CN103675776A - In-pulse frequency spectrum parameter testing device and method for emission channel of digital array module - Google Patents
In-pulse frequency spectrum parameter testing device and method for emission channel of digital array module Download PDFInfo
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- CN103675776A CN103675776A CN201310683774.4A CN201310683774A CN103675776A CN 103675776 A CN103675776 A CN 103675776A CN 201310683774 A CN201310683774 A CN 201310683774A CN 103675776 A CN103675776 A CN 103675776A
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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 an in-pulse frequency spectrum parameter testing device and method for an emission channel of a digital array module. The method comprises the following steps that a state control module based on an FPGA is established; the state control module controls the working state of the digital array module through an optical module at the rising edge of a clock signal; meanwhile, the state control module is made to output a pulse signal synchronous with the working state of the digital array module, and a synchronous relation between the digital array module and a frequency spectrum analyzer is established with the synchronizing signal as a link; under the switching and conditioning action of a switching network, the time gate function of the frequency spectrum analyzer is used for testing in-pulse frequency spectrum parameters. According to the in-pulse frequency spectrum parameter testing device and method for the emission channel of the digital array module, a synchronization mechanism is constructed, a time gate test is introduced, and therefore the testing of the in-pulse frequency spectrum parameters on the premise that the digital array module does not have a synchronizing signal is realized.
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 that a Digital Microwave is mixed, integral body presents fiberize, digitizing and integrated distinguishing feature, in function, be equivalent to traditional phased-array radar simulation T/R assembly, phase shifter, front front end, frequency source extension set, receive the comprehensive of extension set and a part of digital signal processing extension set.Owing to having adopted waveform generation technology based on DDS and accurately a large amount of new technologies such as 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.
Compare with simulation T/R assembly, as shown in Figure 1, digital array module in output signal type, the transmission channel input signal types of transmission channel, state is controlled the many aspects such as implementation, phase shift implementation and T/R number of active lanes larger difference.
Specific to frequency spectrum parameter test in transmission channel arteries and veins, although both transmitting is pulse-modulated signal, different being mainly reflected in that digital array module is relevant from simulation T/R assembly:
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 provides Transmit enable, a facies-controlled digital signal, the pumping signal of radio-frequency signal generator output pulsed modulation form, and the output of simulation T/R assembly transmit through switching network decay with the conditioning such as test channel selection after input in spectrum analyzer.In view of transmitting as pulse-modulated signal, therefore, the pulse synchronous signal of the leading signal that AWG (Arbitrary Waveform Generator) need to be exported or radio-frequency signal generator output, as the external trigger signal of spectrum analyzer, then utilizes time gate function can realize the test of frequency spectrum parameter in arteries and veins.
In fact, for the key of 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 arrange, naturally also just cannot complete test.
Therefore, there is defect in prior art, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, and frequency spectrum parameter proving installation and method in a kind of digital array module transmission channel arteries and veins are provided.
Technical scheme of the present invention is as follows:
A frequency spectrum parameter proving installation in 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, for realizing the input port of described switching network and the output port that transmits of digital array module is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realizing the decay that transmits, transmit and spectrum analyzer between the selection of test path; 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 realizing that state is controlled and the output of synchronous required order, data and timestamp information; 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, for realizing synchronous between digital array module and spectrum analyzer.
Described proving installation, wherein, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
Described proving installation, wherein, arranges spectrum analyzer time gate width according to the pulsewidth transmitting, and time gate width is 1/4～1/2 pulsewidth transmitting.
A frequency spectrum parameter method of testing in 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 the duty of digital array module by optical module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, make status control module export the pulse signal of synchronizeing with digital array module duty in a road, external trigger input signal using the pulse signal of status control module output as spectrum analyzer is set up synchronized relation between digital array module and spectrum analyzer;
Step 3: what the multichannel of digital array module was transmitted inputs to spectrum analyzer rf inputs mouth after switching network decay and test channel selection;
Step 4: the time delay according to synchronizing signal and between transmitting arranges the time delay of spectrum analyzer, according to the pulsewidth setup times gate-width degree transmitting, time gate width is 1/4～1/2 pulsewidth transmitting simultaneously;
Step 5: utilize spectrum analyzer to obtain the frequency spectrum parameter indexs such as the interior signal to noise ratio of transmission channel arteries and veins.
