CN205681428U - A kind of test device of ICS wireless discharging-directly station receive-transmit isolation - Google Patents
A kind of test device of ICS wireless discharging-directly station receive-transmit isolation Download PDFInfo
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- CN205681428U CN205681428U CN201620564562.3U CN201620564562U CN205681428U CN 205681428 U CN205681428 U CN 205681428U CN 201620564562 U CN201620564562 U CN 201620564562U CN 205681428 U CN205681428 U CN 205681428U
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- attenuator
- wireless discharging
- directly station
- ics
- combiner
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Abstract
The utility model discloses the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation, including controller, signal generator, isolator, combiner, ICS wireless discharging-directly station, power splitter, the first fixed attenuator, the second fixed attenuator, stepping radio frequency attenuator and analyser；Signal generator is connected with the first input end of combiner by isolator；The outfan of combiner is connected with the input of power splitter by ICS wireless discharging-directly station；First outfan of power splitter is connected with analyser by the first fixed attenuator；Second outfan of power splitter is connected with the second input of combiner by the second fixed attenuator, stepping radio frequency attenuator；Controller is connected with stepping radio frequency attenuator, ICS wireless discharging-directly station and analyser respectively.The test device of the ICS wireless discharging-directly station receive-transmit isolation of this utility model embodiment, it is possible to increase testing efficiency.
Description
Technical field
This utility model relates to field tests, particularly relates to the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation.
Background technology
Along with the fast development of ground digital television broadcast industry, the user of DTV sharply increases, and improves numeral electricity
Just seem imperative depending on the coverage of radio network.Wireless intra-frequency repeater is as the relay amplifier of signal, Ke Yiti
The coverage of high signal and minimizing blind area, but between its dual-mode antenna, there is coupling, produced coupling echo limits directly
Put the work efficiency at station, because echo-signal can be amplified by repeater again, form positive feedback and produce vibration, cause system unstable
Even self-excitation.In order to solve this problem, need high performance ECT echo cancellation technique, thus create ICS wireless digital repeater station.
ICS (Interference Cancellation System) repeater uses digital processing technology, automatically detects
The transmission characteristic of leakage channel loop, goes out the mirror image letter as the interference inputted by leakage channel in repeater internal structure
Number, deduct image signal in input signal, just reach to disturb the purpose of signal cancellation, simultaneously when improving system gain, fall
The low equipment requirement to isolation, its performance and function meet the standard of conventional wireless discharging-directly station.Additionally, due to have employed
ICS technology, equipment will no longer be limited by the requirement of isolation between antennas when installing, and dual-mode antenna can use same pole, sky
Feedback is installed simple, takes up an area little, and property is coordinated convenient.
Degree of being generally insulated is defined as the repeater input port signal dough softening to output port signal, is power ratio,
Unit Db.Fig. 1 is the test device of existing a kind of ICS wireless IC S wireless discharging-directly station receive-transmit isolation, and ICS to be tested is wireless
Repeater is placed in shielded box, and PC connects ICS wireless discharging-directly station to be measured by data wire, and signal generator passes through radio-frequency cable
Connecting isolator, isolator connects power splitter 1 by radio-frequency cable, and power splitter 1 connects by radio-frequency cable that ICS is wireless directly to be put
Standing, ICS wireless discharging-directly station connects power splitter 2 by radio-frequency cable, and power splitter 2 connects attenuator, attenuator by radio-frequency cable
Connecting audiofrequency spectrometer by radio-frequency cable, fixed attenuator connects power splitter 1 and power splitter 2 by radio-frequency cable.
Tester is by changing the isolation of the fixed attenuator analog IC S wireless discharging-directly station of differential declines value, when solid
The pad value determining attenuator meets equipment index requirement, and ICS wireless discharging-directly station does not produce self-excitation phenomena, at this moment the most permissible
Judge that the receive-transmit isolation of ICS wireless discharging-directly station meets equipment index requirement.Specifically such as Fig. 1, when the gain of repeater is 90dB
Time, when the signal fixed attenuator of repeater output port enters the input port of repeater, when the value of fixed attenuator makes
The EVM value of repeater reaches 6% critical point or self-excitation critical point occurs, and at this moment the attenuator of fixed attenuator is exactly that ICS is directly put
The isolation stood.
