CN105262551A - Wireless signal tester calibration device and method, and automatic testing system and method - Google Patents
Wireless signal tester calibration device and method, and automatic testing system and method Download PDFInfo
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- CN105262551A CN105262551A CN201510829602.2A CN201510829602A CN105262551A CN 105262551 A CN105262551 A CN 105262551A CN 201510829602 A CN201510829602 A CN 201510829602A CN 105262551 A CN105262551 A CN 105262551A
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Abstract
The invention provides a wireless signal tester calibration device and a method. A frequency meter is used for calibration of an output frequency of output signals of the wireless signal tester; a microwave power meter is used for calibration of output power of output signals of the wireless signal tester; a vector signal analyzer is used for EVM calibration of output signals of the wireless signal tester; a vector signal transmitter and the microwave power meter are used for calibration of power measurement of the wireless signal tester; the vector signal transmitter and the vector signal analyzer are used for calibration of EVM measurement of the wireless signal tester; and thus, reliability of performance test on the corresponding wireless transmitting and receiving equipment by using the wireless signal tester can be ensured. The invention also provides an automatic testing system and a method. The calibration device of the invention can be used for carrying out automatic calibration on the wireless signal tester, and the wireless signal tester after calibration is used for automatically testing to-be-tested wireless equipment.
Description
Technical field
The present invention relates to wireless signal measurement technical field, particularly relate to a kind of calibrating installation of wireless signal measurement instrument and method and Auto-Test System and method.
Background technology
Along with the development of Internet of Things industry and the wireless technology such as RF radio frequency, wifi, BT (bluetooth), ZigBee, NFC (close contact) increasingly mature, the output of the wireless transmitting-receiving equipments such as ZigBee signal sending and receiving equipment will strengthen gradually.And due to the impact of the factors such as production selector type, variations in temperature, device assembling such as ZigBee signal sending and receiving equipment, even based on the same design of same platform, the product of different performance also may be there is.Therefore, the wireless signal measurement instrument such as ZigBee tester are in the research and development of these wireless transmitting-receiving equipments, produce, be widely used in test process, for some performance for wireless communications indexs of these wireless transmitting-receiving equipments of measurement and monitoring, ensure that the performance index that it communicates meet standard-required, as the radio transmission performance index test of Smart Home application ZigBee technology, the wireless transmission index of involved test mainly contains following: power output (OutputPower), frequency error (FerqErr), error vector magnitude (EVM), packet loss (PER), received signal strength (RSSI) etc.Wireless signal measurement instrument includes signal projector and signal receiver usually, the wireless signal of the test for wireless transmitting-receiving equipments launched by reflector, receiver is for measuring the performance index of the wireless signal launched of decoding after described wireless transmitting-receiving equipments receives described wireless signal, therefore, the frequency of self output signal of wireless signal measurement instrument, power, EVM whether power accurately and reliably and to received signal and EVM etc. measurement result whether accurately and reliably, the performance test for wireless transmitting-receiving equipments will seem extremely important.Up to the present, country does not promulgate wireless signal measurement instrument calibrating standard or vertification regulation, and the impact whether existing operating personnel bring measurement result in the calibration using wireless signal measurement instrument also to reckon without wireless signal measurement instrument, thus cause measurement result inaccurate, or same product measurement result is inconsistent, and it is low to measure efficiency.
Summary of the invention
A kind of calibrating installation of wireless signal measurement instrument and method is the object of the present invention is to provide to calibrate for the performance index that output signal this wireless signal measurement instrument self and measurement performance index to received signal, to ensure that this wireless signal measurement instrument is to the reliability of the performance test of corresponding wireless transmitting-receiving equipments.
Another object of the present invention is to provide a kind of Auto-Test System for wireless device and method, can before wireless signal measurement instrument carries out wireless performance test to wireless device, this wireless signal measurement instrument is calibrated, to ensure that this wireless signal measurement instrument is to the reliability of the performance test of corresponding wireless transmitting-receiving equipments.
For solving the problem, the present invention proposes a kind of calibrating installation of wireless signal measurement instrument, comprising:
Connect the frequency meter of the transmitting terminal of described wireless signal measurement instrument, for reading the actual frequency of the output signal of described wireless signal measurement instrument, to demarcate the frequency error of the output signal of described wireless signal measurement instrument;
Connect the microwave power meter of the transmitting terminal of described wireless signal measurement instrument, for measuring the actual power of the continuous wave signal that described wireless signal measurement instrument exports, to demarcate the power error of the continuous wave signal that described wireless signal measurement instrument exports;
Connect the VSA of the transmitting terminal of described wireless signal measurement instrument, for measuring the EVM of the output signal of described wireless signal measurement instrument, to demarcate the EVM error of the output signal of described wireless signal measurement instrument; And
Vector signal generator, its output connects the receiving terminal of described wireless signal measurement instrument and described microwave power meter simultaneously, for exporting identical signal to described wireless signal measurement instrument and described microwave power meter, to utilize the performance number of described microwave power meter, demarcate the power measurement error of described wireless signal measurement instrument; Or its output connects the receiving terminal of described wireless signal measurement instrument and described VSA simultaneously, for exporting identical signal to described wireless signal measurement instrument and described VSA, to utilize the EVM value of described VSA, demarcate the EVM measure error of described wireless signal measurement instrument.
Further, the wireless signal that described wireless signal measurement instrument can be received and dispatched is RF radiofrequency signal, wifi, Bluetooth signal, ZigBee signal or NFC signal.
Further, the output of described vector signal generator connected described wireless signal measurement instrument by power splitter simultaneously receiving terminal with described microwave power meter or be connected the receiving terminal of described wireless signal measurement instrument and described VSA simultaneously.
Further, described calibrating installation also comprises the gating switch be all connected with described frequency meter, microwave power meter, VSA and vector signal generator, for the electrical connection of fc-specific test FC passage between gating frequency meter, microwave power meter, VSA and vector signal generator and described wireless signal measurement instrument.
Further, described calibrating installation also comprises the controller be connected with described gating switch, described controller is used for sending gating command to gating switch, to control the electrical connection of fc-specific test FC passage between frequency meter, microwave power meter, VSA and vector signal generator and described wireless signal measurement instrument described in the automatic gating of described gating switch according to predetermined set information.
Further, described predetermined set information comprises calibration item and realizes the relevant device of described calibration item.
Further, described gating command comprises test channel ID.
Further, described controller also for after being strobed in the electrical connection of described fc-specific test FC passage, arranges the parameter value of the equipment that described wireless signal measurement instrument is electrically connected by described fc-specific test FC passage.
