Computer Logic Analyzer

Computer Logic Analyzer

It is an instrument that uses a clock to collect and display digital signals from testing equipment, mainly used for timing determination. Due to the fact that logic analyzers do not have many voltage levels like oscilloscopes, they usually only display two voltages (logic 1 and 0). Therefore, after setting a reference voltage, the logic analyzer will judge the measured signal through a comparator, with those higher than the reference voltage being High and those lower than the reference voltage being Low

Computer Logic Analyzer

The working process of a logic analyzer is the process of data acquisition, storage, triggering, and display. Due to its use of digital storage technology, data acquisition and display can be carried out separately or simultaneously. If necessary, the stored data can be repeatedly displayed to facilitate problem analysis and research.
Connect the tested system to a logic analyzer, and use the probe of the logic analyzer (the probe of the logic analyzer concentrates several probes, with small pins for detecting high-density integrated circuits) to monitor the data stream of the tested system, forming parallel data and sending it to the comparator. The input signal is compared with the externally set threshold level in the comparator. The signal greater than the threshold level is output as a high level on the corresponding line, and the input waveform is shaped when it outputs a low level. After comparison and shaping, the signal is sent to the sampler for sampling under clock pulse control. The sampled signals are stored in memory in order. The sampling information is organized in the memory according to the principle of "first in, first out". After receiving the display command, the information is read out one by one in order, and the measured display is performed according to the set display mode.

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