CN202077036U - Single exchange unit - Google Patents
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- CN202077036U CN202077036U CN2011200894966U CN201120089496U CN202077036U CN 202077036 U CN202077036 U CN 202077036U CN 2011200894966 U CN2011200894966 U CN 2011200894966U CN 201120089496 U CN201120089496 U CN 201120089496U CN 202077036 U CN202077036 U CN 202077036U
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/01—Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass production; Testing objects at points as they pass through a testing station
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2844—Fault-finding or characterising using test interfaces, e.g. adapters, test boxes, switches, PIN drivers
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31903—Tester hardware, i.e. output processing circuits tester configuration
- G01R31/31908—Tester set-up, e.g. configuring the tester to the device under test [DUT], down loading test patterns
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- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/3181—Functional testing
- G01R31/319—Tester hardware, i.e. output processing circuits
- G01R31/31917—Stimuli generation or application of test patterns to the device under test [DUT]
- G01R31/31926—Routing signals to or from the device under test [DUT], e.g. switch matrix, pin multiplexing
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Abstract
The utility model discloses a single exchange unit which is used for exchanging radio frequency signals between a tested device and a testing device. In the prior art, the hardware cost for replacing the radio frequency signal exchange unit is high, reconfiguration is slow, and moreover, the testing system investment intensity is high. The signal exchange unit comprises a plurality of input ends and output ends, a controllable switch matrix and a control part, and is characterized in that: the signal exchange unit comprises an electric control part and a configuration memory; the electric control part is different from switches in the switch matrix; and the signal exchange unit is so configured as to respond to a first control command received by the signal exchange unit to change the characteristics of the electric control part, and store information corresponding to the changed characteristics into the configuration memory. Compared with the prior art, the signal exchange unit according to the embodiment of the utility model gives more flexibility, reduces the needed investment, and helps to reduce the delay caused by change made in a test.
Description
Technical field
The utility model relates to the signal exchange unit that is used for exchanging radio frequency signals between device being tested and testing equipment.
Background technology
Radiofrequency signal crosspoint (RF SSU) is for the adopted name that is used in the device of exchanging radio frequency signals between tested radio-frequency unit and testing equipment.Tested radio-frequency unit can be the prototype such as the base station of mobile communication equipment, cellular wireless system or above arbitrary device, it is meant the radiofrequency signal that will be exchanged when writing the application frequency be from a little less than 900MHz to about 2.4GHz.RF SSU is used in the production line of the radio-frequency unit of the above-mentioned type especially, and the purpose of test is to guarantee that the radio-frequency unit of manufacturing will be according to relevant standard and desired value work.RF SSU also is used in product development and validation laboratory, similarly test for the type approval unit of prototype leaved for development or new equipment therein, and in the radio-frequency unit service with repair website and be used, test therein so as that be sure of to serve and/or the radio-frequency unit repaired by it should work like that.
In known RF SSU, the part of essence is the RF switch matrix, and wherein switch can be a solid-state switch, the electromechanical relay, or the two.RF SSU has a plurality of signal input parts and output, and this device on the one hand, is connected with device being tested by these signal input parts and output, on the other hand, is connected with testing equipment.How controller or corresponding unit controls are connected between input and output in switch matrix.Between the central computer of controller and control production line operation data link can be arranged, for example, so in this case data link will be used in and transmit control command and about for example information of the operation of RF SSU.Such information can comprise, the number of times of the switching motion of being carried out by the switch in the RF switch matrix for example is to help the aging of monitoring RF switch.Lost efficacy and distorted signals for fear of function, after the switch motion that reaches pre-determined number, replaced the RF switch usually.
Because prior art RF SSU is unusual certain products, it is with very little batch or even manufactured as unique device.If change of the technical specification of given radio-frequency unit type or the radio-frequency unit of making on production line are replaced by another radio-frequency unit, the RF SSU that then uses in test must be reconfigured.In the prior art, this typically means the hardware of replacement in RF SSU itself, and this spends very high, and make reconfigure very slow.The shortcoming that another of prior art is known is total investment intensity of test macro.Test macro is an entity, and it also comprises a large amount of instrumentations except crosspoint, these instrumentations typically for each specific test macro by selected and adaptive dividually.
The utility model content
The purpose of an embodiment of the present disclosure provides the radiofrequency signal crosspoint, and it is providing more flexibility aspect the design of test macro and the enforcement compared with prior art.Another purpose of an embodiment of the present disclosure provides the radiofrequency signal crosspoint, and it reduces for the assembly of as a whole test macro and safeguards needed investment.Another purpose of an embodiment of the present disclosure provides the radiofrequency signal crosspoint, and it helps to reduce by the time-delay of making in test that change caused.In addition, the purpose of an embodiment of the present disclosure provides the radiofrequency signal crosspoint, and it helps to solve the situation of exception.
The purpose of this utility model is to reach by the structural system of design RF SSU module and the intelligent and electronic controlled built-in function that makes up q.s therein.
A kind of being used at device being tested (101 disclosed, 901) with testing equipment (106,107,906,907,916) signal exchange unit (103 of exchanging radio frequency signals between, 903), described signal exchange unit comprises: be used for that radiofrequency signal is directed to signal exchange unit and be guided out a plurality of inputs and the output (201,202 of radiofrequency signal from signal exchange unit, 918), be used for controllably being made in the controllable switch matrix (104,904) that is connected between input and the output, and be configured to be controlled at switch matrix (104, the control assembly of the connection 904) (105,901); It is characterized in that: signal exchange unit comprises the electric control unit (1001,1003) that is different from the switch in switch matrix; Signal exchange unit comprises the config memory (1005) of storage about the information of electric control unit, and signal exchange unit is configured in response to first control command by the signal exchange unit reception, change the characteristic of electric control unit, and the information corresponding to the characteristic that changes is kept in the config memory.
Preferably, signal exchange unit is configured in response to second control command by its reception the configuration data relevant with the configuration of the change of being made up of the parts in the signal exchange unit is stored in config memory.
Preferably, in switch matrix (104), or along the signal path that is directed to it, have one or more be used for measuring be arranged to advance the transducer (204 of the signal by switch matrix (104), 205), and described signal exchange unit has the control assembly (105) of the use that is configured to the data that control provides by transducer (204,205).
