| 摘要 |
PURPOSE:To prevent level variance by installing a reference transmitting device at a primary outlet and a comparator which compares a reference signal level with an SS transmission signal level at a terminal station, and adjusting the SS transmission signal level which is transmitted from the terminal station to the primary outlet by comparison output. CONSTITUTION:At the primary outlet 10, the reference signal transmitting device 14 is installed, which transmits the SS transmission signal St and reference signal Sr received through terminal stations T1-T11 to terminal stations T1- T11. T1-T11 terminal stations store the reference signal Sr level, compare it with the SS transmission signal level and tune the transmission level to the primary outlet so as to be the prescribed value. In this way, the SS transmission signal variance is made as less as possible and can enhance multiplication in such a level where it is close to the theoretical threshold value of SS method. |
