This Tektronix SJ300E SONET/SDH Jitter Analyzer is used and in excellent condition. Optical interface FC/PC. Firmware version 6.3.,Installed Options:• Opt. 04 - OC-1/3/12, STM-0/1/4 Optical• Opt. B3 - 12 kHz High-Pass Filter• Unit reports Options 12 and VE also Installed