Preferably, described signal exchange unit has and is configured to by transducer (204,205) data of Chan Shenging are taken out control assembly (105) as dateout from the radiofrequency signal crosspoint, and this dateout is arranged to indicate the input attenuation that is connected between input and output and/or is conducted through the reflection loss of the signal of described connection.
Preferably, the signal exchange unit switch has the signal source (301) that is configured to generate the radio frequency testing signal, and described signal exchange unit has and is configured to by a signal that is generated by signal source (301) is coupled to the connection of making is tested in the connection of making in switch matrix control assembly (105) in switch matrix.
Preferably, described signal exchange unit has the control assembly (105) that is configured to be coupled to by the connection protection of prevention use in switch matrix the external device (ED) of input and/or output when the characteristic of this connection of test indication is not in the admissible limits.
Preferably, control assembly has and is configured to store the machine-readable instruction (501 that is used to carry out cycle tests, 601) sequence memory (303), and described signal exchange unit has and is configured to from sequence memory (303) sense order, and the operation of control signal crosspoint, so that carry out the control assembly (105) of cycle tests according to instruction.
Preferably, described signal exchange unit has the order that is used for by means of coming from signal exchange unit, control belong to test macro but at the output (701) of the device (702) of signal exchange unit outside.
Preferably, described signal exchange unit is configured to control test macro robot (702) and passes through output.
Preferably, described signal exchange unit has and is used for the signal conditioner (811,812,813) input and that can be directed into the signal of externally measured instrument from signal exchange unit that preliminary treatment is coupled to signal exchange unit.
Preferably, described signal exchange unit has and is used for adding different signal conditioner (811,812,813) Modularly the standard interface of signal exchange unit to.
Preferably, described signal exchange unit have at least one border of working frequency range can be in response to from the control command of control assembly (105) and the electrically tunable filter (821) and/or the amplifier (822) that are conditioned.
Be characterised in that according to crosspoint of the present utility model it is expressed in the characteristic of independent claims.Dependent claims is described some advantageous embodiments of the present utility model.
This RF SSU can be called as and has built-in RF intelligence.This generalized concept relates to the feature as following listing:
-RF SSU perhaps fully automatically or by by user's simple action, can test the operation of himself relevant with the exchange of radiofrequency signal with diagnosis, and reacts according to the result of the test of its operation;
-RF SSU can adapt to its operation by external command control, or adapts to the operation of the initiative of itself when test philosophy changes;
-RF SSU can be used for giving other device in the test macro control command;
-RF SSU comprises sequence memory, and is configured to carry out the action sequence relevant with test that is stored in the sequence memory.
Not necessarily must comprise the feature of all above-mentioned RF intelligence according to RF SSU of the present utility model, on the other hand, RF SSU also can comprise the further feature that can be considered to RF intelligence except above-mentioned those.
Several advantages can reach by built-in RF intelligence is arranged in RF SSU.Self-test and self diagnosis mean that the real time information about its operation can be collected and keep to device.For example, might come the signal propagation characteristics of measured signal path by the switch matrix of RF SSU, the phenomenon that easier thus differentiation itself is caused by RF SSU and those phenomenons that caused by device being tested, like this, the former influence can be eliminated from test result.Self diagnosis also makes the wearing and tearing of the switch in might the monitoring switch matrix and aging, produce about they report and arrange their replacement so that switch with only when they need be replaced, just be replaced.The part of identical self-diagnosis system also can be used for checking the situation of signal path of those parts of the device that belongs to RF SSU outside.For example, the strong reflection of the radiofrequency signal that is caused by the external device (ED) of fault can be detected before it damages any other device in time.
When RF SSU comprised that electronically controlled filter, amplifier and/or other are controlled the parts of radiofrequency signal, its operation can adapt to new frequency range and need not replace parts, replaced parts and be expensive with time-consuming.Signal Pretreatment in RF SSU is favourable, because the instrument in test macro can be a device that is not too expensive, that have wider use.The ability of controlling other device is meant that RF SSU can be arranged to control example such as robot, and it is placed into test point to device being tested and/or carries out necessary machinery at test period and move on production line.In bigger test macro, given RF SSU also can be used as main frame, and its controls and be provided for being controlled at the parts of other subordinate RF SSU in the same system.Cycle tests is stored in the sequence memory of RF SSU and moves cycle tests therefrom, mean for the control production line as a whole with its more easy requirement of central computer of programming.
Description of drawings
Below with reference to the preferred embodiments and drawings that provide as an example the utility model is described in more detail, wherein
Fig. 1 schematically shows the production line with testing equipment,
Fig. 2 is presented at mutual between switch matrix and the control assembly,
The use of Fig. 3 display source signal in the test that connects,
When the feature that Fig. 4 is presented at connection does not belong in the admissible limits, forbid described connection,
Fig. 5 shows the first step of the execution of cycle tests,
Fig. 6 shows second step of the execution of cycle tests,
Fig. 7 shows the use of the control assembly be used to control external device (ED),
Fig. 8 shows the modular structure system of RF SSU and some parts therein,
Fig. 9 shows the parts of bigger test macro,
Figure 10 is presented at the storage of configuration data in the memory,
Figure 11 configurations shown transfer of data arrives main device,
Figure 12 is presented at and makes change in the configuration data,
The employing of the configuration data of Figure 13 display change,
Figure 14 is presented at and makes change in the hardware configuration, and
Figure 15 shows the employing corresponding to the data of the hardware configuration that changes.
Unit identical on figure is represented with identical Reference numeral.
Embodiment
Fig. 1 schematically shows the illustrative production line that is used to make radio-frequency unit 101.There is test zone 102 at a point place at production line.Test when radio-frequency unit 101 arrives test zone 102, it measures the ability that radio-frequency unit generates certain radiofrequency signal and/or replys certain radiofrequency signal that produces in the radio-frequency unit outside.Test is by means of comprising that the testing equipment that radiofrequency signal crosspoint 103--abbreviates RF SSU--as finishes.The parts of RF SSU comprise switch matrix 104 as shown in Figure 1, and switch matrix can be used for controllably carrying out being connected between input and output; With control assembly 105, be configured to control the connection of carrying out in switch matrix 104.