Above-mentioned test device all has following defects that tester must be by ceaselessly changing the fixing of differential declines value
Attenuator, changes fixed attenuator simultaneously each time, is required for observing on audiofrequency spectrometer and modulates accuracy value i.e. EVM index.At equipment
Volume production test process needs carry out substantial amounts of repetitive operation, cause testing efficiency low.
Utility model content
The purpose of this utility model embodiment is to provide the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation, energy
Enough improve testing efficiency.
This utility model embodiment provides the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation, including controlling
Device, signal generator, isolator, combiner, ICS wireless discharging-directly station, power splitter, the first fixed attenuator, the second fixed attenuation
Device, stepping radio frequency attenuator and analyser；
Described signal generator is connected with the first input end of described combiner by described isolator；
The outfan of described combiner is connected with the input of described power splitter by described ICS wireless discharging-directly station；
First outfan of described power splitter is connected with described analyser by described first fixed attenuator；
Second outfan of described power splitter pass sequentially through described second fixed attenuator, described stepping radio frequency attenuator with
Second input of described combiner connects；
Described controller is respectively with described stepping radio frequency attenuator, described ICS wireless discharging-directly station and described analyser even
Connect.
As further improvement of these options, described controller is wireless directly with described ICS by RS232 serial ports respectively
Put station, described stepping radio frequency attenuator and described analyser to connect.
As further improvement of these options, described signal generator connects described isolator by radio-frequency cable；
Described isolator connects the first input end of described combiner by radio-frequency cable；The outfan of described combiner passes through radio frequency electrical
Cable connects described ICS wireless discharging-directly station；Described ICS wireless discharging-directly station connects the input of described power splitter by radio-frequency cable；
First outfan of described power splitter connects described first fixed attenuator by radio-frequency cable；Described first fixed attenuator leads to
Cross radio-frequency cable and connect described analyser.
As further improvement of these options, the second outfan of described power splitter is defeated with the second of described combiner
Enter and be sequentially connected with described second fixed attenuator and described stepping radio frequency attenuator by radio-frequency cable between end.
As further improvement of these options, described analyser be spectrum analyzer, transmitter measuring and analysing meter or
Signal analyzer.
As further improvement of these options, the test device of described ICS wireless discharging-directly station receive-transmit isolation also wraps
Including electromagnetic shielding chamber, described controller, described signal generator, described isolator, described combiner, described ICS is wireless directly puts
Stand, described power splitter, described first fixed attenuator, described second fixed attenuator, described stepping radio frequency attenuator and described
Analyser is placed in described electromagnetic shielding chamber interior.
As further improvement of these options, described stepping radio frequency attenuator is 0.5dB radio frequency attenuator.
The test device of the ICS wireless discharging-directly station receive-transmit isolation of the present embodiment, compared with prior art, has and has as follows
Benefit effect: this utility model introduces stepping radio frequency attenuator, can change its attenuation by controller, simultaneously by analyzing
Instrument can observe directly test result, it is not necessary to tester repeats to change the fixed attenuator of differential declines amount, reduces survey
The working strength of examination personnel, shortens the testing time, improves testing efficiency.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation in prior art.
Fig. 2 is the structural frames of the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation in this utility model embodiment
Figure.
Wherein: 11-controller, 12-signal generator, 13-isolator, 14-combiner, 15-ICS wireless discharging-directly station, 16-
Power splitter, 17-the first fixed attenuator, 18-analyser, 19-stepping radio frequency attenuator, 20-the second fixed attenuator, 21-electricity
Magnetic shield room.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
See Fig. 2, be the test device of a kind of ICS wireless discharging-directly station receive-transmit isolation that this utility model embodiment provides
Structural representation.The test device of this ICS wireless discharging-directly station receive-transmit isolation includes controller 11, signal generator 12, list
To device 13, combiner 14, ICS wireless discharging-directly station 15, power splitter the 16, first fixed attenuator the 17, second fixed attenuator 20, step
Enter radio frequency attenuator 19 and analyser 18；
Described signal generator 12 is connected with the first input end of described combiner 14 by described isolator 13；
The outfan of described combiner 14 is connected by the input of described ICS wireless discharging-directly station 15 with described power splitter 16
Connect；
First outfan of described power splitter 16 is connected with described analyser 18 by described first fixed attenuator 17；
Second outfan of described power splitter 16 passes sequentially through described second fixed attenuator 20, described stepping rf attenuation
Device 19 is connected with the second input of described combiner 14；
Described controller 11 respectively with described stepping radio frequency attenuator 19, described ICS wireless discharging-directly station 15 and described point
Analyzer 18 connects.
