I've recently tried to use a pair of old 37203A HP-IB Extenders to extend the distance of several IEEE-488 instruments from the controller.? I don't have a manual on hand, but I thought the units should be fairly straightforward to use.? I set the "controller end" as Master and the "instrument end" of the link as "Slave," the rates at the same setting (Normal), and connected the power and -488 instruments.? Although I can see a series of negative-going pulses on the coaxial interconnecting cable, I can't seem to get communications between the controller and the instruments.? The length of the cable is about 150 meters.
Can anyone give me any guidance for their operation?? There are a few "mystery switches" inside the units along with a jumper printed wiring board -- I left all these as they were.? Any help would be sincerely appreciated.
Regards -- Tom Leedy
