Whether you want to inspect signals at physical level or perform a loopback, this accessory ensures SpaceWire cable-like* transfer almost zero-cost. *though opposite polarity of the connector; suitable for interconnecting 2 SpW high speed USB testing devices or provide opposite polarity to plug your spacewire cable. Pictures show test pins (GND, Data in-out / Strobe in-out +/- all accessible via tets points or pad). Some pictures also describe the use case with the single USB to SpaceWire test equipment (BCAI-UHSS) also available on this website.