| 摘要 |
<p>PURPOSE:To constantly obtain an optimum equalizing and amplifying characteristic for every channel by dynamically controlling the characteristic parameter of an equalizing amplifier according to a phase difference detected by a phase difference detecting means. CONSTITUTION:The channel phase difference detector 15 detects the phase difference between a R line and a T line for every channel from the timing signal of the respective channels on a transmission R line frame from a frame assembling part 13 and a T line frame from a receiving buffer 8 and transfers to the equalizing amplifier 16 as a control signal. The equalizing amplifier 16 is situated between the receiving buffer 8 and an identifier 10, receives a control signal from the channel phase difference detector 15 to receive the T line frame and dynamically change the characteristic parameter of the equalizing amplifier 16 for every timing of the respective channels. As the larger the phase difference fed from the channel phase difference detector 15 grows, the equalizing and amplifying characteristic according to the transmission path of a long distance is obtained.</p> |
