The PAC 91 is an optically isolated serial to parallel converter / print adapter cable for use with Fluke test tools that have an optical interface connector. Standard, 25-pin connector for Centronics printer cable. Battery-powered for field use. Auto power-off mode helps conserve batteries. "Busy" and "Power" indicator LED's. 9600 baud communication speed keeps up with fast printers. Optical input: optical RS-232, 9600 baud, 8 bits, no parity, 1 stop bit, Xon/Xoff handshake. Output: Centronics (TTL levels,), 8 bit parallel with handshake. DB-25 female connector. Battery: Alkaline 9V, IEC 6LR61 (NEDA 1604). Battery lifetime >20 hrs. at room temperature. Power switch setting: Off / Auto off / On. "Auto off" mode gives auto power-down 5 minutes after last data transfer. Cable length: 30cm. Environmental: temperature range 0 to 50 degree C (operating), -40 to 70 degree C (storage). Warranty: 1 year. Supported instruments: ScopeMeter test tools, power harmonics analyzers and graphical multimeters.