I. Overview
1、 Basic knowledge
Logic analyzer is the instrument that collects and displays the digital signal from the devices
under test. It is mainly used for timing judgement an analysis. Unlike the oscilloscope with many
voltage grades, It has only two grades(Logic one and Logic zero). .After the reference voltage is set,
the logic analyzer could decide from the test signal that the signal above the reference voltage is
logic one, and the signal below is logic zero. The digital waveform is formed with 1 and 0.
Compared with the oscilloscope, when testing and measuring the digital systems like MCU, ARM,
FPGA and DSP, the logic analyzer could provide better accuracy, much more data and more
complicated measuring methods.
For example, if you are sampling a signal with the logic analyzer, the sample rate of which is
1Mhz, and the reference voltage(Threshold voltage) is set to 1.5V, the logic analyzer would
compare the current voltage with 1.5V. The signal above 1.5V would be high level(logic 1), and the
signal below 1.5V would be low level(logic 0). Thus we get a sample point, and then we could link
all these points(logic 1 and logic 0) to get a waveform, in which the user could see and analyze the
timing of the signal, logic errors and the relation between each other.
The figure below shows how the logic analyzer samples the signal:
2、 Product series
Kingst logic analyzer product family consists of two series: the LAx016 series with sampling
memory and LA1000 series without sampling memory.
LAx016 series is integrated with large-capacity memories. The sampled data would be saved
in the internal memory while the device is sampling the signal. After the sampling process the data
would be sent to the computer, and it would be restored back to original waveform and analyzed.
As the sampling memory could offer the sampling bandwidth that is extremely high, so the device
could sample all the channels in high sampling rate. This series consists of LA5016 with the
highest sampling rate of 500M, LA2016 with the sampling rate of 200M and LA1016, the sampling
rate of which is 100M.
Sampling memory doesn’t exist in LA1000 series. When the device is sampling the signals,
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