CN101997620A - Device and method for providing test signals - Google Patents
Device and method for providing test signals Download PDFInfo
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- CN101997620A CN101997620A CN2009101629700A CN200910162970A CN101997620A CN 101997620 A CN101997620 A CN 101997620A CN 2009101629700 A CN2009101629700 A CN 2009101629700A CN 200910162970 A CN200910162970 A CN 200910162970A CN 101997620 A CN101997620 A CN 101997620A
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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, accurate more instrument is tested and keeped in repair wireless product, as: comprehensive tester, spectrum analyzer, vector signal generator, power meter etc.
A kind of method in common of existing test wireless product is: adopt the up input of vector signal source as tested single board, after tested wireless product receives up input signal, can test out the parameter relevant, as receiving sensitivity, gain, passband fluctuation etc. with up input signal; Perhaps,, can measure the downstream signal of output, more Vector Messages of the downstream signal of tested wireless product output are shown to the tester by spectrum analyzer with spectrum analyzer for the downstream signal of tested wireless product output.
In research and practice process to prior art, the present inventor finds, the signal source instrument, 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 the instrument volume is big, not Easy Move and carrying is unfavorable for whenever and wherever possible wireless product being tested.
Summary of the invention
The embodiment of the invention provides a kind of method that the device of test signal is provided and test signal is provided, and can provide test signal for the wireless product test by substitution signal source instrument.
The embodiment of the invention provides a kind of device that test signal is provided, and comprising: first converter unit, second converter unit and circuit matching unit;
Described first converter unit is used for the radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
Described second converter unit is used for according to the frequency that presets described intermediate-freuqncy signal being converted to high-frequency signal, and the frequency of described high-frequency signal is the described frequency that presets;
Described circuit matching unit is used for adjusting according to the frequency of described high-frequency signal the impedance of transmission line, then described high-frequency signal is exported as test signal.
The embodiment of the 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 the frequency that presets described intermediate-freuqncy signal is converted to high-frequency signal, the frequency of described high-frequency signal is the described frequency that presets;
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 invention adopts the signal to wireless product output to carry out double conversion, make that the signal of final frequency conversion is the received signal of this wireless product input, therefore, this provides the device of test signal can replace the vector signal source, carry out the tests such as receiving sensitivity, gain and passband fluctuation of wireless product, this provides the device of test signal to be simple and easy to usefulness, and is with low cost.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of functional unit schematic diagram that the device of test signal is provided that present embodiment one provides;
The simple circuit figure of radio frequency part in Fig. 2 is that present embodiment one provides a kind of device that test signal is provided;
Fig. 3 is that the tone signal source unit that present embodiment two provides is connected simplified schematic diagram with the main collection radio-frequency line of tested wireless product and the radio frequency between the diversity radio-frequency line;
Fig. 4 is a kind of display interface of the device to test result that test signal is provided that provides of present embodiment two;
Fig. 5 is a kind of method simplified schematic diagram that test signal is provided that present embodiment three provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one,
Present embodiment provides a kind of device that test signal is provided.
Before the embodiment of the invention is done explanation, at first, need to prove; when wireless product being done test; usually can measure the receiving sensitivity, gain, passband fluctuation of this wireless product etc., wherein, receiving sensitivity represents that receiver receives required minimum power input.When wireless product receives input power less than minimum power input, this wireless product can't parse the signal of input.Usually provide test signal to wireless product by the signal source instrument,, test out receiving sensitivity, gain, passband fluctuation etc. by wireless product and measure as the up input signal of wireless product.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 test such as sensitivity, gain, passband fluctuation of wireless product.
As shown in Figure 1, this provides the device of test signal to comprise: first converter unit, 100, the second converter units 110 and circuit matching unit 120.The direction indication of arrow enters the flow direction of the signal in this device that test signal is provided among Fig. 1.
