PROBLEM TO BE SOLVED: To easily grasp problems in a 2-way amplifier and a signal transmission line. SOLUTION: A status monitor center device 2 receives monitor information transmitted to a signal transmission line 6, the information monitored by status monitors provided to a plurality of community reception system configuration devices 8, 10a, 10b, 10c, 10d, 10e interposed in the signal transmission line 6 resulting from monitoring monitor objects of the community reception system configuration devices. The status monitor center device 2 includes a display device 18 and allows a CPU 14 to graphically display the monitor information sent from each status monitor in common to the community reception system configuration devices 8, 10a, 10b, 10c, 10d, 10e on the same screen of the display section 18.
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