Automatic antenna coupler fault detector and indicator

Details Automatic antenna coupler fault detector and indicator Automatic antenna coupler fault detector and indicator

1990-09-20

1993-10-26

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455 677, 4552261, 455281, 455292, H04B 1700

Patent

active

052574075

ABSTRACT:
A communication system 100 comprising a dispatch sub-system 100A, a plurality of transmitters 100B, and a plurality of mobile transceivers 100C is disclosed. An antenna coupler 410 and a location sensor 414 are coupled to one another via a coax cable 412. The bias current to the coupler is supplied by the location sensor 414 via the resistor 406. A detector 200 measures the voltage across the resistor 406 which is relative to the current flowing in to the antenna coupler 410. The detector 200 compares the measured voltage via comparators 218 and 238 and determines if the measured voltage is beyond a certain boundary. The NOR gate 244 routes the comparison result to a MPU 250. The MPU 250 processes the result and transmits a signal to a base station 104 via the mobile transceiver 118. The base station 104 decodes the received signal and presents it to a dispatch center 106. A screen display 600 of a terminal at the dispatch center 106 has a dedicated column 602 for the presentation of the coupling status of the antenna coupler 410.

REFERENCES:
patent: 4612669 (1986-09-01), Nossen
patent: 4841281 (1989-06-01), Melvin, Jr.
patent: 4964065 (1990-10-01), Hicks et al.

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