CHANNEL SELECTION INDICATOR FOR MEMORY TUNING SYSTEM

摘要

An all-channel two mode television tuning system includes a counter for sequentially generating channel numbers to adjust tuning. An 82 x 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for storage of signals for tuning to preselected channels. Blanking circuitry responsive to the 60Hz line frequency as a clock source causes repetitive flashing of the channel number indicators until the generated channel number has been stored. In the operate mode channel numbers are again generated to access the memory locations and logic circuitry determines when the generated channel numbers correspond to preselected (stored) channel numbers to provide tuning thereto.