; Described optical module, for realizing the opto-electronic conversion of FPGA output signal; Described DAC chip, for realizing the output of synchronizing signal.
Described proving installation, wherein, described status control module synchronizing signal, synchronous for what realize between digital array module and spectrum analyzer.
Described proving installation, wherein, described synchronizing signal and described transmit between time delay be by good digital oscillograph carry out test obtain.
Described proving installation, wherein, arranges spectrum analyzer time gate width according to the pulsewidth transmitted, and time gate width is 1/4 ~ 1/2 pulsewidth transmitted.
Frequency spectrum parameter method of testing in a kind of digital array module transmission channel arteries and veins, wherein, comprises the following steps:
Step 1: set up a status control module, status control module comprises FPGA, optical module and DAC chip; FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and FPGA connects spectrum analyzer external trigger input port by DAC chip simultaneously;
Step 2: at the rising edge of clock signal, status control module is controlled by the duty of optical module to digital array module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, status control module is made to export the road pulse signal synchronous with digital array module duty, pulse signal status control module exported, as the external trigger input signal of spectrum analyzer, sets up synchronized relation between digital array module and spectrum analyzer;
Step 3: what the multichannel of digital array module transmitted inputs to spectrum analyzer rf inputs mouth after switching network decay and test channel are selected;
Step 4: the time delay arranging spectrum analyzer according to synchronizing signal and the time delay between transmitting, simultaneously according to the pulsewidth setup times gate-width degree transmitted, time gate width is 1/4 ~ 1/2 pulsewidth transmitted;
Step 5: utilize spectrum analyzer to obtain in transmission channel arteries and veins the frequency spectrum parameter indexs such as signal to noise ratio.
In described step 4, described synchronizing signal and described transmit between time delay be by good digital oscillograph carry out test obtain.
Adopt such scheme, 1, take full advantage of requisite status control module in test process, increase synchronizing signal output function on this basis, achieve the synchronous of measured number array module and spectrum analyzer; 2, take full advantage of the pulse-modulated signal test function of spectrum analyzer based on time gate, this is also the important ring realizing test.
Accompanying drawing explanation
Fig. 1 simulates frequency spectrum parameter test block diagram in T/R assembly transmission channel arteries and veins in prior art.
Fig. 2 is that in digital array module transmission channel arteries and veins of the present invention, frequency spectrum parameter test synchronously realizes block diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 2, frequency spectrum parameter proving installation in a kind of digital array module transmission channel arteries and veins, wherein, comprises status control module, digital array module, switching network and spectrum analyzer; Described status control module, is connected with digital array module by optical fiber, realizes the working state control of digital array module; Described digital array module, the output port that transmits for the input port with digital array module that realize described switching network is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realize transmitting decay, transmit and the selection of test path between spectrum analyzer; The external trigger port of described spectrum analyzer is connected with status control module synchronous signal output end mouth, the rf inputs mouth of described spectrum analyzer is connected with the output port of switching network, for realizing the test of frequency spectrum parameter in arteries and veins under time gate pattern.
Preferably, described status control module comprises FPGA, optical module and DAC chip; Described FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and described status control module connects spectrum analyzer external trigger input port by DAC chip simultaneously; Described FPGA, for realize state control and synchronous required order, data and timestamp information output; Described optical module, for realizing the opto-electronic conversion of FPGA output signal; Described DAC chip, for realizing the output of synchronizing signal.
Preferably, described status control module synchronizing signal, synchronous for what realize between digital array module and spectrum analyzer.
Preferably, described synchronizing signal and described transmit between time delay be by good digital oscillograph carry out test obtain.
Preferably, arrange spectrum analyzer time gate width according to the pulsewidth transmitted, time gate width is 1/4 ~ 1/2 pulsewidth transmitted.
In above-mentioned, 1, digital array module transmission channel do not have analog radio frequency input signal, just by Optical Fiber Transmission Wave data and order; 2, digital array module self does not have synchronizing signal I/O yet.
On the basis of the above, frequency spectrum parameter method of testing in a kind of digital array module transmission channel arteries and veins, wherein, comprises the following steps:
Step 1: set up a status control module, status control module comprises FPGA, optical module and DAC chip; FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and FPGA connects spectrum analyzer external trigger input port by DAC chip simultaneously;
Step 2: at the rising edge of clock signal, status control module is controlled by the duty of optical module to digital array module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, status control module is made to export the road pulse signal synchronous with digital array module duty, pulse signal status control module exported, as the external trigger input signal of spectrum analyzer, sets up synchronized relation between digital array module and spectrum analyzer;
Step 3: what the multichannel of digital array module transmitted inputs to spectrum analyzer rf inputs mouth after switching network decay and test channel are selected;
Step 4: the time delay arranging spectrum analyzer according to synchronizing signal and the time delay between transmitting, simultaneously according to the pulsewidth setup times gate-width degree transmitted, time gate width is 1/4 ~ 1/2 pulsewidth transmitted;
Step 5: utilize spectrum analyzer to obtain in transmission channel arteries and veins the frequency spectrum parameter indexs such as signal to noise ratio.
