CN104378101A - Diverter switch for channel test, method and system - Google Patents
Diverter switch for channel test, method and system Download PDFInfo
- Publication number
- CN104378101A CN104378101A CN201410342018.XA CN201410342018A CN104378101A CN 104378101 A CN104378101 A CN 104378101A CN 201410342018 A CN201410342018 A CN 201410342018A CN 104378101 A CN104378101 A CN 104378101A
- Authority
- CN
- China
- Prior art keywords
- adjustable attenuator
- interface
- line select
- power detector
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention belongs to the communication field, and provides a diverter switch for channel testing, a system and a method. The diverter switch comprises an adjustable attenuator, a circuit selecting circuit, a matched load, a power detector, a coupler, a control interface, a signal input interface and a signal output interface. The output end of the adjustable attenuator is connected with a first circuit selecting pin of the circuit selecting switch, and the first circuit selecting pin of the circuit selecting switch is connected with the input end of the power detector and the signal output interface. A second circuit pin of the circuit selecting switch is connected with the ground through the matched load. The matched load and the adjustable attenuator are arranged in the switch, so that when a radio-frequency channel is disconnected, the port impedance of the channel is effectively guaranteed, port mismatching is avoided when a combiner is used for conducting opening and closing of the channel test, and the diverter switch is suitable for the condition that large difference of the power of different time slots happens.
Description
Technical field
The invention belongs to the communications field, particularly relate to a kind of diverter switch for lane testing, method and system.
Background technology
When testing the wireless index of base station, as the test for TDD base station, because the passage of its test is many, need the cable being connected to different test channel in test process.
When manually connecting the cable of different test channel, need to connect between different cables frequently, the low and troublesome poeration of its joint efficiency.For improving testing efficiency, now using mixer to connect the cable of required test, closing other passage not needing to test by mixer, realizing the quick switching to test channel.
But, when using mixer to switch circuit, power when closing other passage is larger, and the isolation of mixer itself is poor, interference can be introduced to the passage of test, and the impedance of the port of passage shutoff cannot ensure, may cause the mismatch of Combiner port, affect passage to be tested and produce standing wave.In addition, because time-division system has very large difference in each time slot power situation, the power requirement of checkout equipment can not be met.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of diverter switch for lane testing, system and method, with solve prior art use mixer circuit is switched time, power when closing other passage is larger, interference can be introduced to the passage of test, affect passage to be tested and produce standing wave, and the problem of power requirement of checkout equipment can not be met.
The embodiment of the present invention realizes like this, a kind of diverter switch for lane testing, described diverter switch comprises: adjustable attenuator, line select switch, matched load, power detector, coupler, control interface, signal input interface and signal output interface
The input of described adjustable attenuator connects described signal input interface, the output of described adjustable attenuator connects the first line selection pin of described line select switch, the selection pin of described line select switch connects input and the signal output interface of described power detector, second circuit pin of described line select switch is connected to ground by described matched load, and the control end of described control interface and described adjustable attenuator, the output of power detector, the control end of line select switch are connected.
Another object of the embodiment of the present invention is to provide a kind of switched system for lane testing, and described system comprises mixer, control terminal and multiple diverter switch;
Described diverter switch comprises: adjustable attenuator, line select switch, matched load, power detector, coupler, control interface, signal input interface and signal output interface;
The input of described adjustable attenuator connects described signal input interface, the output of described adjustable attenuator connects the first line selection pin of described line select switch, the selection pin of described line select switch connects input and the signal output interface of described power detector, and the second circuit pin of described line select switch is connected to ground by described matched load;
Control end, the power detector of described adjustable attenuator are connected with described control terminal by signal output interface, regulate the value of described adjustable attenuator and control the selection of described line select switch by described control terminal;
The signal output interface of described multiple diverter switch is connected with the input of described mixer, and the output of described mixer can connect the equipment for lane testing.
Present invention also offers a kind of lane testing changing method comprising above-mentioned switched system, it is characterized in that, described method comprises:
Adjustable attenuator described in initialization and described line select switch, select the maximum of attenuator as initialized pad value, and described line select switch is selected to be connected with described matched load;
Receive the test signal of base station to be tested, described line select switch is switched to described adjustable attenuator and is connected;
Read the performance number that described power detector detects;
According to the power interval preset, adjust described adjustable attenuator, the performance number that described power detector is detected belongs to described default power interval;
According to the described adjustable attenuator after described adjustment, to described lane testing.
