CN101655542A - Method for calibrating digital oscilloscope - Google Patents
Method for calibrating digital oscilloscope Download PDFInfo
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- CN101655542A CN101655542A CN200910108941A CN200910108941A CN101655542A CN 101655542 A CN101655542 A CN 101655542A CN 200910108941 A CN200910108941 A CN 200910108941A CN 200910108941 A CN200910108941 A CN 200910108941A CN 101655542 A CN101655542 A CN 101655542A
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Abstract
The invention relates to a method for calibrating a digital oscilloscope, comprising the following steps: S1: inputting a standard signal; S2: judging whether calibration is required, if so, performing S3, otherwise, performing S4; S3: adjusting corresponding parameters and performing S2; and S4: terminating. The above method for calibrating digital oscilloscopes needs no special calibrating instruments, and can finish various calibration processes only by inputting a standard signal and adjusting corresponding parameters, thus lowering calibration cost greatly. A user can use the above calibrating method for calibrating digital oscilloscopes at any time, therefore, the stable degree of the calibration results can be ensured.
Description
Technical field
The present invention relates to a kind of method for calibrating digital oscilloscope.
Background technology
Usually digital oscilloscope all must be calibrated before dispatching from the factory, and in present digital oscilloscope production calibration, normally adopts special calibration instrument and correction program to calibrate automatically.But the calibration instrument cost is very expensive, and calibration result also is unsettled simultaneously.This all is to carry out at normal temperatures because of calibration, after the user takes oscillograph, in environment temperature with the temperature contrast when calibrating originally when bigger, when perhaps bigger variation took place temperature in the course of the work, oscillographic working condition was just unstable or occur unusual.
Summary of the invention
In view of this, be necessary, provide a kind of and can reduce calibration cost and the stable method for calibrating digital oscilloscope of calibration result at conventional digital Oscilloscope Calibration cost costliness and calibration result problem of unstable.
A kind of method for calibrating digital oscilloscope comprises: S1: import a standard signal; S2: judge whether and need calibrate, if, carry out S3, if not, carry out S4; S3: adjust relevant parameter, carry out S2 then; S4: finish.
Preferably, described standard signal is the bandwidth frequency sinusoidal signal; It is described that to judge whether to calibrate be to judge that the waveform that display screen shows has or not burr; Described relevant parameter is that waveform phase is poor.
Preferably, described standard signal is the high frequency sinusoidal signal; It is described that to judge whether to calibrate be to judge that the waveform that display screen shows has or not projection; Described adjustment relevant parameter comprises moves the bossing of waveform to following one-period, removes the sampled point of boundary, and the sampled point of removing is carried out interpolation.
Preferably, described standard signal is a sinusoidal signal; It is described that to judge whether to calibrate be to judge whether central point is positioned at the display screen center; Described relevant parameter is the distance at central point and display screen center.
Preferably, described standard signal is a voltage signal; It is described that to judge whether to calibrate be to judge that whether voltage signal is greater than preset level; Described adjustment relevant parameter comprises the amplitude that increases preset level, judges whether to trigger, if, then carry out S4, if not, then carry out S2.
Preferably, described standard signal is a voltage signal; It is described that to judge whether to calibrate be the value of the voltage signal of judging whether peak-to-peak value equals to import; Described relevant parameter is a voltage amplification factor.
It is preferably, described that to judge whether to calibrate be the frequency whether reading of determination frequency meter equals standard signal; Described relevant parameter is the clock compensation parameter.
Above-mentioned method for calibrating digital oscilloscope does not need special calibration instrument, only needs to import a standard signal and adjust relevant parameters and can finish various calibration processes, and therefore, the calibration cost reduces greatly.And the user can adopt above-mentioned calibration steps calibration digital oscilloscope at any time, and therefore, the degree of stability of calibration result also can be guaranteed.
Embodiment
Method for calibrating digital oscilloscope may further comprise the steps:
S1: import a standard signal;
S2: judge whether and need calibrate, if, carry out S3, if not, carry out S4;
S3: adjust relevant parameter, carry out S2 then;
S4: finish.
Specifically need the project of calibration comprise random calibration, in real time rock calibration, horizontal calibrate, trigger calibration, amplitude calibration, clock accuracy and calibrate.Be specifically described respectively below:
Random calibration may further comprise the steps:
S101: import a bandwidth frequency sinusoidal signal;
S102: judge that the waveform that display screen shows has or not burr,, then carry out S103,, then carry out S104 if do not have if having;
S103: it is poor to adjust waveform phase, carries out S102 then;
S104: finish.
