CN106771668A - A kind of electromagnetic radiation parameter test system - Google Patents
A kind of electromagnetic radiation parameter test system Download PDFInfo
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- CN106771668A CN106771668A CN201710008190.5A CN201710008190A CN106771668A CN 106771668 A CN106771668 A CN 106771668A CN 201710008190 A CN201710008190 A CN 201710008190A CN 106771668 A CN106771668 A CN 106771668A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
Abstract
The invention discloses a kind of effective electromagnetic radiation parameter test system, it is made up of HF receiving subsystem, parameter testing subsystem, signal transacting and control subsystem and auxiliary subsystem.System is using the automatic test of liftable revolving-turret, programmable attenuator and microwave switch realization and to monitoring and the storage automatically of various data；Multiple TCH test channels are provided using power divider structure, real-time testing and monitoring can be carried out to many radiation parameters；Flimsy testing element is laid special stress on protecting using limiter, it is ensured that the trouble free service of system.Using Seismic Detector pulse power, the electric field waveform of broadband time-domain pulse can be easily obtained；The measurement of pulse signals envelope is realized using irrelevant envelope detected technology, test system structure is simplified.Monitoring and storage, main control computer and integrated data the poster processing soft platform can realize seamless link to various dynamic datas automatically in real time.For the test of the electromagnetic radiation of complex electromagnetic environment provides a kind of strong means.
Description
Technical field
The invention belongs to microwave technology, field of electromagnetic compatibility, and in particular to a kind of electromagnetic radiation parameter test system
Background technology
Application of the electromagnetic compatibility technology in the research of industry, science and medical science (IMS) is increasingly extensive, and application field constantly expands
Greatly.Particularly in the case of with continuous wave, the high-power, microwave source that works long hours, now spatial microwave leakage rediation
Detrimental effects will be produced to control circuit.It is that space radiation is damaged to circuit element according to Related literature analysis hole coupling
Main path, therefore it is to ensure electronic product and communication system that electromagnetic radiation can also cause severe jamming to communication system in addition
Effectively work, it is necessary to test spacing electromagnetic radiation interference.
Spacing electromagnetic radiation disturbed test is mainly with standard-antenna method, field intensity meter (current probe) method etc., its Plays
Antenna method is mainly used in the test of device external electromagnetic radiation field, to determine its influence to external environment condition；Current many electricity
Magnetic radiation test system is tested mainly for specific forms of radiation and a small amount of parameter, lack a kind of many forms of radiation and
The test system of multi-parameter.
The content of the invention
The invention aims to solve the test limitation of many forms of radiation and multi-parameter, and propose a kind of effective electricity
Magnetic radiation parameter test system.The purpose of the present invention is to be achieved through the following technical solutions：
, by HF receiving subsystem A, parameter testing subsystem B, signal transacting are with control subsystem C and auxiliary body is constituted, its
Middle HF receiving subsystem A is made up of antenna, attenuator, microwave switch, power splitter, transmission line, limiter, wave detector, completes signal
Reception, transmission and corresponding processing function；Parameter testing subsystem B is made up of oscillograph and spectrum analyzer, completes signal
Time domain and frequency domain test；Signal transacting is with control subsystem C by optical transmitter and receiver, optical cable, industrial computer, interface board, display, manipulation
Switch, main control software composition, complete total system working status parameter be configured, show, real-time control and to external information exchange
Task；
The antenna of HF receiving subsystem A, including initial testing antenna, broadband signal test antenna and narrow band signal test days
Line.Initial testing antenna is used for preliminary wave mode, frequency band, the power parameter for judging measured signal.Broadband signal tests antenna and narrow
Band signal test antenna is used for accurate test；The antenna sets of HF receiving subsystem are located on a liftable turntable, to facilitate test
Alignment；The attenuator of HF receiving subsystem is programmable step attenuator, its size for acting as controlling measured signal, prevents from damaging surveying
Examination element and instrument；The microwave switch of HF receiving subsystem is grammed switch, and it act as selection test antenna.
The antenna of the HF receiving subsystem, including initial testing antenna, broadband signal test antenna and narrow band signal test
Antenna.Initial testing antenna is used to tentatively judge the parameters such as wave mode, frequency band, the power of measured signal.Broadband signal tests antenna
It is used for accurate test with narrow band signal test antenna.
The antenna sets of the HF receiving subsystem are located on a liftable turntable, to facilitate test to be aligned.
