Scientific-atlanta, Inc.

Other

Emory L McGinty, Jr

Lamar E West, Jr

Jesse M Still

Charles R Bramhall

Anthony John Wasilewski

Gregory S Durden

Jay C McMullan, Jr

David J Naddor

Randolph J Schaubs

Robert J Beyers, Ii

Donald R Huntley

Ray T Haman, Jr

Robert J Edwards

John A Kennedy

Douglas J Hoder

Donovan S White

Luis A Rovira

Curt M Kuban

Alex M Cook, Jr

Jeffrey C Ting

Rueenguang A Shyu

A remote control system including a hand held remote control unit with an alphanumeric information display, for controlling and communicating with a first controlled device, such as a digital music tuner connected to a community antenna television (CATV) cable, and for controlling a selected one of a plurality of second controlled devices, such as CATV set-top units, VCRs, or television sets. A first, high speed, error free display information communications protocol is utilized for transmitting program content or other information from a device, such as the CATV-connected music tuner, to the remote control unit for display. A second or control communications protocol is utilized by the remote control unit for controlling the first controlled device and a selected one of the second controlled devices. The CATV cable-connected music tuner utilizes the 44.1 kHz Compact Disk (CD) clock signal embedded in digital music signals provided via the cable to derive clocking signals for implementing the display information communications protocol, resulting in an efficient, low cost electronic design.

Methods and apparatus for communication program data signals via a

A method of transferring a data message from a remote unit to a central location is provided. A plurality of data channels is selected for transmitting the data message from the remote unit to the central location. At least one random transmit time is generated for transmitting the data message for each of the plurality of data channels. The data message is transmitted over the plurality of data channels at the transmit times. An apparatus for transferring a data message from a remote unit to a central location is also provided.

Cable television radio frequency subscriber data transmission apparatus

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.

System for data channel level control

A BPSK modulator for modulating a data signal onto a carrier signal comprises first and second transistors connected in a mirror configuration and a center tap transformer. The collectors of the first and second transistors are coupled to a first winding of the center tap transformer and the BPSK modulated carrier signal is provided at the output of the transformer. Unmodulated data is input to each of the bases of the first and second transistors. The emitters of the first and second transistors are coupled to the collector of a third transistor whose base receives the carrier signal. A programmable gain control circuit is also coupled to the base of the third transistor for step-wise adjustment of the transmit level of the BPSK modulated carrier signal. In this manner, the transmit output level of the modulator may be adjusted when necessary in the event of changing environmental or other considerations.

Binary phase shift key modulator with programmable level control

Growing community of inventors

Lilburn, GA, United States of America

Emory L McGinty, Jr