In described step 4, described synchronizing signal and described transmit between time delay be by good digital oscillograph carry out test obtain.
Adopt such scheme, 1, take full advantage of requisite status control module in test process, increase synchronizing signal output function on this basis, achieve the synchronous of measured number array module and spectrum analyzer; 2, take full advantage of the pulse-modulated signal test function of spectrum analyzer based on time gate, this is also the important ring realizing test.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (1)
1. a frequency spectrum parameter proving installation in digital array module transmission channel arteries and veins, is characterized in that, comprises status control module, digital array module, switching network and spectrum analyzer; Described status control module, is connected with digital array module by optical fiber, realizes the working state control of digital array module; Described digital array module, the output port that transmits for the input port with digital array module that realize described switching network is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realize transmitting decay, transmit and the selection of test path between spectrum analyzer; The external trigger port of described spectrum analyzer is connected with status control module synchronous signal output end mouth, the rf inputs mouth of described spectrum analyzer is connected with the output port of switching network, for realizing the test of frequency spectrum parameter in arteries and veins under time gate pattern, described status control module comprises FPGA, optical module and DAC chip; Described FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and described status control module connects spectrum analyzer external trigger input port by DAC chip simultaneously; Described FPGA, for realize state control and synchronous required order, data and timestamp information output; Described optical module, for realizing the opto-electronic conversion of FPGA output signal; Described DAC chip, for realizing the output of synchronizing signal, described status control module synchronizing signal, synchronous for what realize between digital array module and spectrum analyzer, described synchronizing signal and described transmit between time delay be by good digital oscillograph carry out test obtain, according to the pulsewidth transmitted, spectrum analyzer time gate width is set, time gate width is 1/4 ~ 1/2 pulsewidth transmitted, frequency spectrum parameter proving installation method of testing in described digital array module transmission channel arteries and veins, comprises the following steps:
Step 1: set up a status control module, status control module comprises FPGA, optical module and DAC chip; FPGA connects digital array module by optical module, and described digital array module connects spectrum analyzer by switching network again, and FPGA connects spectrum analyzer external trigger input port by DAC chip simultaneously;
Step 2: at the rising edge of clock signal, status control module is controlled by the duty of optical module to digital array module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, status control module is made to export the road pulse signal synchronous with digital array module duty, pulse signal status control module exported, as the external trigger input signal of spectrum analyzer, sets up synchronized relation between digital array module and spectrum analyzer;
Step 3: the multichannel of digital array module is transmitted through switching network decay and test channel selection after input to spectrum analyzer rf inputs mouth;
Step 4: the time delay arranging spectrum analyzer according to synchronizing signal and the time delay between transmitting, simultaneously according to the pulsewidth setup times gate-width degree transmitted, time gate width is 1/4 ~ 1/2 pulsewidth transmitted;
Step 5: utilize spectrum analyzer to obtain signal to noise ratio frequency spectrum parameter index in transmission channel arteries and veins, described synchronizing signal and described transmit between time delay be carry out test acquisition by good digital oscillograph.
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| CN108039909B (en) * | 2017-10-17 | 2019-09-20 | 厦门市迅光电子有限公司 | Townhouse audio optical fibre transmitting chip detection device and method |
| CN107831477A (en) * | 2017-10-20 | 2018-03-23 | 北京无线电测量研究所 | A kind of digital transmitting and receiving component Auto-Test System |
| CN109639403A (en) * | 2018-11-26 | 2019-04-16 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of synchronous transfer digital array antenna base band excited data |
| CN109656176A (en) * | 2018-12-26 | 2019-04-19 | 中电科仪器仪表有限公司 | A kind of oscillograph control panel circuit and its control method and oscillograph |
| CN111505593B (en) * | 2020-04-30 | 2022-03-29 | 北京无线电测量研究所 | Frequency synthesis comprehensive test system and test method |
| CN111953412B (en) * | 2020-08-07 | 2022-03-08 | 苏州浪潮智能科技有限公司 | Method and device for realizing optical information synchronization of optical module switch |
| CN112181048A (en) * | 2020-09-15 | 2021-01-05 | 中国人民解放军国防科技大学 | Time sequence alignment system and alignment method between large array devices |
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