Site Master Handheld Cable and Antenna Analyzer Model S331D covering the 25 MHz to 4000 MHz spectrum is the de facto industry standard for installing, provisioning, maintaining, and troubleshooting wireless base station cable and antenna systems. Option 2 and Option 16 extend the lower and upper frequency ranges to 2 MHz and 6 GHz respectively. Accurate, versatile, affordable, rugged and a true handheld at under 5 pounds (including battery), Site Master is ideally suited for field technicians of any experience level working with VHF, broadcasting, paging, cellular, PCS/GSM, 3G, ISM, WLAN and WLL applications.