Opening and closing is carried out by inventing the described passage of diverter switch to test for lane testing, the interference introduced when described mixer switches can be avoided, and by power detection value that control interface transmits when switching, reception arranges instruction to the pad value of attenuator, passage is made to match corresponding matched load and decay, avoid the port mismatch of mixer, affect passage to be tested and produce standing wave.In addition, the performance number that the present invention can be detected according to power detector by control interface adjusts pad value, makes time-division system when each time slot power situation has very large difference, still can meet the power requirement of checkout equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the diverter switch for lane testing that first embodiment of the invention provides;
Fig. 2 is the structural representation of the switched system for lane testing that second embodiment of the invention provides;
Fig. 3 is the realization flow figure of the changing method for lane testing that third embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The diverter switch of the lane testing described in the embodiment of the present invention, can be used for the test to base station multi channel signals, has multiple radiofrequency signal to switch while also may be used for other.By arranging matched load, adjustable attenuator in switch, when radio-frequency channel can be made to disconnect, the effective port Impedance ensureing passage, prevents from occurring port mismatch when using mixer to carry out the opening and closing of lane testing.Separately can send by control interface the performance number detected by power detector, according to detected value, the adjustment to adjustable attenuator can be received, thus the situation of larger difference appear in the power situation that can adapt to different time-gap.
The switched system for lane testing described in the embodiment of the present invention, for a typical apply embodiment to the described diverter switch for lane testing, by multiple diverter switch for lane testing is connected to mixer, by realizing the selection of passage for the diverter switch of lane testing, the interference to other passage brought when mixer place switches can be avoided.
The changing method for lane testing described in the embodiment of the present invention, specifically carries out the step of passage bridge, by the adjustment of adjustable attenuator power, better to adapt to the test request of each passage for using the described switched system for lane testing.Be specifically described respectively below by each embodiment.
Embodiment one:
Fig. 1 shows the structural representation of the diverter switch for lane testing that first embodiment of the invention provides, and details are as follows:
Described diverter switch comprises: adjustable attenuator 11, line select switch 12, matched load 13, power detector 14, coupler 15, control interface 16, signal input interface 17 and signal output interface 18,
The input of described adjustable attenuator 11 connects described signal input interface 17, the output of described adjustable attenuator 11 connects the first line selection pin of described line select switch 12, the selection pin of described line select switch 12 connects input and the signal output interface 18 of described power detector 14, second circuit pin of described line select switch 12 is connected to ground by described matched load 13, and the control end of described control interface 16 and described adjustable attenuator 11, the output of power detector 14, the control end of line select switch are connected.
Wherein, described adjustable attenuator 11, it can be electronic type adjustable attenuator, as selected to pass through microcontroller, as the adjustable attenuator of chip microcontroller, receiving adjustment instruction by single-chip microcomputer, thus adjusted the pad value of described attenuator by single-chip microcomputer, can certainly be the adjustable attenuator of non-microcontroller implementation.In addition, described adjustable attenuator 11 can also comprise manual adjustments button, the mode manually regulated, when the detected value of power detector 14 directly shows, according to the performance number of display, according to manual adjustments button, the pad value of described adjustable attenuator 11 can be adjusted.
When described adjustable attenuator 11 is automatic control mode, the adjustment step-length of described adjustable attenuator 11 can be set, described adjustment step-length is relevant with the range of attenuator and the precision of adjustment, multiple different Adjustment precision can also be set, the coarse adjustment of large step-length is first carried out when adjusting, progressively reduce adjustment step-length again, make the adjusted value of adjustable attenuator more accurate.Certain described adjustable attenuator also for can receiving adjustment instruction or manually adjusting operational order, can directly jump to set pad value.
Described line select switch 12, be single-pole double-throw switch (SPDT), it comprises the control pin that first line selects pin, the second route choosing pin and route choosing pin and line select switch, described first line selects pin to connect described adjustable attenuator 11, described second route choosing pin connects described matched load 13, and described route choosing pin connects described signal output interface 18.Described line select switch can select special route choosing chip.
Described matched load 13, for when disconnecting expanding channels, to twinkling signal release in test channel, to avoid it to produce standing wave in mixer or test channel, affects the measurement of other test channel.The size of described matched load 13 can set according to the size of the power of passage to be tested, generally can set a fixed value, can meet the demands.