The present invention also provides a kind of calibration steps of wireless signal measurement instrument, adopt the calibrating installation of one of above-mentioned wireless signal measurement instrument to calibrate described wireless test instrument, described calibration steps comprises frequency calibration step, calibration of power step and EVM calibration steps to wireless signal measurement instrument output signal and to the power measurement calibration step of wireless signal measurement instrument and EVM Measurement and calibration step; Wherein,
Described frequency calibration step comprises: the output frequency arranging the output signal of the transmitting terminal of described wireless signal measurement instrument, and the power output setting this output signal be 0dBm, signal type is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described frequency meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described frequency meter; Set the gate time of described frequency meter, read the actual frequency numerical value that described frequency meter shows; The frequency error of the output signal of described wireless signal measurement instrument is demarcated according to the described output frequency of setting and the described actual frequency numerical value of reading;
Described calibration of power step comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type of setting output signal is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described microwave power meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described microwave power meter; Read the actual power numerical value that described microwave power meter shows; The power error of the output signal of described wireless signal measurement instrument is demarcated according to the described power output of setting and the described actual power numerical value of reading;
Described EVM calibration steps comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type arranging this output signal is modulation signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described VSA, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described VSA; The signal analysis type of described VSA, output level, triggering mode, trigger delay time and result length are set, and the signal center frequency setting described VSA is identical with the output frequency of the output signal of described wireless test instrument; Read the EVM value that described VSA records; The EVM error of the output signal of described wireless signal measurement instrument is demarcated according to the modulation accuracy of described modulation signal and the described EVM value of reading;
Described power measurement calibration step comprises: the output frequency arranging the output signal of described vector signal generator, and the signal type setting this output signal is continuous wave signal; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, microwave power meter, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of microwave power meter output setting; Regulate the output level of described vector signal generator to adjust the actual power value that described microwave power meter shows; The receive frequency arranging the receiving terminal of described wireless signal measurement instrument is identical with described output frequency, incoming level is more than or equal to described output level, reads the actual power value that described wireless signal measurement instrument is measured; The power measurement error of described wireless signal measurement instrument is demarcated according to the performance number in the actual power value on described microwave power meter and described wireless signal measurement instrument;
Described EVM Measurement and calibration step comprises: the output frequency and the power output that arrange the output signal of described vector signal generator, and the signal type setting this output signal is the modulation signal consistent with described wireless signal measurement instrument modulation standard; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, VSA, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of VSA output setting; Signal measurement type, reception frequency range, centre frequency, the expectation level of described wireless signal measurement instrument are set according to described output signal, the signal analysis type of VSA, incoming level, triggering mode, triggering level and result length are set simultaneously, and the signal center frequency setting described VSA is identical with the centre frequency of described wireless test instrument; Read the EVM value on described VSA and the EVM value on described wireless signal measurement instrument, and demarcate the EVM measure error of described wireless signal measurement instrument according to the EVM value on the EVM value on described VSA and described wireless signal measurement instrument.
Further, in described EVM Measurement and calibration step, while the output frequency and power output stating the output signal of vector signal generator is set, the speed of the output signal of described vector signal generator, filter type and the filter Alpha factor are also set.
Further, described calibrating installation also comprises the gating switch be all connected with described frequency meter, microwave power meter, VSA and vector signal generator, utilizes described gating switch to open corresponding test channel in described frequency calibration step, described calibration of power step, described EVM calibration steps, described power measurement calibration step and described EVM Measurement and calibration step respectively.
Further, described calibrating installation also comprises the controller be connected with described gating switch; Described controller generates gating command according to predetermined set information, and described gating command is sent to described gating switch; Described gating switch, according to described gating command, opens corresponding test channel in described frequency calibration step, described calibration of power step, described EVM calibration steps, described power measurement calibration step and described EVM Measurement and calibration step automatically.
The present invention also provides a kind of Auto-Test System, for carrying out wireless performance test to wireless device to be measured, it is characterized in that: comprise wireless signal measurement instrument and testing system platform, described wireless device to be measured and the wireless connections of described wireless signal measurement instrument, described wireless signal measurement instrument is electrically connected with described testing system platform, described wireless signal measurement instrument is used for testing the transmitting of the wireless signal of described wireless device to be measured and/or receptivity, described testing system platform is used for calibrating described wireless signal measurement instrument and controlling described wireless signal measurement instrument automatically testing described wireless device to be measured, described testing system platform comprises calibrating installation and the power supply of one of above-mentioned wireless signal measurement instrument, master controller, memory, display and board assembly, described calibrating installation, power supply, master controller, memory and display are all fixed on described board assembly, described power supply is used for described calibrating installation, master controller, memory and monitor power supply, described calibrating installation, memory and display are all electrically connected described master controller and are controlled by described master controller, described memory controls the historical results of project profile that described calibrating installation calibrates described wireless signal measurement instrument and the calibration of described calibrating installation for depositing, also for depositing the historical results controlling project profile that described wireless signal measurement instrument tests wireless device to be measured and the test of described wireless signal measurement instrument.
Further, described project profile of carrying out calibrating comprises calibration item and calibration environment configuration parameter corresponding to calibration item, described calibration item comprises the frequency calibration to described wireless signal measurement instrument output signal, the calibration of power and EVM calibration and to the power measurement calibration of described wireless signal measurement instrument and EVM Measurement and calibration, described calibration environment configuration parameter comprises the emission state of wireless signal measurement instrument, accepting state, signal type, signal measurement type, centre frequency, output frequency, power output, receive frequency range, expect level, the signal analysis type of described VSA, output level, triggering mode, trigger delay time, result length, and the signal type of described vector signal generator, output frequency, power output, output level, centre frequency.
Further, described project profile of carrying out testing comprises test event and test environment configuration parameter, the emission state that described test event comprises wireless device to be measured is to accepting state change-over time, accepting state to emission state change-over time, vector amplitude error, centre frequency error, transmitting power, maximum input level, receiving sensitivity, link quality information.
