| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna modem and an antenna control system which can be used regardless of a power supply transmitted by a coaxial interface system.SOLUTION: The antenna modem includes a power supply determining/switching circuit 3 determining a power supply defined by an AISG standard and outputing a power supply signal input from a BS modem 13 and separated from a feed signal, and switching the power supply line of output destination so as to output that power supply signal to the power supply line for the power supply thus determined, and a DC/DC converter 4 for both positive and negative power supply inputs that generates a power supply for a modem circuit 35, from a power supply signal input from the BS modem 13 and separated from the feed signal, and outputing the power supply to the modem circuit 35. |
