CN101436861B - Method for scaling picosecond stage time interval - Google Patents
Method for scaling picosecond stage time interval Download PDFInfo
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- CN101436861B CN101436861B CN2007101872144A CN200710187214A CN101436861B CN 101436861 B CN101436861 B CN 101436861B CN 2007101872144 A CN2007101872144 A CN 2007101872144A CN 200710187214 A CN200710187214 A CN 200710187214A CN 101436861 B CN101436861 B CN 101436861B
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Abstract
The invention discloses a picosecond class time interval calibration method. By adopting a microwave signal source A (1) with high accuracy and a microwave frequency multiplier (3), a millimeter wave continuous wave signal with normal period is acquired and picosecond class time base gears of a digital sampling oscilloscope (4) are calibrated; a double-channel impulse generator (5) is used to generate picosecond class time intervals; and finally, the digital sampling oscilloscope (4) is used to calibrate the picosecond class time intervals generated by the impulse generator. The method has the advantages that by the utilization of the prior general instrument and smart setting and combination, the problems of generating and calibrating the picosecond class time intervals are solved, the picosecond class time intervals are traced to the highest standard of the time frequency, namely the cesium atom frequency standard, the method for accurately calibrating the picosecond class time intervals which are as small as 1ps is realized, and the technological level of measuring the time intervals is improved.
Description
Technical field
The present invention relates to time interval calibrating method, particularly method for scaling picosecond stage time interval.
Background technology
Time interval calibrating method is to produce certain time interval with time interval generator or time synthesizer, and this time interval can be the relative delay between pulse duration or two paths of signals, with time-interval counter it is measured then.This method principle is simple, technology maturation, but no matter be to produce in the time interval or measure, its uncertainty all can only arrive about 1ns, can't satisfy growing demand of high speed measuring at all.The oscillographic measurement resolution of digital sampling can arrive picosecond magnitude, but accuracy of measurement is lower, can not be directly used in the time interval measurement of picosecond.
Summary of the invention
The object of the present invention is to provide a kind of method for scaling picosecond stage time interval, solve the difficult problem that picosecond stage time interval produces, calibrates.
Method for scaling picosecond stage time interval is realized by the picosecond stage time interval calibrating installation.Psec time interval calibrating installation comprises microwave signal source A, microwave signal source B, microwave multiplier, high steady Frequency Synthesizer, digital sampling oscilloscope, twin-channel pulse generator.
The implementation procedure of method for scaling picosecond stage time interval is: at first adopt the microwave signal source A of high accuracy to add the millimeter wave continuous wave signal that microwave multiplier obtains normal period, the base gear is calibrated during to the picosecond of digital sampling oscilloscope; Adopt twin-channel pulse generator to produce picosecond stage time interval then; With the digital sampling oscilloscope picosecond stage time interval that twin-channel pulse generator produces is calibrated at last.Concrete steps are:
A) output of microwave signal source A is connected to the input of microwave multiplier by microwave cable, the output of microwave multiplier is connected to the oscillographic input channel A of digital sampling by the Waveguide coaxial adapter, the output of microwave signal source B is connected to the oscillographic trigger port of digital sampling by microwave cable.
B) the synchronous output of microwave signal source A is connected to the synchronous input of microwave signal source B by the BNC cable, two microwave signal sources are synchronous, solve the stable triggering of the above signal of 70GHz, thereby effectively reduce shake.
C) by microwave multiplier the output signal frequency multiplication of microwave signal source A to 70GHz-75GHz, for the time base measure the correct time blank signal of resolving power less than 1ps be provided.It is picosecond that the oscillographic time base gear of digital sampling is set, the cycle of measuring the 70GHz-75GHz different frequency signals respectively by oscillographic dual cursors function.
D) time parameter of microwave signal source A, microwave signal source B is traceable to cesium atomic frequency standard.