Schematically be shown as test macro parts be to measure or analytical equipment 106, its function is the signal of measuring or analyzing from tested radio-frequency unit; And outside source 107, its function is to generate radiofrequency signal, this radiofrequency signal is sent to the part of tested radio-frequency unit as test.Schematically be presented at figure the below be central computer system 108, many things that its control is relevant with the operation of production line with supervision.It has bidirectional data transfers with control assembly 105, measurement and analytical equipment 106 and outside source 107 and is connected.Suppose further that here central computer system 108 is controlled the conveying of radio-frequency unit on production line by delivery controller 109.
Fig. 2 is shown in more detail under the situation of example mutual between switch matrix 104 and control assembly.Fig. 2 is presented at many inputs 201 and the output 202 among the RF SSU, is used for radiofrequency signal is sent into RF SSU and taken out radiofrequency signal from RF SSU.Being connected between input and output is made into controllable in the switch matrix 104.It comprises the radio-frequency (RF) switch of many electric control, has shown one of them switch 203 as an example.When we say that control assembly 105 is configured to connect in the control switch matrix 104, this means, determine from the electric control signal of control assembly 105 which radio-frequency (RF) switch of switch matrix 104 is to be in which position.Under the situation of the example that shows on the figure, from the 6th input on the left side with between the 7th top output, be connected, like this, control assembly 105 uses electric control signal to make switch 203 as conducting.
In advantageous embodiments of the present utility model, in switch matrix 104 or along on the signal path that is directed to it one or more transducers being arranged, be used for measuring the signal that is arranged to advance by switch matrix 104.On Fig. 2, such transducer represents that with directional coupler 204 and 205 each generation conduct is advanced by the signal of the expression sample of the radiofrequency signal of transmission line, along placing directional coupler on this transmission line.Control assembly 105 is configured to control the use of the data that transducer provides.Hypothesis is directed into control assembly 105 from the signal of directional coupler on Fig. 2, and control assembly can be transmitted it in this wise, or uses it to generate expression another signal from the signal of directional coupler, and upwards sends it from control assembly 105.Control assembly 105 can also be carried out action with the initiative of itself according to the information that obtains from directional coupler, and does not need to send forward the signal of the signal that expression obtains from directional coupler.
Directional coupler is not can be used for measuring being arranged to advance the transducer of unique type of the signal by switch matrix.The example of the transducer that other is possible comprises power splitter and electric current and voltage detector, but also comprises the transducer of indirect measuring-signal, such as temperature sensor.The utility model is for using which kind of transducer that restriction is not set.
The utility model is the embodiment of the reality of limiting sensor not also.The basic structure of switch matrix can be for example to make it have the low-loss printed circuit board that is applicable to radio frequency, be attached with on it radio-frequency (RF) switch and in its surface with conductive region may be arranged in the intermediate layer.These form transmission line, and signal is advanced between input and output and radio-frequency (RF) switch along these transmission lines.Directional coupler and power splitter are to implement easily, for example by giving suitable shape with the conductive region on the printed circuit board (PCB), just can accomplish.Transducer also may be implemented as discrete component, is attached the suitable position on printed circuit board (PCB).If transducer is embodied in suitable place, switch matrix outside, then might use known integrated sensor together along transmission line or in conjunction with connector.
Fig. 2 shows that entering into control assembly 105 is connected 206 and 207 with the transfer of data of going out from control assembly 105, provides RF SSU the data link of outside.Possibility is that control assembly 105 is configured to obtain data that the one or more transducers by RF SSU outside produce as dateout, is illustrated in input and advances by the reflection loss of this connection with input attenuation that is connected and/or signal between the output.Let us hypothesis, for example, the power level of the signal by connection shown in Figure 2 of advancing is measured and is measured once more at output by directional coupler 205 at input end by directional coupler 204.Difference between these two measured values represents how many signals is attenuated when advancing by switch matrix 104.If whether the purpose of test is to measure from the power level of the radiofrequency signal of tested radio-frequency unit in the limits that allows, if then have at the same time available, cause the real time information of how many losses by the switch matrix of RF SSU about advancing by signal, so, the reliability of measurement will be improved greatly.
It is not the inference of the situation (decay, reflection or the like) of the appearance in RFSSU but outside it that the information that obtains from transducer also can be used for making about its reason.The polarity of directional coupler determines which signal it measures.Have the directional couple device of prior art electric control, by means of it, it is to measure the radiofrequency signal that propagates into output from input that control assembly 105 can be selected, and still measures radiofrequency signal conversely.Also can use other controllable or two-way transducer.
Measure as the signal power level of the part of the test of device being tested and to finish by the transducer in the switch matrix usually undesirablely.Typically, need higher relatively precision in test, if transducer is done to such an extent that enough accurately reach needed precision, then the manufacturing cost of RF SSU will become unnecessarily high.Transducer should be done enough sensitively, and with the feature of enough precision supervisory signals, like this, the example that transducer described herein uses is enforceable.
Measurement and RF SSU self diagnosis can not be that the signal that comes from RF SSU outside is finished by using yet.Fig. 3 schematically shows the RF SSU according to embodiment of the present utility model, and its internal signal sources 301 is configured to generate the radio frequency testing signal.Control assembly 105 is configured to test the connection of making in switch matrix 104 by the signal that generates is coupled to the connection of making in switch matrix 104 in internal signal sources 301.On Fig. 3, suppose that switch matrix 104 comprises the change over switch that is used for it, has shown change over switch 302 as an example.In the present embodiment, the power level of advancing by the radio-frequency (RF) switch 203 and the signal of the remainder that is connected is also measured by directional coupler 205.
The device of Fig. 3 is specially adapted to RF SSU self diagnosis.Radio-frequency (RF) switch in switch matrix 104 has limited useful life when the work operation.In the prior art, the manufacturer of RF switch typically stipulates the maximum service life (MSL) in the number of times of chronomere or the switch that carries out (or the two), surpasses not guarantee that later on the RF switch is by working like that of planning.From the RF SSU of prior art, known have a switch counter, and it counts each RF switch accumulation carrying out how many times switch.Yet when the RF switch reached their maximum life, they must be replaced-not have any real knowledge that whether still can be used about them.On the other hand, some switch possibility even wear damage are faster compared with expection, and like this, in the prior art solution, they may be introduced and be difficult to controlled measure error.
