There is no need for a VISA driver of any kind. The Hantek 1833 is an STM bootloader.
Install the STM Cube Programmer software (to get the latest drivers).
Next, plug the Hantek into USB, the device manager should show it as a COM device. This COM of 188x is apparenty 2400 baud, not 9600.
Next, power up the Hantek into DFU mode (upper left key + power, hold until the beep, release and the bottom right button cycles red/green). The COM device should go away, an STM DFU device should show up under USB section.
From here, I use dfu-util 0.9 to flash firmware to the device. Hantek writes firmware in the DfuSE format, but that's ok becaise dfu-util can read those files a-ok.
Using dfu-util (many times named "dfu-util-static.exe" you do a "dfu-util-static.exe --list" and you should see 3 devices with same serial number.
Next, I rename any downloaded firmware to "hantek.dfu" just for ease-of-use.
Flash the firmware to the device "dfu-util-static.exe -a 0 -D ./hantek.dfu"
Disconnect device from USB, it now has the firmware you just flashed to it.
Where is the actual latest firmware from Hantek for the 1833?
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I still do not understand how the 1833C works, why does the Rs or Rp have a frequency associated with it? How do you measure Rdc ?