Can I easily monitor a DX's measured values on a PC without special software?

Yes, by using the Web server display function. After connecting to the network via Ethernet, you can type the DX's URL into a web browser on the PC (Internet Explorer, etc.) and view the screen that is currently displayed on the DX in the web browser. However, you cannot save the data on the PC, nor monitor data in real time (there is a function that updates the screen about once every 30 seconds).