Rohde&Schwartz FSH-Z34 optical cable

[kazam]

Hi,

I just bought a used FSH3 and inconveniently enough is uses a proprietary optically coupled serial interface cable, FSH-Z34.

Anyone know where I can get one for cheap? There's one on eBay but it's expensive and shipping is outrageous.

I really only need it for a software update so I'm thinking about soldering directly on the LEDs with some resistors in series but don't know if I want to risk it.

/K