Wherein, wireless product output radiofrequency signal is transferred to first converter unit 100 of the device that test signal is provided by radio-frequency line, by first converter unit 100 radiofrequency signal is converted to intermediate-freuqncy signal.Because radiofrequency signal be difficult for to be handled, therefore, radiofrequency signal is converted into intermediate-freuqncy signal by first converter unit 100.The concrete frequency of this intermediate-freuqncy signal presets according to the practical design needs.The specific implementation of first converter unit 100 can be realized by a local oscillator.
It will be appreciated that, because product category is many, up-downgoing frequency difference range is bigger, therefore use first frequency conversion and frequency conversion for the second time (promptly two variable mode), the product of all frequency ranges is converted to intermediate frequency, again intermediate-freuqncy signal is carried out high local oscillator, thereby be converted to the needed frequency of the up input signal of tested wireless product.Also need to prove, said high-frequency signal in the full text, and radiofrequency signal, normally the identical signal of frequency range is convenient to illustrate the signal that is input to first converter unit 100 with high-frequency signal and radiofrequency signal, with the signal from 110 outputs of second converter unit; In addition, said high frequency, radio frequency, intermediate frequency are relative sayings, do not have clear and definite line of demarcation between high frequency and the 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.
In carrying out sensitivity test, the signal of wireless product output, be input to the device that test signal is provided, the order via first converter unit 100, second converter unit 110, with 120 pairs of Signal Processing of circuit matching unit, outside this provided the device of test signal, the high-frequency signal of circuit matching unit 120 output decayed, and (this operation was by the attenuator execution, and the power attenuation size presets, be known), signal after will decaying again is input in the wireless product, in the time of can not demodulating the signal of input in this wireless product, with the minimum signal power of this decay back output, as the sensitivity test result of this wireless product.Wherein, in this process, suppose to provide in the device of test signal signal decayed to zero.Above-mentioned a kind of method of carrying out sensitivity test should not be construed the restriction to the embodiment of the invention.
When carrying out test such as receiving gain, passband fluctuation, the radiofrequency signal with tested wireless product output through double conversion, finally inputs to this tested wireless product as test signal.Wherein, tested wireless product is measured receiving gain, passband fluctuation etc. according to the vector signal of input, and is same as the prior art, do not describe in detail herein.
Provide the explanation of the device of test signal by above-mentioned to this, this device carries out double conversion with the signal of wireless product output, make that the signal of final frequency conversion is the received signal of this wireless product input, therefore, this provides the device of test signal can be under the situation in no signal source, carry out the test such as receiving sensitivity, gain, passband fluctuation of wireless product, this provides the device of test signal to be simple and easy to usefulness, and is with low cost.
Further, this provides the device of test signal to comprise: first power detecting unit 130.
Wherein, first power detecting unit 130 detects from the power and/or the frequency of wireless product output radiofrequency signal, perhaps, is interpreted as the power and/or the frequency of the signal of importing the device that test signal is provided.First power detecting unit 130 sends to display unit 140 with detected result, and display unit 140 shows the power of first power detecting unit, 130 detected wireless product output signals.It will be appreciated that display unit 140 can be independent display, and does not belong to the device that this provides test signal.
Further, in order to guarantee 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: second power detecting unit 150 and the first power output adjustment unit 160.
Second power detecting unit 150 detects from the power and/or the frequency of the signal of circuit matching unit 120 outputs.
The first power output adjustment unit 160 judges whether to adjust the power from the signal of circuit matching unit 120 outputs according to the power and/or the frequency of the radiofrequency signal that presets; Can to be the tester decide according to the input power and the frequency of the received signal of tested wireless product the power of the above-mentioned radiofrequency signal that presets.
