CN101997620B - Device and method for providing test signals - Google Patents
Device and method for providing test signals Download PDFInfo
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Abstract
The embodiment of the invention discloses a device and a method for providing test signals. The device comprises a first frequency conversion unit, a second frequency conversion unit and a line matching unit. The first frequency conversion unit is used for converting radio frequency signals output by a tested wireless product into intermediate-frequency signals; the second frequency conversion unit is used for converting the intermediate-frequency signals into high-frequency signals according to a preset frequency, wherein the frequency of the high-frequency signals is the preset frequency; and the line matching unit is used for regulating impedance of a transmission line according to the frequency of the high-frequency signals and outputting the high-frequency signals as test signals. In the technical scheme, as the frequency of signals output by the wireless product is converted twice, the signal after final frequency conversion is the reception signal at the input end of the wireless product to replace vector signal sources and test the reception sensitivity, gain, band fluctuation, and the like of the wireless product. The device for providing test signals is simple, easy and low in cost.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method that the device of test signal is provided and test signal is provided.
Background technology
Along with the continuous lifting of wireless domain technology, the popularity rate of global radio network is also more and more higher.In the ever-increasing while of wireless network demand, wireless carriers is also more and more to the demand of wireless device, make that wireless product manufacturer needs more and more, more accurate instrument tests and keep in repair wireless product, as: comprehensive tester, spectrum analyzer, vector signal generator, power meter etc.
A kind of general method of existing test wireless product is: adopt the up input of vector signal source as tested single board, tested wireless product receives after up input signal, can test out the parameter relevant to up input signal, as receiving sensitivity, gain, passband fluctuation etc.; Or, for the downstream signal of tested wireless product output, can measure the downstream signal of output with spectrum analyzer, by spectrum analyzer, more Vector Messages of the downstream signal of tested wireless product output are shown to tester.
In the research and practice process to prior art, the present inventor finds, the signal source instrument, the spectrum analyzer etc. that are used for testing wireless product are all very expensive, each instrument cost easily will up to ten thousand yuans, and instrument volume is large, not Easy Move and carrying, is unfavorable for whenever and wherever possible wireless product being tested.
Summary of the invention
The embodiment of the present invention provides a kind of method that the device of test signal is provided and test signal is provided, and can test test signal is provided for wireless product by substitution signal source instrument.
The embodiment of the present invention provides a kind of device that test signal is provided, and comprising: the first converter unit, the second converter unit and line matching unit;
Described the first converter unit, for being converted to intermediate-freuqncy signal by the radiofrequency signal of tested wireless product output;
Described the second converter unit, for according to preset frequency, described intermediate-freuqncy signal being converted to high-frequency signal, the frequency of described high-frequency signal is described preset frequency;
Described line matching unit, for adjust the impedance of transmission line according to the frequency of described high-frequency signal, then exports described high-frequency signal as test signal.
The embodiment of the present invention also provides a kind of method that test signal is provided, and comprising:
The radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
According to preset frequency, described intermediate-freuqncy signal is converted to high-frequency signal, the frequency of described high-frequency signal is described preset frequency;
Adjust the impedance of transmission line according to the frequency of described high-frequency signal, described high-frequency signal is exported as test signal.
The embodiment of the present invention adopts carries out double conversion to the signal of wireless product output, the signal that makes final frequency conversion is the reception signal of this wireless product input, therefore, this provides the device of test signal can replace vector signal source, carry out the tests such as receiving sensitivity, gain and the passband fluctuation of wireless product, this provides the device of test signal to be simple and easy to use, with low cost.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the functional unit schematic diagram of a kind of device that test signal is provided that the present embodiment one provides;
Fig. 2 is the simple circuit figure of radio frequency part in a kind of device that test signal is provided that the present embodiment one provides;
Fig. 3 be the tone signal source unit that provides of the present embodiment two with main collection radio-frequency line and the diversity radio-frequency line of tested wireless product between radio frequency be connected simplified schematic diagram;
Fig. 4 is a kind of display interface of the device to test result that test signal is provided that provides of the present embodiment two;
Fig. 5 is a kind of method simplified schematic diagram that test signal is provided that the present embodiment three provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-,
The present embodiment provides a kind of device that test signal is provided.
