A cd with drivers is included with this adapter cable, but if you are unable to use that you can get the driver at this link:
https://www.ftdichip.com/Drivers/VCP.htm
USB to null modem RS232 adapter
Fluke Part Number: 2675479
Description: (884X-USB) USB TO RS232 CABLE ADAPTER (Null modem)
https://www.ftdichip.com/Drivers/VCP.htm
USB to null modem RS232 adapter
Fluke Part Number: 2675479
Description: (884X-USB) USB TO RS232 CABLE ADAPTER (Null modem)


Is there any explanation of why all 884X they can not operate at any Boud Rate higher than 9600, even with direct RC-232 cable ?
I have test Fluke software, Tektronix software, and all failed.