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| A Novel Digitizing Measurement Method for Large Trigger Delay of Digital Oscilloscopes |
| LIANG Zhi-guo |
| National Key Laboratory of Science and Technology on Metrology & Calibration, Changcheng Institute of Metrology and Measurement, Beijing 100095, China |
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Abstract Aiming at the large trigger delay of digital oscilloscope, a novel digitizing measurement method is presented. By using the period of sinusoidal as standard, the large trigger delay is divided into two parts, one part is just consist of many periods of sine wave, another part include the partial period of sine wave. The partial period part can be measured through phase difference method, and to the integer periods part, first, one can divided the large trigger delay into many smaller trigger delay increment, through measuring each smaller trigger delay increment directly, then the cumulative results is gotten. Its the rude result of large trigger delay that can be used to calculate the integer. Finally, through composing of the two parts, the large trigger delay is gotten. The correctness and feasibility are proved by some experiments on digital oscilloscope, the method can be used to the measurement and calibration of large trigger delay of digital oscilloscopes.
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Received: 08 October 2016
Published: 29 December 2017
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2018, Vol. 39 
