Communications: electrical – Continuously variable indicating – Using a particular modulation
Patent
1995-04-20
1997-08-19
Hofsass, Jeffery
Communications: electrical
Continuously variable indicating
Using a particular modulation
34087002, 34087003, 34087011, 34087026, 375202, G08C 1916
Patent
active
056593031
ABSTRACT:
A method and apparatus for transmitting data from a monitoring station using frequency hopping and interval hopping as described. The output frequency of a transmitter in the monitoring station is hopped between selected output frequencies by retrieving random numbers from a table, generating a control voltage corresponding to the retrieved random number, applying the control voltage to an RF oscillator and transmitting a signal from a transmitter in the monitoring station using the signal from the RF oscillator as a carrier. The output frequency of the transmitter is limited between a maximum output frequency and a minimum output frequency by comparing the retrieved random number to data limits stored in a memory in the transmitter and rejecting retrieved random numbers outside of the retrieved limits. Interval hopping is realized by selecting a random number from the random number table, multiplying the random number by a fixed increment and adding the product to a minimum time interval.
REFERENCES:
patent: 4103250 (1978-07-01), Jackson
patent: 4476566 (1984-10-01), Dent
patent: 4638417 (1987-01-01), Martin, Jr. et al.
patent: 4694466 (1987-09-01), Kadin
patent: 4704585 (1987-11-01), Lind
patent: 4791377 (1988-12-01), Grandfield et al.
patent: 4965531 (1990-10-01), Riley
patent: 5179569 (1993-01-01), Sawyer
patent: 5210771 (1993-05-01), Schaeffer et al.
patent: 5235613 (1993-08-01), Brown et al.
patent: 5255086 (1993-10-01), McMullan et al.
patent: 5307372 (1994-04-01), Sawyer et al.
patent: 5335276 (1994-08-01), Thompson et al.
patent: 5386435 (1995-01-01), Cooper et al.
patent: 5425049 (1995-06-01), Dent
patent: 5430761 (1995-07-01), Bruckert et al.
patent: 5438329 (1995-08-01), Gastouniotis et al.
patent: 5455962 (1995-10-01), Kotzin
patent: 5502722 (1996-03-01), Fulghum
patent: 5519388 (1996-05-01), Adair, Jr.
Hofsass Jeffery
Mannava Ashok
Pojunas Leonard W.
Schlumberger Industries Inc.
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