A Hybrid Oscilloscope with Noise Suppression Function

Abstract

The invention provides a hybrid oscilloscope with noise suppression function, comprising: a digital sampling unit, which is used to digitally process and sample multiple channels of measured signals on a parallel digital bus to obtain multiple digital signal data; the setting unit is used to To set the noise suppression time; the bus decoding unit is used to detect whether the current bus state changes according to the multi-channel digital signal data, and judge whether the previous bus state is stable according to the duration of the previous bus state and the noise suppression time, and if so, the The previous bus state is recorded as a stable state, and the digital signal data of the stable state is output according to the duration of the stable state; if not, the digital signal data of the stable state is output according to the duration of the previous bus state; the output digital signal data Display according to the specified format. The present invention eliminates the unstable state as noise, so that the decoding result is consistent with the actual source data.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a hybrid oscilloscope with noise suppression function. Background technique [0002] Mixed-signal oscilloscopes, also known as mixed-signal oscilloscopes (MSO, Mixed-signal Oscilloscopes), are an oscilloscope that can observe both analog and digital signals. It is used in system debugging where digital signals and analog signals coexist. The hybrid oscilloscope can observe the measured signals on multiple parallel digital buses at the same time. The parallel digital bus is equivalent to multiple digital channels, which usually include a clock line and multiple data lines. The clock line can be regarded as a clock channel for transmitting clock signals. Each data line is a data channel, and the measured signal in the data channel has only two states of "1" and "0", which is convenient for comparative analysis. [0003] The measured signal in the data channel should n...

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Problems solved by technology

[0008] In addition, the data changes of the measured signals in multiple data channels may not occur at the same time, even if the data changes of the original measured signals occur at the same time, due to the cable difference of the probe 103, the signal collected by the probe 103 Data changes may not be at the same moment

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