| 摘要 |
PURPOSE:To reduce the number of receiving delay circuits by mounting a signal path intermittent switch circuit and a system controller for using each receiving delay circuit not only at the time of dynamic focus reception but also at the time of parallel simultaneous reception by the control of the operation of said switch circuit. CONSTITUTION:A system controller 18 takes charge of the overall operational control of this apparatus. That is, a transmission delay control part 3, a receiving delay control part 7, switches 8, 13a, 13b and DSCs 14, 15 are controlled by the system controller 18. By controlling the switches 8, 13a, 13b, receiving delay circuits 5, 6 are used not only at the time of dynamic focus reception but also at the time of parallel simultaneous reception in the apparatus and, therefore, the receiving delay circuits of two systems are enough and it is unnecessary to mount four systems. As a result, the number of receiving delay circuits can be reduced. |
