The answer is affirmative! I bought a second-hand 34 pin floppy disk emulator in China based on some tips from this forum. It is very cheap, including shipping, and it is less than $5. Then I modified it myself into a 26 pin flexible ribbon cable interface and successfully installed it on my TDS3000 and TDS3000B oscilloscopes. They both worked very well, but I am not satisfied yet and want to build a real USB platform on the oscilloscope. Please refer to the following link for details:https://www.eevblog.com/forum/testgear/the-possibility-of-installing-usb-platform-on-tds3000-oscilloscope/msg5660293/#msg5660293