E) output channel A, output channel B, the triggering output with twin-channel pulse generator is connected to the oscillographic input channel A of digital sampling, input channel B, trigger port by microwave cable respectively, realizes the triggering synchronous that pulse produces and measures.
F) clock of the steady Frequency Synthesizer of height is exported the outer clock input that is connected to twin-channel pulse generator by the BNC cable, it is outer clock pattern that twin-channel pulse generator is set, improve the clock stability of twin-channel pulse generator, reduce clock jitter, thereby improve the stability of output pulse, reduce delay time error.
G) the two-way pulse output amount of delay that twin-channel pulse generator is set is 0ps, it is picosecond that the oscillographic time base gear of digital sampling is set, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, determine the inaccurate error of introducing in order to reduce the pulse front edge mid point, the oscillographic vertical gear of digital sampling is set to the millivolt level, get the multiple averaging measurement result, measured value is the inherent delay of twin-channel pulse generator.
H) utilize Deskew (bias correcting) function of twin-channel pulse generator, eliminate the inherent delay between its two-way pulse output.
I) the two-way pulse output amount of delay that twin-channel pulse generator is set is 1ps, it is picosecond that the oscillographic time base gear of digital sampling is set, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the oscillographic vertical gear of digital sampling is set to the millivolt level, get the multiple averaging measurement result, measured value is the accurate scaled values of 1ps as the amount of delay value of setting.
J) press the stepping amount of 1ps, the two-way pulse output amount of delay that twin-channel pulse generator is set is respectively 2ps, 3ps, 4ps, 5ps......, it is picosecond that the oscillographic time base gear of digital sampling is set, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the oscillographic vertical gear of digital sampling is set to the millivolt level, get the multiple averaging measurement result, measured value is as 2ps, 3ps, 4ps, the scaled values in the 5ps...... time interval.
The advantage of this method is to utilize existing instrument, be provided with cleverly and make up by some, solved the difficult problem of picosecond stage time interval generation, calibration, picosecond stage time interval has been traceable to the highest standard cesium atomic frequency standard of temporal frequency, realized the accurate calibrating method of little picosecond stage time interval, improved the level of time interval measurement technology to 1ps.
Description of drawings
The picosecond stage time interval calibrating installation schematic diagram of Fig. 1 method for scaling picosecond stage time interval.
1. twin-channel pulse generator 6. high steady Frequency Synthesizers of microwave signal source A 2. microwave signal source B 3. microwave multipliers 4. digital sampling oscilloscopes 5.
Embodiment
Method for scaling picosecond stage time interval is realized by the picosecond stage time interval calibrating installation.The picosecond stage time interval calibrating installation comprises microwave signal source A1, microwave signal source B2, microwave multiplier 3, digital sampling oscilloscope 4, twin-channel pulse generator 5, high steady Frequency Synthesizer 6.
The implementation procedure of method for scaling picosecond stage time interval is: at first adopt the microwave signal source A of high accuracy to add the millimeter wave continuous wave signal that microwave multiplier obtains normal period, the base gear is calibrated during to the picosecond of digital sampling oscilloscope; Adopt twin-channel pulse generator 5 to produce picosecond stage time interval then; With the digital sampling oscilloscope picosecond stage time interval that twin-channel pulse generator 5 produces is calibrated at last.Concrete steps are:
A) output of microwave signal source A1 is connected to the input of microwave multiplier 3 by microwave cable, the output of microwave multiplier is connected to the oscillographic input channel A of digital sampling by the Waveguide coaxial adapter, the output of microwave signal source B2 is connected to the trigger port of digital sampling oscilloscope 4 by microwave cable.
B) the clock synchronization output of microwave signal source A1 is imported by the clock synchronization that the BNC cable is connected to microwave signal source B2, two microwave signal sources are synchronous, the stable triggering that solves the above signal of 70GHz.