The attenuator of the HF receiving subsystem is programmable step attenuator, its size for acting as controlling measured signal, is prevented
Stop loss bad testing element and instrument.
The microwave switch of the HF receiving subsystem is grammed switch, and it act as selection test antenna.
The power splitter of the HF receiving subsystem is 3dB power splitters, and it act as increasing TCH test channel, to facilitate multi-parameter
Real-time testing.
The limiter of the HF receiving subsystem is a fixation limiter, and it act as protecting flimsy power detector.
Further, the power detector of the HF receiving subsystem is pulse peak power wave detector, for test pulse
Mean power and peak power.
Further, the parameter testing subsystem, including oscillograph and spectrum analyzer, complete the time domain and frequency of signal
Domain test, its parameter includes signal waveform, signal strength, signal frequency, repetition rate, pulse width, peak power and peak value
Power density and signal envelope.
Further, the electromagnetic radiation parameter test system is a full-automatic test system, and part to be measured can be carried out
Comprehensive parameters remote testing, and each test subsystems on test link can be surveyed on main control computer
Examination.Automatically monitoring and storage, main control computer and integrated data the poster processing soft platform can be realized real-time various dynamic datas
Seamless link.
Testing procedure：
1st, to reception system antenna and each tunnel coefficient in addition to wave detector are demarcated, and result is stored in into data
In file.
2nd, build each test subsystem and be placed on precalculated position.
3rd, each test equipment, control system start preheating.
4th, preset each testing equipment state parameter and fixed attenuator is placed in appropriate gear, adjustable attenuator and be placed in maximum
Gear.
5th, by preliminary examination antenna alignment measured signal the largest source direction, preliminary surveying is carried out to signal, during test, regulation is shown
The pad value of ripple device and spectrum analyzer setting and attenuator, is transferred to appropriate size, to facilitate test by measured result.Tentatively
Measure the parameters such as the frequency range and peak power of measured signal.
6th, attenuator is recovered into initial setting up.According to the result that previous step is measured, determine that frequency-division section test antenna juxtaposition is micro-
Ripple is switched on corresponding path, and beam angle measurement is carried out first.Then reception antenna position is adjusted with control system, by it
Alignment measured signal the largest source direction, measurement signal parameter, and measurement result is stored in storage device.Note during measurement
Whether observation test result is stablized, and in order to preferably eliminate interference, can surveying several groups of data certain interval of time more and be averaged.
7th, after measurement terminates, wave detector is calibrated according to the signal waveform for measuring be stored in result in data file and is protected
Deposit.
8th, control system calls dependence test result and calibration data file to calculate remaining parameter to be measured and provide corresponding
Figure, form and data file.Final testing result is stored in storage device.
The method of testing of radiation parameter
1) beam angle measurement
During measurement beam angle, by the tested equipment transmitting antenna of reception antenna alignment, in tested equipment radiation microwave signal
In the case of, by the transmitting antenna of the tested equipment of rotation, test system can obtain the radiant power of its different angle of radiation, and
The aerial radiation angle for combining tested equipment based on this draws out space radiation field distribution, so as to calculate beam angle.
2) pulse signal waveform, pulse width, repetition rate, peak power and peak power density measurement
Pulse signal waveform, i.e. voltage or power change with time rule.Measure change of the pulse signal power with the time
During law, reception system need to connect power detector.During measurement, by the tested equipment transmitting antenna of reception antenna alignment, tested
In the case of equipment radiation microwave signal, detecting circuit impulse waveform is measured by oscillograph, using the detection read on oscillograph
The amplitude V of signal, the microwave power P in reception antenna mouthful face is calculated according to formula (1)RChanged with time waveform, and Fu is to it
The change waveform of Antenna aperture power with frequency is tried to achieve in vertical leaf change.
PR=10(f(V)+ξ)/10 (1)
In formula, f (V) is the demarcation fitting function of wave detector；ξ is total transmission coefficient of antenna, attenuator and transmission line
(dB)。
Thus peak power and peak power density are calculated (peak power is divided by antenna effective cross-section).Pulse width and weight
Complex frequency can directly be measured by impulse waveform.
During measurement pulse voltage waveform, remove wave detector, its measuring method is similar to above method.
3) pulse field strength measurement
Electromagnetic pulse radiating field measuring system is as shown in Figure 5.