If between two devices being tested, for example changing the time durations that device being tested spent in a word, for the self diagnosis that carries out according to Fig. 3 that is connected of some RF switch at least and they, then the result is the real time monitoring of the condition of RF switch.Control assembly 105 can be programmed, if so that self diagnosis shows all in order, then the test of radio-frequency unit can continue normally to carry out, and arrives even the switch counter shows the maximum service life (MSL) of RF switch.In addition; control assembly 105 can be programmed to operation in this wise; if so that certain other parts operation irregularity or fault in self diagnosis indication RF switch or the switch matrix 104; then generate Trouble Report, maybe may make test stop to proceed till parts that lost efficacy or fault are replaced.
The use of internal signal sources 301 brings another great advantage, that is, the characteristic of Lian Jieing is not in the possibility that the situation in the admissible limits is protected for the external device (ED) that is coupled to RF SSU input and/or output therein.Here, " characteristic of connection " can broadly be interpreted as and refer to all characteristics, can obtain information by the signal that measurement is advanced by switch matrix 104 from these characteristics.The let us hypothesis, for example, as the part of test, the signal that is generated by the RF amplifier must be coupled to load via switch matrix 104, such as antenna.If the antenna defectiveness, so that it causes the very strong reflection at the signal that is fed to antenna of certain frequency range, the power level that then is reflected back toward the RF amplifier can be high like this, so that damage the RF amplifier.
Device according to Fig. 3 might be made sequence, wherein at first is made to (for example, antenna) the coupling, but be not the signal of using from the external RF amplifier, but the signal from internal signal sources 301 at first is fed to it of tested load.If necessary, but its power level and/or the variation of frequency Be Controlled ground, and the while is by means of the reflection loss of directional coupler 205 measuring-signals.If in reflection loss is measured, do not find abnormal things, the selection input signal that can--be the external RF amplifier--then and finish the test of device being tested safely by switch transition switch 302 with from suitable source.
Fig. 3 is display-memory 303 schematically, and it can be used for storing all machine-readable instructions, and all action sequences described herein are implemented in these instructions when being carried out by control assembly 105.As mentioned above, the test of the connection of making in switch matrix is such sequence, but term " sequence " also can be meant a series of test measures of finishing on device being tested.
Fig. 4 is as flow chart, and the characteristic how display control unit spare is configured to when this connection of test indication is not the external device (ED) that is coupled to input and/or output when being in the admissible limits by the use protection that stops the connection in switch matrix.In step 401, make predetermined connection, this for example is by closed RF switch in switch matrix, this causes the route of wanting to reach between given input and given output.In step 402, for example by using certain change over switch to come to test this connection from the input signal that the internal signal sources of RF SSU is selected to be used to connect.Step 402 also can comprise the adjusting of the power level and/or the frequency of input signal, so that cover power and/or the frequency range of wanting.
In step 403, check whether the characteristic (on the meaning of broad sense, that is, comprising the device of RF SSU outside) that connects is in the admissible limits.Here, suppose that memory (at 303 on Fig. 3) comprises some desired value and the measurement finished by means of the transducer in switch matrix provides measurement result, and these measurement results and the desired value of being stored are compared by control assembly.If all characteristics of being checked are in the admissible limits,, allow to be used to test the connection of device being tested then in step 404.If desired value is exceeded,, stops and use this connection then according to step 405.This prevention also can cause addition thereto, supervises test such as prompting center system and/or user, if or-surpassing of desired value obviously is to cause-be used for the order of mobile this specific DUT to the next door of production line by the fault in the device being tested.
Fig. 5 and 6 shows the example of the internal sequence memory that uses RF SSU.Control assembly 105 comprises or is linked into sequence memory 303 that it is configured to store the machine-readable instruction that is used to carry out cycle tests.Control assembly 105 comprises microprocessor or controller, is configured to from cycle tests memory 303 sense orders, and the operation of control RF SSU, to carry out cycle tests according to instruction.On Fig. 5, presumptive instruction 501 is read out from sequence memory, and according to this instruction, control assembly 105 is made in being connected between the 6th input and the 7th output, and begins to measure the characteristic of the signal by the connection done of advancing.On Fig. 6, presumptive instruction 601 is read out from sequence memory, and according to this instruction, control assembly 105 is made in being connected between four-input terminal and the 5th output, and begins to measure the characteristic of the signal by the connection done of advancing.
The design and the enforcement of the center system of the operation of controlling production line has been simplified in the use of the sequence memory in RF SSU.In more previous solution, wherein RF SSU comprises the intelligence that seldom or does not comprise itself, and cycle tests must be programmed for the part of the operation of center system clearly.In this solution of novelty, center system only need be given an order and be started test and from the control assembly acceptance test result of RF SSU.Test itself and each different stage in succession thereof are left RF SSU for.
For keep figure clear for the purpose of, hypothesis is once only made a connection in switch matrix in example described above.Yet, obviously, in according to RF SSU of the present utility model, can make several connections simultaneously, different connections be connected the test of carrying out by these can be in the different duration, partially or completely take place overlappingly, control assembly can differently be dispatched the measurement of different connections and diagnosis or the like.
Control assembly is a programmable device, and it also can be used for producing and distributing the device that control command arrives RF SSU outside.Fig. 7 shows how RF SSU has output 701 and be used to control and belong to test macro but at the example of the device of RF SSU outside.In the example of Fig. 7, control assembly 105 especially is configured to belong to test macro and the robot 702 with the task in the test fixture 703 that in the duration of test tested radio-frequency unit 101 is placed on via output 701 controls.Can by from the order of RF SSU control, belong to test macro but comprise at other example of the device of RF SSU outside, for example, the machine vision device of externally measured instrument, external signal and input source, implementation and/or supervision test and in the test point at certain other parts place of production line, the test of finishing therein is so simple so that for the whole test macro that separates of its structure be infeasible.
Fig. 7 is presented at the various types of the interface in the control assembly 105 and the example of purposes.GPRS (General Packet Radio System) represents wireless middle distance or length here apart from Radio Link, and it can be used for, and for example, sends warning message to predetermined phone numbers via cellular wireless networks.GPIB (general-purpose interface bus) is the example that is used to implement the general digital control bus of local control connection.USB (USB) is another example of general wired local bus.LAN (local area network (LAN)) expression is used to be implemented in any wired or wireless technology of the local control connection between the device.