Before the embodiment of the present invention is explained, first, it should be noted that; in the time that wireless product is tested; conventionally can measure receiving sensitivity, gain, passband fluctuation of this wireless product etc., wherein, receiving sensitivity represents that receiver receives required minimum power input.In the time that wireless product receives input power and is less than minimum power input, this wireless product cannot parse the signal of input.Conventionally provide test signal to wireless product by signal source instrument, as the up input signal of wireless product, test out receiving sensitivity, gain, passband fluctuation etc. by wireless product and measure.A kind of device that test signal is provided is provided in embodiments of the present invention, can substitution signal source instrument, provide test signal to wireless product, thereby carry out the tests such as the sensitivity, gain, passband fluctuation of wireless product.
As shown in Figure 1, this provides the device of test signal to comprise: the first converter unit 100, the second converter units 110, and line matching unit 120.In Fig. 1, the direction indication of arrow enters the flow direction of the signal in this device that test signal is provided.
Wherein, wireless product output radiofrequency signal, is transferred to the first converter unit 100 that the device of test signal is provided by radio-frequency line, by the first converter unit 100, radiofrequency signal is converted to intermediate-freuqncy signal.Because radiofrequency signal is difficult for processing, therefore, by the first converter unit 100, radiofrequency signal is converted into intermediate-freuqncy signal.The concrete frequency of this intermediate-freuqncy signal needs according to actual design and preset.The specific implementation of the first converter unit 100 can be realized by a local oscillator.
The second converter unit 110 is according to preset frequency, the intermediate-freuqncy signal of obtaining from the first converter unit 100 is converted to high-frequency signal, the frequency of this high-frequency signal is preset frequency, and under the frequency of this high-frequency signal up input signal that is this wireless product in frequency range.Wherein, this second converter unit 110 can be made up of radio circuit and logical circuit, and wherein, logical circuit can be realized by field programmable gate array (FPGA, Field Programmable Gate Array).
It will be appreciated that, because product category is many, up-downgoing frequency difference range is larger, therefore use the first frequency conversion and frequency conversion for the second time (i.e. two variable mode), the product of all frequency ranges is converted to intermediate frequency, again intermediate-freuqncy signal is carried out to high local oscillator, thereby be converted to the needed frequency of the up input signal of tested wireless product.Also it should be noted that, said high-frequency signal in full text, and radiofrequency signal, the normally identical signal of frequency range, is convenient to the signal that is input to the first converter unit 100 is described by high-frequency signal and radiofrequency signal, with the signal of exporting from the second converter unit 110; In addition, said high frequency, radio frequency, intermediate frequency are relative sayings, there is no clear and definite line of demarcation between high frequency and intermediate frequency, are the known general knowledge in the communications field, and therefore, said high-frequency signal, radiofrequency signal and intermediate-freuqncy signal are sayings clearly in this area.
The impedance of transmission line, according to the frequency of the high-frequency signal producing in the second converter unit 110, is adjusted in line matching unit 120, makes transmission line have good transmission characteristic for the high-frequency signal of different frequency.Then, by high-frequency signal output, the high-frequency signal of output, through being independent of the attenuator of the device that test signal is provided, is decayed by this attenuator, the high-frequency signal after decay is input to the input port of tested wireless product.Wherein, line matching unit 120 also can be made up of radio circuit and logical circuit, and wherein, logical circuit can be realized by FPGA.
Carrying out in sensitivity test, the signal of wireless product output, be input to the device that test signal is provided, order via the first converter unit 100, the second converter unit 110, with the processing of line matching unit 120 to signal, outside this provides the device of test signal, the high-frequency signal that line matching unit 120 is exported is decayed, and (this operation is carried out by attenuator, power attenuation size is preset, known), again by the signal after decay, be input in wireless product, until can not demodulate the signal of input in this wireless product time, the minimum signal power that this decay is exported afterwards, as the sensitivity test result of this wireless product.Wherein, in this process, suppose to provide in the device of test signal signal to decay to zero.A kind of above-mentioned method of carrying out sensitivity test, should not be construed the restriction to the embodiment of the present invention.