Wherein, described controller 11 is connected with described stepping radio frequency attenuator 19, in order to control described stepping rf attenuation
The attenuation of device 19.Described controller 11 is connected with described analyser 18, in order to control the parameter configuration of described analyser 18 also
Record test result.Wherein, the parameter of described analyser 18 can be test bandwidth, RBW, VBW etc..Described controller 11 and institute
State ICS wireless discharging-directly station 15 to be connected, in order to control each radio frequency parameter and the webmaster parameter etc. of described ICS wireless discharging-directly station 15.
Concrete, described controller 11 concretely personal computer (personal computer is called for short PC).Individual
Computer one word stems from first desktop PC model PC of IBM in 1981, has the individual of Apple II before this
Use computer.Can independent operating, complete the personal computer of specific function.Personal computer need not share other computers
The resources such as process, disk and printer can also work alone.From desktop computer (or claiming desk computer, desktop computer), notes
This computer broadly falls into the category of personal computer to net book and panel computer and super etc..
The present embodiment middle controller 11 is that PC, PC test soft equipped with stepping radio frequency attenuator control software, analyser automatically
Part and ICS wireless discharging-directly station control software.Wherein, stepping rf attenuation controls software and can control described stepping radio frequency attenuator
The attenuation of 19.The effect of analyser automatic testing software be automatically control described analyser 18 parameter configuration (test bandwidth,
RBW, VBW etc.) and record test result.ICS wireless discharging-directly station controls software can control each of described ICS wireless discharging-directly station 15
Individual parameter.
Concrete, it is that PC passes through the data wire data transfer mode control with serial ports or parallel port that radio frequency attenuator controls software
A software of radio frequency attenuator attenuation, can control the attenuation of radio frequency attenuator by this software.
Analyser automatic testing software is virtual instrument technique based on LabVIEW, and that audiofrequency spectrometer operation is carried out software is automatic
Control, build the spectrum analyzer Auto-Test System with frequency spectrum autorun.Use the global variable skill of LabVIEW
Art, it is achieved the real-time tracking controlling parameter shows；Use the data storage technology of LabVIEW, it is achieved test initial data text
File and the preservation of master control interface image file.
It is the control software that ICS wireless discharging-directly station producer writes according to the equipment of oneself that ICS wireless discharging-directly station controls software,
Each radio frequency parameter and the webmaster parameter etc. of ICS wireless discharging-directly station can be controlled by this software.Such as can control ICS wireless
The channel number opened of repeater, radio frequency link gain etc..
Wherein, described controller 11 is respectively by RS232 serial ports and described ICS wireless discharging-directly station 15, described stepping radio frequency
Attenuator 19 and described analyser 18 connect.
Described signal generator 12 connects described isolator 13 by radio-frequency cable；Described isolator 13 passes through radio-frequency cable
Connect the first input end of described combiner 14；It is wireless that the outfan of described combiner 14 connects described ICS by radio-frequency cable
Repeater 15；Described ICS wireless discharging-directly station 15 connects the input of described power splitter 16 by radio-frequency cable；Described power splitter 16
The first outfan connect described first fixed attenuator 17 by radio-frequency cable；Described first fixed attenuator 17 passes through radio frequency
Cable connects described analyser 18.
It is sequentially connected with described second fixed attenuator by radio-frequency cable between described power splitter 16 and described combiner 14
20 and described stepping radio frequency attenuator 19.
Described analyser 18 is spectrum analyzer, transmitter measuring and analysing meter or signal analyzer.
