| 摘要 |
PURPOSE:To suppress the peak characteristics of attenuation, by inserting the delay line at least to one of the transmission lines, in the system in which the signal is transmitted on different transmission line through frequency or time sharing. CONSTITUTION:The signal from the transmission unit 3 is split into the frequency component of low and high frequency with the branch units of LPF4-1 and HPF4-2, and the low frequency component is transmitted through the balanced type transmission line 5 of shielded cable and high frequency component is through coaxial type transmission line 6 individually. The delay line DL16 is inserted to the relay station 7 to adjust the phase difference of the lines 5 and 6. By using the phase rotation of DL16, adjustment is made so that the both signals are almost in the same phase at the area in which the transmission signal level of the lines 5, 6 is equal. The signal adder 7 adds the signals transmitted through the lines 5 and 6 in vector, the attenuation peak value is reduced since the phase difference between two signals is close to the same phase, and the non-delay transmission distance can be made long. Even in the transmission of the lines when the signals split in time sharing are different, DL is inserted to each line to enable to remove jitter. |
