CN107817479A - A kind of test system and method for high power digital transmitting-receiving subassembly noise coefficient - Google Patents
A kind of test system and method for high power digital transmitting-receiving subassembly noise coefficient Download PDFInfo
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- CN107817479A CN107817479A CN201710978786.8A CN201710978786A CN107817479A CN 107817479 A CN107817479 A CN 107817479A CN 201710978786 A CN201710978786 A CN 201710978786A CN 107817479 A CN107817479 A CN 107817479A
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- high power
- receiving subassembly
- digital transmitting
- signal
- power digital
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Classifications
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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
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
Abstract
The invention discloses a kind of test system and method for high power digital transmitting-receiving subassembly noise coefficient, the wherein optical fiber test equipment of system, do not received under analog echo signal state for receiving tested high power digital transmitting-receiving subassembly, first base band echo data of output, the average noise power of tested high power digital transmitting-receiving subassembly is determined according to the first base band echo data；Reception is stated tested high power digital transmitting-receiving subassembly and received under analog echo signal state, second base band echo data of output, determine the power output of signal output apparatus and the signal power of the second base band echo data, signal gain is determined according to power output and signal power, and determines the three dB bandwidth of base band echo data；Optical fiber test equipment, for determining the noise coefficient of tested high power digital transmitting-receiving subassembly according to average noise power, signal gain and three dB bandwidth combination noise coefficient formula.Said system solves the problems, such as that the noise coefficient index of current high power digital transmitting-receiving subassembly can not measure.
Description
Technical field
The present invention is to belong to gadget field, more particularly to a kind of test of high power digital transmitting-receiving subassembly noise coefficient
System and method.
Background technology
High power digital transmitting-receiving subassembly is the important component of array radar, and its performance indications directly affects the property of radar
Energy, power and cost.Whether meet technique and tactics requirement for checking radar system, except the transmission power for digital transmitting and receiving component
Measure outer, it is also necessary to pay close attention to the noise coefficient of each receiving channel.At present, due to the transmitting work(of digital transmitting and receiving component
Rate is typically larger than 100W, and it is received and dispatched after port must access more than 30dB attenuator and can just tested, and used in testing
Noise source ENR (excess noise ratio) is no more than 20dB, and the noises from noise sources power after attenuator 30dB decay is received close to numeral
The bottom power of making an uproar of component receiving channel is sent out, therefore leads to not complete noise-factor measurement test.
The content of the invention
For above-mentioned technical problem, the present invention, which provides one kind, can effectively solve current high power digital transmitting-receiving subassembly using big
Power attenuator is matched, and causes noise coefficient index can not measure the high power digital transmitting-receiving subassembly noise coefficient of problem
Test system and method.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of high power digital transmitting-receiving group is provided
The test system of part noise coefficient, including tested high power digital transmitting-receiving subassembly and the tested high power digital transmitting-receiving subassembly
The signal output apparatus for being used to export analog echo signal of connection and the break-make light for controlling the analog echo signal
Fine test equipment, the signal output apparatus are connected with the optical fiber test equipment；
The optical fiber test equipment, the analogue echo is not received for receiving the tested high power digital transmitting-receiving subassembly
Under signal condition, the first base band echo data of output, determined according to the first base band echo data described tested high-power
The average noise power of digital transmitting and receiving component；
State tested high power digital transmitting-receiving subassembly described in reception to receive under the analog echo signal state, the second of output
Base band echo data, determine the power output of the signal output apparatus and the signal work(of the second base band echo data
Rate, signal gain is determined according to the power output and the signal power, and determine the 3dB bands of the base band echo data
It is wide；
The optical fiber test equipment, it is additionally operable to determine the tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Noise coefficient；
Wherein：PNoiseThe average noise work(under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is that tested high power digital is received and dispatched
Component receives the three dB bandwidth under analog echo signal state.
