GW Instek PEL-2000A Series - Page 241

OPERATION
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GW Instek,PEL-2000A,00000001, V108\n
Note
The COM port corresponding to the USB CDC will
exist until the USB driver is well installed. If you want
to do the USB CDC function check, the VISA resource
name should be changed to the COM port which is
occupied by the USB CDC protocol as a virtual com
port in your system.