The power and/or the frequency of the signal that detects when second power detecting unit 150, less than the power of the radiofrequency signal that presets and/or frequency (perhaps, less than the power of the radiofrequency signal that presets and/or the limiting value in the frequency error allowed band) time, the first power output adjustment unit 160 will be from the power and/or the frequency of the signal of circuit matching unit 120 output, adjust to identical with the power and/or the frequency of the radiofrequency signal that presets, with the output of adjusted high-frequency signal;
The power of the signal that detects when second power detecting unit 150, the power of the radiofrequency signal that equals to preset and/or frequency, perhaps, the power and/or the frequency of the signal that second power detecting unit 150 detects, in the time of in the power of the radiofrequency signal that presets and/or frequency error allowed band, then the first power output adjustment unit 160 does not deal with.
Wherein, the realization of first power detecting unit 130 and second power detecting unit 150 can be identical, promptly 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 the power detection part frame of broken lines in the simple circuit shown in Figure 2, at first detected radiofrequency signal is decayed, perhaps processing and amplifying, then, changing radiofrequency signal into intermediate-freuqncy signal, is digital signal with analog signal conversion again.Wherein, AD80142 is a 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 present embodiment herein.
By increasing above-mentioned first power detecting unit 130, make the tester can detectedly be input to signal power and/or the frequency in this testing apparatus, promptly can know the power and/or the frequency of the following line output of wireless product.
By increasing above-mentioned second power detecting unit 150 and the first power output adjustment unit 160, this provides the device of test signal to detect from the power and/or the frequency of the signal of circuit matching unit 120 outputs according to second power detecting unit 150, power by the signal of 160 pairs of circuit matching units of the first power output adjustment unit 120 output is adjusted, the signal that the up input that provides for test product in this device that test signal is provided is provided as far as possible is accurate, thereby obtains more accurate, correct test report.
Further, this provides the device of test signal to comprise: first filter unit 170 and second filter unit 180 wherein each or all.
By increasing by first filter unit 170 and second filter unit 180, make this that interference signal minimizing in high-frequency signal of finally exporting in device of test signal is provided.
For the ease of understanding, need to prove, the frequency conversion loop back path partly is first converter unit 100 shown in Fig. 1 among Fig. 2, first filter unit 170, second converter unit 110, second filter unit 180, a kind of simple and easy realization circuit of radio circuit part in the circuit matching unit 120 and the first power output adjustment unit 160, the feedback fraction power detection part is a kind of simple and easy realization circuit of radio circuit part in second power detecting unit 150 shown in Fig. 1, explanation in conjunction with Fig. 1 and Fig. 2, can be more readily understood the device that test signal is provided that present embodiment provides, but restriction to present embodiment, concrete radio circuit can also have other design, but its mentality of designing all is based on principle of uniformity.Tone signal source unit 190 for explanation in the tone signal source part among Fig. 2 and the following fact Example two has similar explanation.
Embodiment two,
A kind of device that test signal is provided that present embodiment provides.This provides the device of test signal can be identical with the device that test signal is provided that the foregoing description one provides.This provides the device of test signal not only can provide vector signal, is used to test wireless product receiving sensitivity, gain, passband fluctuation etc., the transmitting power that can also be used to testing wireless product.
When this provides the device of test signal to be used for measuring the transmitting power of wireless product, all functions unit except first power detecting unit 130 in the device of test signal is provided, can form a vector signal source, output with tested wireless product, via the processing of each functional unit in the device that test signal is provided, as the input of this tested wireless product.Wherein, the designer can preset the transmitting power of tested wireless product, therefore, first power detecting unit 130 also can detect the power and/or the frequency of the signal of tested wireless product emission, the signal of tested wireless product emission comprises: the signal that tested wireless product is initiatively exported, after receiving described high-frequency signal with tested wireless product, trigger the signal of output.
By this being provided the explanation of the device of test signal, 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 the frequency conversion is inputed to tested wireless product, thereby make this provide the device of test signal to substitute the signal source instrument, and after the tested wireless product of first power detecting unit, 130 detections receives described high-frequency signal, trigger the power and/or the frequency of the signal of output, thereby make the power detecting unit 130 of winning substitute power meter, this provides the device of test signal can realize the purpose 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 produce tone signal according to power that presets and/or frequency; The tone signal that produces is inputed to tested wireless product, thus the signal source instrument of replace dedicated.Wherein, the tone signal source unit can be realized by FPGA, also can be realized by other electronic device, should not be construed the restriction to present embodiment herein.