Described power detector 14, for detecting the performance number of the test channel after decaying via described adjustable attenuator 11, its object is to the situation of the changed power to inconsiderate test channel, for adapt to changed power excessive time impact on testing equipment, need the performance number according to the performance number adjustment setting detected.
When excessive power being detected for avoiding described power detector 14, affect the lane testing equipment of follow-up connection, the situation that Power Dynamic Range as lane testing equipment is limited, the pad value that can arrange described adjustable attenuator is before testing maximum, and receive the test signal of test channel, and progressively adjust adjustable attenuator according to the performance number that described power detector detects, until be adjusted to the scope that described Air conduct measurement equipment allows.Concrete method of testing describes in detail in the changing method of follow-up lane testing.
Described coupler 15, for connecting described signal output interface 18 and power detector, is divided into two-way with the ratio signal power of test channel set in described coupler, completes Here it is power division.For improving detection power, described power detector 14 can be set for real-time sampling detection, thus the more real-time situation obtaining power stage, adjust the value of adjustable attenuator 11 timely.
Described control interface 16, in optional connected mode, can be local network LAN interface, serial ports or parallel port.
Described local network LAN interface, is mainly used for router and is connected with local area network (LAN), can be connected to control appliance, and by described LAN interface, can connect multiple diverter switch by router.Because Types of Local Area Networks is also diversified, so this lan interfaces type also just determining router also may be various.Different networks has different interface types, common Ethernet interface mainly contains AUI (English full name is Attachment Unit Interface), (English full name is Bayonet Nut Connector to BNC, Chinese full name is bayonet nut connector) and RJ-45 (English full name is Registered Jack45) interface, (English full name is Fiber Distributed-Data Interface to also have FDDI, Chinese full name is Fiber Distributed Data Interface), (English full name is Asynchronous Transfer Mode to ATM, Chinese full name is asynchronous transfer mode), optical fiber interface, these networks have corresponding network interface.
Described serial connection (Serial Interface) refers to that data one ground order transmits, be characterized in that communication line is simple, as long as a pair transmission line just can realize two-way communication (can directly utilize telephone wire as transmission line), thus greatly reduce cost, be specially adapted to telecommunication, but transfer rate is slower.
Described parallel port refers to adopt parallel transmission mode to transmit the interface standard of data.From the simplest parallel data register or special purpose interface integrated circuit (IC) chip as 8255,6820 etc., one until more complicated SCSI or IDE parallel interface, kind has tens of kinds, is characterized in that transmission speed is fast.
Described signal input interface 17, for receiving the signal of passage to be tested, described signal output interface 18, for by decay after Signal transmissions to mixer, with by mixer to passage carry out selections test.
Opening and closing is carried out for the passage of the diverter switch of lane testing to test described in the embodiment of the present invention, the interference introduced when described mixer switches can be avoided, and by power detection value that control interface transmits when switching, reception arranges instruction to the pad value of attenuator, passage is made to match corresponding matched load and decay, avoid the port mismatch of mixer, affect passage to be tested and produce standing wave.In addition, the performance number that the present invention can be detected according to power detector by control interface adjusts pad value, makes time-division system when each time slot power situation has very large difference, still can meet the power requirement of checkout equipment.
Embodiment two:
Fig. 2 is the structural representation of the switched system for lane testing described in the embodiment of the present invention, and details are as follows:
The switched system for lane testing described in the embodiment of the present invention, comprises mixer 21, control terminal 22 and multiple diverter switch 23;
Described diverter switch comprises: adjustable attenuator, line select switch, matched load, power detector, coupler, control interface, signal input interface and signal output interface;
The input of described adjustable attenuator connects described signal input interface, the output of described adjustable attenuator connects the first line selection pin of described line select switch, the selection pin of described line select switch connects input and the signal output interface of described power detector, and the second circuit pin of described line select switch is connected to ground by described matched load;
Control end, the power detector of described adjustable attenuator are connected with described control terminal by signal output interface, regulate the value of described adjustable attenuator and control the selection of described line select switch by described control terminal;
The signal output interface of described multiple diverter switch is connected with the input of described mixer, and the output of described mixer can connect the equipment for lane testing.
