A time diversity carrier signal sampler utilizes a shift register [Figs. 6, 7 (70); Fig 8 (170)] in conjunction with a timer (190) and a plurality of phase samples [Fig. 7 (61, 62, 63); Fig. 8 (196, 197, 198)]. The instantaneous logic level of each phase is measured on a time diversity basis in orderto avoid the disadvantageous affects of noise pulses [Fig. 5 (54, 55)] which can occur coincidently on all three phases. The resulting carrier signal data is then provided [Fig. 8 (199)] to a microprocessor [Fig. 7 (80); Fig. 8 [(180)] for subsequent analysis and phase characteristic determinations. By judiciously selecting the sample and clock frquencies of the shift register, the sampling frequency for each phase and the time between sampling each of the phases can be preselected.