Switch 300 is used for selecting the signal with 120 outputs of circuit matching unit to export the described device that test signal is provided, and perhaps the tone signal of output in the tone signal source unit 190 is exported the described device that test signal is provided;
It will be appreciated that, the tone signal source that this tone signal source unit 190 provides, with among the embodiment one by first converter unit 100, second converter unit 110, realize finally that with circuit matching unit 120 input signal of tested wireless product is handled through double conversion, and the signal after will handling again inputs to tested wireless product, thereby the effect of substitution signal source instrument is identical, and two classes provide the logical block of test signal to realize selecting one by switch 300.Difference is that the tone signal that tone signal source unit 190 provides is according to some simple preset parameters, and the frequency and/or the power of the tone signal that the requirement of presetting as basis provides produce the tone signal that meets frequency and/or power requirement; And by first converter unit 100, second converter unit 110, signal with the 120 final outputs of circuit 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 through first converter unit 100, second converter unit 110, after the 120 final outputs of circuit matching unit, its vector characteristic remains and can derive easily, and controlled during signal power, therefore, compare with tone signal source unit 190, come substitution signal source instrument by first converter unit, 100, the second converter units 110 and circuit matching unit 120, can provide the signal of more vectors descriptions for tested wireless product, thereby suitably the test analysis to wireless product is more accurate.
And tone signal source unit 190 also can be used as first converter unit 100, second converter unit 110, with a kind of alternative of circuit matching unit 120, main maintenance with the tested wireless product of opposing is as being depicted as above-mentioned a kind of alternative in the frame of broken lines among Fig. 1.
Further, second power detecting unit 150 can also be used for detecting the power of the tone signal of tone signal source unit 190 outputs; This provides the device of test signal to comprise: the second power output adjustment unit 200, be used for according to the power and/or the frequency that preset, with the power and/or the frequency that detect tone signal in second power detecting unit 150, judge whether to adjust the power and/or the frequency of the tone signal of output.
The power of the tone signal that detects when second power detecting unit 150, less than the power that presets and/or frequency (perhaps, be the power that presets and/or the limiting value in the frequency error allowed band) time, the second power output adjustment unit 200 will input to the power and/or the frequency of the tone signal of tested wireless product, adjust to identical with the power that presets, with the output of adjusted high-frequency signal; The power of the tone signal that detects when second power detecting unit 150, power that equals to preset and/or frequency perhaps, are in the power that presets and/or the 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 of the dynamic span of power is big, is designed to A, B two-way output, the A road requires output 0～11dBm signal, the B road require output-50～-70 and-the 20dBm signal.Provide as shown in Figure 3 that tone signal source unit 190 is connected simplified schematic diagram with the main collection radio-frequency line of tested wireless product and the radio frequency between the diversity radio-frequency line in the device of test signal.Wherein, the tone signal of tone signal source unit 190 outputs is exported from the A road, then by variable resistor and amplifier, and can be so that the power of the tone signal of output increases 0 to 11dBm; The tone signal of tone signal source unit 190 output is from the output of B road, then by variable resistor, and can be so that the power of the tone signal of output reduces-50 to-70dBm.Provide the tone signal that finally provides the device of test signal from this, can be: be used to equip the up tone signal of making table (20dBm);
Perhaps, be used to equip the tone signal (11dBm) of blocking test;
Perhaps, be used to keep in repair the required signal that pours into of data feedback channel (50～-70dBm);
Perhaps, be used to keep in repair the required signal that pours into of feedback path (0～5dBm), but and tone signal power closed-loop control.Advantage behind the alternative commercial vector signal source is: adopt and directly preset needed frequency and watt level by the display interface in the display unit 140; Reduce existing maintenance cost significantly.Can to be a guy's computer (PC, Personal Computer) provide the device of test signal to communicate by letter with this to this display unit 140 realizes Presentation Function.
