| 摘要 |
PURPOSE:To contrive the saving of power consumption by controlling the transmission and stop of one transmission circuit among transmission circuits based on a reception level of a reception circuit. CONSTITUTION:Reception signal level information 30 received by a reception circuit 5 of an active system is sent to a reception signal discrimination circuit 20. The circuit 20, based on the information, compares the level with a preset level for the quantity. When the result of comparison is larger (that is, no fading or the like takes place), a control signal 41 is sent to turn off the power supply fed to a transmission circuit 14 of its own station, thereby stopping the operation. On the other hand, when the result of discrimination is smaller (fading takes place), the signal 41 turns on the power supply of the circuit 14 reversely. This operation applies to an equipment of opposite station similarly. |
