SYSTEM FOR DATA CHANNEL LEVEL CONTROL

Automatic level calibration apparatus for transmitting data from a cable television terminal to the headend of a cable television system comprises programmable transmitter apparatus of the terminal, programmable receiving apparatus at the headend and a calibration controller. Responsive to an addres...

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Bibliographische Detailangaben
Hauptverfasser:	HODER, DOUGLAS J, MCGINTY, JR., EMORY L, BRAMHALL, CHARLES R, EDWARDS, ROBERT J, HAMAN, JR., RAY T, DURDEN, GREGORY S, WASILEWSKI, ANTHONY J, STILL, JESSE M, WEST, JR., LAMAR E, WHITE, DONOVAN S, KENNEDY, JOHN A, SCHAUBS, RANDOLPH J, HUNTLEY, DONALD R, BEYERS, II, MCMULLAN, JR., JAY C, NADDOR, DAVID J
Format:	Patent
Sprache:	eng
Schlagworte:	BROADCAST COMMUNICATION CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	Automatic level calibration apparatus for transmitting data from a cable television terminal to the headend of a cable television system comprises programmable transmitter apparatus of the terminal, programmable receiving apparatus at the headend and a calibration controller. Responsive to an addressed command from the headend, the programmable transmitter apparatus returns a sequence of levels at a particular calibration frequency. The programmable receiver apparatus determines an indication of the received signal strength of each of the levels of the sequence of levels. The controller determines an optimum level for transmissions from the terminal.