The present invention also provides a kind of automatic test approach utilizing one of above-mentioned Auto-Test System, comprises the automatic calibration step of wireless signal measurement instrument and carries out automatic testing procedure to a wireless device to be measured; Wherein
Described automatic calibration step comprises: described master controller loads the project profile deposited in for calibrating described wireless signal measurement instrument in described memory, imports in testing system platform by the calibration item of described wireless signal measurement instrument and calibration environment configuration parameter; Frequency meter, microwave power meter, VSA and vector signal generator in the described calibrating installation of automatic control set up corresponding test channel between described wireless signal measurement instrument, and automatically complete frequency calibration to described wireless signal measurement instrument output signal, the calibration of power and EVM calibration according to the project profile of carrying out calibrating described in loading and to the power measurement calibration of described wireless signal measurement instrument and EVM Measurement and calibration; Read corresponding calibration result, and display in real time and preservation calibration result; Described wireless signal measurement instrument is adjusted to standard state according to calibration result;
Described automatic testing procedure comprises: load and deposit in for the project profile that described wireless signal measurement instrument is tested wireless device to be measured in testing system platform built-in storage, imports in testing system platform by the test event of wireless device to be measured and test environment configuration parameter; Wireless signal measurement instrument and the described wireless device to be measured of automatic control criterion state carry out radio communication; And the project profile of automatically carrying out testing according to loading completes the test to described wireless device nominative testing project to be measured; Read corresponding test result, and display in real time and preservation test result.
Compared with prior art, technical scheme of the present invention has following beneficial effect:
1, the calibrating installation of wireless signal measurement instrument of the present invention, the output frequency utilizing frequency meter can output signal wireless signal measurement instrument is calibrated; The power output calibration utilizing microwave power meter can output signal wireless signal measurement instrument; The EVM calibration utilizing VSA can output signal wireless signal measurement instrument; Utilize vector signal reflector and microwave power meter can calibrate the power measurement of wireless signal measurement instrument; Utilize vector signal reflector and VSA can calibrate the EVM measurement of wireless signal measurement instrument, thus ensure that the reliability utilizing this wireless signal measurement instrument corresponding wireless transmitting-receiving equipments to be carried out to performance test.Further, calibrating installation of the present invention can also comprise gating switch and controller, control gating switch by controller and realize the automatic gating of test channel and automatically carrying out of calibration item, achieve the Full-automatic calibration of wireless signal measurement instrument, the calibration of the wireless signal measurement instrument equipment such as RF radio frequency testing instrument, bluetooth tester, ZigBee tester and NFC tester can be widely used in.
2, the calibration steps of wireless signal measurement instrument of the present invention, by arranging output and the receiving parameter of wireless signal measurement instrument, frequency meter is set respectively simultaneously, microwave power meter, the parameter of VSA and vector signal generator and be communicated with frequency meter respectively, microwave power meter, VSA and the test channel between vector signal generator and wireless signal measurement instrument, achieve the output frequency calibration to wireless signal measurement instrument output signal, power output is calibrated, EVM calibration and to the power measurement calibration of wireless signal measurement instrument and EVM Measurement and calibration, ensure that the reliability utilizing this wireless signal measurement instrument corresponding wireless transmitting-receiving equipments to be carried out to performance test, further, control gating switch by controller and realize the automatic gating of test channel and automatically carrying out of calibration item, achieve the Full-automatic calibration of wireless signal measurement instrument, save testing time and manpower greatly.
3, Auto-Test System of the present invention and method, memory is utilized to store for the project profile of calibrating wireless signal tester and the project profile for testing wireless device to be measured, the project profile simultaneously utilizing master controller first to load calibration completes automatic calibration process to wireless signal measurement instrument to control calibrating installation, the project profile reloading test completes automatic test to wireless device to be measured to control wireless signal measurement instrument, thus ensure that and utilize this wireless signal measurement instrument to carry out accuracy and the reliability of performance test to corresponding wireless transmitting-receiving equipments.
Accompanying drawing explanation
Fig. 1 is the structural representation of the calibrating installation of the wireless signal measurement instrument of one embodiment of the invention;
Equivalent measuring schematic diagram when Fig. 2 A is the frequency calibration of one embodiment of the invention;
Wiring schematic diagram such as grade when Fig. 2 B is the calibration of power of one embodiment of the invention;
Equivalent measuring schematic diagram when Fig. 2 C is the EVM calibration of one embodiment of the invention;
Fig. 2 D is the wiring schematic diagram of the power measurement calibration of one embodiment of the invention;
Fig. 2 E is the wiring schematic diagram of the EVM Measurement and calibration of one embodiment of the invention;
Fig. 3 is the structural representation of the calibrating installation of the wireless signal measurement instrument of another embodiment of the present invention;
Fig. 4 is the structural representation of the calibrating installation of the wireless signal measurement instrument of further embodiment of this invention;
Fig. 5 is the structural representation of the Auto-Test System of one embodiment of the invention.
Embodiment
For making object of the present invention, feature becomes apparent, and be further described, but the present invention can realize by different forms, should just not be confined to described embodiment below in conjunction with accompanying drawing to the specific embodiment of the present invention.
Please refer to Fig. 1, the present embodiment proposes a kind of calibrating installation 2 of wireless signal measurement instrument, comprising: frequency meter 21, microwave power meter 22, VSA 23 and vector signal generator 24.Wherein, the frequency calibration of frequency meter 21 for outputing signal wireless signal measurement instrument 1, frequency meter 21 connects the transmitting terminal 11 of described wireless signal measurement instrument 1, for reading the actual frequency of the output signal of described wireless signal measurement instrument 1, to demarcate the frequency error of the output signal of described wireless signal measurement instrument 1; Microwave power meter 22 is for the calibration of power that outputs signal wireless signal measurement instrument 1 and coordinate vector signal generator 24 pairs of wireless signal measurement instrument 1 to carry out power measurement calibration, during the calibration of power, microwave power meter 22 connects the transmitting terminal 11 of described wireless signal measurement instrument 1, measure the actual power of the continuous wave signal that described wireless signal measurement instrument exports, to demarcate the power error of the continuous wave signal that described wireless signal measurement instrument exports; VSA 23 is for carrying out EVM Measurement and calibration to the EVM calibration outputed signal wireless signal measurement instrument 1 and cooperation vector signal generator 24 pairs of wireless signal measurement instrument 1, during EVM calibration, VSA 23 connects the transmitting terminal 11 of described wireless signal measurement instrument 1, for measuring the EVM of the output signal of described wireless signal measurement instrument 1, to demarcate the EVM error of the output signal of described wireless signal measurement instrument 1; Vector signal generator 24, its output connects receiving terminal 12 and the described microwave power meter 22 of described wireless signal measurement instrument 1 simultaneously, for exporting identical signal to described wireless signal measurement instrument 1 and described microwave power meter 22, to utilize the performance number of described microwave power meter 22, demarcate the power measurement error of described wireless signal measurement instrument 1; Or its output connects receiving terminal 12 and the described VSA 23 of described wireless signal measurement instrument 1 simultaneously, for exporting identical signal to described wireless signal measurement instrument 13 and described VSA 23, to utilize the EVM value of described VSA 23, demarcate the EVM measure error of described wireless signal measurement instrument 1.
