Television tuning system with provisions for quickly locating ac

Details Television tuning system with provisions for quickly locating ac Television tuning system with provisions for quickly locating ac

1987-05-08

1988-08-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581911, 3581951, 455164, 455182, H04N 550

Patent

active

047631953

ABSTRACT:
A tuning system for tuning non-standard frequency RF television signals provided by cable distribution networks and television accessories conducts first and second consecutive searches by changing the local oscillator frequency. The first search is limited to search frequencies corresponding to predictable non-standard frequencies associated with the major cable distribution networks. The second search includes more search frequencies and extends over a wider frequency range than the first. During an auto-programming mode, in which active channels are identified, for memorization in a channel list portion of a memory, only the first search is conducted to minimize the required time.

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"RCA Color Television Basic Service Data", 1986, pp. 1-18.
"RCA Television Service Data--Chassis CTC-111 Series", File 1981, C-3, FIG. 20 on pp. 26 and 27.
"RCA May 1981 Television Product Technical Manual--MST007 Multiband Tuner, CTC-110 Chassis, CTC-111 Color Trak 2000", pp. 25-29._

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