Amplitude value and phase alignment method of high bandwidth oscilloscope

A phase calibration and oscilloscope technology, applied in the field of calibration, can solve problems such as test result errors, and achieve the effect of simple verification method and strict control of the test process

Active Publication Date: 2012-09-19
苏州赛克安信息技术有限公司
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  • Abstract
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Problems solved by technology

[0012] If there is still a phase difference between the channels after calibration, then the user will continue to test, which will cause all test results to be wrong

Method used

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  • Amplitude value and phase alignment method of high bandwidth oscilloscope
  • Amplitude value and phase alignment method of high bandwidth oscilloscope
  • Amplitude value and phase alignment method of high bandwidth oscilloscope

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0042] Such as figure 1 Shown, the concrete method step of the inventive method is as follows:

[0043] (1) Select a channel to be calibrated and the corresponding probe, and connect the probe to the detection point of the calibration fixture.

[0044] (2) According to the steps of the amplitude calibration method, first calibrate the amplitude of the channel until it prompts that the amplitude calibration is successful.

[0045] (3) According to the steps of the phase...

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Abstract

The invention discloses an amplitude value and phase alignment method of a high bandwidth oscilloscope. The method comprises the following steps of: determining channels to be calibrated to be respectively a channel 1, a channel2,...... a channel N, wherein the N is greater than or equal to 2; selecting the channel to be calibrated and corresponding probe, and collecting the probe to a detection point of a calibration clamping apparatus; calibrating the amplitude value and phase of the channel; repeating the step (1) and the step (2), and finishing the amplitude value and the phase alignment of the channel to be calibrated; verifying whether the amplitude value of each channel to be calibrated is success, if not, and calibrating the amplitude value again; and verifying whether the amplitude value of each channel to be calibrated is success, if not, and calibrating the phase again.

Description

technical field [0001] The invention relates to a calibration method, in particular to an amplitude and phase calibration method of a high-bandwidth oscilloscope. Background technique [0002] Due to the testing requirements of different interfaces, more and more probes of different types of oscilloscopes, such as single-ended probes and differential probes, are connected to the oscilloscope to perform tests of different functions. In order to ensure the test accuracy and test accuracy, it is necessary to verify the amplitude and timing of the oscilloscope channel itself and the probe respectively. [0003] Amplitude verification is to ensure that the signal amplitude does not attenuate after the oscilloscope probe collects the signal. The usual practice in the industry is that the calibration fixture of the oscilloscope outputs a calibration voltage with a fixed amplitude, and then the oscilloscope probe is connected to the output point of the calibration voltage. Alignme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 吴少刚张福新姜勋张斌王振兴
Owner 苏州赛克安信息技术有限公司
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