JPS55134583A - Automatic preset channel selector of television receiver - Google Patents

Automatic preset channel selector of television receiver

Info

Publication number
JPS55134583A
JPS55134583A JP4108779A JP4108779A JPS55134583A JP S55134583 A JPS55134583 A JP S55134583A JP 4108779 A JP4108779 A JP 4108779A JP 4108779 A JP4108779 A JP 4108779A JP S55134583 A JPS55134583 A JP S55134583A
Authority
JP
Japan
Prior art keywords
broadcast radio
electric field
field intensity
radio wave
presetting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4108779A
Other languages
Japanese (ja)
Other versions
JPS6256714B2 (en
Inventor
Shigeo Matsuura
Eisaku Akutsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4108779A priority Critical patent/JPS55134583A/en
Publication of JPS55134583A publication Critical patent/JPS55134583A/en
Publication of JPS6256714B2 publication Critical patent/JPS6256714B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To prevent presetting by a spurious wave, by making it possible to preset only the broadcast radio wave of a local station by bringing presetting operation to effect only when a broadcast radio wave whose electric field intensity surpasses a fixed value is received. CONSTITUTION:The electric field intensity of a received broadcast radio wave is inferred from variation in AGC voltage, developed by video IF circuit 3 and applied to electronic tuner 2, by detecting the AGC voltage. When the electric field intensity exceeds normal value 60dBmu, presetting operation is carried out and when not, the presetting operation is inhibited, so that only broadcast radio waves of intermediate and high electric fields can be preset.
JP4108779A 1979-04-06 1979-04-06 Automatic preset channel selector of television receiver Granted JPS55134583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4108779A JPS55134583A (en) 1979-04-06 1979-04-06 Automatic preset channel selector of television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4108779A JPS55134583A (en) 1979-04-06 1979-04-06 Automatic preset channel selector of television receiver

Publications (2)

Publication Number Publication Date
JPS55134583A true JPS55134583A (en) 1980-10-20
JPS6256714B2 JPS6256714B2 (en) 1987-11-26

Family

ID=12598681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4108779A Granted JPS55134583A (en) 1979-04-06 1979-04-06 Automatic preset channel selector of television receiver

Country Status (1)

Country Link
JP (1) JPS55134583A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62196980A (en) * 1986-02-25 1987-08-31 Sony Corp Display device for channel selection index of on-vehicle television
JPS62196982A (en) * 1986-02-25 1987-08-31 Sony Corp Display device for channel selection index of on-vehicle television
JPH02128489U (en) * 1989-03-30 1990-10-23

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434621A (en) * 1977-08-23 1979-03-14 Matsushita Electric Ind Co Ltd Input field identifying circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434621A (en) * 1977-08-23 1979-03-14 Matsushita Electric Ind Co Ltd Input field identifying circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62196980A (en) * 1986-02-25 1987-08-31 Sony Corp Display device for channel selection index of on-vehicle television
JPS62196982A (en) * 1986-02-25 1987-08-31 Sony Corp Display device for channel selection index of on-vehicle television
JPH02128489U (en) * 1989-03-30 1990-10-23

Also Published As

Publication number Publication date
JPS6256714B2 (en) 1987-11-26

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