The Hewlett-Packard 82163A video interface is an HP-IL device that can output 32 characters by 16 lines to a composite video or RF output.
It was originally designed to be used with HP-41 calculators, but later HP-IL capable computers, such as the HP-75 and HP-71 can also use it.
The 82163A was made for the US market and outputs NTSC (525 lines at 60Hz), whereas the 82163B was made for the European market and outputs PAL (625 lines at 50Hz).
- HP 82163 Video Interface Owner's Manual (PDF, 730kB)
- HPIL Video Interface 82163A vs. B — a forum thread detailing the differences between the A and B units, as well as instructions for converting one into the other and vice versa.