The present invention uses above technical scheme, and the technique effect reached is：Connect by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, it is determined that the average noise work(of tested high power digital transmitting-receiving subassembly
Rate, do not receive the second base band echo data under analog echo signal state by tested high power digital transmitting-receiving subassembly, it is determined that
Signal gain and three dB bandwidth, in conjunction with noise coefficient formula, it can effectively calculate tested high power digital transmitting-receiving subassembly
Noise coefficient.The systems and methods, by signal source and optical fiber test equipment, solves current high power digital transmitting-receiving subassembly
Matched using high power attenuator, the problem of causing noise coefficient index not measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicality.
More preferably, in the above-mentioned technical solutions, the signal output apparatus includes receiving and dispatching with the tested high power digital
The high power attenuator of component connection and the signal source being connected with the high power attenuator and optical fiber test equipment；
The signal source, for the analog echo signal of generation to be exported to the high power attenuator；
The high power attenuator, for decaying to the analog echo signal, and by the analogue echo after decay
Signal is sent to the tested high power digital transmitting-receiving subassembly.
More preferably, in the above-mentioned technical solutions, the system also includes and the signal source, the tested high power digital
Transmitting-receiving subassembly and the frequency synthesizer of optical fiber test equipment connection；
The frequency synthesizer, for providing coherent reference clock for the signal source, being that the optical fiber test equipment carries
Local oscillation signal is provided for sampled reference clock, for the tested high power digital transmitting-receiving subassembly.
More preferably, in the above-mentioned technical solutions, the system also include with the signal source, the optical fiber test equipment with
And the router of the frequency synthesizer connection；
The router, for forwarding the optical fiber test equipment to send to the frequency synthesizer and the signal source
Control instruction.
A kind of method of testing of high power digital transmitting-receiving subassembly noise coefficient is additionally provided, is comprised the following steps：
Step S10：Obtain tested high power digital transmitting-receiving subassembly and do not receive first exported under analog echo signal state
Base band echo data, the average noise of the tested high power digital transmitting-receiving subassembly is determined according to the first base band echo data
Power；
Step S20：Obtain tested high power digital transmitting-receiving subassembly and receive the second base exported under analog echo signal state
Band echo data, and the power output of original analog echo-signal, according to the second base band echo data, determine the base
Signal power with echo data and 3dB broadbands；
And the signal gain of the base band echo data is determined according to the power output and the signal power；
Step S30：According to noise coefficient formula, the noise coefficient of the tested high power digital transmitting-receiving subassembly is determined.
Invention uses above technical scheme, and the technique effect reached is：Received by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state, it is determined that the average noise work(of tested high power digital transmitting-receiving subassembly
Rate, do not receive the second base band echo data under analog echo signal state by tested high power digital transmitting-receiving subassembly, it is determined that
Signal gain and three dB bandwidth, in conjunction with noise coefficient formula, it can effectively calculate tested high power digital transmitting-receiving subassembly
Noise coefficient.The systems and methods, by signal source and optical fiber test equipment, solves current high power digital transmitting-receiving subassembly
Matched using high power attenuator, the problem of causing noise coefficient index not measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicality.
More preferably, in the above-mentioned technical solutions, it is described to obtain tested high power digital transmitting-receiving subassembly reception analogue echo letter
The the second base band echo data exported under number state, and the power output of original analog echo-signal, specifically include following step
Suddenly：
Step S21：Generate analog echo signal；
Step S22：The analog echo signal is decayed, and the analog echo signal after decay is sent to described
Tested high power digital transmitting-receiving subassembly；
Step S23：Receive the second base band echo data that the tested high power digital transmitting-receiving subassembly is sent；
Step S24：Obtain the power output of the analog echo signal.
More preferably, in the above-mentioned technical solutions, the noise coefficient formula is：
Wherein：PNoiseThe average noise work(under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the schematic frame diagram of test system of high power digital transmitting-receiving subassembly noise coefficient provided by the invention；
Fig. 2 is the indicative flowchart of the method for testing of high power digital transmitting-receiving subassembly noise coefficient provided by the invention；
Fig. 3 is the schematic of the power output of the second base band echo data and original analog echo-signal acquisition in Fig. 2
Flow chart.