Measuring principle
Have various according to bibliography Electromagnetic pulse radiating field measuring method, herein using one of which：
It is assumed that the plane electromagnetic wave for inciding reception antenna mouthful face is eiT (), reception antenna output voltage receptance function is ui
T (), then have：
Wherein, h (t) is the impulse response of reception antenna.Formula (1) makees Fourier transform：
ui(ω)=H (ω) ei(ω) (2)
Antenna transmission coefficient H (ω) can be obtained by antenna factor T (ω).It is defined as electric-field intensity on Antenna aperture with
The ratio between output voltage, it changes with wave frequency, i.e.,：
Through-beam Series (2) are visible, T (ω) and H (ω) just reciprocal relations each other.
Consider that antenna is connected to the situation of output cable and attenuator, now oscillograph is output as：
u0(ω)=S21(ω)S0(ω)ui(ω) (4)
Wherein S21(ω)、S0(ω) is respectively the transmission coefficient of cable and attenuator, because attenuator can generally accomplish 0-
Constant decay in 18GHz broadbands, it can be considered that：
S0(ω)=S0e-jφ (5)
Obtained according to formula (2~5)：
ei(ω)=T (ω) u0(ω)/S21(ω)S0e-jφ (6)
Make inverse transformation and rebuild electric field waveform ei(t)：
ei(ω) inverts to convert and obtains ei(t).Now, u0(ω) is the Fourier transform of receiving voltage signal, Ke Yitong
Cross the sampled data of digital oscilloscope and carry out discrete fast Fourier transform (DFFT) and obtain, S21(ω) can be by vector network
Analyzer is demarcated, and antenna factor T (ω) is given or experimental calibration by producer.
4) pulse signal envelope measurement
The method of current pulse signals envelope measurement has various, including leading edge detection, sampling bridge circuit method, monostable multi resonant
Method, integration and the method for average, template signal matching detection method, correlation detection, signal integration method, synchronization detection method, but after all
It is two kinds, i.e. relevant way and irrelevant mode.
This test a kind of incoherent envelope detection method, the UWB high-frequency signals that the method directly receives antenna
Regular signal needed for becoming rear portion Base-Band Processing, and without considering the modulation system of received signal, in other words correlation
It is moved to the baseband portion for the treatment of relatively convenient.Multipath effect can be make use of as RAKE is received simultaneously, by adjusting wave detector
Charge and discharge electric constant make wave detector detect be the whole train of pulse comprising multipath signal envelope, so that enter discharge and recharge
The energy in loop increases, equal to by the energy accumulation of multiple signals improving sensitivity.Its system architecture diagram is as shown in Figure 6.
Its course of work is：The high-frequency pulse signal that antenna gets off is sent to waveshape detector after attenuator and is wrapped
Network detection, low frequency signal is converted into by high-frequency signal, will UWB signal carry information extracted from high-frequency signal, etc.
In by signal pulse stretcher, now the width of geophone output signal can be adjusted by the charging and discharging circuit of wave detector rear class.It
By low-frequency amplifier, low-frequency amplifier function in this is not only amplification to produced low frequency signal afterwards, also using putting
Big device frequency response in itself filters the high-frequency signal of some feedings to constitute low pass filter.After amplifying by low frequency
Signal is re-fed into highly sensitive comparator, and comparator plays a part of wiping out background noise herein, while having amplify signal
Function.Last comparator output is sent to monostable trigger, to produce the standard digital of pulsewidth required for rear class baseband processing portion
Signal.
5) ultra-broadband signal spectrum measurement
During measurement ultra-broadband signal frequency, the frequency of ultra-broadband signal can not be usually measured due to bandwidth limitation spectrum analyzer
Band.The time domain waveform of signal can be now obtained by time domain measurement, time domain waveform is transformed to by frequency-domain waveform by Fourier transform,
The bandwidth of ultra-broadband signal can be obtained by analysis.
6) separation and test of ultra-wideband impulse signal and narrow-band ping
There are intersection, the situation for overlapping in time domain, measurement measures the only of each pulse signal using correlation detection technology
Vertical wave shape, so as to measure the parameter of each pulse signal respectively.
6-1) ultra-wideband impulse signal and narrow-band ping sample signal are obtained
Extracting the sample signal of ultra-wideband pulse and narrow-band ping is, respectively to ultra wide band and narrow-band ping list
Solely measurement, discharges time domain intersection, the eclipse effect of signal.