In described step 4, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
Adopt such scheme, 1, take full advantage of requisite status control module in test process, increase on this basis synchronizing signal output function, realized 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 an important ring of 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, for realizing the input port of described switching network and the output port that transmits of digital array module is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realizing the decay that transmits, transmit and spectrum analyzer between the selection of test path; 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 realizing that state is controlled and the output of synchronous required order, data and timestamp information; 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, for realizing synchronous between digital array module and spectrum analyzer.
Preferably, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
Preferably, according to the pulsewidth transmitting, spectrum analyzer time gate width is set, time gate width is 1/4～1/2 pulsewidth transmitting.
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 foregoing, 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 the duty of digital array module by optical module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, make status control module export the pulse signal of synchronizeing with digital array module duty in a road, external trigger input signal using the pulse signal of status control module output as spectrum analyzer is set up synchronized relation between digital array module and spectrum analyzer;
Step 3: what the multichannel of digital array module was transmitted inputs to spectrum analyzer rf inputs mouth after switching network decay and test channel selection;
Step 4: the time delay according to synchronizing signal and between transmitting arranges the time delay of spectrum analyzer, according to the pulsewidth setup times gate-width degree transmitting, time gate width is 1/4～1/2 pulsewidth transmitting simultaneously;
Step 5: utilize spectrum analyzer to obtain the frequency spectrum parameter indexs such as the interior signal to noise ratio of transmission channel arteries and veins.
In described step 4, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
Adopt such scheme, 1, take full advantage of requisite status control module in test process, increase on this basis synchronizing signal output function, realized 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 an important ring of realizing test.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (7)
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, for realizing the input port of described switching network and the output port that transmits of digital array module is connected, the output port of described switching network is connected with the input port of spectrum analyzer, for realizing the decay that transmits, transmit and spectrum analyzer between the selection of test path; 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.
2. proving installation as claimed in claim 1, is characterized in that, 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 realizing that state is controlled and the output of synchronous required order, data and timestamp information; Described optical module, for realizing the opto-electronic conversion of FPGA output signal; Described DAC chip, for realizing the output of synchronizing signal.
3. proving installation as claimed in claim 1, is characterized in that, described status control module synchronizing signal, for realizing synchronous between digital array module and spectrum analyzer.
4. proving installation as claimed in claim 1, is characterized in that, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
5. proving installation as claimed in claim 1, is characterized in that, according to the pulsewidth transmitting, spectrum analyzer time gate width is set, and time gate width is 1/4～1/2 pulsewidth transmitting.
6. a frequency spectrum parameter method of testing in digital array module transmission channel arteries and veins as claimed in claim 1, is characterized in that, 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 the duty of digital array module by optical module, synchronous signal transmission data send to the DAC chip in status control module simultaneously, make status control module export the pulse signal of synchronizeing with digital array module duty in a road, external trigger input signal using the pulse signal of status control module output as spectrum analyzer is set up synchronized relation between digital array module and spectrum analyzer;
Step 3: what the multichannel of digital array module was transmitted inputs to spectrum analyzer rf inputs mouth after switching network decay and test channel selection;
Step 4: the time delay according to synchronizing signal and between transmitting arranges the time delay of spectrum analyzer, according to the pulsewidth setup times gate-width degree transmitting, time gate width is 1/4～1/2 pulsewidth transmitting simultaneously;
Step 5: utilize spectrum analyzer to obtain the frequency spectrum parameter indexs such as the interior signal to noise ratio of transmission channel arteries and veins.
7. method of testing as claimed in claim 6, is characterized in that, in described step 4, described synchronizing signal and described in time delay between transmitting be to test acquisition by high-performance digital oscilloscope.
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| CN108039909A (en) * | 2017-10-17 | 2018-05-15 | 厦门市迅光电子有限公司 | Townhouse audio optical fibre transmitting chip detection device and method |
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| 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 |
| CN111505593A (en) * | 2020-04-30 | 2020-08-07 | 北京无线电测量研究所 | Frequency synthesis comprehensive test system and test method |
| 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 |
| CN111953412A (en) * | 2020-08-07 | 2020-11-17 | 苏州浪潮智能科技有限公司 | Method and device for realizing optical information synchronization of optical module switch |
| 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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