Hello,
i got an Advantest TR9403 Digital Spectrum analyzer TR9403 (same as Takeda Riken TR9405) with separate Signal Generator TR98201 and separate Floppy TR98102. These have to be conmnected with a 50 pin centronics cable. So far so good. It ist written in the uswer manual, that it is nessesary to terminate the bus with a special Terminator. Both units do not respond without a termination, and i have no idea how to build one. Generator and Floppy have two centronics ports...."in and out". The FFT analyzer itself is also terminated inside. It seems that some of the pins have to be "pulled up" to +5 V With pull up resistors also, but this is only an expectation. (viewed with a scope) I need the pinout for this interface.
regards Andreas