| 摘要 |
PURPOSE:To make the repeating possible without damaging each circuit impedance, by amplifying the signal from a lower-level station in an amplifier with (0) dB to transmit the signal to an upper-level station and inputting the signal of a local station also. CONSTITUTION:The signal from the lower-level station inputted to an input terminal (a) is transmitted to the first switching contact 12 through a repeating coil 3. At this time, if a power source voltage E is supplied to an amplifier 10, a relay 11 is operated, and the first and the second switching contacts 12 and 13 are connected as shown in figure by broken lines, and therefore, the signal from the lower-level station is terminated in a resistance 14 and is inputted to the amplifier 10 together with the signal of the local station inputted from an input terminal (c). The amplifier 10 synthesizes and amplifies the signal from the lower-level station and the signal of the local station, and the output signal is transmitted to a line 2 to the upper-level station from an output terminal (b) through a resistance 15, the second switching contact 13, and a repeating coil 4 and is transmitted to the upper-level station. |
