JPS5715269A - Video device - Google Patents

Video device

Info

Publication number
JPS5715269A
JPS5715269A JP8953280A JP8953280A JPS5715269A JP S5715269 A JPS5715269 A JP S5715269A JP 8953280 A JP8953280 A JP 8953280A JP 8953280 A JP8953280 A JP 8953280A JP S5715269 A JPS5715269 A JP S5715269A
Authority
JP
Japan
Prior art keywords
circuit
video
agc
monitoring
agc voltage
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.)
Pending
Application number
JP8953280A
Other languages
Japanese (ja)
Inventor
Etsuo Hoyano
Takashi Shimamura
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP8953280A priority Critical patent/JPS5715269A/en
Publication of JPS5715269A publication Critical patent/JPS5715269A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To prevent picture quality from deteriorating by providing the video deck of a wireless portable video device with a means of monitoring the intensity of a received signal and by generating an alarm tone when its intensity decreases below some level. CONSTITUTION:The circuit part 1 of a video deck consists of an antenna 3, a tuner 4, an intermediate frequency amplifying circuit 5, a video detecting circuit 6, a video amplifying circuit 7, an AGC circuit 8, etc.; the AGC circuit 8 applies the intermediate frequency amplifying circuit 5 with an IF.AGC voltage E1 and the tuner 4 and a monitoring circuit 2 with a front-end AGC voltage E2. The AGC voltage E2 is applied to the variable resistance 9 of the monitoring circuit 2 and its voltage variations are amplified by a DC amplifier 10 and supplied to a Schmitt trigger circuit 11. Since a driving circuit 12 drives a buzzer 13 in response to the on-off states of its output, the AGC voltage E2 drops when a video camera 14 is set away from the video deck 1 by a prescribed distance or more, thereby driving the buzzer 13.
JP8953280A 1980-06-30 1980-06-30 Video device Pending JPS5715269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8953280A JPS5715269A (en) 1980-06-30 1980-06-30 Video device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8953280A JPS5715269A (en) 1980-06-30 1980-06-30 Video device

Publications (1)

Publication Number Publication Date
JPS5715269A true JPS5715269A (en) 1982-01-26

Family

ID=13973415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8953280A Pending JPS5715269A (en) 1980-06-30 1980-06-30 Video device

Country Status (1)

Country Link
JP (1) JPS5715269A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61149874U (en) * 1985-03-08 1986-09-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61149874U (en) * 1985-03-08 1986-09-16

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