Multi-channel digital oscilloscope and signal synchronization method thereof

Abstract

The invention discloses a multi-channel digital oscilloscope and a signal synchronization method thereof. The multi-channel digital oscilloscope comprises a plurality of controllers, and each controller controls at least an acquisition channel. The method comprises the following steps: each controller generates a rectification signal with a trigger edge simultaneously and inputs the rectification signal into at least an acquisition channel controlled by the controller; an actual position of a trigger point of the rectification signal at each acquisition channel is determined, and according to the actual position of the trigger point, a theoretic offset sampling point number of each acquisition channel is obtained; according to the theoretic offset sampling point number of the acquisition channel, an actual sampling point number needed in offset of each acquisition channel in displaying a waveform is obtained; each acquisition channel sends a waveform offset actual sampling point number needed to be displayed to a display unit to carry out waveform display. Compared with the prior art, by utilizing the method in the invention, a problem that a multi-channel signal has phase difference is effectively solved, and synchronization of digital oscilloscope multi-channel signal display is realized.

Description

technical field [0001] The invention belongs to the technical field of digital oscilloscopes, and in particular relates to a multi-channel digital oscilloscope and a signal synchronization method thereof. Background technique [0002] A digital oscilloscope is an instrument that visually displays the waveform of a signal changing with time, and is a comprehensive signal characteristic tester. [0003] With the development of digital oscilloscopes, the bandwidth is getting higher and higher, and there are more and more acquisition channels, but multiple channels bring synchronization problems between each channel. When each channel of the digital oscilloscope acquires waveforms, it must be synchronized, and there should be no delay difference between each channel. In a digital oscilloscope with multiple channels, it is necessary to have multiple controllers to control these channels, and the trigger signal is generated and processed on one of the controllers, and the samplin...

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a multi-channel digital oscilloscope and its signal synchronization method, which solves the problem of delay difference between the multi-acquisition channels of the digital oscilloscope

Images