JPS57152267A - Facsimile device - Google Patents

Facsimile device

Info

Publication number
JPS57152267A
JPS57152267A JP56037137A JP3713781A JPS57152267A JP S57152267 A JPS57152267 A JP S57152267A JP 56037137 A JP56037137 A JP 56037137A JP 3713781 A JP3713781 A JP 3713781A JP S57152267 A JPS57152267 A JP S57152267A
Authority
JP
Japan
Prior art keywords
circuit
sawtooth wave
nonleaner
observing
picture
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
JP56037137A
Other languages
Japanese (ja)
Inventor
Toshiaki Kumakawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56037137A priority Critical patent/JPS57152267A/en
Publication of JPS57152267A publication Critical patent/JPS57152267A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimiles In General (AREA)

Abstract

PURPOSE:To observe the characteristics of a nonleaner circuit simply by inputting a sawtooth wave to the nonleaner circuit and observing only the output terminal by an oscilloscope. CONSTITUTION:A changeover switch 6 is normally set to the (a) side. At the measurement of gradation characteristics, the switch 6 is set to the (b) side and a sawtooth wave for characteristic observation from a sawtooth wave generating circuit 4 is inputted to a gradation correcting circuit 7. Thus, static observation on a picture of an ordinary oscilloscope is made possible only by an output signal from the circuit 7, adjusting the circuit easily while observing the picture.
JP56037137A 1981-03-14 1981-03-14 Facsimile device Pending JPS57152267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56037137A JPS57152267A (en) 1981-03-14 1981-03-14 Facsimile device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56037137A JPS57152267A (en) 1981-03-14 1981-03-14 Facsimile device

Publications (1)

Publication Number Publication Date
JPS57152267A true JPS57152267A (en) 1982-09-20

Family

ID=12489223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56037137A Pending JPS57152267A (en) 1981-03-14 1981-03-14 Facsimile device

Country Status (1)

Country Link
JP (1) JPS57152267A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922335A (en) * 1986-11-14 1990-05-01 Canon Kabushiki Kaisha Color film reading apparatus providing high-gradation color signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922335A (en) * 1986-11-14 1990-05-01 Canon Kabushiki Kaisha Color film reading apparatus providing high-gradation color signals
US4969053A (en) * 1986-11-14 1990-11-06 Canon Kabushiki Kaisha A color film reading apparatus providing high-gradation color signals

Similar Documents

Publication Publication Date Title
ATE86424T1 (en) CONTROL DEVICE FOR A TELEVISION MONITOR.
JPS57152267A (en) Facsimile device
ES8102359A1 (en) Device for displaying an analog signal on a display screen.
GB1319689A (en) Screening process simulation apparatus
JPS5742282A (en) A/d converter for output video signal of vtr
JPS56106491A (en) Stereoscopic television device
JPS5754870A (en) Offset voltage compensating circuit for oscilloscope
JPS5383426A (en) Video signal processing circuit
JPS5420617A (en) Picture input system
JPS5664566A (en) Shading compensating device for solid state image pickup element
JPS5315858A (en) Spectrum analyzer
JPS53138261A (en) Integrated circuit device
GB9421842D0 (en) An apparatus for testing the quality of the logic levels of a digital signal
JPS5443418A (en) Time axis error correcting device
SU1285629A1 (en) Device for automatic control of white balance in colour picture tube
Thelen Trunk Test Circuit
JPS57160253A (en) Measurement system for characteristics of switch-board
JPS57190280A (en) Monitor for radar receiver
JPS52119817A (en) Measuring device for convergence characteristic
JPS5554284A (en) Electron beam deflecting device
JPS5631289A (en) Beam index type color television receiver
JPS5614927A (en) Measuring device for infrared ray temperature distribution
JPS5520489A (en) Level characteristic direct viewing unit
JPS56149181A (en) Solid image pickup device
JPS5673954A (en) Extension callout system in button telephone device