JPS5472025A - Optimum picture recording current setting system of video tape recorders - Google Patents
Optimum picture recording current setting system of video tape recordersInfo
- Publication number
- JPS5472025A JPS5472025A JP13917277A JP13917277A JPS5472025A JP S5472025 A JPS5472025 A JP S5472025A JP 13917277 A JP13917277 A JP 13917277A JP 13917277 A JP13917277 A JP 13917277A JP S5472025 A JPS5472025 A JP S5472025A
- Authority
- JP
- Japan
- Prior art keywords
- thru
- signals
- recording current
- picture recording
- selector
- 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
Links
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE: To enable optimum picture recording current values to be readily set by subsequently generating the picture recording currents of various levels so as to correspond to the regions of reproduction picture images and selecting and fixing these.
CONSTITUTION: An input video signal 1a ia made to an RF signal 1b with a modulator 1, and is then supplied to a regulator 2 consisting of five attenuators 2-1 thru 5 of respectively different set levels, from which it enters a selector 3 as signals 2a1 thru 2a5. On the other hand, a vertical synchronizing signal 4a is inputted to a controller 4 and the signals 4b1 thru 4b5 having been synchronized to this are supplied to a driving circuit 5. Since the output signals 7a1 thru 7a5 of a setter 7 consisting of switches 6-1 thru 5 connecting to a power source Vcc are inputted to the circuit 5, the circuit 5 supplies the signals 5a1 thru 5a5 to the selector 3 according to the two kinds of these signals. Hence, either one of the signals 2a1 thru 2a5 is selected with the selector 3, after which the switch of the setter 7 corresponding to this is turned ON. This enables the optimun image recording current to be readily set.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13917277A JPS5472025A (en) | 1977-11-18 | 1977-11-18 | Optimum picture recording current setting system of video tape recorders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13917277A JPS5472025A (en) | 1977-11-18 | 1977-11-18 | Optimum picture recording current setting system of video tape recorders |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5472025A true JPS5472025A (en) | 1979-06-09 |
Family
ID=15239245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13917277A Pending JPS5472025A (en) | 1977-11-18 | 1977-11-18 | Optimum picture recording current setting system of video tape recorders |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5472025A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258402A (en) * | 1985-09-06 | 1987-03-14 | Sony Corp | Method and instrument for measuring optimum recording current in video tape recorder |
JPS62192005A (en) * | 1986-02-18 | 1987-08-22 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
-
1977
- 1977-11-18 JP JP13917277A patent/JPS5472025A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258402A (en) * | 1985-09-06 | 1987-03-14 | Sony Corp | Method and instrument for measuring optimum recording current in video tape recorder |
JPS62192005A (en) * | 1986-02-18 | 1987-08-22 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
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