| 摘要 |
PURPOSE:To equalize waveforms even if the length of a transmission line is changed by using a waveform equalizing circuit to equalize the permissible maximum transmission line length of a transmission line at the sending side and connecting one of plural pseudo lines selectively depending on the degree as the length of the transmission line is decreased. CONSTITUTION:A waveform equalizing circuit 12 connects to a transmitter 11 and the waveform equalizing circuit 12 is designed that the waveform is equalized to the maximum length of a transmission line 15. Pseudo lines 13-1, 13-2 having different characteristics are connected selectively to the waveform equalizing circuit 12 via switching terminals 14-1, 14-2 depending on the degree that the length of the transmission line is decreased. |
