A.0.1≤f≤1MHz B.1≤f≤16MHz C.1≤f<≤100MHz D.14≤f≤250MHz
A.5V(r.m.s) B.3V(r.m.s) C.2V(r.m.s) D.1V(r.m.s)
A.5V/m B.3V/m C.2V/m D.1V/m