Further, the test device of described ICS wireless discharging-directly station receive-transmit isolation also includes electromagnetic shielding chamber 21, described
Controller 11, described signal generator 12, described isolator 13, described combiner 14, described ICS wireless discharging-directly station 15, described
Power splitter 16, described first fixed attenuator 17, described second fixed attenuator 20, described stepping radio frequency attenuator 19 and described
It is internal that analyser 18 is placed in described electromagnetic shielding chamber 21.It is dry that what described electromagnetic shielding chamber 21 was main acts on isolation external electromagnetic
Disturb, it is ensured that indoor electronic, electrical equipment normally work.Particularly in electronic component, the metering of electric equipment, test job,
Utilize electromagnetic shielding chamber (or darkroom) to simulate desired electrical magnetic environment, improve the accuracy of testing result.Screened room blocks indoor electric
Magnetic radiation outwardly spreads, and strong electromagnetic radiation source should give shielding isolation, prevents from disturbing other electronics, electrical equipment normal
Even infringement staff is healthy in work.This utility model introduces electromagnetic shielding chamber, shields and disturbs signal in the air, makes
Obtain test result more accurately, reliably.
Further, described stepping radio frequency attenuator 19 is 0.5dB radio frequency attenuator.Measuring accuracy is made to bring up to from 1dB
0.5dB。
Signal generator 12, also known as signal source (source or signal source) or agitator, is that one is provided that
Various frequencies, waveform and the equipment of the output level signal of telecommunication.Measuring various telecommunication systems or the amplitude response of telecommunication apparatus, frequently
When rate characteristic, transmission characteristic and other electrical quantity, and when measuring characteristic and the parameter of components and parts, be used as test signal source or
Driving source, has a wide range of applications in production practices and sciemtifec and technical sphere.
Isolator 13 is also known as directional filter, one-way isolator.It is from development in microwave device circulator principle
Come, design exclusively for radio communication transmitter, have and absorb the interference signal being entered transmitter from the external world by antenna-feedback system
Energy, and protected transmitter, reduce the functions such as fault rate.
Combiner 14 and power splitter 16 are a kind of a road input signal energy to be divided into two-way or multiple-channel output is equal or not
The device of equal energy, it is possible in turn multiple signals energy is synthesized a road output, now can be also referred to as combiner.
ICS wireless discharging-directly station 15 uses digital processing technology, automatically detects the transmission characteristic of leakage channel loop, is directly putting
Internal structure of standing goes out the image signal as the interference inputted by leakage channel, deducts image signal in input signal, just
Reach to disturb the purpose of signal cancellation, simultaneously when improving system gain, reduce the equipment requirement to isolation.
Analyser 18 can be spectrum analyzer, transmitter measuring and analysing meter or signal analyzer.In the present embodiment, preferably
For signal analyzer, have another name called spectrum analyzer, be called for short audiofrequency spectrometer.It is mainly used in the frequency-domain analysis of radio frequency and microwave signal, including
Measure the power of signal, frequency, distortion product etc..Radio frequency and microwave signal can also be demodulated analyzing by it.
Stepping radio frequency attenuator 19 is a kind of radio frequency energy loss RF Components, by controlling the control function of pin
The rf attenuation of 0.5dB-31.5dB can be realized.Minimal attenuation stepping current RF Components manufacturer provide for 0.5dB.
First fixed attenuator 17 and the second fixed attenuator 20 are the fixing attenuators that cannot change of pad value, and it declines
Depreciation typically has 5dB, 10dB, 105dB, 20dB, 30dB etc..
The test device of the ICS wireless discharging-directly station receive-transmit isolation of the present embodiment is by directly putting wireless with ICS for controller
Stand, analyser is connected with stepping radio frequency attenuator；The gain of ICS wireless discharging-directly station and declining of stepping radio frequency attenuator can be controlled
Decrement.In test process, the modulated signal that signal generator produces makes ICS wireless discharging-directly station reach peak power output, logical
Cross controller control stepping radio frequency attenuator to reduce with 0.5dB stepping, obtain EVM value by analyser test, sentence according to EVM value
Whether disconnected there is self-excitation critical point, finally gives the isolation of ICS repeater.