The embodiment of the present invention is on the basis of embodiment one, the diverter switch 23 being used for lane testing described in embodiment one is connected to mixer 21 and control terminal 22, the performance number that the power detector that can receive described diverter switch 23 by described control terminal 22 records, and the connected mode of described line select switch is controlled by described control terminal 22, not needing the access to the signal of closing this passage during lane testing, when testing channel signal, when obtaining performance number by described power detector detection, when adjusting the decay of attenuator, thus adapt to the Power Dynamic Range of the testing equipment be connected with described mixer 21.
Wherein, in order to the number of the described diverter switch of more convenient expansion, described signal output interface can be set and be connected with described control terminal by control bus.Optionally, described control interface is local network LAN interface, serial ports or parallel port.
In addition, as wherein a kind of concrete execution mode, described control terminal comprises logic control and communication module and computer terminal, and described logic control and communication module are for receiving the control command of computer terminal, and resolve described control command, be sent to described diverter switch.
The embodiment of the present invention, as the embody rule of diverter switch described in embodiment one, effectively can reduce the coupling of interchannel interference and access port, reduce the standing wave of access port to be tested, the power requirement of better adaptive testing equipment.
Embodiment three:
The schematic flow sheet of the changing method corresponding with switched system described in embodiment two that Fig. 3 provides for the embodiment of the present invention, details are as follows:
The lane testing changing method of switched system described in the embodiment of the present invention, comprises the following steps:
In step S301, adjustable attenuator described in initialization and described line select switch, select the maximum of attenuator as initialized pad value, and described line select switch is selected to be connected with described matched load.
Concrete, for preventing the performance number of test channel excessive, need the value of described adjustable attenuator to be set to maximum, thus the performance number that power detector is detected is unlikely to excessive, also thus can not affect connected mixer and testing equipment.
When the pad value of described adjustable attenuator is set to maximum, the performance number that described power detector detects still is greater than allowed maximum, can send information, change the larger adjustable attenuator of range in time to make staff by control terminal.
In step s 302, receive the test signal of base station to be tested, described line select switch is switched to described adjustable attenuator and is connected.
After setting described adjustable attenuator, described line select switch is switched to described adjustable attenuator and is connected, thus connect the connection line between described base station to be tested and mixer.As the use of test, first can receive the synchronizing signal that described base station sends, further test again after carrying out adjusting described adjustable attenuator according to the performance number of synchronizing signal.
In step S303, read the performance number that described power detector detects.
In step s 304, according to the power interval preset, adjust described adjustable attenuator, the performance number that described power detector is detected belongs to described default power interval;
Wherein, the power interval that described basis is preset, adjust described adjustable attenuator, the performance number that described power detector is detected belongs to described default power interval step and comprises:
Judge whether performance number that described power detector detects is less than the minimum value of default power interval;
If the performance number that described power detector detects is less than the minimum value of default power interval, according to predetermined step-length, reduce described adjustable attenuator, the performance number directly making described power detector detect belongs to described default power interval;
If the performance number that described power detector detects is greater than the maximum of default power interval, then send information, need to change the larger adjustable attenuator of decay range.
Preferably, described default power interval is the power detection scope of lane testing equipment.
Certainly, also can show detected power by control terminal, adjust described adjustable attenuator by staff, or call the pad value prestored.
In step S305, according to the described adjustable attenuator after described adjustment, to described lane testing.
Concrete, specifically can comprise described lane testing according to the described adjustable attenuator after adjustment:
Successively the line select switch of the diverter switch of multiple passages that mixer connects is switched according to preset program, when needs are tested passage, described line select switch connects described adjustable attenuator, when not needing test, described line select switch selects described matched load.Certainly, also can by the control that described control terminal is corresponding the channel selecting of described mixer.
Lane testing changing method described in the embodiment of the present invention, with the switched system for lane testing described in embodiment two, for the diverter switch for lane testing described in the described application of the switched system for lane testing, specifically describe in embodiment one, do not repeat at this.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a diverter switch for lane testing, it is characterized in that, described diverter switch comprises: adjustable attenuator, line select switch, matched load, power detector, coupler, control interface, signal input interface and signal output interface,
The input of described adjustable attenuator connects described signal input interface, the output of described adjustable attenuator connects the first line selection pin of described line select switch, the selection pin of described line select switch connects input and the signal output interface of described power detector, second circuit pin of described line select switch is connected to ground by described matched load, and the control end of described control interface and described adjustable attenuator, the output of power detector, the control end of line select switch are connected.
