This is just a reminder that the .EXE files are not all DOS
executable files. UHFA.EXE is indeed a DOS file. But, due to the
choice of file extensions by Analog Devices, the file UHF3.EXE is
a DSP machine language file that must be loaded by any of a number
of programs, such as the Analog Devices Windows loader or
Dwight Elvey's EZFAST (ver 1.03 or later).

In my experience, if you type "UHF3 <enter>" DOS will hang
and you will need to reboot!

W7PUA