In the time carrying out the tests such as receiving gain, passband fluctuation, by the radiofrequency signal of tested wireless product output, through double conversion, finally input to this tested wireless product as test signal.Wherein, tested wireless product, according to the vector signal of input, is measured receiving gain, passband fluctuation etc., same as the prior art, does not describe in detail herein.
Provide the explanation of the device of test signal by above-mentioned to this, the signal of wireless product output is carried out double conversion by this device, the signal that makes final frequency conversion is the reception signal of this wireless product input, therefore, this provides the device of test signal can be the in the situation that of no signal source, carry out the tests such as the receiving sensitivity, gain, passband fluctuation of wireless product, this provides the device of test signal to be simple and easy to use, with low cost.
Further, this provides the device of test signal to comprise: the first power detecting unit 130.
Wherein, the first power detecting unit 130 detects from power and/or the frequency of wireless product output radiofrequency signal, or, be interpreted as that input provides power and/or the frequency of the signal of the device of test signal.The result detecting is sent to display unit 140 by the first power detecting unit 130, and display unit 140 shows the power of the wireless product output signal that the first power detecting unit 130 detects.It will be appreciated that, display unit 140 can be independent display, provides the device of test signal and do not belong to this.
Further, in order to ensure to provide the device of test signal as far as possible little to the decay of input signal at this, this provides the device of test signal to comprise: the second power detecting unit 150 and the first power output adjustment unit 160.
The second power detecting unit 150 detects power and/or the frequency of the signal of exporting from line matching unit 120.
The first power output adjustment unit 160, according to the power of preset radiofrequency signal and/or frequency, judges whether to adjust the power of the signal of exporting from line matching unit 120; The power of above-mentioned preset radiofrequency signal can be that tester decides according to input power and the frequency of the reception signal of tested wireless product.
Power and/or the frequency of the signal detecting when the second power detecting unit 150, be less than the power of preset radiofrequency signal and/or frequency (or, be less than the limiting value in power and/or the frequency error allowed band of preset radiofrequency signal) time, the first power output adjustment unit 160 is by the power of the signal of exporting from line matching unit 120 and/or frequency, adjust to identical with power and/or the frequency of preset radiofrequency signal, by the high-frequency signal output after adjusting;
The power of the signal detecting when the second power detecting unit 150, equal power and/or the frequency of preset radiofrequency signal, or, power and/or the frequency of the signal that the second power detecting unit 150 detects, in the power of preset radiofrequency signal and/or frequency error allowed band time, the first power output adjustment unit 160 does not deal with.
Wherein, the realization of the first power detecting unit 130 and the second power detecting unit 150 can be identical, by being made up of radio circuit and logical circuit, wherein, logical circuit can be realized by FPGA, radio circuit can be with reference in power detection part dotted line frame in the simple circuit shown in figure 2, first the radiofrequency signal detecting is decayed, or amplify and process, then, change radiofrequency signal into intermediate-freuqncy signal, then analog signal is converted to digital signal.Wherein, AD80142 is high-speed AD converter.
The first power output adjustment unit 160 can be realized by FPGA, also can be realized by other electronic device, not should be appreciated that the restriction to the present embodiment herein.
By increasing above-mentioned the first power detecting unit 130, make signal power and/or the frequency in this testing apparatus that be input to that tester can detect, can know power and/or the frequency of the lower line output of wireless product.
By increasing above-mentioned the second power detecting unit 150 and the first power output adjustment unit 160, this provides the device of test signal to detect power and/or the frequency of the signal of exporting from line matching unit 120 according to the second power detecting unit 150, the power of the signal of line matching unit 120 being exported by the first power output adjustment unit 160 is adjusted, the signal that the up input providing for test product in this device that test signal is provided is provided is as far as possible accurate, thereby obtains more accurate, correct test report.
Further, this provides the device of test signal to comprise: the first filter unit 170 and the second filter unit 180 be any one or whole wherein.
The first filter unit 170, for the intermediate-freuqncy signal of the first converter unit 100 outputs is carried out to filtering, inputs to the second converter unit 110 by filtered intermediate-freuqncy signal.Wherein, this first filter unit 170 can be SAW (Surface Acoustic Wave) filter (SAW, Surface Acoustic Wave), can be also other, can need concrete selection according to design.