The following part of shown interface comprises the example that can make the more physics rank interface that is used for that external signal is directed to control assembly 105 and is guided out from control assembly 105.DIO (digital input and output) is meant any digital input or output interface.ADC (analog to digital conversion) is meant that control assembly 105 can receive the interface of arbitrary mould analog signal by it, this analog signal is converted into number format in control assembly or in connected auxiliary circuit, like this, it can be more easily processed in control assembly.DAC (digital to analogy conversion) is meant the interface of the analog output signal that control assembly 105 can be wanted by its generation, though this signal is digitally handled in control assembly 105.DMM (digital multimeter) is meant that control assembly 105 can be by its measurement interface that receives external voltage, electric current or other signal, and the level of this signal is that it will be measured.RS-485 is the control bus according to known bus standard, and control assembly 105 can be communicated by letter with other device that is connected to identical system by it.Identical control bus also can be used for control switch matrix 104, if it comprises its bus control unit.
A favourable possibility is to make up RF SSU, so that it can arrive device being tested to software loading in conjunction with test.This is called as quickflashing, because software usually is loaded onto in the flash memory of device being tested.The software that is loaded can be stored in the memory of control assembly 105, and one of its above-mentioned interface can have and being connected of anchor clamps 703, and loading can be finished by it.
Fig. 8 is the example of the modular structure of RF SSU, and is the example how parts different in an example components are placed on equipment supporter in a row.Equipment supporter for example can be 19 * 19 inches supports of standard.Top one row who shows on Fig. 8 is the core cell of RF SSU, and it comprises switch matrix 104, internal signal sources 301, processor parts 801, I/O controller part 802 and power supply 803.In these parts, processor parts 801 and I/O controller part 802 are formed in the above entity that is called as control assembly 105, and it also comprises above-mentioned sequence memory 303.Power supply 803 converts the electricity that is fed to RF SSU to the needed supply voltage of various parts by it, typically 28 volts of DC power supply.The height of the core cell on 19 * 19 inches supports for example, can be a unit (1U).
Then, on Fig. 8 measuring unit, its height on 19 * 19 inches supports can be 1 to 4 unit (1U-4U).It comprises signal conditioning equipment, is used for the signal that preliminary treatment is coupled to the input of RF SSU, and this signal can be directed into externally measured instrument from RF SSU.The example of signal conditioning equipment comprises that the measuring unit 811 of forgery, Tx/Rx divide measuring unit 812 and low noise amplifier (LNA) measuring unit of opening 813.Different test macros may need different signal conditioners, so RF SSU should have standard interface, is used for various signal conditioner Modularlies are added to RF SSU.Standard interface comprises the mechanical couplings parts, is used for being made to the suitably coupling of the shell of height of equipment supporter, and bus is connected with signal, is used for connection control signal and measuring-signal.
The second minimum unit is a tuner unit on Fig. 8, and its height on 19 * 19 inches supports can be 1 to 4 unit (1U-4U).It comprises tunable parts, and by means of it, the operation of RF SSU can adapt to different frequency ranges.For example, if introduce new frequency range in device that will be tested, such as the new frequency range of cellular wireless system, then the RF SSU most probable of prior art needs very big reconstruction.RF SSU on Fig. 8 can move and be made in new frequency range by being tuned at the parts in the tuner unit, if so that want, operates in new frequency range.
The example of the device in tuner unit comprises the filter 821 and the amplifier 822 of electric tuning, and wherein at least one border of working frequency range can be conditioned in response to the control command from control assembly.Also can use other electric tuning device 823.As under the situation of measuring unit, RF SSU should have the standard interface that is used for different tunable devices Modularlies is added to the tuner unit of RF SSU.
In the bottom of Fig. 8, shown instrument unit, as signal power level processing unit 831, frequency spectrum analyser 832 and signal source 833 with example components.Device in the instrument unit is advantageously followed some widely used standard of instruments, such as PXI (being used for the PCI expansion of instrument).In some test macro at least, so-called externally measured instrument can be with the instrument that belongs to the instrument unit, and promptly the instrument of RF SSU inside is replaced.As under the situation of measuring unit and tuner unit, RF SSU should have the instrument unit that is used for different measuring instrument Modularlies is added to the instrument of RF SSU.
Fig. 9 shows the part of the bigger test macro that comprises a plurality of RF SSU.Fig. 9 is presented at the mode of implementing semi-automatic calibration or error correction among the RF SSU.Semi-automatic operation like this can in addition therein switch matrix do not comprise be used for measuring be arranged to advance the transducer of the signal by switch matrix or wherein such transducer for a certain reason or other reason be implemented wanting effective all calibrations and/or error correction to measure among the RF SSU that can not be used or preferably not be used.
RF SSU 903 according to Fig. 9 can be used in exchanging radio frequency signals between device being tested and testing equipment.Fig. 9 shows will four tested devices, reference device 901 wherein as an example." device being tested " is abbreviated as DUT.The example of testing apparatus comprises signal generator 906, signal analyzer 907 and low noise carrier generator 916.
RF SSU 903 has a plurality of inputs and output, is used for radiofrequency signal is directed to device and is guided out radiofrequency signal from device, and controllable switch matrix 904, is used for controllably being connected between input and output.In this example, switch matrix 904 is 4 * 8 matrixes, this means, can be connected between eight ports on four ports on the left side and the right side.The switch matrix of other size also is fine naturally.
It seems that from the operation viewpoint above-mentioned port is a bidirectional port, that is, each port of four ports or eight ports can be used as input port or output port on demand.In the configuration of Fig. 9, dexter port in principle with DUT by being connected over the ground, like this, the a pair of port that shows above figure is used as input port, be used for signal is directed to switch matrix 904 from DUT, and the port of below is output port, is used for signal is directed to DUT from switch matrix 904.The port of left-hand side, the top is used as input on Fig. 9, being used in the future, the signal guidance of automatic signal generator 906 arrives switch matrix 904, the second uppermost port is used as output, be used for and be used as from the input of low noise carrier generator 916 from the signal guidance of switch matrix 904 port to signal analyzer 907, the three left-hand sides.
