BASE STATION, RECEIVING APPARATUS, AND RECEIVER TROUBLE DIAGNOSING METHOD

摘要

In a radio base station receiver, which uses a simple system to perform a trouble detection, a SW (201) switches between a connection of an input terminal of the receiver (133) to an antenna (114) and a termination of that input terminal. A LNA (low noise amplifier) (205) amplifies an input signal with a low distortion. SWs (202,203) switch between a first path including the LNA (205) and a second path (204) not including the LNA (205). An AGC AMP (211), the gain of which is controlled such that the output thereof is constant, amplifies the signal with the controlled gain. A base station control part causes the SW (201) to terminate the input terminal of the receiver, and further causes thermal noise to be inputted to the LNA (205). The SWs (202,203) are operated to determine the normality of the receiver based on the facts that a first gain of the AGC AMP (211) when connected to the first path, a second gain of the AGC AMP (211) when connected to the second path, and the difference between the first and second gains are within their respective predetermined ranges.