Kingst Virtual Instruments User Guide
www.qdkingst.com
2016-8-20
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Contents
I. Overview ............................................................................................................. 4
1、 Basic knowledge ................................................................................................................. 4
2、 Product series ...................................................................................................................... 4
3、 Technical specification ....................................................................................................... 5
II. Brief introduction to Kingst VIS .................................................................... 7
1、 How to install software ....................................................................................................... 7
2、 Brief introduction to GUI ................................................................................................... 7
3、 Language switch ................................................................................................................. 8
4、 Brief introduction to the demo function.............................................................................. 8
III. Connect the device ....................................................................................... 10
1、 Connect the device to PC .................................................................................................. 10
2、 Connect the device to system under test ........................................................................... 10
3、 Multipoint grounding to increase accuracy ....................................................................... 11
IV. Details of operations ...................................................................................... 12
1、 Sampling depth and sampling rate settings ....................................................................... 12
2、 Trigger condition settings ................................................................................................. 12
3、 Get the waveform ............................................................................................................. 13
4、 Waveform check and operations ....................................................................................... 14
5、 Waveform measurement ................................................................................................... 15
6、 Analyzers .......................................................................................................................... 16
7、 Channels settings .............................................................................................................. 18
8、 Save the settings and data ................................................................................................. 20
9、 Export the data .................................................................................................................. 20
10、 PWM generator ............................................................................................................... 21
V. Settings for standard protocols ..................................................................... 23
1、 UART/RS232/485 ............................................................................................................ 23
2、 I2C .................................................................................................................................... 24
3、 SPI .................................................................................................................................... 24
4、 CAN .................................................................................................................................. 25
5、 Simple Parallel .................................................................................................................. 26
6、 1-Wire ............................................................................................................................... 27
Kingst Virtual Instruments User Guide
www.qdkingst.com
2016-8-20
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7、 DMX-512 ......................................................................................................................... 27
8、 UNI/O ............................................................................................................................... 27
9、 User-defined protocol analyzer ......................................................................................... 27
VI. FAQs .............................................................................................................. 29
1、 Driver installation fail with the device connected to computer ........................................ 29
2、 Identification fail or work unstably with the device connected to the computer .............. 29
3、 Signal glitches appear on individual channels .................................................................. 29
4、 The actual sample time is less than expected when the depth is set to a large value ........ 29
5、 Auto update of the software fails ...................................................................................... 30
VII. Contact us ................................................................................................... 31
Kingst Virtual Instruments User Guide
www.qdkingst.com
2016-8-20
4
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,
Kingst Virtual Instruments User Guide
www.qdkingst.com
2016-8-20
5
the data will be sent to the computer at the same time. The PC software compresses and the data
and saves them in PC memories, and then it would restore the waveform and analyze it. As the data
needs to be sent to the computer and saved in real time, so the bandwidth is limited to the USB2.0
speed, that is, 480Mbps. As a result, when the device works with high sampling rate, only some of
the channels could be used. If you want to use all the channels, you have to reduce the sampling
rate. This series consists of LA1010 with with the highest sampling rate of 100M and LA1002, the
sampling rate of which is 24M.
3、 Technical specification
LAx016 Series：
Product type
LA1016
LA2016
LA5016
Input
Number of channels
16
16
16
Max sampling rate
100MHz
200MHz
500MHz
Measurement bandwidth
20MHz
40MHz
80MHz
Min detectable pulse width
20ns
12.5ns
6.25ns
Hardware storage size
1Gbits
1Gbits
1Gbits
Hardware sampling depth
50M/channel
50M/channel
50M/channel
Max compression depth
10G/channel
10G/channel
10G/channel
Input voltage range
-50V~+50V
-50V~+50V
-50V~+50V
Input impedance
220KΩ，12pF
220KΩ，12pF
220KΩ，12pF
Threshold voltage
Adjustable: -4~+4V
Min step: 0.01V
Adjustable: -4~+4V
Min step: 0.01V l
Adjustable: -4~+4V
Min step: 0.01V
PWM
Output
Number of channels
2
2
2
Output frequency range
0.1～20MHz
0.1～20MHz
0.1～20MHz
Min step of period
10ns
10ns
10ns
Min step of pulse width
5ns
5ns
5ns
Output voltage
+3.3V
+3.3V
+3.3V
Output impedance
50Ω
50Ω
50Ω
Power
supply
Power supply port
USB2.0/3.0
USB2.0/3.0
USB2.0/3.0
Standby current
130mA
150mA
200mA
Max active current
260mA
300mA
400mA
PC
software
Supported protocols
UART/RS-232/485, I2C, SPI, CAN, DMX512, HDMI CEC,
I2S/PCM, JTAG, LIN, Manchester, Midi, Modbus, 1-Wire, UNI/O,
SDIO, SMBus, SWD, USB1.1, PS/2, NEC Infrared, Parallel, etc.
Supported OS
Windows XP、Vista、Windows 7/8/10(32bit/64bit)