By above-mentioned explanation to second power detecting unit 150 and the second power output adjustment unit 200, make this provide the tone signal that provides in the device of test signal more accurate, make that the analysis of testing many wireless products more is more accurate.
Further, this provides the device of test signal to comprise: input unit 210 is used to import the power and the frequency that preset.
Further, this provides the device of test signal to comprise: memory cell 220, be used to store test report, and comprise at least in this test report: first power detecting unit, 130 detected output signal powers.
Also it will be appreciated that, display unit 140 is used to show the power of first power detecting unit, 130 detected wireless product output signals, concrete display interface as shown in Figure 4, by this display interface, the tester can preset the power and the frequency of the tone signal that produces, can be by the numerical control calibrated presets that decays, make circuit matching unit 120 adjust the impedance of transmission line, can store first power detecting unit, 130 detected output signal powers into memory cell 220 by derived data (Export), by this display interface, it can also be seen that the time dependent oscillogram of first power detecting unit, 130 detected output signal powers; Internet protocol (IP, the Internet Protocol) address that has also shown the device that test signal is provided on this display interface illustrates that this device that test signal is provided communicates by letter with display unit 140 by the IP mode.Need understanding and to be, is to provide to such an extent that the device of test signal is provided for the ease of understanding present embodiment to the explanation of display interface, should not be construed the restriction to present embodiment.
Also need to prove, above-mentioned a kind of explanation that the device of test signal is provided to providing among the embodiment one, two, be from the process angle of this testing apparatus to signal processing, the device that test signal is provided is divided into a plurality of functional units, and in fact, provide the device of test signal also can be divided into two parts, a part is the radio circuit part, a part is the baseband circuit part, wherein, the baseband circuit part is mainly realized by central processing unit (CPU, Center Process Unit) chip and FPGA.Wherein, provide in the device of test signal each functional unit partly to be realized by radio circuit part and/or baseband circuit, and the concrete scheme that realizes can be different, this is that those skilled in the art can understand easily.Therefore, concrete radio circuit and baseband circuit are not done explanation and restriction in the present embodiment.
Embodiment three,
Present embodiment provides a kind of method that test signal is provided, and as described in Figure 5, this method comprises:
Step 1: the radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
Because radiofrequency signal is difficult for handling, and therefore, radiofrequency signal is converted into intermediate-freuqncy signal.The concrete frequency of this intermediate-freuqncy signal presets according to the practical design needs.
Step 2: the frequency according to presetting, intermediate-freuqncy signal is converted to high-frequency signal, the frequency of this high-frequency signal is the frequency that presets, and the frequency of this high-frequency signal is in the up input signal frequency range of this wireless product;
Execution in step 2 can acquire the signal of reaching the standard grade and importing as tested wireless product, usually the up input signal of wireless product is different with the shared frequency range of descending output signal, therefore, descending output signal frequency need be changed to the frequency of up input signal.The tester can be according to the above-mentioned frequency that presets of frequency configuration 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, make this high-frequency signal export with minimal attenuation;
Because it is very complicated during the transmission of high-frequency signal, same transmission medium also is huge to the difference of the efficiency of transmission of the high-frequency signal of different frequency, and is therefore, as much as possible little to the decay of input signal in order to guarantee to provide the device of test signal, so, need execution in step 3.
By 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 the frequency conversion is exported the device that this provides test signal, thereby make this provide the device of test signal to substitute the signal source instrument.
It will be appreciated that in order to make the signal power of step 3 output be fit to the requirement of up input, need decay to the signal of output, therefore, further, this method also comprises:
Step 4: the high-frequency signal of exporting after the impedance of attenuator to the adjustment transmission line is decayed, and the high-frequency signal after the decay is inputed to tested wireless product.