The RF SSU 903 of Fig. 9 also comprises control assembly 905, is configured to the establishment of connection in the control switch matrix 904.For the purpose of figure is clear, be not presented at being connected between control assembly and the RF SSU on Fig. 9.Other favourable function of control assembly 905 is more closely described in this document back.
Fig. 9 especially shows the coupling that can make for the semi-automatic calibration of RF SSU or error correction." semi-automatic " here is meant for some cable is connected to suitable connector needs user interactions, but after this, calibration or error correction can be proceeded without user interactions.Calibration or error correction are meant how influenced measuring-signal is when signal passes through RF SSU or it a part of via certain propagated, and store one section information of describing measurement result, like this, the phenomenon that is caused by RF SSU can suitably be compensated when DUT measures.
In order to implement this coupling, be disconnected connection and with the measurement cable replacement of wattmeter 910 at the DUT that topmost shows (or at least to its output).905 have Short range data link from wattmeter 910 to control assembly.On Fig. 9, this data link is implemented with usb bus, but it can be implemented by any other technology that use can be applicable to the short-range data transmission between two electronic equipments.Notion is for calibrating or error correction with the connection implementation between the device being tested topmost at signal generator 906.The power level of coming the signal of automatic signal generator 906 is known, or it otherwise can be instructed to control assembly 905, so measure when being directed to the power level of the output of DUT topmost when wattmeter 910, can calculate the decay that in RF SSU, takes place.Information about measured power level is arrived control assembly 905 by automatic the transmission by Short range data link.
For any connection of RF SSU, can carry out similar semi-automatic measuring, when measuring, except wattmeter, also can use other instrument naturally.An advantage of semi-automatic calibration or error correction is that it can carry out temporarily under the control of the computer that is connected with RF SSU.Fig. 9 shows typically (portable) computer 911 of the outside that is connected with control assembly 905 by STD bus, and this control assembly is controlled the transfer of data between computer.Outer computer can be connected to the USB connector, for example, and the special PC connector of making.
Outside computer 911 can comprise and be used to calibrate or the Control Software of error correction, and it comprises necessary order subprogram on the one hand, is used for controlling during calibration and error correction control assembly 905; On the other hand, necessary user interface is calibrated interim connection that needs with error correction to instruct the user to make.Under the situation of Fig. 9, for example, calibration can instruct the user to disconnect with error correction software to be connected related DUT, substitute it with wattmeter 910, signalization generator 906 generates needed test signal, and when the elementary measurement of these and/or other necessity is finished, push certain button or otherwise indication to computer.After this, calibration and error correction software can be notified control assembly 905: calibration or error correction are finished in the path from certain input to certain output, control assembly 905 is known the connection of making correspondence in switch matrix 904 thus, receive and preserve measurement data from wattmeter 910, if necessary, carry out the signal level that needs and/or the calculating that decays.
According to this identical principle, might carry out here previously measurement and action for all correspondences of describing based on all automatic measurement of the internal sensor of switch matrix.
The controllability flexibly of using with being connected of sizable switch matrix that all 4 * 8 matrixes as shown in Figure 9 are such has great advantage, and several (reaching four on Fig. 9) DUT can be coupled to RF SSU simultaneously.Measuring Time that show, measuring instrument is divided between DUT on the left side of Fig. 9, so that can reach very high utilance for measuring instrument in the continuous industry of wanting tested device is produced.This is important, because measuring instrument is expensive, their needed interests that obtain from investment are proportional to utilance and increase, that is, instrument is in that part of using and not having the time that idle waiting measures next time therebetween.
The favourable characteristic of other of the RF SSU that shows on Fig. 9 comprises the possibility of sub-frequency clock signal, the use of internal signal generator and inner wideband noise generator.Be included in clock signal frequency divider 910 in the device from clock (typically, external clock, not shown on Fig. 9) receive clock signal, this clock signal for example can be the 10MHz clock signal from the GPS receiver.In many Test Application, advantageously, for example use the accurate and clock signal synchronous of different frequency, be used for measuring equipment, like this, clock signal frequency divider 912 is made necessary frequency division, and the reference clock signal that finally obtains is delivered to suitable output 913.Specific reference clock signal can be fetched, and for example by means of external cable (not shown on Fig. 9), is added to certain measuring instrument or device being tested.
Previous described those content application about the use of internal signal sources in RF SSU arrive internal signal generator 910.Even do not have integrated sensor or preferably do not use under the situation of such transducer at switch matrix 904, internal signal generator 914 also can produce the input signal that for example needs when test or calibration.Typically, its precision and noise characteristic are not as the external signal generator--and those of Reference numeral 906--on Fig. 9 are good like that, so when the measuring accuracy requirement is not too strict, typically use internal signal generator.Control connection is typically arranged in RF SSU, and by means of it, control assembly 901 can be controlled internal signal generator 914.The output signal of internal signal generator 914 can be directed into the connector place that switch matrix 904 and/or it can be made on the outer surface of device in RF SSU available, from this connector, it can be got the input that is directed to switch matrix 904 by cable when needed, or is got the input of the device that will be connected to RF SSU.For the purpose of figure was clear, being connected on Fig. 9 of internal signal generator was not shown.
Inner wideband noise generator 915 is a kind of special internal signal generators.It is for example when relating to receiving terminal filtering or other such function for the test of DUT, and wherein DUT must be correctly during in response to the input signal of some frequency, advantageously used.In exemplary coupling, RF SSU combination is by inner wideband noise generator 915 noise that generates and the carrier wave that is generated by low noise carrier generator 916, and generation will be passed to the test signal of device being tested.The advantage of such device is that the externally measured instrument that is connected to RF SSU does not need very complicated signal generator, as long as the low noise carrier generator just can satisfy.For clarity, wideband noise generator 915 be connected on Fig. 9 not shown.
Randomly, internal element or the external unit implemented in conjunction with identical device can be structured among the RF SSU, are used for full-automatic calibration." automatically " here be meant, calibration or error correction just can be carried out without user interactions ground the user starts it or starting command and arrives from the computer software of the operation of control RF SSU with control command after fully.Especially, " automatically " is meant, the user does not need to disconnect connection or connect any cable, or takes any other hardware configuration measure to carry out calibration or error correction.