The second filter unit 180, carries out filtering for the high-frequency signal that the second converter unit 110 is exported, and filtered high-frequency signal is inputed to line matching unit 120.The frequency spectrum of the high-frequency signal of exporting when the second converter unit 110 is in 0.8G to 1G scope, and the second filter unit 180 is low pass filter; The frequency spectrum of the high-frequency signal of exporting when the second converter unit 110 is in 1.8G to 2.1G scope, and the second filter unit 180 is high pass filter.Therefore, the second filter unit 180 can specifically comprise: low pass filter and/or high pass filter.
By increasing the first filter unit 170 and the second filter unit 180, make interference signal minimizing in the final high-frequency signal of exporting in this device that test signal is provided.
For the ease of understanding, it should be noted that, in Fig. 2, frequency conversion loop back path part is the first converter unit 100 shown in Fig. 1, the first filter unit 170, the second converter unit 110, the second filter unit 180, a kind of simple realization circuit of radio circuit part in line matching unit 120 and the first power output adjustment unit 160, feedback fraction power detection part is a kind of simple realization circuit of radio circuit part in the second power detecting unit 150 shown in Fig. 1, in conjunction with the explanation of Fig. 1 and Fig. 2, can be easier to understand the device that test signal is provided that the present embodiment provides, but to the restriction of the present embodiment, concrete radio circuit can also have other design, but, its mentality of designing is all based on principle of uniformity.There is similar explanation for the tone signal source part in Fig. 2 to the tone signal source unit 190 of explanation in following fact Example two.
Embodiment bis-,
A kind of device that test signal is provided that the present embodiment provides.This device that test signal is provided that provides the device of test signal to provide with above-described embodiment one is identical.This provides the device of test signal that vector signal not only can be provided, for testing wireless product receiving sensitivity, gain, passband fluctuation etc., the transmitting power that can also be used to test wireless product.
In the time that this provides the transmitting power that the device of test signal is used for measuring wireless product, all functions unit except the first power detecting unit 130 in the device of test signal is provided, can form a vector signal source, by the output of tested wireless product, via the processing that each functional unit in the device of test signal is provided, as the input of this tested wireless product.Wherein, designer can preset tested wireless product transmitting power, therefore, the first power detecting unit 130 also can detect power and/or the frequency of the signal of tested wireless product transmitting, the signal of tested wireless product transmitting comprises: tested wireless product is the signal of output initiatively, receive after described high-frequency signal with tested wireless product, trigger the signal of output.
By providing the explanation of the device of test signal to this, this testing apparatus utilizes the signal of tested wireless product output, through double conversion, signal frequency is converted to the frequency of the input signal of tested wireless product, signal after frequency conversion is inputed to tested wireless product, thereby make this device that test signal is provided substitute signal source instrument, and the first power detecting unit 130 detects tested wireless product and receives after described high-frequency signal, trigger power and/or the frequency of the signal of output, thereby make the first power detecting unit 130 substitute power meter, this provides the device of test signal can realize the object of low cost test wireless product.
Further, this provides the device of test signal to comprise: switch 300 and tone signal source unit 190.This tone signal source unit 190 can, according to preset power and/or frequency, produce tone signal; The tone signal of generation is inputed to tested wireless product, thus the signal source instrument of replace dedicated.Wherein, tone signal source unit can be realized by FPGA, also can be realized by other electronic device, should not be construed the restriction to the present embodiment herein.
Switch 300 will provide the device of test signal for selecting described in the signal output of line matching unit 120 outputs, or will described in the tone signal output of output in tone signal source unit 190, provide the device of test signal;
It will be appreciated that, the tone signal source that this tone signal source unit 190 provides, with in embodiment mono-by the first converter unit 100, the second converter unit 110, finally realize with line matching unit 120, by the input signal process double conversion processing of tested wireless product, then signal after treatment is inputed to tested wireless product, thereby the effect of substitution signal source instrument is identical, two classes provide the logical block of test signal to be realized and selected one by switch 300.Difference is, the tone signal that tone signal source unit 190 provides is according to some simple preset parameters, as the frequency of the tone signal providing according to preset requirement and/or power, produces the tone signal that meets frequency and/or power requirement, and by the first converter unit 100, the second converter unit 110, signal with the 120 final outputs of line matching unit, this signal is produced by tested wireless product at first, the vector characteristic of this signal is controlled, when the signal of tested wireless product output is through the first converter unit 100, the second converter unit 110, after the final output in line matching unit 120, its vector characteristic remains and can easily derive, and controlled when signal power, therefore, compared with tone signal source unit 190, by the first converter unit 100, the second converter unit 110, carry out substitution signal source instrument with line matching unit 120, can provide the signal that more vectors are described for tested wireless product, thereby can be suitably more accurate to the test analysis of wireless product.