Embodiment
As shown in figure 1, the test system of high power digital transmitting-receiving subassembly noise coefficient provided by the invention, including it is tested big
Power numeral transmitting-receiving subassembly, the signal output for being used to export analog echo signal being connected with tested high power digital transmitting-receiving subassembly
Device and the break-make optical fiber test equipment for controlling analog echo signal, signal output apparatus connect with optical fiber test equipment
Connect；
Optical fiber test equipment, do not received under analog echo signal state for receiving tested high power digital transmitting-receiving subassembly,
First base band echo data of output, determine that tested being averaged for high power digital transmitting-receiving subassembly is made an uproar according to the first base band echo data
Acoustical power；
Reception is stated tested high power digital transmitting-receiving subassembly and received under analog echo signal state, the second base band echo of output
Data, determine the power output of signal output apparatus and the signal power of the second base band echo data, according to power output and
Signal power determines signal gain, and determines the three dB bandwidth of base band echo data；
Optical fiber test equipment, it is additionally operable to determine the noise system of tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Number；
Wherein：PNoiseThe average noise work(under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is that tested high power digital is received and dispatched
Component receives the three dB bandwidth under analog echo signal state.
The present invention uses above technical scheme, and the technique effect reached is：Connect by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, it is determined that the average noise work(of tested high power digital transmitting-receiving subassembly
Rate, do not receive the second base band echo data under analog echo signal state by tested high power digital transmitting-receiving subassembly, it is determined that
Signal gain and three dB bandwidth, in conjunction with noise coefficient formula, it can effectively calculate tested high power digital transmitting-receiving subassembly
Noise coefficient.The systems and methods, by signal source and optical fiber test equipment, solves current high power digital transmitting-receiving subassembly
Matched using high power attenuator, the problem of causing noise coefficient index not measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicality.
As a kind of embodiment, signal output apparatus includes the big work(being connected with tested high power digital transmitting-receiving subassembly
Rate attenuator and the signal source being connected with high power attenuator and optical fiber test equipment；
Signal source, for the analog echo signal of generation to be exported to high power attenuator；
High power attenuator, sent for decaying to analog echo signal, and by the analog echo signal after decay
To tested high power digital transmitting-receiving subassembly.
As a kind of embodiment, system also includes and signal source, tested high power digital transmitting-receiving subassembly and optical fiber
The frequency synthesizer of test equipment connection；
Frequency synthesizer, during for providing coherent reference clock for signal source, providing sampled reference for optical fiber test equipment
Clock, for tested high power digital transmitting-receiving subassembly provide local oscillation signal.
As a kind of embodiment, system also includes being connected with signal source, optical fiber test equipment and frequency synthesizer
Router；
Router, for forwarding optical fiber test equipment to send the control instruction to frequency synthesizer and signal source.
Further, the signal input part of the signal output part of signal source and high power attenuator connects, high-power decay
The signal output part of device is connected with the signal input part of tested high power digital transmitting-receiving subassembly, and the local oscillation signal of frequency synthesizer is defeated
Go out end to be connected with the local oscillation signal input of tested high power digital transmitting-receiving subassembly, the coherent reference clock output of frequency synthesizer
End is connected with the coherent reference clock input of signal source, and sampled reference output terminal of clock and the test optical fiber of frequency synthesizer are set
Standby sampled reference input end of clock connection, the control command output end of optical fiber test equipment and tested high power digital transmitting-receiving group
The control command input connection of part；The echo data output end of tested high power digital transmitting-receiving subassembly is returned with optical fiber test equipment
Ripple data input pin connects, signal source, frequency synthesizer, the network port network-side with router respectively of optical fiber test equipment
Mouth is bi-directionally connected.
As shown in Fig. 2 present invention also offers a kind of method of testing of high power digital transmitting-receiving subassembly noise coefficient, including
Following steps：
Step S10：Obtain tested high power digital transmitting-receiving subassembly and do not receive first exported under analog echo signal state
Base band echo data, the average noise power of tested high power digital transmitting-receiving subassembly is determined according to the first base band echo data；
Step S20：Obtain tested high power digital transmitting-receiving subassembly and receive the second base exported under analog echo signal state
Band echo data, and the power output of original analog echo-signal, according to the second base band echo data, determine base band number of echoes
According to signal power and 3dB broadbands；
And the signal gain of base band echo data is determined according to power output and signal power；
Step S30：According to noise coefficient formula, it is determined that the noise coefficient of tested high power digital transmitting-receiving subassembly.
