| 摘要 |
PURPOSE: A device for monitoring a repeater to measure strength of an electric field is provided to measure a strength change of an electric field around a repeater by being installed in the repeater, and to monitor whether the repeater is normal, thereby simultaneously managing more than two providers. CONSTITUTION: A receiver(100) receives an electric wave around a repeater. An IF converter(200) converts the received electric wave into an IF. A level detector(9) measures strength of the converted electric wave. An operation controller(400) converts data on the strength of the electric wave into a digital signal. A transmission PLL module(16) FSK-modulates the digital signal. A transmitter(600) transmits the FSK-modulated signal. The receiver(100) includes a receiving RF switch(3). The transmitter(600) includes a transmission RF switch(22). The receiving RF switch(3) and the transmission RF switch(22) are connected to each other by a connection control signal of the operation controller(400). A signal of the transmission RF switch(22) is inputted to the IF converter(200) through the receiving RF switch(3). The operation controller(400) measures electric field strength of the signal, and controls a transmission output level.
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