Special Features
Third echelon test system (tets) radio frequency (rf) a variant 2, an/usm-657 (v)2, portable automated testing unit providing capability to screen, test, and diagnose rf and electronic line replaceable units and circuit card assemblies; an/usm-657a(v) 2 portability provides deployable maintenance support and capabilities as far forward as possible; includes equipment that provides testing capabilities for weapon systems including radios and radars
