| 摘要 |
A tuning system of a television receiver of the type which changes the magnitude of a tuning voltage until an RF carrier corresponding to a television channel is located includes channel identification apparatus for generating a vertical tuning bar at a predetermined height and having a horizontal position determined by the magnitude of the tuning voltage until a carrier is detected and after a carrier is detected gradually changing its height until it disappears to provide a positive indication to a viewer that a carrier has been detected.
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