And tone signal source unit 190 also can be used as the first converter unit 100, the second converter unit 110, with a kind of alternative of line matching unit 120, the main maintenance with the tested wireless product of opposing, as being depicted as above-mentioned a kind of alternative in dotted line frame in Fig. 1.
Further, the second power detecting unit 150 can also be for detection of the power of the tone signal of output in tone signal source unit 190; This provides the device of test signal to comprise: the second power output adjustment unit 200, be used for according to preset power and/or frequency, with power and/or frequency that tone signal detected in the second power detecting unit 150, judge whether power and/or the frequency of the tone signal of adjusting output.
The power of the tone signal detecting when the second power detecting unit 150, be less than preset power and/or frequency (or, the limiting value in preset power and/or frequency error allowed band) time, the second power output adjustment unit 200 will input to power and/or the frequency of tone signal of tested wireless product, adjust to identical with preset power, by the high-frequency signal output after adjusting; The power of the tone signal detecting when the second power detecting unit 150, equals preset power and/or frequency, or, be in preset power and/or frequency error allowed band time, the second power output adjustment unit 200 does not deal with.
It will be appreciated that, tone signal frequency range: 400M～2.7G, because the dynamic span of power is large, is designed to A, B two-way output, A road requires output 0～11dBm signal, B road require output-50～-70 and-20dBm signal.Provide as shown in Figure 3 the radio frequency between main collection radio-frequency line and the diversity radio-frequency line of tone signal source unit 190 and tested wireless product in the device of test signal to be connected simplified schematic diagram.Wherein, the tone signal that tone signal source unit 190 is exported, from the output of A road, by variable resistor and amplifier, can make the power of the tone signal of output increase 0 to 11dBm; The tone signal that tone signal source unit 190 is exported is from B road output, by variable resistor, can make the power of the tone signal of output reduce-50 to-70dBm.Provide from this tone signal finally providing device of test signal, Ke Yishi: for equipping the up tone signal (20dBm) of showing that does;
Or, for equipping the tone signal (11dBm) of blocking test;
Or, for keeping in repair the required signal pouring into of data feedback channel (50～-70dBm);
Or for keeping in repair the required signal pouring into of feedback path (0～5dBm), and tone signal power can closed-loop control.The advantage substituting behind commercial vector signal source is: adopt by directly preset needed frequency and watt level of the display interface in display unit 140; Significantly reduce existing maintenance cost.This display unit 140 can be that a guy's computer (PC, Personal Computer) provides the device of test signal to communicate by letter with this to realize Presentation Function.
By the above-mentioned explanation to the second power detecting unit 150 and the second power output adjustment unit 200, make this provide the tone signal providing in the device of test signal more accurate, the analysis that makes more to test many wireless products is more accurate.
Further, this provides the device of test signal to comprise: input unit 210, and for inputting preset power and frequency.
Further, this provides the device of test signal to comprise: memory cell 220, for storing test report, at least comprises in this test report: the output signal power that the first power detecting unit 130 detects.
Also it will be appreciated that, display unit 140 is for the power of the wireless product output signal that shows the first power detecting unit 130 and detect, concrete display interface as shown in Figure 4, by this display interface, tester can carry out preset to power and the frequency of the tone signal producing, can be by the numerical control calibrated presets that decays, make line matching unit 120 adjust the impedance of transmission line, the output signal power that can the first power detecting unit 130 be detected by derived data (Export) stores memory cell 220 into, by this display interface, it can also be seen that the time dependent oscillogram of output signal power that the first power detecting unit 130 detects, on this display interface, also show Internet protocol (IP, the Internet Protocol) address of the device that test signal is provided, illustrated that this device that test signal is provided communicates by letter with display unit 140 by IP mode.Needing to understand and be, is to provide to such an extent that the device of test signal is provided for the ease of understanding the present embodiment to the explanation of display interface, should not be construed the restriction to the present embodiment.
