Television viewer data collection system

In a system for monitoring habits of cooperating television viewers or panelists, including a central location and a plurality of remote units at a plurality of panelist locations, a remote unit for connection to a television broadcast receiver comprising:

• means for receiving a television broadcast signal;
• a viewer control means including a channel selector and a channel lock switch actuable between channel lock and unlock positions and coupled to said means for receiving a television broadcast signal, said channel lock switch functioning in said channel lock position to lock the associated television broadcast receiver to the channel currently selected notwithstanding any subsequent changes in the channel selector;
• a microprocessor;
• first memory means for storing programming information for said microprocessor and second memory means for storing data;
• timing means for generating time of day information;
• means for coupling said viewer control means through said microprocessor to the television broadcast receiver, said microprocessor functioning to monitor changes in said channel selector and the state of said channel lock switch and to store same, together with time of day information, in said second memory means, changes in said channel selector while said channel lock switch is in the unlock position being stored as channel viewing data and changes in said channel selector while said channel lock switch is in the lock position being stored as one of viewer reaction and viewer identification data;
• a modem for connection of the non-dedicated telephone network, said modem being coupled to and under the control of said microprocessor;
• register means for setting a unique identification signal for each remote unit, each such unique identification signal corresponding to a preselected unique call-in time for each such remote unit;
• said microprocessor functioning to establish communication through said modem with the central location at the preselected unique call-in time and to transmit the data stored in said second memory means to the central location;
• and
• wherein said second memory means includes a channel substitution table and wherein the contents of said channel substitution table are down loaded from the central location to the remote unit during communication at said unique call-in time, said microprocessor controlling channel selection to effect substitute channel selection at preselected times in accordance with said channel substitution table regardless of the manually viewer selected channel.