Double-time base digital storage oscillograph

Abstract

The invention discloses a dual time base digital storage oscilloscope comprising a microprocessor, an ADC conversion module, a master time base programmable data check point controller and a slave time base programmable data check point controller; an acquisition controller and a trigger event management controller generate writeable signals and readable signals with lower or higher frequency, thestorage of a master time base waveform data memory and a slave time base waveform data memory is controlled, waveform data with lower or higher sampling rate can be obtained, the waveform data is displayed in a window by the processing of the microprocessor after the completion of the master and the slave time base waveform data acquisition; in addition, the dual time base digital storage oscilloscope further comprises a trigger module, the trigger event management controller and a gate circuit for generating the master and the slave trigger signals and controlling the data acquisition. The dual time base digital storage oscilloscope combines the check point controller and the memory, the dual time base waveform data acquisition is realized through the control of the reading and the writing modes of the controller without the need of an independent data extractor, the circuit is relatively simple and the cost is low.

Description

technical field [0001] The invention relates to a digital storage oscilloscope, in particular to a dual time base oscilloscope digital storage oscilloscope Background technique [0002] Most oscilloscopes now have only one time base. Due to the limitation of storage depth, the ability to capture glitches is very limited. Even if it can be captured, it only describes the signal from a microscopic perspective, but it cannot describe the details of the signal from both a macroscopic and a microscopic perspective. , sometimes we just need this kind of comparison, because only comparison can explain the problem well. For example, it is more convenient to use a dual-time base digital storage oscilloscope to describe the carrier wave and modulating wave. [0003] In addition, in many applications for observing complex signal waveforms, it is often necessary to display a small part of a waveform and make it occupy the entire screen. A typical example of this situation is to observe...

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Problems solved by technology

[0011] However, the dual-time-base digital storage oscilloscopes in the prior art all need to have two extractors to extract and output high-resolution enlarged records and low-resolution summary records from the high-speed data stream output by the A / D converter, and then store In memory, the circuit is complicated and the cost is high

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