Method of detecting troubles in a receiver for a common control

Details Method of detecting troubles in a receiver for a common control Method of detecting troubles in a receiver for a common control

1981-10-21

1984-04-17

Rubinson, G. Z.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455 67, 455 33, H04Q 704, H04B 1700

Patent

active

044436610

ABSTRACT:
A mobile radio system having apparatus for monitoring problems in the access channel receiver of a base station. The output of the access channel receiver of a base station is linked directly, or indirectly via an access channel data receiver in a control center, to a test apparatus. The test apparatus monitors the signals linked thereto and in this manner determines that signals are passing through the access channel receiver. If no signal is received at the test apparatus within a first predetermined time it transmits to the base station a test signal designed to be received by the base station access channel receiver. If the access channel receiver is operating correctly it will receive the test signal and a signal will be linked to the test apparatus. If the access channel receiver is not operating correctly no signal will be linked to the test apparatus, and if the test apparatus does not receive the test signal from the output of the access channel receiver within a second predetermined time after the transmission of the test signal, the test apparatus will provide an output indicating that a problem exists in the access channel receiver.

REFERENCES:
patent: 3970940 (1976-07-01), Venn
patent: 4180708 (1979-12-01), Yamaguchi et al.
Review of the Electrical Communication Laboratories, vol. 25, No. 11-12, Nov.-Dec. 1977, pp. 1231-1244, Sakamoto et al., "Mobile Unit for 800 MHz Band Land Mobile Telephone System".
Review of the Electrical Communication Laboratories, vol. 25, No. 11-12, Nov.-Dec. 1977, pp. 1172-1190, Yoshikawa et al., "800 HMz Band Land Mobile Telephone Control System".
NEC Research & Development, No. 57, Apr. 1980, pp. 99-108, Sado et al., "Supervisory and Control Equipment".

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