It should be noted that, the wireless signal that the wireless signal measurement instrument 1 in the present embodiment can be received and dispatched can be RF radiofrequency signal, wifi, Bluetooth signal, ZigBee signal or NFC signal.Frequency meter 21, microwave power meter 22, VSA 23 and vector signal generator 24 can be independently hardware products, also can be the functional modules that can play frequency meter, microwave power meter, VSA and vector signal generator function.
Please refer to Fig. 2 A to 2E, the present embodiment also provides a kind of calibration steps of wireless signal measurement instrument, adopt the calibrating installation of one of above-mentioned wireless signal measurement instrument to calibrate described wireless test instrument, described calibration steps comprises frequency calibration step, calibration of power step and EVM calibration steps to wireless signal measurement instrument output signal and to the power measurement calibration step of wireless signal measurement instrument and EVM Measurement and calibration step; Wherein, described frequency calibration step comprises: the output frequency arranging the output signal of the transmitting terminal of described wireless signal measurement instrument, and the power output setting this output signal be 0dBm, signal type is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described frequency meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described frequency meter; Set the gate time of described frequency meter, read the actual frequency numerical value that described frequency meter shows; The frequency error of the output signal of described wireless signal measurement instrument is demarcated according to the described output frequency of setting and the described actual frequency numerical value of reading;
Described calibration of power step comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type of setting output signal is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described microwave power meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described microwave power meter; Read the actual power numerical value that described microwave power meter shows; The power error of the output signal of described wireless signal measurement instrument is demarcated according to the described power output of setting and the described actual power numerical value of reading;
Described EVM calibration steps comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type arranging this output signal is modulation signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described VSA, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described VSA; The signal analysis type of described VSA, output level, triggering mode, trigger delay time and result length are set, and the signal center frequency setting described VSA is identical with the output frequency of the output signal of described wireless test instrument; Read the EVM value that described VSA records; The EVM error of the output signal of described wireless signal measurement instrument is demarcated according to the modulation accuracy of described modulation signal and the described EVM value of reading;
Described power measurement calibration step comprises: the output frequency arranging the output signal of described vector signal generator, and the signal type setting this output signal is continuous wave signal; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, microwave power meter, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of microwave power meter output setting; Regulate the output level of described vector signal generator to adjust the actual power value that described microwave power meter shows; The receive frequency arranging the receiving terminal of described wireless signal measurement instrument is identical with described output frequency, incoming level is more than or equal to described output level, reads the actual power value that described wireless signal measurement instrument is measured; The power measurement error of described wireless signal measurement instrument is demarcated according to the performance number in the actual power value on described microwave power meter and described wireless signal measurement instrument;
Described EVM Measurement and calibration step comprises: the output frequency and the power output that arrange the output signal of described vector signal generator, and the signal type setting this output signal is the modulation signal consistent with described wireless signal measurement instrument modulation standard; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, VSA, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of VSA output setting; Signal measurement type, reception frequency range, centre frequency, the expectation level of described wireless signal measurement instrument are set according to described output signal, the signal analysis type of VSA, incoming level, triggering mode, triggering level and result length are set simultaneously, and the signal center frequency setting described VSA is identical with the centre frequency of described wireless test instrument; Read the EVM value on described VSA and the EVM value on described wireless signal measurement instrument, and demarcate the EVM measure error of described wireless signal measurement instrument according to the EVM value on the EVM value on described VSA and described wireless signal measurement instrument.
Below for the calibrating installation of ZigBee tester, composition graphs 2A to 2E describes the calibration steps of the present embodiment in detail.
Please refer to Fig. 2 A, equivalent measuring schematic diagram when Fig. 2 A is the frequency calibration outputed signal ZigBee tester 10, the i.e. input of the transmitting terminal 110 rate of connections meter 21 of ZigBee tester 10.When carrying out frequency calibration, first the output frequency of ZigBee tester 10 is set, resetting its power output is 0dBm, signal type is continuous wave, then the output of ZigBee tester 10 is opened, the gate time of setpoint frequency meter 21, now ZigBee tester 10 is opened with the test channel of frequency meter 21, the transmitting terminal 110 of ZigBee tester 10 exports the continuous wave signal of setting to frequency meter 21, frequency meter 21 can measure the output frequency of the continuous wave signal that ZigBee tester 10 exports, the frequency values of reading frequency meter 21, this is the actual frequency values of the output signal of ZigBee tester 10, utilize this actual frequency numerical value can demarcate the frequency error (uncertainty namely in table one) of the output signal of described ZigBee tester, the calibration of the different output frequencies of ZigBee tester 10 has come by repeating said process, as shown in Table 1:
Table one, frequency calibration result example
| Frequency setting value/nominal value (MHz) | Measured value (MHz) | Uncertainty |
| 2405 | 2404.9997 | Urel＝1×10 -6(k＝2) |
| 2450 | 2449.9997 | Urel＝1×10 -6(k＝2) |
| 2480 | 2479.9997 | Urel＝1×10 -6(k＝2) |
Please refer to Fig. 2 B, equivalent measuring schematic diagram when Fig. 2 B is the calibration of power outputed signal ZigBee tester 10, namely the transmitting terminal 110 of ZigBee tester 10 connects the input of microwave power meter 22.When carrying out the calibration of power, the output frequency of setting ZigBee tester 10 and power output, signal type is continuous wave, open the output of ZigBee tester 10 and correctly set microwave power meter 22, now ZigBee tester 10 is opened with the test channel of microwave power meter 22, the transmitting terminal 110 of ZigBee tester 10 exports the continuous wave signal of setting to microwave power meter 22, microwave power meter 22 can measure the power output of the continuous wave signal that ZigBee tester 10 exports, now read the magnitude of power of display on microwave power meter 22, this is the actual power value that ZigBee tester 10 exports continuous wave signal, utilize this actual power value can demarcate the power error (uncertainty namely in table two) of the output signal of ZigBee tester 10, the calibration of the different output power under the different output frequencies of ZigBee tester 10 has come by repeating said process, as shown in Table 2:
Table two, power calibration results example
Please refer to Fig. 2 C, equivalent measuring schematic diagram when Fig. 2 C is the EVM calibration outputed signal ZigBee tester 10, the i.e. input of the transmitting terminal 110 connected vector signal analyzer 23 of ZigBee tester 10.When carrying out EVM calibration, first the output frequency of ZigBee tester 10 is set, and setpoint power output is-10dBm, output signal is ZigBee modulation signal, VSA 23 selects ZigBee to analyze, the centre frequency of setting VSA 23 is identical with the output frequency of ZigBee tester 10, output level is-5dBm, triggering mode is IFmag, result length is 500, trigger delay is-100 μ s, then the output of ZigBee tester 10 is opened, now ZigBee tester 10 is opened with the test channel of VSA 23, the transmitting terminal 110 of ZigBee tester 10 exports the ZigBee modulation signal of setting to VSA 23, VSA 23 can measure the EVM value of the ZigBee modulation signal that ZigBee tester 10 exports, now read the EVM numerical value of display on VSA 23, namely ZigBee tester 10 exports the actual EVM magnitude value of ZigBee modulation signal, utilize this actual EVM magnitude value can demarcate the EVM error (uncertainty namely in table three) of the output signal of ZigBee tester 10, ZigBee modulation signal EVM under the different output frequencies of ZigBee tester 10 calibrates and has come by repeating said process, as shown in Table 3:
Table three, EVM calibration result example
| Frequency (MHz) | Error Vector Magnitude EVM | Uncertainty |
| 2405 | 0.5％ | U rel＝0.7％(k＝2) |
| 2450 | 0.5％ | U rel＝0.7％(k＝2) |
| 2480 | 0.5％ | U rel＝0.7％(k＝2) |
Please refer to Fig. 2 D, Fig. 2 D is equivalent measuring schematic diagram when carrying out power measurement calibration to ZigBee tester 10, and namely the receiving terminal 120 of ZigBee tester 10 and microwave power meter 22 are by the output of power splitter 25 connected vector signal generator 24 simultaneously.When carrying out power measurement calibration, first set vector signal generator 24 and export continuous wave signal, output frequency is set as f, open the test channel between the receiving terminal 120 of vector signal generator 24 and ZigBee tester 10, microwave power meter 22, vector signal generator 24 is the continuous wave signal of f to ZigBee tester 10 and microwave power meter 22 output frequency, then regulate the output level of vector signal generator 24, make the power instruction value of microwave power meter 22 be Ps, then, power measurement selected by ZigBee tester 10, arranging receive frequency is f, incoming level is greater than or equal to Ps, now ZigBee tester 10 can measure the power measured value of the continuous wave of reception, readout power measured value from ZigBee tester 10, compare with the power instruction value (i.e. standard value) of microwave power meter 22, to demarcate the error (uncertainty namely in table four) of ZigBee tester 10 power measurement to received signal, ZigBee tester 10 has come by repeating said process the power measurement calibration of the output signal of the different output power under different output frequency, as shown in Table 4:
Table four, power measurement calibration result example
Please refer to Fig. 2 E, Fig. 2 E is equivalent measuring schematic diagram when carrying out EVM Measurement and calibration to ZigBee tester 10, and namely the receiving terminal 120 of ZigBee tester 10 and the input of VSA 23 are by the output of power splitter 26 connected vector signal generator 24 simultaneously.When carrying out EVM Measurement and calibration, first set vector signal generator 24 and export the modulation type ZigBee modulation signal consistent with the modulation standard of ZigBee tester 10, namely the modulation type of the output signal of vector signal generator 24 is set as O-QPSK, and the speed simultaneously setting this output signal is 1Mkbit/s, filter type Halfsine, the filter Alpha factor are 0.35, output frequency is f, power output is Ps (being such as-10dBm), then select ZigBee tester 10 for modulation parameter measurement, VSA 23 is selected to be ZigBee signal measurement, open the test channel between the receiving terminal 120 of vector signal generator 24 and ZigBee tester 10, VSA 23, vector signal generator 24 is the modulation signal of f to ZigBee tester 10 and VSA 23 output frequency, then the centre frequency setting VSA 23 is f, incoming level range is that Ps is (namely identical with the power output of the output signal of vector signal generator 24, such as be-10dBm), result length is 400, triggering mode is that IF triggers, triggering level is 5mV, read the EVM value that VSA 23 records, this i.e. standard value, the modulation of opening ZigBee tester 10 is measured, ZigBee frequency range is 2.45GHz, setting centre frequency is f, setting expects that level is that Ps is (namely identical with the power output of the output signal of vector signal generator 24, such as be-10dBm), read the EVM value that ZigBee tester 10 records, the EVM value of VSA 23 is standard value, the EVM indicated value of ZigBee tester 10 is measured value, the EVM measure error (uncertainty namely in table five) of ZigBee tester 10 is demarcated according to the standard value of EVM value and measured value, ZigBee tester 10 has come by repeating said process the EVM Measurement and calibration of the output signal under different output frequency, as shown in Table 5:
Table five, EVM Measurement and calibration result example
| Frequency (MHz) | EVM standard value | EVM indicated value | Uncertainty |
| 2405 | 0.7％ | 0.8％ | U＝0.7％(k＝2) |
| 2450 | 0.7％ | 0.8％ | U＝0.7％(k＝2) |
| 2480 | 0.7％ | 0.8％ | U＝0.7％(k＝2) |
From the above mentioned, the calibrating installation of the wireless signal measurement instrument of the present embodiment and calibration steps, corresponding output frequency calibration, power output calibration and output signal EVM calibration can be carried out to the wireless signal measurement instrument of access, can also calibrate the power measurement of the wireless signal measurement instrument of access and EVM measurement, thus ensure that wireless signal measurement instrument is to the accuracy of the performance test of corresponding wireless device and reliability.
Please refer to Fig. 3, in other embodiments of the invention, calibrating installation 1 is except frequency meter 21, microwave power meter 22, outside the assemblies such as VSA 23 and vector signal generator 24, also comprise and described frequency meter 21, microwave power meter 22, the gating switch 27 that VSA 23 and vector signal generator 24 all connect, this gating switch 27 may be used for gating frequency meter 21, microwave power meter 22, VSA 23 and the electrical connection of fc-specific test FC passage between vector signal generator 24 and wireless signal measurement instrument 1, compared with above-described embodiment, in the method that the calibrating installation applying this embodiment is calibrated wireless signal measurement instrument 1, when implementing different calibration items to wireless signal measurement instrument 1, without the need to dismantling wireless signal measurement instrument 1 and the frequency meter 21 in calibrating installation 2, microwave power meter 22, the line of VSA 23 and vector signal generator 24, can automatically switch in the connected mode of corresponding calibration item, handled easily.