6-2) correlation detection technology principle and separation is tested
The coherent detection of signal is that the sample signal of signal of interest is made into auto-correlation or cross-correlation with pending signal,
This 2 groups of correlation functions of signal being obtained, when there is signal interested in pending signal, correlation will be had in correlation function
The appearance at peak, by detecting that relevant peaks are capable of achieving the detection to signal of interest.Coherent detection is a kind of inspection of time-domain information
Survey method.Correlation analysis mainly are carried out to signal and noise, there are different statistical properties using signal and noise, passed through
Auto-correlation and computing cross-correlation, reach suppression noise, the purpose of detection signal.Assuming that n1(t) and n2T () is a pair of sample of signal,
2 groups of signal cross-correlation functions are defined as：
WhenWhen, claim n1(t) and n2T () is uncorrelated, at this moment n1(t) and n2T () is statistically independent mutually.If
τ=τ0When,Take maximum, then it represents that the 2 signal time differences were τ0When, degree of correlation highest, waveform similarity degree is maximum.
Separate ultra wide band and narrow band signal, the signal for making r (t) be received for reception system, s1T () believes for ultra-wideband pulse
Number, s2T () is narrow-band ping, there is noise n (t) in system.Reception system receives the ultra-short pulse in checkout area simultaneously
Signal and narrow-band ping are rushed, model is as shown in Figure 7.
The signal expression that receiver is received, it is as follows：
R (t)=s1(t-τ1)+s2(t-τ2)+n(t)
Wherein, τ1、τ2To be respectively ultra-wideband impulse signal s1(t) and narrow-band ping s2T () reaches reception system
Time delay.
Ultra-wideband impulse signal s1T () does cross-correlation function with signal r (t) is received, extract ultra-wideband impulse signal.s1
T () makees cross-correlation with r's (t), thenAs t=τ1When,Reach maximum.Judge the appearance of peak value, detection signal s1(t).By detecting peak value, it is possible to extract ultra wide band
Pulse signal s1(t).Similarly, s is made2The cross-correlation function of (t) and r (t), as t=τ2When,Reach maximum.Inspection
Survey peak value, it is possible to extract narrow-band ping s2(t)。
Reception system is demarcated
1) geophone calibration
When to system calibrating, wave detector is demarcated first, when demarcating notably:Microwave signal dutycycle is different
When, the efficiency of wave detector can be different.Equally, pulse width can also influence the amplitude of geophone output signal.Therefore, demarcate
When should try one's best make pulse width and repetition rate with it is actually used when situation it is consistent, certain microwave frequency should be with when using one
Cause.Caliberating device is as shown in Figure 8.
The microwave signal of microwave source output is decayed by variable attenuator, then is equally divided into two-way, a route through power splitter
School detector is treated, its rectified signal is observed with oscillograph；Another route reference power meter measurement.Calibration curve is drawn, together
When provide its square-law (or the linear detection being intended that) scope.
2) reception antenna is demarcated
The transmission coefficient of reception antenna is demarcated：If the field intensity of observation station is EinT (), then meet,
In formula：VrT () is the voltage on reception antenna feeder line, Z0It is free space wave impedance, h (t) is transmitted for reception antenna
The forms of time and space of coefficient, ZcIt is the impedance of feeder line.
While antenna receiving power Pr=AeffSin, wherein SinIt is receiving power density, AeffIt is the effective aperture face of antenna
Product (G is receiving antenna gain), then：
The frequency domain relational expression of observation station field intensity is：
The transmission coefficient of antenna is can be received from the equations above,
In formula, c is the light velocity, and f is frequency.
The gain of reception antenna can be drawn by comparative method for measuring, such that it is able to obtain transmission coefficient.
3) transmission cable, attenuator, power splitter, limiter and microwave switch are demarcated
Traditional method is that these elements are demarcated respective transmission coefficient with lattice gauge respectivelyHerein for time-consuming
With the influence of jointing, each path lattice gauge to actual test demarcates their transmission coefficient respectively
The beneficial effects of the invention are as follows using initial testing step, judging that ripple surveys wave mode, frequency band, power of signal etc.
