| 摘要 |
The system has a receiving and main station (1), and end connection points (25) that are connected with the main station via a cable television network (CATV). The television system is equipped for downwards signal transmission in a direction of the connection points and for upwards signal transmission in the direction away from the connection points. A direct quadrature amplitude modulation(RTM: Not defined) unit is accommodated in the television system. The modulation unit directly modulates an information signal on a carrier wave signal to be transmitted via the CATV. Independent claims are also included for the following: (1) an administration center for positioning and monitoring operating positions of a direct quadrature amplitude modulation (RTM: Not defined) unit (2) a transmitting unit comprising a digital data processing unit and a quadrature amplitude modulation unit (3) a coaxial cable transmission system in a building, comprising a transmitting unit. |