In specific operation process, the user can to regulate waveform phase poor by rotating value that omnipotent knob on the digital oscilloscope panel changes Move Num.
Rocking calibration in real time may further comprise the steps:
S201: import a high frequency sinusoidal signal;
S202: judge that the waveform that display screen shows has or not projection,, then carry out S203,, then carry out S206 if do not have if having;
S203: the bossing of waveform was moved to following one-period;
S204: the sampled point of removing boundary;
S205: the sampled point of removing is carried out interpolation, carry out S202 then;
S206: finish.
In specific operation process, the user can eliminate the projection of waveform by the value of rotating the omnipotent knob change Move Num on the digital oscilloscope panel.
Horizontal calibrate may further comprise the steps:
S301: import a sinusoidal signal;
S302: determine central point;
S303: judge whether central point is positioned at the display screen center, if, then carry out S305, if not, then carry out S304;
S304: adjust the distance at central point and display screen center, carry out S303 then;
S305: finish.
In specific operation process, the user can determine central point by the frequency that increases or reduce signal, adjusts the distance at central point and display screen center by increasing or reduce Coarse value and Fine value.
Triggering calibration may further comprise the steps:
S401: import a voltage signal;
S402: whether judge voltage signal greater than preset level, if, then carry out S403, if not, then carry out S405;
S403: the amplitude that increases preset level;
S404: judge whether to trigger, if, then carry out S405, if not, then carry out S402;
S405: finish.
In specific operation process, the user can find the triggering bound by the rotation level, calculate central point then, changing Center value and make central point just be in the triggering critical point, just begin to transfer scope delta after mixing up the center, is 6 lattice with the wave-shape amplitude increase, the level line is moved to the top of waveform, the determination range size greatly then increases delta value to waveform and triggers critical point, and the little delta that then reduces triggers critical point to waveform.
Amplitude calibration may further comprise the steps:
S501: import a voltage signal;
S502: judge the value of the voltage signal whether peak-to-peak value equals to import, if, then carry out S504, if not, then carry out S503;
S503: adjust voltage amplification factor, carry out S502 then;
S504: finish.
In specific operation process, the user can make the value of the voltage signal that peak-to-peak value equals to import by the value of regulating Range Zoom.
The clock accuracy calibration may further comprise the steps:
S601: import a standard signal;
S602: whether the reading of determination frequency meter equals the frequency of standard signal, if, then carry out S504, if not, then carry out S503;
S503: regulate the clock compensation parameter, carry out S502 then;
S504: finish.
In specific operation process, the user can change the reading of frequency meter by the value of regulating Clock Data, makes the frequency of its signal that infinitely is near the mark.
Above-mentioned method for calibrating digital oscilloscope does not need special calibration instrument, only needs to import a standard signal and adjust relevant parameters and can finish various calibration processes, and therefore, the calibration cost reduces greatly.And the user can adopt above-mentioned calibration steps calibration digital oscilloscope at any time, and therefore, the degree of stability of calibration result also can be guaranteed.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1, a kind of method for calibrating digital oscilloscope is characterized in that: comprising:
S1: import a standard signal;
S2: judge whether and need calibrate, if, carry out S3, if not, carry out S4;
S3: adjust relevant parameter, carry out S2 then;
S4: finish.
2, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described standard signal is the bandwidth frequency sinusoidal signal; It is described that to judge whether to calibrate be to judge that the waveform that display screen shows has or not burr; Described relevant parameter is that waveform phase is poor.
3, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described standard signal is the high frequency sinusoidal signal; It is described that to judge whether to calibrate be to judge that the waveform that display screen shows has or not projection; Described adjustment relevant parameter comprises moves the bossing of waveform to following one-period, removes the sampled point of boundary, and the sampled point of removing is carried out interpolation.
4, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described standard signal is a sinusoidal signal; It is described that to judge whether to calibrate be to judge whether central point is positioned at the display screen center; Described relevant parameter is the distance at central point and display screen center.
5, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described standard signal is a voltage signal; It is described that to judge whether to calibrate be to judge that whether voltage signal is greater than preset level; Described adjustment relevant parameter comprises the amplitude that increases preset level, judges whether to trigger, if, then carry out S4, if not, then carry out S2.
6, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described standard signal is a voltage signal; It is described that to judge whether to calibrate be the value of the voltage signal of judging whether peak-to-peak value equals to import; Described relevant parameter is a voltage amplification factor.