Parameter, it is convenient to select appropriate test antenna, improve measuring accuracy.Using liftable revolving-turret, programmable attenuator and microwave
Switch realization is automatic to be tested and to monitoring and the storage automatically of various data.Multiple TCH test channels are provided using power divider structure, can
Real-time testing and monitoring are carried out to many radiation parameters.Flimsy testing element is laid special stress on protecting using limiter, it is ensured that
The trouble free service of system.Using Seismic Detector pulse power, the electric field waveform of broadband time-domain pulse can be easily obtained.Using
Irrelevant envelope detected technology realizes the measurement of pulse signals envelope, simplifies test system structure.Effectively solution of the invention
The test problem of many forms of radiation and the multi-parameter of having determined, for the test of the electromagnetic radiation of complex electromagnetic environment provides one kind effectively
Means.
Brief description of the drawings
Fig. 1 is electromagnetic radiation parameter test system composition frame chart；
Fig. 2 is reception system composition frame chart；
Fig. 3 is parameter testing subsystem composition frame chart；
Fig. 4 is signal transacting and control subsystem composition frame chart；
Fig. 5 Electromagnetic pulse radiating field measuring system figures；
Fig. 6 pulse signal envelope waveform measuring system block diagrams；
Fig. 7 reception system illustratons of model；
The caliberating device structure chart of Fig. 8 wave detectors.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Below in an example, the instrument of use, equipment, element title and brief performance parameter, detailed performance parameter
For：1 HF receiving subsystem hardware
Antenna
Ultra-wideband antenna：LB460, working band：0.4~6GHz；With interior typical standing wave：1~1.5；Typical gains：
10dB。
Initial testing antenna：LB8180, working band：0.8~16GHz；With interior typical standing wave：1~2.0；Typical gains：
12dB。
Narrow-band antenna group：LB-159-10, working band：4.90-7.05GHz；LB-112-10, working band：7.05-
10.0GHz；LB-75-10, working band：10.0-15.0GHz；LB-62-10, working band：12.4-18.0GHz.
Coaxial cable
Megaphase coaxial cables, model：CC141, frequency (GHz)：DC-26.5GHz, insertion loss：0.006-
0.286dB, standing-wave ratio：1.10:1, power capacity：490W(5GHz).
Attenuator
Coaxial fixed attentuator 1DTS150G (F) DC-18GHz 150Watts
8495K programmable step attenuators
Key property and technical indicator
Frequency range：Direct current is to 26.5GHz
Attenuation range：0 to 70dB, with 10dB steppings
Maximum radio frequency input power：1W (average value), 100W (peak value)
Wave detector
Narda wave detector 4303A-03 models：4303A-03
Frequency range：0.01-18GHz
Flatness：±0.6dB
Sensitivity (mV/ μ W)：0.5
Standing-wave ratio (Max)：＜ 1.6
Input power (Max)：100mW
Power divider
SHX-GF2-2-18
Frequency range：0.01-18GHz
Maximum radio frequency input power：1W (average value), 100W (peak value)
Microwave switch
Dow-Key SP6T and SPDT microwave switches, power 50W, frequency DC~18GHz.
Load limiter
0.01~26.5GHZ of Agilent N9355C
Key property and technical indicator
Frequency range is from 0.01 to 26.5GHz
Low insertion loss<2dB
Fast on-times<100ps
Threshold limit 10dBm, representative value
Directional coupler coupler
OH-T-5200-20
Frequency：0.5-20.0GHz
The degree of coupling：20dB
2 signal transacting subsystem hardware
Agilent oscillograph
DSO90804A Infiniium high-performance oscillographs：
Bandwidth：8GHz
Passage：4
Sample rate：40Gsa/s
Maximum storage depth：1Gpts
3 demarcate subsystem hardware
M8190A 12GSa/s AWGs, bandwidth：DC—5GHz
4 master control subsystems
Optical transmitter and receiver
Brand：SNIP protects lightning protection 4V/4 roads video optical multiplexer/a pair of single mode 20KM
Transmission way：4
Transmission range：Single mode light transmits 20KM
Industrial computer：
Model：Grind magnificent IPC-7120
CPU：E5300
Internal memory：1GB
Hard-disk capacity：160GB
Other：DVD imprintings, there is standard serial paralled interface, special purpose interface, network interface
Display：DELL U2412M
Parameters of display：
Size:24 inches
Resolution ratio:1920×1200
Screen proportion:16:10
As shown in figure 1, electromagnetic radiation parameter test system, including HF receiving subsystem, parameter testing subsystem, signal transacting
With control subsystem and auxiliary subsystem.The signal that wherein HF receiving subsystem is received sends parameter testing subsystem to and completes letter
Number time domain and frequency domain test, test result be then sent through control subsystem be analyzed treatment, finally control subsystem according to divide
The control of analysis result, regulation HF receiving subsystem and parameter testing subsystem, it is ensured that obtain satisfied result.Auxiliary subsystem rises