C) by frequency multiplier the output signal of microwave signal source A 1 difference frequency multiplication is arrived 70GHz, 71GHz, the cycle of 70GHz signal is 14.2857ps, the cycle of 71GHz signal is 14.0845ps, and the two differs 0.2ps, and resolving power is provided is the correct time blank signal of 0.2ps for time base is measured.The time basic gear that digital sampling oscilloscope 4 is set is 2ps/div, measures the cycle of 70GHz, 71GHz signal respectively by oscillographic dual cursors function.The time-base accuracy of calibration back digital sampling oscilloscope 4 is better than 1ps.
D) time parameter of microwave signal source A1, microwave signal source B2 is traceable to cesium atomic frequency standard.
E) with output channel A, the output channel B of twin-channel pulse generator 5, triggering output is connected to digital sampling oscilloscope 4 respectively by microwave cable input channel A, input channel B, trigger port, realize the triggering synchronous that pulse produces and measures.
F) clock of the steady Frequency Synthesizer 6 of height is exported the outer clock input that is connected to twin-channel pulse generator 5 by the BNC cable, twin-channel pulse generator 5 is set is outer clock pattern.
G) the two-way pulse output amount of delay that twin-channel pulse generator 5 is set is 0ps, the time basic gear that digital sampling oscilloscope 4 is set is 2ps/div, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the oscillographic vertical gear of digital sampling is set to 1mV/div, get the average measurement result 256 times, measured value is the inherent delay of twin-channel pulse generator 5.
H) utilize the Deskew function (bias correcting) of twin-channel pulse generator 5, eliminate the inherent delay between its two-way pulse output.
I) the two-way pulse output amount of delay that twin-channel pulse generator 5 is set is 1ps, the time basic gear that digital sampling oscilloscope 4 is set is 2ps/div, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the oscillographic vertical gear of digital sampling is set to 1mV/div, get the average measurement result 256 times, measured value is the accurate scaled values of 1ps as the amount of delay value of setting.
Press the stepping amount of 1ps, the two-way pulse output amount of delay that twin-channel pulse generator 5 is set is respectively 2ps, 3ps, 4ps, 5ps......, the time basic gear that digital sampling oscilloscope 4 is set is 2ps/div, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the vertical gear of digital sampling oscilloscope 4 is set to 1mV/div, get the average measurement result 256 times, measured value is as 2ps, 3ps, 4ps, the scaled values in the 5ps...... time interval.
Claims (1)
1. a method for scaling picosecond stage time interval is characterized in that this method realizes by the picosecond stage time interval calibrating installation; The picosecond stage time interval calibrating installation comprises microwave signal source A (1), microwave signal source B (2), microwave multiplier (3), digital sampling oscilloscope (4), twin-channel pulse generator (5), high steady Frequency Synthesizer (6); At first adopt the microwave signal source A (1) of high accuracy to add the millimeter wave continuous wave signal that microwave multiplier (3) obtains normal period, the base gear is calibrated during to the picosecond of digital sampling oscilloscope (4); Adopt twin-channel pulse generator (5) to produce picosecond stage time interval then; Use digital sampling oscilloscope (4) that the picosecond stage time interval that twin-channel pulse generator (5) produces is calibrated at last; Concrete steps are:
The output of microwave signal source A (1) is connected to the input of microwave multiplier (3) by microwave cable, the output of microwave multiplier (3) is connected to the input channel A of digital sampling oscilloscope (4) by the Waveguide coaxial adapter, the output of microwave signal source B (2) is connected to the trigger port of digital sampling oscilloscope (4) by microwave cable;
The synchronous output of microwave signal source A (1) is connected to the synchronous input of microwave signal source B (2) by the BNC cable, two microwave signal sources are synchronous, solve the stable triggering of the above signal of 70GHz, thereby effectively reduce shake;