Invention uses above technical scheme, and the technique effect reached is：Received by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state, it is determined that the average noise work(of tested high power digital transmitting-receiving subassembly
Rate, do not receive the second base band echo data under analog echo signal state by tested high power digital transmitting-receiving subassembly, it is determined that
Signal gain and three dB bandwidth, in conjunction with noise coefficient formula, it can effectively calculate tested high power digital transmitting-receiving subassembly
Noise coefficient.The systems and methods, by signal source and optical fiber test equipment, solves current high power digital transmitting-receiving subassembly
Matched using high power attenuator, the problem of causing noise coefficient index not measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicality.
As shown in figure 3, obtaining tested high power digital transmitting-receiving subassembly receives second exported under analog echo signal state
Base band echo data, and the power output of original analog echo-signal, specifically include following steps：
Step S21：Generate analog echo signal；
Step S22：Analog echo signal is decayed, and the analog echo signal after decay is sent to tested big work(
Rate digital transmitting and receiving component；
Step S23：Receive the second base band echo data that tested high power digital transmitting-receiving subassembly is sent；
Step S24：Obtain the power output of analog echo signal.
As a kind of embodiment, noise coefficient formula is：
Wherein：PNoiseThe average noise work(under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
Embodiment is as follows：
First, electric in test device, each composition is partially in normal operating conditions.Optical fiber test equipment passes through router
Local oscillation signal needed for the tested high power digital transmitting-receiving subassembly output of network port control frequency synthesizer output；
Then, the output signal in the network port control signal source that optical fiber test equipment passes through router is off shape
State, optical fiber test equipment by control command sending port to tested high power digital transmitting-receiving subassembly send control command, make by
Survey high power digital transmitting-receiving subassembly and be in receiving state signal, optical fiber test equipment is received simultaneously by its echo data receiving port
The base band echo data of the tested high power digital transmitting-receiving subassembly passback of storage, calculates the average noise power no less than 2048 points
PNoise；
Optical fiber test equipment sends control command by control command sending port to tested high power digital transmitting-receiving subassembly,
Tested high power digital transmitting-receiving subassembly is set to be in receiving state signal, optical fiber test equipment is controlled by the network port of router
The output signal of signal source is in closure state and control signal source power output Po, and optical fiber test equipment passes through its echo data
Receiving port receives and stores the base band echo data of tested high power digital transmitting-receiving subassembly passback, calculates no less than 2048 points
Signal power Ps, merges the delta attenuation values A of high power attenuator, and then obtains gain G ain=Ps/Po+A；
Optical fiber test equipment sends control command by control command sending port to tested high power digital transmitting-receiving subassembly,
Tested high power digital transmitting-receiving subassembly is set to be in receiving state signal, optical fiber test equipment is controlled by the network port of router
The output signal of signal source carries out frequency sweep, and optical fiber test equipment is received by its echo data receiving port and stores tested big work(
The base band echo data of rate digital transmitting and receiving component passback, is calculated three dB bandwidth Bandwidth.
Finally, noise coefficient is calculated using following formula,
Wherein：PNoiseThe average noise work(under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
It can be that professional and technical personnel in the field realize or used that above-mentioned embodiment, which is intended to illustrate the present invention, to above-mentioned
Embodiment is modified and will be apparent for those skilled in the art, therefore the present invention includes but is not limited to
Above-mentioned embodiment, it is any to meet the claims or specification description, meet with principles disclosed herein and novelty,
The method of inventive features, technique, product, each fall within protection scope of the present invention.