Also it should be noted that, the above-mentioned explanation to a kind of device that test signal is provided providing in embodiment mono-, two, it is the process angle to signal processing from this testing apparatus, the device that test signal is provided is divided into multiple functional units, and in fact, provide the device of test signal also can be divided into two parts, a part is radio circuit part, a part is baseband circuit part, wherein, baseband circuit part is mainly realized by central processing unit (CPU, Center Process Unit) chip and FPGA.Wherein, provide each functional unit in the device of test signal to be realized by radio circuit part and/or baseband circuit part, and the concrete scheme of realizing can be different, it is intelligible that this is that those skilled in the art can hold.Therefore, concrete radio circuit and baseband circuit are not explained and limited in the present embodiment.
Embodiment tri-,
The present embodiment provides a kind of method that test signal is provided, and as described in Figure 5, the method comprises:
Step 1: the radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
Because radiofrequency signal is difficult for processing, therefore, radiofrequency signal is converted into intermediate-freuqncy signal.The concrete frequency of this intermediate-freuqncy signal needs according to actual design and preset.
Step 2: according to preset frequency, intermediate-freuqncy signal is converted to high-frequency signal, the frequency of this high-frequency signal is preset frequency, and in the frequency of this high-frequency signal up input signal frequency range that is this wireless product;
Execution step 2 can acquire as tested wireless product reach the standard grade input signal, conventionally up input signal and the shared frequency range of descending output signal of wireless product are different, the frequency that need to be therefore, up input signal by the frequency change of descending output signal.Tester can be according to the above-mentioned preset frequency of the set of frequency of the up input signal of tested wireless product.
Step 3: according to the frequency of this high-frequency signal, adjust the impedance of transmission line, this high-frequency signal is exported with minimal attenuation;
Very complicated during due to the transmission of high-frequency signal, the difference of the efficiency of transmission of the high-frequency signal of same transmission medium to different frequency is also huge, therefore, as much as possible little to the decay of input signal in order to ensure to provide the device of test signal, so, need to perform step 3.
By the above-mentioned explanation to this wireless product method of testing, utilize the signal of tested wireless product output, through double conversion, signal frequency is converted to the frequency of the input signal of tested wireless product, signal after frequency conversion is exported to this device of test signal is provided, thereby make this device that test signal is provided substitute signal source instrument.
It will be appreciated that, in order to make signal power that step 3 exports be applicable to the requirement of up input, need to decay to the signal of output, therefore, further, the method also comprises:
Step 4: attenuator is decayed to adjusting the high-frequency signal of exporting after the impedance of transmission line, and the high-frequency signal after decay is inputed to tested wireless product.
Wherein, the function that it should be noted that the attenuator in step 4 also can be realized by the device that test signal is provided, that this provides the method for operation of device of test signal if step 7 is to as described in step 9 when realizing attenuator function by the device that test signal is provided.
Further, tested wireless product can, according to the high-frequency signal of input, be tested, and therefore, the method can also comprise:
Step 5: detect from power and/or the frequency of tested wireless product output signal, wherein, wireless product output signal comprises: wireless product is the signal of output initiatively, and wireless product receives the signal that triggers output after step 3 medium-high frequency signal.
By increasing above-mentioned steps 5, can detect power and/or the frequency of the signal of tested wireless product transmitting, this testing scheme can be realized the object of low cost test wireless product.
Wherein, adopt above-mentioned method of testing, also can test the receiving sensitivity of wireless product, concrete operation can be: tester reduces the power of tested wireless product output signal gradually, provide the execution above-mentioned steps 1 of device sequence of test signal to step 4, until this tested wireless product be can not demodulate the signal of input time, now the power output of wireless product just can represent the receiving sensitivity of this wireless product.
Further, after step 5, this wireless product method of testing can also comprise:
Step 6: show the power from wireless product output signal detecting.
By demonstrating the output signal power of the wireless product detecting, be convenient to tester to wireless product performance evaluation.
