Vi. Faqs - Kingst LA1016 User Manual

Kingst Virtual Instruments User Guide
1、 Driver installation fail with the device connected to computer
First, Kingst VIS should have been installed before connecting the device to computer. If the
software has not been installed, the OS could not find the driver, so the installation would fail. And
it would be a good idea to install the software without the hardware connected to the computer.
Second, the device driver is installed automatically by installation program during installing
process. If the driver installation is blocked unintentionally during installation process, or it is not
installed correctly due to other reasons, when you connect the device for the first time, the driver
installation would fail too. In this case, you can find the unknown hardware devices in the device
manager, click the right button to install the driver program again. Please select manual installation.
The driver program is located in "installation directory\Drivers", and select the right directory
based on your operating system.
2、 Identification fail or work unstably with the device connected to the
computer
When the logic analyzer works at full speed, there would be a lot of the current consumed
(maybe more than 500mA). So if the USB port of the computer can not supply sufficient power, the
device could be identified incorrectly or work unstably. To solve this, the laptop users could try to
switch to the USB port on the other side, and the desktop users must use the USB port behind the
tower box. If the USB-HUB is being used, please connect the device USB port directly.
3、 Signal glitches appear on individual channels
There are two cases when signal glitches appear: the unused channels are floating, or several
signals with high speed are sampled simultaneously.
It is normal that the glitch appears on unused channels, this is because the floating channel
wire is like an antenna, and it will transmit weak and alternating signal, and this would result in
glitches. We could hide such channels, or keep them and the signal channels at a longer distance.
And we should check the grounding of the logic analyzer and the system under test.
And for the glitches which appear when measuring multiple channels with high speed, the
reason for that has been explained in the section "Multipoint grounding to increase accuracy", and
the method to handle this is multipoint grounding
4、 The actual sample time is less than expected when the depth is set to a
large value
The logic analyzer is designed with a large-sized memory, to store the sample data temporarily.
And through compression algorithm the depth is further extended. With this compression algorithm,

VI. FAQs

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www.qdkingst.com
2016-8-20