Claims (7)
1. a kind of test system of high power digital transmitting-receiving subassembly noise coefficient, including tested high power digital transmitting-receiving subassembly, its
It is characterised by, in addition to the signal for being used to export analog echo signal being connected with the tested high power digital transmitting-receiving subassembly is defeated
Go out device and the break-make optical fiber test equipment for controlling the analog echo signal, the signal output apparatus with it is described
Optical fiber test equipment connects；
The optical fiber test equipment, the analog echo signal is not received for receiving the tested high power digital transmitting-receiving subassembly
Under state, the first base band echo data of output, the tested high power digital is determined according to the first base band echo data
The average noise power of transmitting-receiving subassembly；
State tested high power digital transmitting-receiving subassembly described in reception to receive under the analog echo signal state, the second base band of output
Echo data, determine the power output of the signal output apparatus and the signal power of the second base band echo data, root
Signal gain is determined according to the power output and the signal power, and determines the three dB bandwidth of the base band echo data；
The optical fiber test equipment, it is additionally operable to determine making an uproar for the tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Sonic system number；
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Wherein：PNoiseThe average noise power under analog echo signal state, k are not received for tested high power digital transmitting-receiving subassembly
=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is tested high power digital transmitting-receiving subassembly
Receive the three dB bandwidth under analog echo signal state.
2. the test system of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 1, it is characterised in that the letter
Number output device includes the high power attenuator being connected with the tested high power digital transmitting-receiving subassembly and high-power declined with described
Subtract the signal source of device and optical fiber test equipment connection；
The signal source, for the analog echo signal of generation to be exported to the high power attenuator；
The high power attenuator, for decaying to the analog echo signal, and by the analog echo signal after decay
Send to the tested high power digital transmitting-receiving subassembly.
3. the test system of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 2, it is characterised in that the system
System also includes the frequency being connected with the signal source, the tested high power digital transmitting-receiving subassembly and the optical fiber test equipment
Synthesizer；
The frequency synthesizer, for providing coherent reference clock for the signal source, providing and adopt for the optical fiber test equipment
Sample reference clock, for the tested high power digital transmitting-receiving subassembly provide local oscillation signal.
4. the test system of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 3, it is characterised in that the system
System also includes the router being connected with the signal source, the optical fiber test equipment and the frequency synthesizer；
The router, for forwarding the optical fiber test equipment to send the control to the frequency synthesizer and the signal source
Instruction.
5. a kind of method of testing of high power digital transmitting-receiving subassembly noise coefficient, it is characterised in that comprise the following steps：
Step S10：Obtain tested high power digital transmitting-receiving subassembly and do not receive the first base band exported under analog echo signal state
Echo data, the average noise work(of the tested high power digital transmitting-receiving subassembly is determined according to the first base band echo data
Rate；
Step S20：Obtain tested high power digital transmitting-receiving subassembly and receive the second base band time exported under analog echo signal state
Wave number evidence, and the power output of original analog echo-signal, according to the second base band echo data, determine that the base band is returned
The signal power of wave number evidence and 3dB broadbands；
And the signal gain of the base band echo data is determined according to the power output and the signal power；
Step S30：According to noise coefficient formula, the noise coefficient of the tested high power digital transmitting-receiving subassembly is determined.
6. the method for testing of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 5, it is characterised in that described to obtain
Tested high power digital transmitting-receiving subassembly is taken to receive the second base band echo data exported under analog echo signal state, and it is original
The power output of analog echo signal, specifically includes following steps：
Step S21：Generate analog echo signal；
Step S22：The analog echo signal is decayed, and the analog echo signal after decay is sent to described tested
High power digital transmitting-receiving subassembly；
Step S23：Receive the second base band echo data that the tested high power digital transmitting-receiving subassembly is sent；
Step S24：Obtain the power output of the analog echo signal.
7. the method for testing of the high power digital transmitting-receiving subassembly noise coefficient as described in claim 5 or 6, it is characterised in that institute
Stating noise coefficient formula is：
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Wherein：PNoiseThe average noise power under analog echo signal state, k are not received for tested high power digital transmitting-receiving subassembly
=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal state
Under signal gain, Bandwidth is that tested high power digital transmitting-receiving subassembly receives 3dB bands under analog echo signal state
It is wide.
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| CN201710978786.8A CN107817479B (en) | 2017-10-19 | 2017-10-19 | A kind of test macro and method of high power digital transmitting-receiving subassembly noise coefficient |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805148A (en) * | 2021-08-18 | 2021-12-17 | 北京无线电测量研究所 | Multifunctional digital TR component optical fiber testing device, system and method |
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| CN107817479B (en) | 2019-08-30 |
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