2. diverter switch according to claim 1, it is characterized in that, described control interface is local network LAN interface, serial ports or parallel port.
3. diverter switch according to claim 1, it is characterized in that, described adjustable attenuator is also by Manual Adjust Attenuation value.
4. for a switched system for lane testing, it is characterized in that, described system comprises mixer, control terminal and multiple diverter switch;
Described diverter switch comprises: adjustable attenuator, line select switch, matched load, power detector, coupler, control interface, signal input interface and signal output interface;
The input of described adjustable attenuator connects described signal input interface, the output of described adjustable attenuator connects the first line selection pin of described line select switch, the selection pin of described line select switch connects input and the signal output interface of described power detector, and the second circuit pin of described line select switch is connected to ground by described matched load;
Control end, the power detector of described adjustable attenuator are connected with described control terminal by signal output interface, regulate the value of described adjustable attenuator and control the selection of described line select switch by described control terminal;
The signal output interface of described multiple diverter switch is connected with the input of described mixer, and the output of described mixer can connect the equipment for lane testing.
5. switched system according to claim 4, it is characterized in that, described signal output interface is connected with described control terminal by control bus.
6. switched system according to claim 4 or 5, it is characterized in that, described control terminal comprises logic control and communication module and computer terminal, and described logic control and communication module are for receiving the control command of computer terminal, and resolve described control command, be sent to described diverter switch.
7. the switched system according to claim 4 or 5, is characterized in that, described control interface is local network LAN interface, serial ports or parallel port.
8. comprise a lane testing changing method for switched system described in claim 4, it is characterized in that, described method comprises:
Adjustable attenuator described in initialization and described line select switch, select the maximum of attenuator as initialized pad value, and described line select switch is selected to be connected with described matched load;
Receive the test signal of base station to be tested, described line select switch is switched to described adjustable attenuator and is connected;
Read the performance number that described power detector detects;
According to the power interval preset, adjust described adjustable attenuator, the performance number that described power detector is detected belongs to described default power interval;
According to the described adjustable attenuator after described adjustment, to described lane testing.
9. changing method according to claim 8, is characterized in that, the power interval that described basis is preset, and adjust described adjustable attenuator, the performance number that described power detector is detected belongs to described default power interval step and comprises:
Judge whether performance number that described power detector detects is less than the minimum value of default power interval;
If the performance number that described power detector detects is less than the minimum value of default power interval, according to predetermined step-length, reduce described adjustable attenuator, the performance number directly making described power detector detect belongs to described default power interval.
10. the changing method as requested described in 8 or 9, is characterized in that, described default power interval is the power detection scope of lane testing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342018.XA CN104378101B (en) | 2014-07-17 | 2014-07-17 | A kind of switching switch for lane testing, method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342018.XA CN104378101B (en) | 2014-07-17 | 2014-07-17 | A kind of switching switch for lane testing, method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104378101A true CN104378101A (en) | 2015-02-25 |
| CN104378101B CN104378101B (en) | 2017-07-21 |
Family
ID=52556801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410342018.XA Active CN104378101B (en) | 2014-07-17 | 2014-07-17 | A kind of switching switch for lane testing, method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104378101B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429714A (en) * | 2015-11-03 | 2016-03-23 | 中国电子科技集团公司第四十一研究所 | T/R assembly tester and security verification method thereof |
| CN105681517A (en) * | 2016-04-16 | 2016-06-15 | 沈珂 | Automation radio frequency test platform |
