radio signal 151 incidentally the number of sectors is not limited to three but one sector or an appropriate number of sectors may well be included besides the receivers and the transmitter s may well be disposed in appropriate numbers of loops the transmitter 133 converts a reverse baseband signal 155 inputted from a modulator 136 into a reverse radio signal 152 the receiver 0 134 receives the forward radio signal 151 transmitted by an access terminal 101 through the dup 130 as a signal 153 so as to convert the received signal into a forward baseband signal 156 on the other hand the receiver 1 135 receives the forward radio signal 151 transmitted by the access terminal 101 through the bpf 131 as a signal 154 so as to convert the received signal into a forward baseband signal 157 incidentally since the configuration of each of the sector 2 111 and sector 3 112 may be identical to the configuration of the sector 1 110 it shall be omitted from description the modulation demodulation process portion 121 includes the modulator 136 and a demodulator 137 and it modulates and demodulates data the line interface portion 114 is the interface between the radio access point 100 and a network 102 the access point controller 115 has the functions of monitoring and controlling the radio access point 100 the test function unit 113 includes for example an access terminal function portion 126 and a test function controller 127 incidentally the practicable configuration of the test function unit 113 will be described later a maintenance terminal 103 is connected to the access.