| 摘要 |
PURPOSE:To switch lines between different systems, by connecting plural IF band or RF band switches through a demodulating circuit, a speed converting circuit, and a modulating circuit. CONSTITUTION:Between a system A consisting of up lines 111-11n and down lines 121-12n connected to a changeover switch 13 of the IF band and a system B consisting of up lines 11'1-11'n and down lines 12'1-12'n connected to a changeover switch 20 of the IF band, up lines of the system A (B) are connected to down lines of the system B (A) besides switching in each system. For example, the up line 112 of the system A is connected to a demodulating circuit 14 and is connected to the changeover switch 20 through a speed converting circuit 16 and a modulating circuit 18. The speed converting circuit 16 is provided for converting the signal form, the signal speed, etc. between different systems. |
