Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1994-07-07
1996-01-23
Pham, Chi H.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455 677, 455126, 4552262, 455293, 4552264, H04B 1700
Patent
active
054871760
ABSTRACT:
A reception amplifier failure detecting device includes an antenna sharing unit, a reception amplifier, a receiver, an electric field detecting section, a transmitter, a power control section, and a failure detecting section. The antenna sharing unit demultiplexes a transmission signal from a transmission system to an antenna and a reception signal from the antenna to a reception system. The reception amplifier amplifies the reception signal. The receiver receives an output signal from the reception amplifier. The electric field detecting section detects the electric field strength of a signal received by the receiver. The transmitter outputs a transmission signal to the antenna via the antenna sharing unit. The power control section controls the transmission power of the transmitter on the basis of a standard transmission value, and outputs transmission power information. The failure detecting section performs failure determination by comparing the electric field strength information with a failure detection reference value set on the basis of a standard attenuation value, a standard amplification value of the reception amplification means, and the transmission power information of the transmission means. A reception amplifier failure detecting method is also disclosed.
REFERENCES:
patent: 4864639 (1989-09-01), Dapore et al.
patent: 5313657 (1994-05-01), Sakamoto et al.
"Mobile Radio Communication Scheme", Kagakushimbun-sha, p. 202 (May 1979).
NEC Corporation
Pham Chi H.
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