7, method for calibrating digital oscilloscope according to claim 1 is characterized in that: described to judge whether to calibrate be the frequency whether reading of determination frequency meter equals standard signal; Described relevant parameter is the clock compensation parameter.
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| CN200910108941A CN101655542A (en) | 2009-07-21 | 2009-07-21 | Method for calibrating digital oscilloscope |
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| CN200910108941A CN101655542A (en) | 2009-07-21 | 2009-07-21 | Method for calibrating digital oscilloscope |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980039A (en) * | 2010-09-29 | 2011-02-23 | 中国航天科工集团第二研究院二○三所 | Oscilloscope trigger calibration device for radio measuring and testing |
| CN102200572A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Instrument self-detecting system and instrument self-detecting method |
| CN102495387A (en) * | 2011-12-21 | 2012-06-13 | 北京航天测控技术有限公司 | Method for automatically calibrating direct current accuracy of digital oscilloscope on basis of binary search |
| CN103076588A (en) * | 2013-01-24 | 2013-05-01 | 福建利利普光电科技有限公司 | Closed-loop correction method of oscilloscope |
| CN103713272A (en) * | 2013-12-18 | 2014-04-09 | 上海斐讯数据通信技术有限公司 | Offset test method |
| CN104678338A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Digital oscilloscope, self checking method and automatic test system |
| CN104849684A (en) * | 2015-04-23 | 2015-08-19 | 深圳市鼎阳科技有限公司 | Oscilloscope, correcting unit, and method of automatically correcting horizontal center of oscilloscope |
| CN106501743A (en) * | 2016-12-07 | 2017-03-15 | 广州致远电子股份有限公司 | A kind of digital oscilloscope accuracy calibrating method and device |
| CN107095676A (en) * | 2017-04-13 | 2017-08-29 | 深圳市美好创亿医疗科技有限公司 | The method of testing and system of lung function instrument data processing accuracy |
| CN108983136A (en) * | 2018-07-05 | 2018-12-11 | 北京无线电计量测试研究所 | A kind of waveform calibration method and device |
-
2009
- 2009-07-21 CN CN200910108941A patent/CN101655542A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200572B (en) * | 2010-03-24 | 2014-04-23 | 鸿富锦精密工业（深圳）有限公司 | Instrument self-detecting system and instrument self-detecting method |
| CN102200572A (en) * | 2010-03-24 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Instrument self-detecting system and instrument self-detecting method |
| CN101980039A (en) * | 2010-09-29 | 2011-02-23 | 中国航天科工集团第二研究院二○三所 | Oscilloscope trigger calibration device for radio measuring and testing |
| CN102495387A (en) * | 2011-12-21 | 2012-06-13 | 北京航天测控技术有限公司 | Method for automatically calibrating direct current accuracy of digital oscilloscope on basis of binary search |
| CN103076588B (en) * | 2013-01-24 | 2015-04-15 | 福建利利普光电科技有限公司 | Closed-loop correction method of oscilloscope |
| CN103076588A (en) * | 2013-01-24 | 2013-05-01 | 福建利利普光电科技有限公司 | Closed-loop correction method of oscilloscope |
| CN103713272A (en) * | 2013-12-18 | 2014-04-09 | 上海斐讯数据通信技术有限公司 | Offset test method |
| CN104678338A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Digital oscilloscope, self checking method and automatic test system |
| CN104849684A (en) * | 2015-04-23 | 2015-08-19 | 深圳市鼎阳科技有限公司 | Oscilloscope, correcting unit, and method of automatically correcting horizontal center of oscilloscope |
| CN104849684B (en) * | 2015-04-23 | 2018-05-01 | 深圳市鼎阳科技有限公司 | A kind of method of oscillograph, means for correcting and its automatic horizontal correction center |
| CN106501743A (en) * | 2016-12-07 | 2017-03-15 | 广州致远电子股份有限公司 | A kind of digital oscilloscope accuracy calibrating method and device |
| CN106501743B (en) * | 2016-12-07 | 2019-04-19 | 广州致远电子股份有限公司 | A kind of digital oscilloscope accuracy calibrating method and device |
| CN107095676A (en) * | 2017-04-13 | 2017-08-29 | 深圳市美好创亿医疗科技有限公司 | The method of testing and system of lung function instrument data processing accuracy |
| CN108983136A (en) * | 2018-07-05 | 2018-12-11 | 北京无线电计量测试研究所 | A kind of waveform calibration method and device |
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Application publication date: 20100224 |