Patent ID: 8331428

Claim:
A signal transmission apparatus comprising: a first signal transmission section configured to transmit a first signal for performing measurement of characteristics of a transmission line to the transmission line, the transmission line comprising multiple transmission signal lines; a reflection characteristic measurement section configured to measure a reflection characteristic of the transmission line based upon a reflected signal transmitted by the first signal transmission section and reflected by the transmission line; a pass characteristic measurement section configured to measure a pass characteristic of the transmission line based upon a passed signal that has been transmitted by the first signal transmission section and has passed the transmission line; a determination section configured to determine a transmission clock frequency based upon the reflection characteristic measured by the reflection characteristic measurement section and the pass characteristic measured by the pass characteristic measurement section; a second signal transmission section configured to modulate information using the transmission clock frequency determined by the determination section and to transmit a second signal obtained by modulation to the transmission line; and a signal receiving section configured to receive and to demodulate the second signal which has been transmitted by the second signal transmission section and has passed the transmission line.