Wherein, the function that need to prove the attenuator in the step 4 also can be realized by the device that test signal is provided, when realizing that by the device that test signal is provided the attenuator function is, this method of operation of device that test signal is provided as step 7 as described in the step 9.
Further, tested wireless product can be tested according to the high-frequency signal of input, and therefore, this method can also comprise:
Step 5: detect power and/or frequency from tested wireless product output signal, wherein, the wireless product output signal comprises: signal that wireless product is initiatively exported and wireless product trigger the signal of exporting after receiving step 3 medium-high frequency signal.
By increasing above-mentioned steps 5, can detect the power and/or the frequency of the signal of tested wireless product emission, this testing scheme can be realized the purpose 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: the tester reduces the power of tested wireless product output signal gradually, the execution above-mentioned steps 1 of device sequence that test signal is provided is to step 4, till when this tested wireless product can not demodulate the signal of input, then this moment wireless product power output 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 detected power from the wireless product output signal.
By demonstrating the output signal power of detected wireless product, be convenient to the tester to the wireless product performance evaluation.
Further, after step 3, before the step 4, this wireless product method of testing can also comprise:
Step 7: after detecting the impedance of adjusting transmission line, the power of the high-frequency signal of output and/or frequency;
Step 8: power and/or frequency according to detected described high-frequency signal in the power of the radiofrequency signal that presets and/or frequency and the step 7 judge whether to adjust the signal power that is input in the tested wireless product, if, execution in step 9 if not, is not then carried out any operation;
Step 9: when detecting power and/or the frequency that is input to the signal in the tested wireless product, less than the power of the radiofrequency signal that presets and/or frequency (perhaps, less than the power of the radiofrequency signal that presets and/or the limiting value in the frequency error allowed band) time, to be input to the power and/or the frequency of the signal in the tested wireless product, adjust to identical with the power and/or the frequency of the radiofrequency signal that presets.
By increasing above-mentioned steps 7, guarantee that as far as possible the signal of the up input that this device that test signal is provided provides for test product is accurate, thereby obtain more accurate, correct test report to step 9.
Further, after step 1, before the step 2, this wireless product method of testing can also comprise:
Step 10: the intermediate-freuqncy signal to step 1 is carried out filtering.
After step 2, before the step 3, this wireless product method of testing can also comprise:
Step 11: the high-frequency signal in the step 2 is carried out filtering.
Reduce from the interference of the signal of device output that test signal is provided by increasing step 10 and/or step 11.
Need to prove, understand the method that present embodiment provides for convenience, 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 the foregoing description is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
More than a kind of device and method of test signal that provides that the embodiment of the invention provided is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. the device that test signal is provided is characterized in that, comprising: first converter unit, second converter unit and circuit matching unit;
Described first converter unit is used for the radiofrequency signal of tested wireless product output is converted to intermediate-freuqncy signal;
Described second converter unit is used for according to the frequency that presets described intermediate-freuqncy signal being converted to high-frequency signal, and the frequency of described high-frequency signal is the described frequency that presets;
Described circuit matching unit is used for adjusting according to the frequency of described high-frequency signal the impedance of transmission line, then described high-frequency signal is exported as test signal.
2. the device that test signal is provided according to claim 1 is characterized in that, the described device of test signal that provides also comprises: first power detecting unit is used to detect the 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, the described device of test signal that provides also comprises: input unit, and memory cell, display unit is each or any several combination wherein;
Described input unit is used to import the power and/or the frequency that preset;
Described memory cell is used to store test report, and described test report comprises at least: power and the described power that presets and/or the frequency of the radiofrequency signal of the detected tested wireless product output of described first power detecting unit;
Described display unit is used to show described test report.