| CN109067384A (en) * | 2018-09-14 | 2018-12-21 | 北京遥感设备研究所 | A kind of isolation rearrangeable switch |
| CN113037397A (en) * | 2021-03-02 | 2021-06-25 | 苏州天希电子科技有限公司 | 5G antenna interface board port isolation measurement system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040053580A1 (en) * | 2001-01-03 | 2004-03-18 | Mathias Kleinsorge | Transmitting device |
| CN101106787A (en) * | 2006-07-12 | 2008-01-16 | 大唐移动通信设备有限公司 | Base station RF index testing system and method, and RF box for TD-SCDMA system |
| CN101635943A (en) * | 2008-07-24 | 2010-01-27 | 中兴通讯股份有限公司 | Method and device for detecting broadband power |
| CN102457992A (en) * | 2010-10-19 | 2012-05-16 | ***通信集团公司 | Base station equipment |
| CN203504585U (en) * | 2013-10-15 | 2014-03-26 | 上海聚星仪器有限公司 | Multichannel adaption system used for parallel test |
-
2014
- 2014-07-17 CN CN201410342018.XA patent/CN104378101B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040053580A1 (en) * | 2001-01-03 | 2004-03-18 | Mathias Kleinsorge | Transmitting device |
| CN101106787A (en) * | 2006-07-12 | 2008-01-16 | 大唐移动通信设备有限公司 | Base station RF index testing system and method, and RF box for TD-SCDMA system |
| CN101635943A (en) * | 2008-07-24 | 2010-01-27 | 中兴通讯股份有限公司 | Method and device for detecting broadband power |
| CN102457992A (en) * | 2010-10-19 | 2012-05-16 | ***通信集团公司 | Base station equipment |
| CN203504585U (en) * | 2013-10-15 | 2014-03-26 | 上海聚星仪器有限公司 | Multichannel adaption system used for parallel test |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429714A (en) * | 2015-11-03 | 2016-03-23 | 中国电子科技集团公司第四十一研究所 | T/R assembly tester and security verification method thereof |
| CN105681517A (en) * | 2016-04-16 | 2016-06-15 | 沈珂 | Automation radio frequency test platform |
| CN109067384A (en) * | 2018-09-14 | 2018-12-21 | 北京遥感设备研究所 | A kind of isolation rearrangeable switch |
| CN113037397A (en) * | 2021-03-02 | 2021-06-25 | 苏州天希电子科技有限公司 | 5G antenna interface board port isolation measurement system |
| CN113037397B (en) * | 2021-03-02 | 2022-05-13 | 苏州天希电子科技有限公司 | 5G antenna interface board port isolation measurement system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104378101B (en) | 2017-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10455510B2 (en) | Interface device providing power management and load termination in distributed antenna system | |
| CN101782613B (en) | System, device and method for realizing Ethernet power supply function testing | |
| CN104378101A (en) | Diverter switch for channel test, method and system | |
| US9647742B2 (en) | Antenna architecture and operational method for RF test connector reduction | |
| CN111028495A (en) | Method and device for calibrating electric energy meter based on low-power-consumption Bluetooth communication | |
| CN101291506A (en) | TDSCDMA terminal testing system and testing method for transmitter and receiver | |
| CN107612577A (en) | A kind of channel selecting system, method and electronic equipment | |
| CN107995054B (en) | centralized testing device, method and system | |
| US6965735B2 (en) | Method and apparatus for switching automatically and synchronously among optical channels | |
| CN110418369A (en) | A kind of test device | |
| CN100452901C (en) | Transmission method for intermediate frequency pulled distant subsystem of TD-SCDMA base station | |
| CN206585560U (en) | A kind of device for realizing the isolation of 4G and 5G TDD two-way channel simulators automatic transceiving | |
| CN210328001U (en) | Testing device | |
| KR100531619B1 (en) | Apparatus and method of receiving sensitivity measuring for communication system with receiving only path | |
| CN209472629U (en) | RS422 communication and CAN communication equipment based on PCIE bus | |
| CN207266021U (en) | Realize the device and optical line terminal equipment of service signal switching | |
| CN201919001U (en) | Quick automatic commissioning test device for radio frequency indexes of device with multiple radio frequency channels | |
| CN217363063U (en) | 5G NR frequency shift double-channel MIMO power self-balancing system | |
| CN205176076U (en) | Switching device who connects multiport testing arrangement and multiport device | |
| CN102098186A (en) | QSFP (Quad Small Form-factor Pluggable) module detecting system and detecting method | |
| CN105738738A (en) | Radio frequency test device and system | |
| CN204290976U (en) | A kind of simulation repeater | |
| CN210609089U (en) | Bidirectional radio frequency level adjusting circuit for EOC | |
| CN108650032A (en) | A kind of test device and method of the Multi-channel signal selecting automatically controlled | |
| CN220419539U (en) | Short circuit performance test system and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Bin Inventor after: Sheng Sheng Inventor after: Shang Songquan Inventor before: Liu Bin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU BIN TO: LIU BIN MAO SHENG SHANG SONGQUAN |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220822 Granted publication date: 20170721 |
|
| PP01 | Preservation of patent right |