Please refer to Fig. 4, in other embodiments of the invention, calibrating installation 1 except gating switch 27 and connect frequency meter 21, microwave power meter 22, outside the assemblies such as VSA 23 and vector signal generator 24, also comprise the controller 28 be connected with gating switch 27, controller 28 is for sending gating command to gating switch 27 according to predetermined set information, to control described gating switch 27 frequency meter 21 described in gating automatically, microwave power meter 22, VSA 23 and the electrical connection of fc-specific test FC passage between vector signal generator 24 and described wireless signal measurement instrument 1.Wherein, described predetermined set information comprises calibration item and realizes the relevant device of described calibration item, described gating command comprises test channel ID, controller 28 is also for after being strobed in the electrical connection of described fc-specific test FC passage, the parameter value of the component devices in the calibrating installation 2 that wireless signal measurement instrument 1 is electrically connected by described fc-specific test FC passage is set, namely frequency meter 21, microwave power meter 22, VSA 23 and vector signal generator 24 can be set for the parameter value of calibration item or project profile.Compared with above-described embodiment, in the method that the calibrating installation applying this embodiment is calibrated wireless signal measurement instrument 1, when implementing different calibration items to wireless signal measurement instrument 1, without the need to dismantling wireless signal measurement instrument 1 and the frequency meter 21 in calibrating installation 2, microwave power meter 22, the line of VSA 23 and vector signal generator 24, also mode is conducted without the need to manual switchover gating switch 27, can automatically switch in the test channel of corresponding calibration item, handled easily, automatically the calibration process of wireless signal measurement instrument 1 can be completed.
Please refer to Fig. 5, the present invention also provides a kind of Auto-Test System, for automatically testing the wireless performance of wireless device to be measured, this Auto-Test System comprises wireless signal measurement instrument and testing system platform, described wireless device to be measured 3 and the wireless connections of described wireless signal measurement instrument 1, described wireless signal measurement instrument 1 is electrically connected with described testing system platform 4, such as testing system platform 4 is communicated to connect by gpib bus telecommunication cable and wireless signal measurement instrument 1, or communicated to connect by network cable and wireless signal measurement instrument 1, or simultaneously by gpib bus telecommunication cable, network cable and wireless signal measurement instrument 1 communicate to connect.
Wireless signal measurement instrument 1 is tested for the transmitting of the wireless signal to described wireless device 3 to be measured and/or receptivity, "and/or" represents: when described wireless device 3 to be measured is for wireless transmitting device, wireless signal measurement instrument 1 can be tested the performance of this wireless device 3 wireless signal emission to be measured; When described wireless device 3 to be measured is radio receiver, wireless signal measurement instrument 1 can be tested the performance that this wireless device 3 to be measured receives wireless signal; When described wireless device 3 to be measured is wireless transmitting-receiving equipments, wireless signal measurement instrument 1 can be tested the performance of the performance of this wireless device 3 wireless signal emission to be measured and reception wireless signal.
Testing system platform 4 is tested described wireless device 3 to be measured automatically for calibrating wireless signal measurement instrument 2 and controlling wireless signal measurement instrument 2.In the present embodiment, described testing system platform 4 comprises calibrating installation 2 and power supply 43, master controller 41, memory 42, display (not shown) and the board assembly (not shown) of Fig. 1, Fig. 3 or Fig. 4.Described calibrating installation 2, power supply 43, master controller 41, memory 42 and display are all fixed on described board assembly, described power supply 43 is for described calibrating installation 2, master controller 41, memory 42 and monitor power supply, described calibrating installation 2, memory 42 and display are all electrically connected described master controller 41 and are controlled by described master controller 41, calibrating installation 2, for calibrating wireless signal measurement instrument 1 under the control of master controller 41, comprises frequency meter 21, microwave power meter 22, VSA 23 and vector signal generator 24.Master controller 41 is for editing calibration item, test event, the basic parameter of wireless test instrument 1 and calibrating installation is set, and the project profile order of test and the project profile order of calibration are set, once the project profile order arranging test produces, the automatic test of wireless test instrument 1 to wireless device 3 to be measured is realized by according to the test event of configuration, and test result is shown to display, similarly, once the project profile order arranging calibration produces, the automatic calibration of calibrating installation 2 pairs of wireless test instrument 1 will be realized according to the calibration item of configuration, display is for showing calibration item information and measure the item information, and measure the item information comprises project name, test frequency, instrument transmitting power, measured value lower limit, measurement result, the measured value upper limit etc., calibration item information comprises the EVM error, the power measurement error of wireless test instrument 1, the EVM measure error of wireless test instrument 1 etc. of project name, measurement result, the frequency error of wireless test instrument 1, the output power error of wireless test instrument 1, the output signal of wireless test instrument 1.Described memory 42 controls project profile that described calibrating installation 2 calibrates described wireless signal measurement instrument 1 and the historical results that described calibrating installation 2 is calibrated for depositing, also for depositing the historical results controlling project profile that described wireless signal measurement instrument 1 tests each wireless device 3 to be measured and the test of described wireless signal measurement instrument 1.Wherein, described project profile of carrying out calibrating comprises calibration item and calibration environment configuration parameter corresponding to calibration item, described calibration item comprises the frequency calibration outputed signal described wireless signal measurement instrument 1, the calibration of power and EVM calibration and to the power measurement calibration of described wireless signal measurement instrument 1 and EVM Measurement and calibration, described calibration environment configuration parameter comprises the emission state of wireless signal measurement instrument 1, accepting state, signal type, signal measurement type, centre frequency, output frequency, power output, receive frequency range, expect level, the signal analysis type of the VSA 23 in calibrating installation 2, output level, triggering mode, trigger delay time, result length, and the signal type of vector signal generator 24 in calibrating installation 2, output frequency, power output, output level, centre frequency etc.Described project profile of carrying out testing comprises test event and test environment configuration parameter, the emission state that described test event comprises wireless device 3 to be measured is to accepting state change-over time, accepting state is to emission state change-over time, vector amplitude error, centre frequency error, transmitting power, maximum input level, receiving sensitivity, link quality information etc.
Please continue to refer to Fig. 5, and composition graphs 1, Fig. 3 or Fig. 4, the present invention also provides a kind of automatic test approach utilizing above-mentioned Auto-Test System, comprises the automatic calibration step of wireless signal measurement instrument 1 and carries out automatic testing procedure to a wireless device 3 to be measured; Wherein
Described automatic calibration step comprises: described master controller 41 loads the project profile deposited in for calibrating described wireless signal measurement instrument 1 in described memory 42, imports in testing system platform 4 by the calibration item of described wireless signal measurement instrument 1 and calibration environment configuration parameter; Master controller 41 automatically frequency meter 21, microwave power meter 22, VSA 23 and the vector signal generator 24 controlled in described calibrating installation 2 sets up corresponding test channel between described wireless signal measurement instrument 1, calibrating installation 2 automatically according to the project profile of carrying out calibrating described in loading complete described wireless signal measurement instrument 1 is outputed signal frequency calibration, the calibration of power and EVM calibration and to the power measurement calibration of described wireless signal measurement instrument 1 and EVM Measurement and calibration; Read corresponding calibration result, and display in real time and preservation calibration result; Described wireless signal measurement instrument 1 to standard state is adjusted according to calibration result;
Described automatic testing procedure comprises: master controller 41 loads to be deposited in for the project profile that described wireless signal measurement instrument 1 is tested wireless device 3 to be measured in testing system platform 4 built-in storage 42, imports in testing system platform 4 by the test event of wireless device 3 to be measured and test environment configuration parameter; The wireless signal measurement instrument 1 of the automatic control criterion state of master controller 41 carries out radio communication with described wireless device 3 to be measured; The project profile that wireless signal measurement instrument 1 carries out testing automatically according to loading completes the test to described wireless device 3 nominative testing project to be measured; Read corresponding test result, and display in real time and preservation test result.