Further, after step 3, before step 4, this wireless product method of testing can also comprise:
Step 7: detect after the impedance of adjusting transmission line the power of the high-frequency signal of output and/or frequency;
Step 8: according to the power of preset radiofrequency signal and/or frequency, and the power of the described high-frequency signal detecting in step 7 and/or frequency, judge whether to adjust the signal power being input in tested wireless product, if, execution step 9, if not, does not carry out any operation;
Step 9: when the power and/or the frequency that are input to the signal in tested wireless product being detected, be less than the power of preset radiofrequency signal and/or frequency (or, be less than the limiting value in power and/or the frequency error allowed band of preset radiofrequency signal) time, to be input to power and/or the frequency of the signal in tested wireless product, adjust to identical with power and/or the frequency of preset radiofrequency signal.
By increasing above-mentioned steps 7 to step 9, ensure that the signal of the up input that this device that test signal is provided provides for test product is accurate as far as possible, thereby obtain more accurate, correct test report.
Further, after step 1, before step 2, this wireless product method of testing can also comprise:
Step 10: the intermediate-freuqncy signal of step 1 is carried out to filtering.
After step 2, before step 3, this wireless product method of testing can also comprise:
Step 11: the high-frequency signal in step 2 is carried out to filtering.
Reduce the interference of the signal of the device output from test signal is provided by increasing step 10 and/or step 11.
It should be noted that, the method providing in order conveniently to understand the present embodiment, above-mentioned steps 5 to step 11 does not show in Fig. 5.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is can carry out the hardware that instruction is relevant by program to complete, this program can be stored in a computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
A kind of device and method that test signal is provided above the embodiment of the present invention being provided is described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (12)
1. the device that test signal is provided, is characterized in that, comprising: the first converter unit, the second converter unit and line matching unit;
Described the first converter unit, for being converted to intermediate-freuqncy signal by the radiofrequency signal of tested wireless product output;
Described the second converter unit, for according to preset frequency, described intermediate-freuqncy signal being converted to high-frequency signal, the frequency of described high-frequency signal is described preset frequency;
Described line matching unit, for adjust the impedance of transmission line according to the frequency of described high-frequency signal, then exports described high-frequency signal as test signal;
By described the first converter unit, and described the second converter unit, the signal of tested wireless product output is carried out to double conversion, the signal that makes final frequency conversion is the reception signal of tested wireless product input.
2. the device that test signal is provided according to claim 1, is characterized in that, described in provide the device of test signal also to comprise: the first power detecting unit, for detection of power and/or the frequency of the radiofrequency signal of described tested wireless product output.
3. the device that test signal is provided according to claim 2, is characterized in that, described in provide the device of test signal also to comprise: input unit, memory cell, display unit is any one or any several combination wherein;
Described input unit, for inputting preset power and/or frequency;
Described memory cell, for storing test report, described test report at least comprises: the power of the radiofrequency signal of the tested wireless product output that described the first power detecting unit detects, and described preset power and/or frequency;
Described display unit, for showing described test report.
4. the device that test signal is provided according to claim 1, is characterized in that, described in provide the device of test signal also to comprise: the second power detecting unit and the first power output adjustment unit;
Described the second power detecting unit, inputs to power and/or the frequency of the high-frequency signal of tested wireless product for detection of described line matching unit;
Described the first power output adjustment unit, be used for power and/or the frequency of the high-frequency signal detecting when described the second power detecting unit, while being less than the power of preset radiofrequency signal and/or frequency, power and/or the frequency of high-frequency signal of tested wireless product will be inputed to, adjust to identical with power and/or the frequency of described preset radiofrequency signal, by the high-frequency signal output after adjusting;
Or, described the first power output adjustment unit, be used for the power of the high-frequency signal detecting when described the second power detecting unit, while being less than the limiting value in power and/or the frequency error allowed band of described preset radiofrequency signal, power and/or the frequency of high-frequency signal of tested wireless product will be inputed to, adjust to identical with power and/or the frequency of described preset radiofrequency signal, by the high-frequency signal output after adjusting.
5. the device that test signal is provided according to claim 1, is characterized in that, described in provide the device of test signal also to comprise: the first filter unit, for the intermediate-freuqncy signal of described the first converter unit output is carried out to filtering.