By microwave multiplier (3) the output signal frequency multiplication of microwave signal source A (1) to 70GHz-75GHz, for the time base measure the correct time blank signal of resolving power less than 1ps be provided; The time base gear that digital sampling oscilloscope (4) is set is a picosecond, the cycle of measuring the 70GHz-75GHz different frequency signals respectively by the dual cursors function of digital sampling oscilloscope (4);
The time parameter of microwave signal source A (1), microwave signal source B (2) is traceable to cesium atomic frequency standard;
With output channel A, the output channel B of twin-channel pulse generator (5), triggering output is connected to digital sampling oscilloscope (4) respectively by microwave cable input channel A, input channel B, trigger port, realize the triggering synchronous that pulse produces and measures;
The clock output of the steady Frequency Synthesizer of height (6) is connected to the outer clock input of twin-channel pulse generator (5) by the BNC cable, twin-channel pulse generator (5) is set is outer clock pattern, improve the clock stability of twin-channel pulse generator (5), reduce clock jitter, thereby improve the stability of output pulse, reduce delay time error;
The two-way pulse output amount of delay that twin-channel pulse generator (5) is set is 0ps, the time basic gear that digital sampling oscilloscope (4) is set is a picosecond, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, determine the inaccurate error of introducing in order to reduce the pulse front edge mid point, the vertical gear of digital sampling oscilloscope (4) is set to the millivolt level, get the multiple averaging measurement result, measured value is the inherent delay of twin-channel pulse generator (5);
Utilize Deskew (bias correcting) function of twin-channel pulse generator (5), eliminate the inherent delay between its two-way pulse output;
The two-way pulse output amount of delay that twin-channel pulse generator (5) is set is 1ps, the time basic gear that digital sampling oscilloscope (4) is set is a picosecond, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the vertical gear of digital sampling oscilloscope (4) is set to the millivolt level, get the multiple averaging measurement result, measured value is the accurate scaled values of 1ps as the amount of delay value of setting;
Press the stepping amount of 1ps, the two-way pulse output amount of delay that twin-channel pulse generator (5) is set is respectively 2ps, 3ps, 4ps, 5ps......, the time basic gear that digital sampling oscilloscope (4) is set is a picosecond, measure the delay inequality of two-way pulse front edge mid point with the dual cursors method, the vertical gear of digital sampling oscilloscope (4) is set to the millivolt level, get the multiple averaging measurement result, measured value is as 2ps, 3ps, 4ps, the scaled values in the 5ps...... time interval.
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Citations (4)
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|---|---|---|---|---|
| US4899117A (en) * | 1987-12-24 | 1990-02-06 | The United States Of America As Represented By The Secretary Of The Army | High accuracy frequency standard and clock system |
| JP2652971B2 (en) * | 1990-02-28 | 1997-09-10 | 日本電気株式会社 | Cesium atomic oscillator |
| CN2762439Y (en) * | 2004-11-30 | 2006-03-01 | 中国科学院武汉物理与数学研究所 | Passive atomic frequency standard of long, short and stabilization |
| CN1822017A (en) * | 2006-03-31 | 2006-08-23 | 北京飞天诚信科技有限公司 | Real time clock correcting method in soft ware protecter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4899117A (en) * | 1987-12-24 | 1990-02-06 | The United States Of America As Represented By The Secretary Of The Army | High accuracy frequency standard and clock system |
| JP2652971B2 (en) * | 1990-02-28 | 1997-09-10 | 日本電気株式会社 | Cesium atomic oscillator |
| CN2762439Y (en) * | 2004-11-30 | 2006-03-01 | 中国科学院武汉物理与数学研究所 | Passive atomic frequency standard of long, short and stabilization |
| CN1822017A (en) * | 2006-03-31 | 2006-08-23 | 北京飞天诚信科技有限公司 | Real time clock correcting method in soft ware protecter |
Non-Patent Citations (2)
| Title |
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| 苏水金,等.宽带取样示波器一种新校准方法研究.《宇航计测技术》.2006,第26卷(第1期),第6-11页. |
| 苏水金等.宽带取样示波器一种新校准方法研究.《宇航计测技术》.2006,第26卷(第1期),第6-11页. * |
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