It should be noted that, in other embodiments of the invention, Auto-Test System can a multiple wireless device to be measured of concurrent testing, and multiple wireless device to be measured only needs direct parallel join wireless signal measurement instrument or connect wireless signal measurement instrument by wireless parallel adapter to realize.
Above-mentioned Auto-Test System and method carry out automatic calibration to wireless signal measurement instrument, and wireless signal measurement instrument carries out wireless performance to corresponding wireless device to be measured and automatically tests after can utilizing calibration, easy to use, wireless device research and development and the progress of producing can be improved, without the need to artificial participation after Auto-Test System is formed, more human cost can be saved, checking for wireless device performance index provides good solution, be applicable to RF radio-frequency apparatus, wifi equipment, bluetooth equipment, ZigBee equipment, the research and development of the wireless devices such as NFC device, test and production.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (16)
1. a calibrating installation for wireless signal measurement instrument, is characterized in that, comprising:
Connect the frequency meter of the transmitting terminal of described wireless signal measurement instrument, for reading the actual frequency of the output signal of described wireless signal measurement instrument, to demarcate the frequency error of the output signal of described wireless signal measurement instrument;
Connect the microwave power meter of the transmitting terminal of described wireless signal measurement instrument, for measuring the actual power of the continuous wave signal that described wireless signal measurement instrument exports, to demarcate the power error of the continuous wave signal that described wireless signal measurement instrument exports;
Connect the VSA of the transmitting terminal of described wireless signal measurement instrument, for measuring the EVM of the output signal of described wireless signal measurement instrument, to demarcate the EVM error of the output signal of described wireless signal measurement instrument; And
Vector signal generator, its output connects the receiving terminal of described wireless signal measurement instrument and described microwave power meter simultaneously, for exporting identical signal to described wireless signal measurement instrument and described microwave power meter, to utilize the performance number of described microwave power meter, demarcate the power measurement error of described wireless signal measurement instrument; Or its output connects the receiving terminal of described wireless signal measurement instrument and described VSA simultaneously, for exporting identical signal to described wireless signal measurement instrument and described VSA, to utilize the EVM value of described VSA, demarcate the EVM measure error of described wireless signal measurement instrument.
2. the calibrating installation of wireless signal measurement instrument as claimed in claim 1, it is characterized in that, the wireless signal that described wireless signal measurement instrument can be received and dispatched is RF radiofrequency signal, wifi, Bluetooth signal, ZigBee signal or NFC signal.
3. the calibrating installation of wireless signal measurement instrument as claimed in claim 1, it is characterized in that, the output of described vector signal generator connects described wireless signal measurement instrument simultaneously receiving terminal by power splitter is with described microwave power meter or be connected the receiving terminal of described wireless signal measurement instrument and described VSA simultaneously.
4. the calibrating installation of wireless signal measurement instrument as claimed in claim 1, it is characterized in that, described calibrating installation also comprises the gating switch be all connected with described frequency meter, microwave power meter, VSA and vector signal generator, for the electrical connection of fc-specific test FC passage between gating frequency meter, microwave power meter, VSA and vector signal generator and described wireless signal measurement instrument.
5. the calibrating installation of wireless signal measurement instrument as claimed in claim 4, it is characterized in that, described calibrating installation also comprises the controller be connected with described gating switch, described controller is used for sending gating command to gating switch, to control the electrical connection of fc-specific test FC passage between frequency meter, microwave power meter, VSA and vector signal generator and described wireless signal measurement instrument described in the automatic gating of described gating switch according to predetermined set information.
6. the calibrating installation of wireless signal measurement instrument as claimed in claim 5, it is characterized in that, described predetermined set information comprises calibration item and realizes the relevant device of described calibration item.
7. the calibrating installation of wireless signal measurement instrument as claimed in claim 5, it is characterized in that, described gating command comprises test channel ID.
8. the calibrating installation of wireless signal measurement instrument as claimed in claim 5, it is characterized in that, described controller also for after being strobed in the electrical connection of described fc-specific test FC passage, arranges the parameter value of the equipment that described wireless signal measurement instrument is electrically connected by described fc-specific test FC passage.
