JPS6472650A - System for monitoring data transmission quality - Google Patents
System for monitoring data transmission qualityInfo
- Publication number
- JPS6472650A JPS6472650A JP62228524A JP22852487A JPS6472650A JP S6472650 A JPS6472650 A JP S6472650A JP 62228524 A JP62228524 A JP 62228524A JP 22852487 A JP22852487 A JP 22852487A JP S6472650 A JPS6472650 A JP S6472650A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- amplitude
- deviation
- phase
- deciding
- 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
Abstract
PURPOSE:To easily observe to what extent a random noise or a jitter effects in an amplitude direction and phase direction for the amplitude of a signal point by separating the deviation between the signal before decided with a decision device and the signal after the decision at every signal point in the amplitude direction and the phase direction, and taking their mean squares. CONSTITUTION:A deciding means 3 to output a deciding signal indicating a decision value on a complex plane, an amplitude deviation detecting means 6 to output an amplitude deviation signal proportional to the amplitude element of the deviation between the deciding signal and a complex signal, a phase deviation detecting means 7 to output a phase deviation signal proportionate to the phase element of the deviation between the deciding signal and the complex signal, and an averaging means 8 to calculate the mean square values of an amplitude deviation signal and the phase deviation signal, and a means 9 to output the signal corresponding to the size of the amplitude of the deciding signal are provided. Thus, it can easily be observed on the screen of an oscilloscope that to what extent the random noise and the jitter affect the amplitude of the signal point in the amplitude direction and the phase direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62228524A JPS6472650A (en) | 1987-09-14 | 1987-09-14 | System for monitoring data transmission quality |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62228524A JPS6472650A (en) | 1987-09-14 | 1987-09-14 | System for monitoring data transmission quality |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6472650A true JPS6472650A (en) | 1989-03-17 |
Family
ID=16877767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62228524A Pending JPS6472650A (en) | 1987-09-14 | 1987-09-14 | System for monitoring data transmission quality |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6472650A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5081881A (en) * | 1988-05-18 | 1992-01-21 | Nissan Motor Company, Ltd. | Fluid filled elastomeric damping device |
JPH05243986A (en) * | 1991-09-10 | 1993-09-21 | John Fluke Mfg Co Inc | Method and device for reducing noise for phase locked loop |
WO2005006695A1 (en) * | 2003-07-09 | 2005-01-20 | Sony Corporation | Digital broadcast receiving apparatus and receiving method |
US7095797B2 (en) | 2001-08-17 | 2006-08-22 | Matsushita Electric Industrial Co., Ltd. | Method of modulating a data signal with modulation switching between direct and differential modulation and apparatus for modulation |
-
1987
- 1987-09-14 JP JP62228524A patent/JPS6472650A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5081881A (en) * | 1988-05-18 | 1992-01-21 | Nissan Motor Company, Ltd. | Fluid filled elastomeric damping device |
JPH05243986A (en) * | 1991-09-10 | 1993-09-21 | John Fluke Mfg Co Inc | Method and device for reducing noise for phase locked loop |
US7095797B2 (en) | 2001-08-17 | 2006-08-22 | Matsushita Electric Industrial Co., Ltd. | Method of modulating a data signal with modulation switching between direct and differential modulation and apparatus for modulation |
WO2005006695A1 (en) * | 2003-07-09 | 2005-01-20 | Sony Corporation | Digital broadcast receiving apparatus and receiving method |
US7561212B2 (en) | 2003-07-09 | 2009-07-14 | Sony Corporation | Digital broadcast receiving apparatus and receiving method |
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