1 km, GPIB Bus Extender—The GPIB-140A can extend the cable length of a GPIB system up to one kilometer without compromising the integrity of the GPIB or requiring software modifications. The accessory uses a buffered transfer technique to transfer data at rates up to 1.1 Mb/s (IEEE 488.1) or 2.8 Mb/s (HS488). The GPIB-140A also expands the maximum number of GPIB devices in a GPIB system from 15 up to 26.