9. the calibration steps of a wireless signal measurement instrument, it is characterized in that, adopt the calibrating installation of wireless signal measurement instrument according to any one of claim 1 to 8 to calibrate described wireless test instrument, described calibration steps comprises frequency calibration step, calibration of power step and EVM calibration steps to wireless signal measurement instrument output signal and to the power measurement calibration step of wireless signal measurement instrument and EVM Measurement and calibration step; Wherein,
Described frequency calibration step comprises: the output frequency arranging the output signal of the transmitting terminal of described wireless signal measurement instrument, and the power output setting this output signal be 0dBm, signal type is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described frequency meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described frequency meter; Set the gate time of described frequency meter, read the actual frequency numerical value that described frequency meter shows; The frequency error of the output signal of described wireless signal measurement instrument is demarcated according to the described output frequency of setting and the described actual frequency numerical value of reading;
Described calibration of power step comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type of setting output signal is continuous wave signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described microwave power meter, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described microwave power meter; Read the actual power numerical value that described microwave power meter shows; The power error of the output signal of described wireless signal measurement instrument is demarcated according to the described power output of setting and the described actual power numerical value of reading;
Described EVM calibration steps comprises: the output frequency and the power output that arrange the output signal of the transmitting terminal of described wireless signal measurement instrument, and the signal type arranging this output signal is modulation signal; Open the test channel between the transmitting terminal of described wireless signal measurement instrument and described VSA, the transmitting terminal of described wireless signal measurement instrument exports the described output signal arranged to described VSA; The signal analysis type of described VSA, output level, triggering mode, trigger delay time and result length are set, and the signal center frequency setting described VSA is identical with the output frequency of the output signal of described wireless test instrument; Read the EVM value that described VSA records; The EVM error of the output signal of described wireless signal measurement instrument is demarcated according to the modulation accuracy of described modulation signal and the described EVM value of reading;
Described power measurement calibration step comprises: the output frequency arranging the output signal of described vector signal generator, and the signal type setting this output signal is continuous wave signal; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, microwave power meter, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of microwave power meter output setting; Regulate the output level of described vector signal generator to adjust the actual power value that described microwave power meter shows; The receive frequency arranging the receiving terminal of described wireless signal measurement instrument is identical with described output frequency, incoming level is more than or equal to described output level, reads the actual power value that described wireless signal measurement instrument is measured; The power measurement error of described wireless signal measurement instrument is demarcated according to the performance number in the actual power value on described microwave power meter and described wireless signal measurement instrument;
Described EVM Measurement and calibration step comprises: the output frequency and the power output that arrange the output signal of described vector signal generator, and the signal type setting this output signal is the modulation signal consistent with described wireless signal measurement instrument modulation standard; Open the test channel between the receiving terminal of described vector signal generator and described wireless signal measurement instrument, VSA, the receiving terminal of described vector signal generator to described wireless signal measurement instrument and the described output signal of VSA output setting; Signal measurement type, reception frequency range, centre frequency, the expectation level of described wireless signal measurement instrument are set according to described output signal, the signal analysis type of VSA, incoming level, triggering mode, triggering level and result length are set simultaneously, and the signal center frequency setting described VSA is identical with the centre frequency of described wireless test instrument; Read the EVM value on described VSA and the EVM value on described wireless signal measurement instrument, and demarcate the EVM measure error of described wireless signal measurement instrument according to the EVM value on the EVM value on described VSA and described wireless signal measurement instrument.
10. calibration steps as claimed in claim 9, it is characterized in that, in described EVM Measurement and calibration step, while the output frequency and power output stating the output signal of vector signal generator is set, the speed of the output signal of described vector signal generator, filter type and the filter Alpha factor are also set.
11. calibration stepss as claimed in claim 9, it is characterized in that, described calibrating installation also comprises the gating switch be all connected with described frequency meter, microwave power meter, VSA and vector signal generator, utilizes described gating switch to open corresponding test channel in described frequency calibration step, described calibration of power step, described EVM calibration steps, described power measurement calibration step and described EVM Measurement and calibration step respectively.
12. calibration stepss as claimed in claim 11, it is characterized in that, described calibrating installation also comprises the controller be connected with described gating switch; Described controller generates gating command according to predetermined set information, and described gating command is sent to described gating switch; Described gating switch, according to described gating command, opens corresponding test channel in described frequency calibration step, described calibration of power step, described EVM calibration steps, described power measurement calibration step and described EVM Measurement and calibration step automatically.
13. 1 kinds of Auto-Test Systems, for carrying out wireless performance test to wireless device to be measured, it is characterized in that: comprise wireless signal measurement instrument and testing system platform, described wireless device to be measured and the wireless connections of described wireless signal measurement instrument, described wireless signal measurement instrument is electrically connected with described testing system platform, described wireless signal measurement instrument is used for testing the transmitting of the wireless signal of described wireless device to be measured and/or receptivity, described testing system platform is used for calibrating described wireless signal measurement instrument and controlling described wireless signal measurement instrument automatically testing described wireless device to be measured, described testing system platform comprises calibrating installation and the power supply of the wireless signal measurement instrument according to any one of claim 1 to 8, master controller, memory, display and board assembly, described calibrating installation, power supply, master controller, memory and display are all fixed on described board assembly, described power supply is used for described calibrating installation, master controller, memory and monitor power supply, described calibrating installation, memory and display are all electrically connected described master controller and are controlled by described master controller, described memory controls the historical results of project profile that described calibrating installation calibrates described wireless signal measurement instrument and the calibration of described calibrating installation for depositing, also for depositing the historical results controlling project profile that described wireless signal measurement instrument tests wireless device to be measured and the test of described wireless signal measurement instrument.
14. Auto-Test Systems as claimed in claim 13, it is characterized in that, described project profile of carrying out calibrating comprises calibration item and calibration environment configuration parameter corresponding to calibration item, described calibration item comprises the frequency calibration to described wireless signal measurement instrument output signal, the calibration of power and EVM calibration and to the power measurement calibration of described wireless signal measurement instrument and EVM Measurement and calibration, described calibration environment configuration parameter comprises the emission state of wireless signal measurement instrument, accepting state, signal type, signal measurement type, centre frequency, output frequency, power output, receive frequency range, expect level, the signal analysis type of described VSA, output level, triggering mode, trigger delay time, result length, and the signal type of described vector signal generator, output frequency, power output, output level, centre frequency.
15. Auto-Test Systems as claimed in claim 13, it is characterized in that, described project profile of carrying out testing comprises test event and test environment configuration parameter, and the emission state that described test event comprises wireless device to be measured is to accepting state change-over time, and accepting state is to emission state change-over time, vector amplitude error, centre frequency error, transmitting power, maximum input level, receiving sensitivity, link quality information.
16. 1 kinds of automatic test approach utilizing the Auto-Test System according to any one of claim 13 to 15, is characterized in that: comprise the automatic calibration step of wireless signal measurement instrument and carry out automatic testing procedure to a wireless device to be measured; Wherein
Described automatic calibration step comprises: described master controller loads the project profile deposited in for calibrating described wireless signal measurement instrument in described memory, imports in testing system platform by the calibration item of described wireless signal measurement instrument and calibration environment configuration parameter; Frequency meter, microwave power meter, VSA and vector signal generator in the described calibrating installation of automatic control set up corresponding test channel between described wireless signal measurement instrument, and automatically complete frequency calibration to described wireless signal measurement instrument output signal, the calibration of power and EVM calibration according to the project profile of carrying out calibrating described in loading and to the power measurement calibration of described wireless signal measurement instrument and EVM Measurement and calibration; Read corresponding calibration result, and display in real time and preservation calibration result; Described wireless signal measurement instrument is adjusted to standard state according to calibration result;
Described automatic testing procedure comprises: load and deposit in for the project profile that described wireless signal measurement instrument is tested wireless device to be measured in testing system platform built-in storage, imports in testing system platform by the test event of wireless device to be measured and test environment configuration parameter; Wireless signal measurement instrument and the described wireless device to be measured of automatic control criterion state carry out radio communication; And the project profile of automatically carrying out testing according to loading completes the test to described wireless device nominative testing project to be measured; Read corresponding test result, and display in real time and preservation test result.
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