Anritsu S331A SiteMaster, 25 to 3300 MHz, Cable/Antenna Analyzer. Site Master is the instrument of choice for transmission line/antenna installation and maintenance. It is the best way to reduce maintenance expenses and improve quality. It replaces stacks of heavy, expensive, and complex test equipment. Site Masters frequency domain reflectometry technique allows it to find problems before they become catastrophic faults, thereby creating a huge cost savings.