6. the device that test signal is provided according to claim 1, is characterized in that, described in provide the device of test signal also to comprise: the second filter unit, for the high-frequency signal of described the second converter unit output is carried out to filtering.
7. the device that test signal is provided according to claim 1, is characterized in that, described in provide the device of test signal also to comprise: switch and tone signal source unit;
Described tone signal source unit, for according to preset power and/or frequency, produces tone signal, inputs to described tested wireless product using described tone signal as test signal;
Described switch, for the device of test signal is provided described in the signal output of selecting described line matching unit to export, or will provide the device of test signal described in the tone signal output of exporting in described tone signal source unit;
Wherein, described tone signal source unit can substitute described the first converter unit, the second converter unit and line matching unit.
8. the device that test signal is provided according to claim 7, it is characterized in that, the described device that test signal is provided also comprises: the second power detecting unit, and described the second power detecting unit is for detection of power and/or the frequency of the tone signal of described generation;
; the described device that test signal is provided also comprises: the second power output adjustment unit; for power and/or frequency when the tone signal detecting; while being less than preset power and/or frequency; by described tone signal power and/or the frequency that inputs to described tested wireless product; adjust to identical with described preset power and/or frequency, by adjust after tone signal input to described tested wireless product;
Or, the second power output adjustment unit, for power and/or frequency when the tone signal detecting, while being less than the limiting value in preset power and/or frequency error allowed band, the described tone signal power that inputs to described tested wireless product and/or frequency are adjusted to identical with described preset power and/or frequency, the tone signal after adjusting is inputed to described tested wireless product.
9. the method that test signal is provided, is characterized in that, comprising:
The radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
According to preset frequency, described intermediate-freuqncy signal is converted to high-frequency signal, the frequency of described high-frequency signal is described preset frequency;
Adjust the impedance of transmission line according to the frequency of described high-frequency signal, described high-frequency signal is exported as test signal;
Be converted to intermediate-freuqncy signal by the described radiofrequency signal by tested wireless product output, and according to preset frequency, described intermediate-freuqncy signal is converted to high-frequency signal, the signal of tested wireless product output is carried out to double conversion, and the signal that makes final frequency conversion is the reception signal of tested wireless product input.
10. method according to claim 9, is characterized in that, described by after described high-frequency signal output, described method also comprises:
Attenuator is decayed to the high-frequency signal of described output, and the high-frequency signal after decay is inputed to described tested wireless product as test signal.
11. methods according to claim 9, is characterized in that, described method also comprises:
Detect from the power of the radiofrequency signal of described tested wireless product output, the radiofrequency signal of described tested wireless product output comprises: the initiatively signal of output of described tested wireless product, receive after described high-frequency signal with described tested wireless product, trigger the signal of output.
12. methods according to claim 9, is characterized in that, after the impedance of described adjustment transmission line, using described high-frequency signal as test signal, before output, described method also comprises:
Detect after the impedance of described adjustment transmission line the power of described high-frequency signal and/or frequency;
According to the power of preset radiofrequency signal and/or frequency, and the power of the described high-frequency signal detecting and/or frequency, judge whether to adjust the power and/or the frequency that are input to high-frequency signal described in tested wireless product;
If so,, by described power and/or the frequency that is input to the high-frequency signal in tested wireless product, adjust to identical with power and/or the frequency of described preset radiofrequency signal;
High-frequency signal after adjusting is exported as test signal.
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| CN103138858B (en) * | 2013-01-22 | 2015-01-28 | 中兴通讯股份有限公司 | Test system for interface board |
| CN109302202B (en) * | 2018-10-31 | 2020-06-02 | 北京小米移动软件有限公司 | Radio frequency circuit, circuit testing device, circuit testing method and electronic device |
| CN110445555B (en) * | 2019-07-09 | 2022-07-19 | 中信科移动通信技术股份有限公司 | Automatic measuring device and method for communication equipment |
| CN110830397B (en) * | 2019-11-04 | 2020-12-11 | 珠海格力电器股份有限公司 | HBS-based attenuation resistor self-adaption method, communication circuit and multi-connected unit |
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