... 36211 Portable Transmission Line and Antenna Analyzer can promptly measure the return lose, detect and accurately locate the fault point in ... ParametersStanding-wave ratio, return loss, cable loss, impedance and DTF (fault location)Effective Directivity>38dB (<4GHz), >32dB (4GHz~18GHz)Measuring ... In which, Vp is the transmission factor of device under test, F1 is the start frequency, and F2 is the ...