The test device of the ICS wireless discharging-directly station receive-transmit isolation of the present embodiment, compared with prior art, has and has as follows
Benefit effect:
The test device of the ICS wireless discharging-directly station receive-transmit isolation of the present embodiment, compared with prior art, has and has as follows
Benefit effect: this utility model introduces stepping radio frequency attenuator, can change its attenuation by controller, simultaneously by analyzing
Instrument can observe directly test result, it is not necessary to tester repeats to change the fixed attenuator of differential declines amount, reduces survey
The working strength of examination personnel, shortens the testing time, improves testing efficiency.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and profit
Decorations are also considered as protection domain of the present utility model.
Claims (7)
1. the test device of an ICS wireless discharging-directly station receive-transmit isolation, it is characterised in that include controller, signal generator,
Isolator, combiner, ICS wireless discharging-directly station, power splitter, the first fixed attenuator, the second fixed attenuator, stepping rf attenuation
Device and analyser；
Described signal generator is connected with the first input end of described combiner by described isolator；
The outfan of described combiner is connected with the input of described power splitter by described ICS wireless discharging-directly station；
First outfan of described power splitter is connected with described analyser by described first fixed attenuator；
Second outfan of described power splitter passes sequentially through described second fixed attenuator, described stepping radio frequency attenuator with described
Second input of combiner connects；
Described controller is connected with described stepping radio frequency attenuator, described ICS wireless discharging-directly station and described analyser respectively.
2. the test device of ICS wireless discharging-directly station receive-transmit isolation as claimed in claim 1, it is characterised in that described control
Device is connected with described ICS wireless discharging-directly station, described stepping radio frequency attenuator and described analyser by RS232 serial ports respectively.
3. the test device of ICS wireless discharging-directly station receive-transmit isolation as claimed in claim 1, it is characterised in that described signal
Generator connects described isolator by radio-frequency cable；Described isolator by radio-frequency cable connect described combiner first defeated
Enter end；The outfan of described combiner connects described ICS wireless discharging-directly station by radio-frequency cable；Described ICS wireless discharging-directly station leads to
Cross radio-frequency cable and connect the input of described power splitter；First outfan of described power splitter connects described by radio-frequency cable
One fixed attenuator；Described first fixed attenuator connects described analyser by radio-frequency cable.
4. the test device of ICS wireless discharging-directly station receive-transmit isolation as claimed in claim 1, it is characterised in that described merit is divided
It is sequentially connected with described second by radio-frequency cable between second outfan and second input of described combiner of device fixing to decline
Subtract device and described stepping radio frequency attenuator.
5. the test device of ICS wireless discharging-directly station receive-transmit isolation as claimed in claim 1, it is characterised in that described analysis
Instrument is spectrum analyzer, transmitter measuring and analysing meter or signal analyzer.
6. the test device of ICS wireless discharging-directly station receive-transmit isolation as claimed in claim 1, it is characterised in that described ICS without
The test device of line repeater receive-transmit isolation also includes electromagnetic shielding chamber, described controller, described signal generator, described list
To device, described combiner, described ICS wireless discharging-directly station, described power splitter, described first fixed attenuator, described second fix
Attenuator, described stepping radio frequency attenuator and described analyser are placed in described electromagnetic shielding chamber interior.
7. the test device of the ICS wireless discharging-directly station receive-transmit isolation as described in any one of claim 1～6, it is characterised in that
Described stepping radio frequency attenuator is 0.5dB radio frequency attenuator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620564562.3U CN205681428U (en) | 2016-06-12 | 2016-06-12 | A kind of test device of ICS wireless discharging-directly station receive-transmit isolation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620564562.3U CN205681428U (en) | 2016-06-12 | 2016-06-12 | A kind of test device of ICS wireless discharging-directly station receive-transmit isolation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370471A (en) * | 2017-06-29 | 2017-11-21 | 中国电子科技集团公司第四十研究所 | A kind of PXI bus programmables amplification/attenuation device and its calibration method |
-
2016
- 2016-06-12 CN CN201620564562.3U patent/CN205681428U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370471A (en) * | 2017-06-29 | 2017-11-21 | 中国电子科技集团公司第四十研究所 | A kind of PXI bus programmables amplification/attenuation device and its calibration method |
| CN107370471B (en) * | 2017-06-29 | 2020-06-05 | 中国电子科技集团公司第四十一研究所 | PXI bus programmable amplifier/attenuator and calibration method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20200612 |
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| CF01 | Termination of patent right due to non-payment of annual fee |