Fig. 9 shows the automatic alignment unit 917 of RF SSU inside as an example, and it can be unit separately, and as in this example, or it can be included in the control assembly 901.Automatically alignment unit is linked into the device of the necessity that is used to connect, and by means of it, can be directed into the appropriate signals path by calibration or the needed measurement of error correction.On Fig. 9, as an example, suppose that alignment unit 917 is connected to interface block 918 automatically, by it, is made to the connection of DUT.When automatic calibration beginning, alignment unit 917 control interface piece 918 in this wise for example automatically, so that the switch of electric control is connected between input port and output port, output port is directed to device being tested usually.Therefore, signal from signal generator 906 origins for example, is not directed into device being tested, but getting back to signal analyzer 907 via switch matrix 904, the result who obtains thus can be used in relevant calibration in the path of advancing with signal or error correction.Certainly, except interface block 918, can also be at the switch of controlling by automatic alignment unit along other place of signal path.
Fig. 9 also shows the example of the principle of link RF SSU.In traditional test macro, the substantive test functional block must be concentrated in the central point of production process, because preferably do not send test massage in the extension of the length of RF cable.The link that shows on Fig. 9 allows to introduce the test macro of evacuating, and wherein a plurality of RF SSU take one's test.In them one, Reference numeral is 903 on Fig. 9, is master unit, remaining is a slave unit.In slave unit, Fig. 9 very schematically shows RF SSU 920 and 930.Communication between RF SSU is undertaken by data communication bus; Fig. 9 shows the RS-485 bus as an example.
Each RF SSU is connected with measuring instrument locally, and these measuring instruments are that the test of finishing at this specified point place is needed.Similarly, each RF SSU is connected with the DUT that is in by in the zone of this specific RF SSU management locally.Each RF SSU can have its sequence memory, in this case, to control the test of being undertaken by the RF SSU that is discussed from the instruction that memory is read to step one by one, or alternatively, at least some instruction can be to come from master unit via control bus (being the RS-485 bus here).Communication between RF SSU and cooperation are by parallel IOC (PIOC) control that is positioned at each unit, and PIOC 921 and 931 is shown as an example.PIOC can be identical with the control assembly of RF SSU, or it can be an assembly of the control assembly of RF SSU.
Figure 10 is presented at the principle about the information of the configuration of RF SSU and/or coupled external component of storage in the control assembly of RF SSU.On Figure 10, suppose that RF SSU comprises signal path, it comprises RF SSU parts inside, electric control, they are the switches that are different from the switch matrix.As an example, signal path comprises tuned amplifier 1001, filter 1002 and variable attenuator 1003.These parts only are examples arbitrarily, in no case comprise which and which kind of parts be restricted to RF SSU according to RF SSU of the present utility model, or how those parts are by electric control.The PIOC 1004 of RF SSU comprises or is linked into config memory 1005, therein in conjunction with the manufacturing storage of the RF SSU information (particularly signal path wherein) about the configuration of RF SSU.As an example, Figure 10 shows the data 1006 relevant with above-mentioned signal path.
According to aspect of the present utility model, in response to control command, RF SSU be configured to change the parts of electric control in the unit characteristic and corresponding to the information stores of the characteristic that changes in config memory.
When test macro put together, possible subordinate RF SSU sent the control assembly of their configuration data to master unit, and this control assembly storage is used for the configuration data of whole test system.Figure 11 shows that schematically the configuration data 1006 of subordinate RF SSU 1101 is delivered to the control assembly 1103 of master unit 1102.Be connected to test macro if having the computer 1104 of appropriate software, then system configuration data can be watched on the display of computer.In an advantageous embodiments of the present utility model, system configuration data with the form of circuit diagram or other suitable figure by figure be presented on the display of computer 1104, and when the user selected parts on the figure, the window that comprises about the more detailed information of parts was displayed to him or she.Computer 1104 can be the computer that temporarily is connected in the system at platform location place, or it can be by data transmission network or other communication network of being connected to by the master unit 1102 by test macro, is connected to the computer of test macro.
Figure 12 and 13 principles that show according to advantageous embodiments of the present utility model, wherein not needing hardware component or connection to make reconfiguring of change can easily and apace finish.Let us hypothesis, for example, the user wants the operation of tuned amplifier on the signal path of the RF SSU that changes in subordinate, so that the previous numerical value YY1 of variable characteristic XX becomes YY8.Advantageously, the user provides appropriate command by the new numerical value YY8 of input in the field suitable in window, is opened during parts that this window is selected to be discussed on the figure that is shown by computer 1104.Computer sends the control assembly 1103 of new configuration data to master unit 1102.It recognizes that the data of change relate to the RF SSU 1101 of subordinate, and sends data 1201 to suitable substance P IOC 1004 via the RS-485 bus.
According to Figure 13, when PIOC 1004 receives the data 1201 that change, it stores the data in config memory 1005, and send new numerical value YY8 to tuned amplifier 1001, subsequently, the change of being made by the user comes into force, and the operation of tuned amplifier is changed on the signal path of being discussed, so that the numerical value of variable characteristic XX is YY8.
Figure 14 shows the wherein reformed situation of hardware configuration of RF SSU, for example because the change amount of the test request of device being tested greater than the amount that just in time can finish by making software change for the influential numerical value of operation of parts in old hardware configuration.Under this routine situation, suppose that the previous signal path of describing is changed now, like this, variable attenuator is removed, and band pass filter substitutes with low pass filter.Certainly, it can be any configuration change of RF SSU, and for this change, data must be stored in the test macro technical specification.And, though change in this example is what to make in the RF of subordinate SSU 1401, changes and also can in master unit, make.In this case, the change of hardware configuration is the first step of change process, by several 1 expressions that add circle of Figure 14.
Above Figure 14, be presented at the second step computer 1104 on the figure and be used for creating circuit diagram, wherein the order of parts and they is corresponding to new hardware configuration, and wherein the influential numerical value of the operation of parts correctly stipulated.The data of these changes are sent to the control assembly 1103 of master unit 1102.Control assembly 1103 recognizes that the data of change relate to the RF SSU 1101 of subordinate under the situation of the parts numerical value that changes as above, and sends data 1201 to suitable substance P IOC 1004 via the RS-485 bus.The transmission of data is third steps of change process.