4. the device that test signal is provided according to claim 1 is characterized in that, the described device of test signal that provides also comprises: second power detecting unit and the first power output adjustment unit;
Described second power detecting unit is used to detect power and/or the frequency that described circuit matching unit inputs to the high-frequency signal of tested wireless product;
The described first power output adjustment unit, be used for power and/or frequency when the detected high-frequency signal of described second power detecting unit, during less than the power of the radiofrequency signal that presets and/or frequency, the power and/or the frequency of the high-frequency signal of tested wireless product will be inputed to, adjust to identical with the power and/or the frequency of the described radiofrequency signal that presets, with the output of adjusted high-frequency signal;
Perhaps, the described first power output adjustment unit, be used for power when the detected high-frequency signal of described second power detecting unit, during less than the power of the described radiofrequency signal that presets and/or the limiting value in the frequency error allowed band, the power and/or the frequency of the high-frequency signal of tested wireless product will be inputed to, adjust to identical with the power and/or the frequency of the described radiofrequency signal that presets, with the output of adjusted high-frequency signal.
5. the device that test signal is provided according to claim 1 is characterized in that, the described device of test signal that provides also comprises: first filter unit is used for the intermediate-freuqncy signal of described first converter unit output is carried out filtering.
6. the device that test signal is provided according to claim 1 is characterized in that, the described device of test signal that provides also comprises: second filter unit is used for the high-frequency signal of described second converter unit output is carried out filtering.
7. the device that test signal is provided according to claim 1 is characterized in that, the described device of test signal that provides also comprises: switch and tone signal source unit;
Described tone signal source unit is used for producing tone signal according to the power and/or the frequency that preset, and described tone signal is inputed to described tested wireless product as test signal;
Described switch, the signal that is used for selecting described circuit matching unit is exported is exported the described device that test signal is provided, perhaps with the described device of exporting in the described tone signal source unit that test signal is provided of tone signal output;
Wherein, described tone signal source unit can substitute described first converter unit, second converter unit and circuit matching unit.
8. the device that test signal is provided according to claim 7 is characterized in that, described second power detecting unit also is used to detect the power and/or the frequency of the tone signal of described generation;
Then, the described device of test signal that provides also comprises: the second power output adjustment unit, be used for power and/or frequency when detected tone signal, during less than power that presets and/or frequency, with described tone signal power and/or the frequency that inputs to described tested wireless product, adjust to identically, adjusted tone signal is inputed to described tested wireless product with described power that presets and/or frequency;
Perhaps, the second power output adjustment unit, be used for power and/or frequency when detected tone signal, during less than the limiting value in power that presets and/or the frequency error allowed band, the described tone signal power that inputs to described tested wireless product and/or frequency are adjusted to identical, adjusted tone signal is inputed to described tested wireless product with described power that presets and/or frequency.
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 the frequency that presets described intermediate-freuqncy signal is converted to high-frequency signal, the frequency of described high-frequency signal is the described frequency that presets;
Adjust the impedance of transmission line according to the frequency of described high-frequency signal, described high-frequency signal is exported as test signal.
10. method according to claim 9 is characterized in that, described with after the 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 the decay is inputed to described tested wireless product as test signal.
11. method according to claim 9 is characterized in that, described method also comprises:
Detection is from the power of the radiofrequency signal of described tested wireless product output, the radiofrequency signal of described tested wireless product output comprises: the signal that described tested wireless product is initiatively exported, after receiving described high-frequency signal with described tested wireless product, trigger the signal of output.
12. method according to claim 9 is characterized in that, after the impedance of described adjustment transmission line, as before the test signal output, described method also comprises with described high-frequency signal:
After detecting the impedance of described adjustment transmission line, the power of described high-frequency signal and/or frequency;
Power and/or frequency according to power and/or the frequency and the detected described high-frequency signal of the radiofrequency signal that presets judge whether to adjust the power and/or the frequency that are input to high-frequency signal described in the tested wireless product;
If, adjust to identical with the power and/or the frequency of the described radiofrequency signal that presets then with described power and/or the frequency that is input to the high-frequency signal in the tested wireless product;
Adjusted high-frequency signal is exported as test signal.
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| CN101997620B (en) | 2014-09-03 |
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