Hi
I have a silly question. Are you sure the PDP8 is driving a RS323
levels or a current loop? I'm not so good at reading the DEC schematics
but it looks like current loop.
AS I understnad the problem, the PDP8/L does, indeed, have a current loop
interface, but the OP has got a current loop to RS232 itnerface that he
is trying to use with said PDP8/L
-tony