Record real-time measuring data and working state of system parameter, demarcate receiving channel and respectively constitute partial parameters, suppression electromagnetic interference
Effect.HF receiving subsystem is as shown in Fig. 2 including antenna, attenuator, microwave switch, power splitter, transmission line, limiter, detection
Device.Antenna includes an initial testing antenna, a broadband signal test antenna and four narrow band signal test antennas, initial to survey
Examination antenna is used to tentatively judge the parameters such as wave mode, frequency band, the power of measured signal.Broadband signal tests antenna and narrow band signal is surveyed
Examination antenna is used for accurate test.The antenna sets are located on a liftable turntable, to facilitate test to be aligned.After each antenna
A programmable step attenuator is connect, its size for acting as controlling measured signal prevents from damaging testing element and instrument.The decay
Device meets people one six and enters a program control microwave switch for outing, and it act as selection test antenna.The program control microwave switch output end
Two power splitters are connect, it is 3 passages that TCH test channel number is increased.A wherein passage send spectrum analyzer measurement frequency, frequency spectrum, another
Passage send oscilloscope measurement pulse voltage waveform, pulsewidth, repetition rate, and last passage is sent by limiter, power detector
Oscilloscope measurement average pulse power, peak power, field intensity.Parameter testing subsystem is as shown in figure 3, including oscillograph and frequency spectrum
Analyzer, completes the time domain and frequency domain test of signal, and its parameter includes signal waveform, signal strength, signal frequency, repetition frequency
Rate, pulse width, peak power and peak power density and signal envelope.Signal transacting with control subsystem as shown in figure 4,
Constituted including optical transmitter and receiver, optical cable, industrial computer, interface board, display, manipulation of switches, main control software etc., complete total system work shape
State parameter is configured, shows, real-time control and to external information exchange etc. task.The instrument of use, equipment, element title and letter
Performance parameter is wanted, detailed performance parameter is referring to annex 1.
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (3)
1. a kind of electromagnetic radiation parameter test system, is divided by HF receiving subsystem A, parameter testing subsystem B, signal transacting and control
System C and auxiliary body are constituted, and wherein HF receiving subsystem A is by antenna, attenuator, microwave switch, power splitter, transmission line, amplitude limit
Device, wave detector are constituted, and complete reception, transmission and the corresponding processing function of signal；Parameter testing subsystem B is by oscillograph and frequency
Spectrometer is constituted, and completes the time domain and frequency domain test of signal；Signal transacting is with control subsystem C by optical transmitter and receiver, optical cable, industry control
Machine, interface board, display, manipulation of switches, main control software composition, completion total system working status parameter is configured, shows, reality
When control and to external information switching task；
The antenna of HF receiving subsystem A, including initial testing antenna, broadband signal test antenna and narrow band signal test antenna；Just
Test antenna begin for preliminary wave mode, frequency band, the power parameter for judging measured signal；Broadband signal tests antenna and narrow band signal
Test antenna is used for accurate test；The antenna sets of HF receiving subsystem are located on a liftable turntable, to facilitate test to be aligned；Connect
The attenuator of contracture system is programmable step attenuator, its size for acting as controlling measured signal, prevents from damaging testing element
And instrument；The microwave switch of HF receiving subsystem is grammed switch, and it act as selection test antenna.
2., according to claim 1, the power splitter of the HF receiving subsystem A is 3dB power splitters, and it act as increasing TCH test channel,
To facilitate the real-time testing of multi-parameter；The limiter of the HF receiving subsystem A is a fixation limiter, and it act as protecting rapid wear
Bad power detector；The power detector of the HF receiving subsystem A is pulse peak power wave detector, flat for test pulse
Equal power and peak power.
3. according to claim 1, the parameter testing subsystem B, including oscillograph and spectrum analyzer, complete the time domain of signal
And frequency domain test, its parameter include signal waveform, signal strength, signal frequency, repetition rate, pulse width, peak power and
Peak power density and signal envelope.
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