According to Figure 15, when PIOC 1004 received the data 1402 that change, it stored the data in config memory 1005.When hardware changes when being made, the numerical value of units of variance correctly is provided with, but according to Figure 15, and PIOC 1004 also can send the variable parts of suitable target value to the signal path, is tuned amplifier 1001 in this example.Operation according to Figure 14 and 15 means, even after hardware configuration changes, also can in all parts of test macro, keep about current configuration real time information, and make software change for the influential numerical value of the operation of units of variance.
More than we have discussed the parts of main electric control in the RF of the subordinate SSU, but obviously, if master unit comprises the parts of the electric control that is different from the switch in switch matrix, then the configuration data of master unit is stored in its config memory, and it can be to be changed with the above the sort of identical mode of describing with respect to configuration and the configuration data of the RF SSU that changes subordinate.
Claims (12)
1. signal exchange unit (103,903) that is used for exchanging radio frequency signals between device being tested (101,901) and testing equipment (106,107,906,907,916), described signal exchange unit comprises:
-be used for radiofrequency signal is directed to signal exchange unit and is guided out a plurality of inputs and the output (201,202,918) of radiofrequency signal from signal exchange unit,
-be used for controllably being made in the controllable switch matrix (104,904) that is connected between input and the output, and
-be configured to be controlled at the control assembly (105,901) of the connection in the switch matrix (104,904);
It is characterized in that
-signal exchange unit comprises the electric control unit (1001,1003) that is different from the switch in switch matrix;
-signal exchange unit comprises the config memory (1005) of storage about the information of electric control unit, and
-signal exchange unit is configured to change the characteristic of electric control unit in response to first control command by the signal exchange unit reception, and the information corresponding to the characteristic that changes is kept in the config memory.
2. according to the signal exchange unit of claim 1, it is characterized in that, signal exchange unit is configured in response to second control command by its reception the configuration data relevant with the configuration of the change of being made up of the parts in the signal exchange unit is stored in config memory.
3. according to the signal exchange unit of claim 1 or 2, it is characterized in that,
-in switch matrix (104), or along being directed to its signal path, have one or more be used for measuring be arranged to advance the transducer (204,205) of the signal by switch matrix (104), and
-described signal exchange unit has the control assembly (105) of the use that is configured to the data that control provides by transducer (204,205).
4. according to the signal exchange unit of claim 3, it is characterized in that,
-described signal exchange unit has and is configured to by transducer (204,205) data of Chan Shenging are taken out control assembly (105) as dateout from the radiofrequency signal crosspoint, and this dateout is arranged to indicate the input attenuation that is connected between input and output and/or is conducted through the reflection loss of the signal of described connection.
5. according to the signal exchange unit of claim 3, it is characterized in that,
-described signal exchange unit has the signal source (301) that is configured to generate the radio frequency testing signal, and
-described signal exchange unit has and is configured to by a signal that is generated by signal source (301) is coupled to the connection of making is tested in the connection of making in switch matrix control assembly (105) in switch matrix.
6. according to the signal exchange unit of claim 5, it is characterized in that,
-described signal exchange unit has the control assembly (105) that is configured to be coupled to by the connection protection of prevention use in switch matrix the external device (ED) of input and/or output when the characteristic of this connection of test indication is not in the admissible limits.
7. according to the signal exchange unit of claim 1 or 2, it is characterized in that,
-control assembly has the sequence memory (303) that is configured to store the machine-readable instruction (501,601) that is used to carry out cycle tests, and
-described signal exchange unit has and is configured to from sequence memory (303) sense order, and the operation of control signal crosspoint, so that carry out the control assembly (105) of cycle tests according to instruction.
8. according to the signal exchange unit of claim 1 or 2, it is characterized in that, described signal exchange unit has the order that is used for by means of coming from signal exchange unit, control belong to test macro but at the output (701) of the device (702) of signal exchange unit outside.
9. according to the signal exchange unit of claim 8, it is characterized in that described signal exchange unit is configured to control test macro robot (702) and passes through output.
10. according to the signal exchange unit of claim 1 or 2, it is characterized in that, described signal exchange unit has and is used for the signal conditioner (811 input and that can be directed into the signal of externally measured instrument from signal exchange unit that preliminary treatment is coupled to signal exchange unit, 812,813).
11. the signal exchange unit according to claim 10 is characterized in that, described signal exchange unit has and is used for adding different signal conditioner (811,812,813) Modularly the standard interface of signal exchange unit to.
12. signal exchange unit according to claim 1 or 2, it is characterized in that described signal exchange unit has at least one border of working frequency range can be in response to from the control command of control assembly (105) and the electrically tunable filter (821) and/or the amplifier (822) that are conditioned.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20100158U FI8789U1 (en) | 2010-03-30 | 2010-03-30 | Signal Switching Unit |
| FIU20100158 | 2010-03-30 |
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| Publication Number | Publication Date |
|---|---|
| CN202077036U true CN202077036U (en) | 2011-12-14 |
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|---|---|---|---|
| CN2011200894966U Expired - Lifetime CN202077036U (en) | 2010-03-30 | 2011-03-30 | Single exchange unit |
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|---|---|
| CN (1) | CN202077036U (en) |
| FI (1) | FI8789U1 (en) |
| SE (1) | SE535114C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615039A (en) * | 2014-09-22 | 2015-05-13 | 中国电子科技集团公司第四十一研究所 | USB interface control expandable multi-channel radio frequency switch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3860005B1 (en) | 2020-01-28 | 2023-02-22 | Rohde & Schwarz GmbH & Co. KG | System and method for calibrating a multi-channel radio frequency signal generation system |
-
2010
- 2010-03-30 FI FI20100158U patent/FI8789U1/en not_active IP Right Cessation
- 2010-04-13 SE SE1000372A patent/SE535114C2/en unknown
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615039A (en) * | 2014-09-22 | 2015-05-13 | 中国电子科技集团公司第四十一研究所 | USB interface control expandable multi-channel radio frequency switch device |
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| Publication number | Publication date |
|---|---|
| SE1000372A1 (en) | 2011-10-01 |
| FI8789U1 (en) | 2010-07-21 |
| FIU20100158U0 (en) | 2010-03-30 |
| SE535114C2 (en) | 2012-04-17 |
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