Communications: electrical – Continuously variable indicating – With meter reading
Patent
1988-08-09
1990-12-11
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340825490, 455 31, 455 67, 455 33, 379 59, H04B 700
Patent
active
049773992
ABSTRACT:
In a ratio paging system of the type having digital data modulated onto radio signals transmitted from a radio station to receiving units at remote sites, a test system. The test system includes a transmitter test module coupled to a radio transmitter at the station and a test bed module located at the remote site. The transmitter test module includes a microprocessor for generating digital test data, and a modulator coupled to the microprocessor for modulating the test data onto a radio signal and for injecting the radio signal into the station transmitter. The test bed includes a receiver for receiving the modulated radio signal, a demodulator for demodulating the received radio signal to recover the digital test data, and a computer for processing the recovered digital test data to generate paging test information. The mobile test bed also includes means for determining the latitude and longitude of a site to generate digital location data which is used to generate test information. The test system further includes a mobile vehicle for transporting the test bed, a power supply in the vehicle for providing power to the test bed, and means for determining the distance travelled by the vehicle to provide a test sampling rate. The test bed and the transmitter test module may communicate using a cellular phone ystem for transmitting and receiving coded dial tones. The coded dial tones correspond to predetermined digital test data patterns and other test information.
REFERENCES:
patent: 4661972 (1987-04-01), Kai
patent: 4713808 (1987-12-01), Gaskill et al.
patent: 4758833 (1988-07-01), Dunkerton et al.
patent: 4775997 (1988-10-01), West, Jr. et al.
patent: 4788711 (1988-10-01), Nasco, Jr.
Gehring Mark R.
Park Daniel J.
Price Gary A.
AT&E Corporation
Galbi Elmer W.
Magistre Dervis
Yusko Donald J.
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