JPS5630656A - Digital signal sn measuring apparatus - Google Patents
Digital signal sn measuring apparatusInfo
- Publication number
- JPS5630656A JPS5630656A JP10547379A JP10547379A JPS5630656A JP S5630656 A JPS5630656 A JP S5630656A JP 10547379 A JP10547379 A JP 10547379A JP 10547379 A JP10547379 A JP 10547379A JP S5630656 A JPS5630656 A JP S5630656A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- digital
- noise
- external input
- multiplexing
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To achieve a simultaneous measurement of signal and noise levels with a simple construction by multiplexing external input digital signals.
CONSTITUTION: An external input digital signal is applied to a multiplexing converter 6 whose output is impressed on a digital filter 7. After the signal and noise components extracted with a digital filter 7 is square detected with a square multiplier 10, they are applied to a digital integrator 14. Two unit delaying devices 12 and 13 composing a digital integrator 14 respectively provide integral outputs of the signal and noise components and the level difference between the signal and the noise is determined with a subtractor 17 after logarithmic conversion by logarithmic converters 15 and 16. The signal of the difference is represented by the SN value and indicated on the display.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10547379A JPS5630656A (en) | 1979-08-21 | 1979-08-21 | Digital signal sn measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10547379A JPS5630656A (en) | 1979-08-21 | 1979-08-21 | Digital signal sn measuring apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5630656A true JPS5630656A (en) | 1981-03-27 |
JPS6256986B2 JPS6256986B2 (en) | 1987-11-28 |
Family
ID=14408556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10547379A Granted JPS5630656A (en) | 1979-08-21 | 1979-08-21 | Digital signal sn measuring apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5630656A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59181449A (en) * | 1983-03-31 | 1984-10-15 | Jeol Ltd | Two-step deflector for electron microscopes |
US5204567A (en) * | 1990-07-09 | 1993-04-20 | Asmo Co., Ltd. | Brushless motor with resilient shaft end-play absorber |
-
1979
- 1979-08-21 JP JP10547379A patent/JPS5630656A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59181449A (en) * | 1983-03-31 | 1984-10-15 | Jeol Ltd | Two-step deflector for electron microscopes |
US5204567A (en) * | 1990-07-09 | 1993-04-20 | Asmo Co., Ltd. | Brushless motor with resilient shaft end-play absorber |
Also Published As
Publication number | Publication date |
---|---|
JPS6256986B2 (en) | 1987-11-28 |
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