JPS56138363A - Jitter measurement device - Google Patents
Jitter measurement deviceInfo
- Publication number
- JPS56138363A JPS56138363A JP17550080A JP17550080A JPS56138363A JP S56138363 A JPS56138363 A JP S56138363A JP 17550080 A JP17550080 A JP 17550080A JP 17550080 A JP17550080 A JP 17550080A JP S56138363 A JPS56138363 A JP S56138363A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- jitter
- video signal
- mixer
- displaying
- 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
Links
Abstract
PURPOSE: To measure a jitter component included in a video signal easily, by using a reference signal displaying the specified jitter standard value and the display signal enlarging and displaying the jitter component included in a video signal.
CONSTITUTION: The video signal from the terminal 9 is only a horizontal synchronizing signal and fed to the monostable multivibrator B after signal. The phase comparator 14 constitutes PLL together with the voltage controlled oscillator 15 to detect the jitter components. In the frequency correction circuit 16, the weighting amount is reduced for the low frequency region hardly sensible of visual, and frequency correction is made with the weighting curve characteristics almost in agreement with the AFC characteristics of the receiver at higher frequency region. This output is amplified at the amplifier 17 to be a jitter display signal. The monostable multivibrators 19, 23 decide the position of the reference white lines A, B, and the position on the playback picture can arbitrarily be adjusted with a volume control. The jitter display signal from the differentiation circuit 21 (being J line) and the reference signal from the mixer 26 are output on the image receiver 7 via the mixer 10.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17550080A JPS56138363A (en) | 1980-12-12 | 1980-12-12 | Jitter measurement device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17550080A JPS56138363A (en) | 1980-12-12 | 1980-12-12 | Jitter measurement device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52018716A Division JPS6031304B2 (en) | 1977-02-24 | 1977-02-24 | Jitter measurement method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56138363A true JPS56138363A (en) | 1981-10-28 |
JPS6151838B2 JPS6151838B2 (en) | 1986-11-11 |
Family
ID=15997120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17550080A Granted JPS56138363A (en) | 1980-12-12 | 1980-12-12 | Jitter measurement device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56138363A (en) |
-
1980
- 1980-12-12 JP JP17550080A patent/JPS56138363A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6151838B2 (en) | 1986-11-11 |
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