Sony Corporation of America. Sony. Tuner/Timer TT-100 Operating Instructions. The Sony Tuner/Timer TT-100 is a combination tuner and digital timer for use with Sony U-matic videocassette recorders capable of being operated by means of a timer. The device receives both VHF and UHF channels, functioning as a signal source for off-the-air recordings. The digital timer may be used to record a TV program while the recorder is unattended. Table of Contents: Features, Caution, Location of Parts and Controls, Connections, Time Adjustment, Power Button and Timer Switch, Recording TV Programs, Timer Recording, Function of Source Switch, Attaching Auxiliary Legs, Specifications, Repacking for Shipment, and Block Diagram.