A digital signal transmission system using a digital modulation system comprising
a digital signal transmitter having a first digital signal processing unit and
a digital signal receiver receiving a digital signal from the transmitter, wherein
the digital signal receiver comprising a second digital signal processing unit
for processing the digital signal from the transmitter and outputting a digital
demodulated signal and a correlation value signal, a signal converter coupled with
the second digital signal processing unit and supplied the correlation value signal
therefrom for generating a waveform indicating a transmission condition including
a main wave in response to the correlation value signal, and a display coupled
with the signal converter for displaying the waveform indicating a transmission
condition in the digital transmission system.
