Circuit test system of mobile communication

Abstract

Abstract PURPOSE:To make it possible to perform a circuit test including a radio section, by providing a monitor terminal on the transmitter and monitoring the operation of the transmitter and receiver by the monitor receiver, in the radio base station which is equipped with the multichannel switching transmitter and receiver. CONSTITUTION:The receiving filter 11 and the transmission filter 13 are connected to the receiving transmission common antenna 1 through the circulators 2, 3, respectively. An output of the terminal matching resistor 10 is lead into the monitor receiver 16. In case the circuit test is performed, the radio channel No. and the test signal are sent to the transmitter and the receivers 6, 5 from the control unit 9, and at the same time, the channel No. is sent to the local oscillator 17 of the monitor receiver 16, as well. And a test signal sent from the transmitter 6 is received by the monitor receiver, too, and in case both the transmitter and the receiver are operated normally, a fixed receiving electric field level and a demodulated output of the test signal are received by the monitor receiver, and these outputs are sent to the control unit 9 as supervisory information.

Inventors

• 👤 Takayoshi Nagatsu
• 👤 Kunio Watanabe
• 👤 Fumiyuki Adachi

Bibliographic Details