In agreement with a recent paper by Pierce, it is shown that ternary, phase-shift keyed (PSK) signals attain the lowest bit error rate at high signal-to-noise ratio (SNR) if more than

binary digits can be mapped to a symbol. This point is further demonstrated by using a 3B-2T Code which maps 1.5 bits to a symbol. The spectrum and bit error rate are evaluated for the 3B-2T coded Ternary. PSK signal and compared with those of quaternary phase-shift keyed (QPSK) signal.