Warning receiver readiness monitoring circuit

Details Warning receiver readiness monitoring circuit Warning receiver readiness monitoring circuit

1990-01-24

1991-12-31

Eisenzopf, Reinhard J.

Telecommunications

Interference signal transmission

455 45, 455166, H04B 100, H04B 1700

Patent

active

050778277

ABSTRACT:
A warning radio receiver is adapted to receive not only a recognition signal for emergency broadcast but also two further recognition signals, namely a warning network transmitter recognition signal and a warning region recognition signal. If, for example, the currently tuned transmitter changes its warning region recognition signal, after the expiration of the timing period of a first timer 16, one or more seeking operations for other transmitters with the predetermined warning region recognition signal are started. If a predetermined number of such seeking operations remain unsuccessful, the reception readiness of the transmitter is demonstrated by switchover to a transmitter associated with a different warning region. If such other transmitters also cannot be found, exceeding another predetermined number of fruitless seeking operations results in the generation of a receiver malfunction indication.

REFERENCES:
patent: 3568065 (1971-03-01), Pagany et al.
patent: 3949401 (1976-04-01), Hegeler
patent: 4434504 (1984-02-01), Fredrickson
patent: 4435843 (1984-03-01), Eilers et al.
patent: 4450589 (1984-05-01), Eilers et al.
patent: 4476573 (1984-10-01), Duckeck
patent: 4476581 (1984-10-01), Bragas
patent: 4499603 (1985-02-01), Eilers
patent: 4862513 (1989-08-01), Bragas

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