Inventors:
Robert J. Beyers - Snellville GA
Charles R. Bramhall - Norcross GA
Gregory S. Durden - Jonesboro GA
Robert J. Edwards - Lawrenceville GA
Ray T. Haman - Duluth GA
Douglas J. Hoder - Lakewood GA
Donald R. Huntley - Roswell GA
John A. Kennedy - Doraville GA
Emory L. McGinty - Lilburn GA
Jay C. McMullan - Doraville GA
David J. Naddor - Doraville GA
Randolph J. Schaubs - Stone Mountain GA
Jesse M. Still - Woodstock GA
Anthony J. Wasilewski - Alpharetta GA
Lamar E. West - Maysville GA
Donovan S. White - Alpharetta GA
Assignee:
Scientific-Atlanta, Inc. - Norcross GA
International Classification:
H04B 1700, H04H 102
Abstract:
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.