| 摘要 |
PROBLEM TO BE SOLVED: To provide a health checking system installed at radio base station which tests the normality of the power source of a phantom feed system in a prescribed period while local feeding is made. SOLUTION: A control section 10 periodically controls a second feeding switching circuit 8 while local feed operation is made, and inputs the voltage corresponding to a phantom power supply voltage generated by means of a boosting circuit 9 to a DC/DC converter 6 for phantom-feed, and the then voltage outputted from the convert 6 is inputted to a discrimination circuit 11. The circuit 11 compares the output voltage of the converter 6 with a preset threshold and, when the compared result falls within the range of the threshold displays phantom-feed operation enable information on a display device. When the compared result does not fall within the range, the circuit 11 displays phantom-fed operation disable information on the display device. |
